Library

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1965-1969  (8,218)
  • 1920-1924
  • Polymer and Materials Science  (8,218)
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 1-12 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Investigation into the pitting corrosion of passive austenitic CrNi steels in neutral chloride solutionsStainless steels of the 18/8 CrNi-Type suffer pitting corrosion by halogen ions. Potentiokinetic, galvanostatic and potentiostatic tests as well as the ferro-ferricyanide-tests showed that pitting susceptibility increases with Cl- content, temperature and oxygen content of the electrolyte, with decreasing homogeneity and purity of the material. Cold-working is without significant influence on the pitting potential. Mn up to 11,2% increases pitting potential by 50 mV, Ni up to 25% increases the potential by 200 mV, Cr up to 30 and Mo up to 4,6% increase the potential by max. 900 mV in 3% NaCl of pH 7,5 at 22° C. The four methods employed gave the same pitting potentials. Before arriving at the potential of stationary pitting all steels showed a region where formation and repassivation of single pits occur.Cathodic protection to suppress pitting causes H2-absorption. The amount of absorbed H2 increases as the potential becomes more negative. Hydrogen embrittlement was not observed. The absorbed H2 impairs pitting resistance. The study of Cl--adsorption as a pitting releasing process by help of the potentiostatic method, working with a reference source of triangular alternating voltage gave no indication of a preferential Cl--adsorption or an Cl--adsorption-potential near the pitting potential.
    Notes: Passive 18/8 Cr-Ni-Stähle unterliegen der durch Halogenionen hervorgerufenen Lochfraßkorrosion. Die Durchführung potentiokinetischer, potentiostatischer und galvanostatischer Versuche sowie des Indikatortestes zeigte, daß die Lochfraß-anfälligkeit von Chrom-Nickel-Stählen mit dem Chlorionengehalt, der Temperatur und dem Sauerstoffgehalt des Elektrolyten sowie mit abnehmender Homogenität und Reinheit des Werkstoffes ansteigt. Eine Kaltverformung zeigt keinen eindeutigen Einfluß. Überhöhte Potential-Vorschubgeschwindigkeiten verfälschen das Ergebnis der potentiokinetischen Messungen des Lochfraßpotentials. In 3%iger NaCl-Lösung vom pH-Wert 7,5 bei 22° C erhöhen Mn-Gehalte bis 11,2% und Ni-Gehalte bis 25% das Lochfraßpotential um maximal 50 bzw. 200 mV, Cr-Gehalte bis 30% sowie Mo-Gehalte bis 4,6% steigern das Lochfraßpotential um maximal 900 mV. Die vier Untersuchungsverfahren ergaben Übereinstimmende Ergebnisse bzw. Lochfraßpotentiale. Alle Stähle zeigten vor dem Potential des stationären Lochfraßes einen Potentialbereich, in dem repassivierbarer Lochfraß beobachtet wurde.Kathodischer Schutz zur Verhinderung von Lochfraß bewirkt eine mit negativer werdendem Potential zunehmende Wasserstoffaufnahme, jedoch keine Beeinflussung der Kerbschlagzähigkeit. Dagegen vermindert der aufgenommene Wasserstoff die Lochfraßbeständigkeit des Stahls. Die Untersuchung der Chlorionenadsorption als lochfraßauslösendem Vorgang mit der potentiostatischen Dreiecksspannungsmethode ergab keinen Hinweis auf die bevorzugte Cl--Adsorption oder ein Cl--Adsorptionspotential in der Nähe des Lochfraßpotentials.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 35-37 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 30-35 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Application of zirconium in chemical plant constructionIt ist in this decade only, that zirconium has become an established special material in chemical plant construction. Zirconium is used in particular where high corrosion resistance is required, e.g. with processes involving sulfuric, hydrochloric, nitric and phosphoric acids, chlorides (except ferric and cupric chlorides), alkalies, urea, hydrogen peroxide and lactic acid. Preferred types of equipment are reaction columns, pump casing, heat exchangers and tubing, e.g. in connection with the production of dyes, pigments (erosion resistance), foods, hydrogen peroxide and urea. The price of zirconium, though still high if compared with that of nickel-base alloys or high-alloy stainless steels is soon amortized as a consequence of the low maintenance requirement.
    Notes: Zirkonium ist im Laufe von nur 10 Jahren zu einem fest eingeführten Sonderwerkstoff des Apparatebaues geworden. Es wird vor allem bei hohen Ansprüchen an die Korrosionsbeständigkeit eingesetzt, z.B. bei Verfahren mit Schwefel-, Salz-, Salpeter- und Phosphorsäure, Chloriden (außer Eisen-III- und Kupfer-II-chlorid), Alkalien, Harnstoff, Wasserstoffsuperoxid, Milchsäure. Bevorzugte Apparaturen sind Reaktionstürme, Pumpengehäuse, Wärmeaustauscher und Rohrleitungen, z.B. bei der Herstellung von Farbstoffen, Pigmenten (Erosionsbeständigkeit), Nahrungsmitteln, Wasserstoffsuperoxid und Harnstoff. Der noch immer höhere Preis des Zirkoniums im Verleich mit Legierungen auf Bickelbasis oder hochlegierten nichtrostenden Stählen amortisiert sich bald aufgrund des geringen Wartungsbedarfs.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 54-67 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 77-79 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 85-85 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 86-86 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969) 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 102-108 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Occurrence, formation and phase transformation of β-FeOOH in rustA prerequisite to the formation of β-FeOOH is the presence of chloride or fluoride ions. These may take the form of corresponding acids, or of their salts. β-FeOOH is formed in the presence even of minute quantities of chloride, e. g. also under conditions of pitting corrosion, when FeCl2, - 4 H2O is formed. If the chloride input ceases, the hitherto unaffected surfaces will be affected by the normal α or γ-FeOOH, as the chloride ions are then fixed in the β-FeOOH lattice. β-FeOOH remains stable at low PH values only; at higher PH values, it is transformed into the α-modification or hematite. In contact with metallic iron, β-FeOOH has the effect of accelerating the corrosion rate, probably because of the continued liberation of chloride ions.
    Notes: Für die Bildung von β-FeOOH ist die Anwesenheit von Chlorid- oder Fluoridionen Voraussetzung. Diese können in Form der entsprechenden Säuren oder auch von Salzen vorliegen. Schon bei An- wesenheit kleinster Chloridmengen entsteht dabei β-FeOOH, z. B. auch unter Lochfraßbedingungen, wobei FeCl2·4H2O entsteht. Hört die Chloridzufuhr auf, so entsteht an den freien Flüchen noch das übliche α- oder γ-FeOOH, da die Chlorionen dann im Gitter von β-FeOOH fixiert sind. Das β-FeOOH ist nur bei niedrigen PHWerten stabil, bei höheren Werten wandelt es sich in die σ-Modifkation oder in Hämatit um. σ-FeOOH wirkt in Kontakt mit metallischem Eisen korrosionsbeschleunigend, wahrscheinlich weil hierbei immer wieder Chlorionen freiwerden.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 125-126 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The chemical equilibria encountered with the chromium-plating of steelIn order to determine the equilibrium conditions, the authors investigated, in the compound system Fe(s) + CrJ2(g) ⇌ Cr(s) + FeJ2(g) used for diffusion-type chromium plating, the two stages Cr(s)+ 2J(g) ⇌ CrJ2(g) and Fe(s) + 2J(g) ⇌ FeJ2(g) which determine the reaction rate. The former stage was investigated at a temperature range of 700 to 1160° C, the latter at 760 to 1080° C. In this temperature range, the equilibrium is shifted somewhat to the left, the shift increasing with higher temperatures. However, as the general correlation of the equilibrium constants with temperature is low, it may be assumed that chromium-plating could be carried out over a much wider temperature range than is usual at present.
    Notes: Für die Ermittlung der Gleichgewichts-beziehungen wurden in dem für die Diffusionsverchromung verwendeten Verbindungs-system Fe(f) + CrJ2(g) ⇌ Cr(f) + FeJ(g) die beiden geschwindigkeitsbestim-menden Schritte Cr(f)+ 2 J(g) ⇌ CrJ2,(g) und Fe(f) + 2 J(g) ⇌ FeJ2(g) untersucht, und zwar die erste bei 700-1100, die zweite bei 760 und 1080° C. Das Gleichgewicht ist im untersuchten Temperaturbereich etwas nach links verschoben, und zwar um so stärker, je höher die Temperatur ist. Die insgesamt geringe Temperaturabhängigkeit der Gleichgewichtskonstanten läßt jedoch vermuten, daß die Inchromierung in einem weit breiteren Temperaturbereich geführt werden kann als es bisher in der Praxis geschieht.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 11
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969) 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 12
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 43-48 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 13
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 108-118 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The problem of pitting corrosion with copper pipes in drinking water mainsInvestigations into cases of corrosion observed on copper pipes of water mains in Vienna and Linz have given rise to some useful practical knowledge concerning corrosion prevention: Lengthy periods of stagnation after the installation are detrimental whilst short periods of stagnation are beneficial. This is because, in the latter case, protective layers (Cu2O) are formed whilst, in the former case  -  and especially if there is no intermediate rinsing  -  the sedimentation of suspend matter is liable to cause the formation of a non-uniform cover layer. The thickness of the cover layer must not exceed a certain critical value as the elasticity of the layer would otherwise decline so that metal would be bared when the pipe is bent. Soldering at the time of installation calls for great care since soldering remnants are, in principle, detrimental. In contrast, the aggressivity of the water (ions, sedimentations) is not of major importance if the above-mentioned conditions are met.
    Notes: Untersuchungen an Korrosionsfällen in kupfernen Wasserleitungsrohren (Wien und Linz) ermöglichen einige für die Praxis wichtige Hinweise zur Korrosionsverhinderung: längere Stillstandsperioden nach Installation sind ungünstig, kürzere Stillstandsperioden hingegen günstig, weil im letzten Falle schützende Deckschichten entstehen (Cu2O), während im ersten Falle  -  besonders, wenn zwischenzeitlich nicht gespült wird. Die Dicke der entstehenden Deckschicht darf eine gewisse Grenze nicht überschreiten, da sonst die Elastizität der Deckschichten abnimmt und beim Biegen der Rohre Metall freigelegt wird. Löten bei der Installation erfordert große Vorsicht, da Lötmittelrückstände grundsätzlich nachteilig sind. Die Aggressivität des Wassers (Ionen, Ablagerungen) spielt hingegen keine große Rolle, sofern die obengenannten Voraussetzungen erfüllt sind.
    Additional Material: 19 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 14
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 73-75 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 15
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 80-84 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 16
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 17
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 18
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 12-19 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The effect of water on paint coatingsThe water absorption of varnishes and organic coatings is normally known as “swelling”. In many cases, however, a homogeneous water absorption through swelling of the polymer substance is of lesser importance than a heterogeneous water absorption. The latter may occur at the inner interfaces of a lacquers or plastic coating, e.g. at the interface between coating base, at the interface between polymer substance (binder) and filler (pigment), or at the interfaces within the polymer substance itself. One important cause of heterogeneous water absorption is the occurence of osmotic processes which are caused by water soluble substances present or originating at the boundaries. With such absorption, the freezing temperature of the polymer substance plays an important part. It is possible to ascertain experimentally how polymer films are absorbing the water. In this way, the influence of water on the film properties can be better evaluated than by simply ascribing all the water intake to a swelling process.
    Notes: Die Wasserabsorption von Lacken und organischen Beschichtungen wird üblicherweise als Quellung bezeichnet. Häufig ist aber eine homogene Wasserabsorption durch Quellung der Polymersubstanz gegenüber einer heterogenen Wasseraufnahme von untergeordneter Bedeutung. Eine hetrogene Wasseraufnahme kann an inneren Grenzflächen einer Lack- oder Kunststoffbeschichtung erfolgen, z.B. an der Grenzfläche zum Untergrund, an der Grenzfläche zwischen Polymersubstanz (Bubdenuttek) und Füllstoff (Pigment) oder an Grenzflächen innerhalb der Polymersubstanz selbst. Eine wichtige Ursache für heterogene Wassereinlagerungen sind osmotische Vorgänge, die durch an den Grenzflächen vorhandene oder dort entstehende wasserlösliche Stoffe verusacht werden. Die Einfriertemperatur der Polymersubstanz spielt bei dieser Einlagerung eine wichtige Rolle. Es ist experimentell möglich, festzustellen, in welcher Weise gefükkte Polymerfilme Wasser absorbieren. Dadurch läßt sich der Einfluß von Wasser auf Filmeigenschaften besser beurteilen, als wenn alles aufgenommene Wasser summarich einem Quellungsvorgang zugeschrieben wird.
    Additional Material: 16 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 19
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 19-22 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Adhesive strength in interfacesOn the thesis that the adhesion between two phases - e.g. coating and substratum - is a function of the interfacial tension at the phase boundary concerned, tests have been carried out on a number of different surface protection systems. To begin with the thesis was corroborated by testing the adhesive strength of PTFE powder on different plastics. It was also found that the tensile and peeling strength calues of glued plastics show a rapid decline as the interfacial tension between plastics and hardened adhesive increases. In analogy, the same correlation was found to apply to the fouling resistance of coatings. -With decreasing interfacial tension, i.e. with increasing wettability, the resistance to fouling will decrease. In practice, it is necessary to accept a compromise in order to obtain an adequate adhesive strength of the lacquers film yet, at the same time, a low fouling-proneness.
    Notes: Ausgehend von der Annahme, daß die Haftfestigkeit zwischen zwei Phasen -z.B. Anstrichfilm und Substrat- eine Funktion der Grenzflächenspannung an der betreffenden Phasengrenzfläche ist, werden verschiedene Systeme zum Oberflächenschutz überprüft. Zunächst wird die Annahme bestätigt in Versuchen über das Haftvermögen von PTFE-Pulver an verschiedenen Kunststoffen. Außerdem wird gefunden, daß die Zug- und Schälfestigkeit verklebter Kunststoffe mit zunehmender Grenzflächenspannung zwischen Kunststoff und ausgehärtetem Klebstoff rasch abnehmen. In Analogie dazu wurde festgestellt, daß die gleiche Beziehung auch für die Verschmutzbarkeit von Anstrichfilmen gilt: mit abnehmender Grenzflächenspannung, d.h. zunehmender Benetzbarkeit, nimmt die Verschmutzungsanfälligkeit zu. In der Praxis ist man gezwungen, einen Kompromiß zu suchen, um einerseits austeichende Haftfestigkeit des Lackfilms und andererseits geringe Verchmutzungsanfälligkeit zu erhalten.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 20
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 126-126 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 21
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 27-29 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Corrosion indicator for devices made of metals capable of passivationThe authors describe a fully transistorized instrument which indicates changes in the corrosion behaviour on the strength of the change in potential of a metal in the vicinity of the passivation potential, and - by means of visual and acoustic signals - indicates the need for remedial measures. Conversely, the instrument is also suited to indicate changes in the surrounding medium so that it can be used for the continuous monitoring of working conditions. Its application is, however, confined to those cases where the difference in the corrosion rates in the active and passive state is considerable.
    Notes: Beschrieben wird ein volltransitorisiertes Gerät, das aufgrund der Potential-änderung eines Metalls in der Umgebung des Passivierungspotentials Änderungen im Korrosionsverhalten anzeigt und damit -über optische und akustische Signale - auf die Notwendigkeit von Abhilfemaßnahmen hinweist. Es eignet sich umgekehrt auch zur Anzeige von Veränderungen im umgebenden Medium und damit zur kontinuierlichen Überwachung von Betriebsbediungungen. Die Anwedung ist allerdings auf die Fälle beschränkt, in denen der Unterschied der Korrosions geschwindigkeit im aktiven und passiven Zustand beträchtlich ist.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 22
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 29-30 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Contribution to the problem of the corrosion of lead in the building industryThe corrosion resistance of lead in mortar can be improved by surface treatment. The best protection is obtained with a chromate layer, followed by phosphate and the sulphate layers. The corrosion resistance of the protective layers is consistently superior when the mill scale on the lead sheet is removed by pickling prior to immersion into the treating solutions. While the useful life of a lead sheet (2.6 mm thick) without surface treatment is about 58 months in lime mortar and 43 months in cement mortar, the respective values for chromated sheets are 147 and 116 months.
    Notes: Die Korrosionsbeständigkeit von Blei in Mörtel kann durch Oberflächenbehandlung verbessert werden. Den besten Schutz bietet eine Chromatierungschicht, etwas schlechter ist eine Phosphatierungsschicht, und die geringste Schutzwirkung besitzt die Sulfatschicht. Der Korrosionswiderstand der Schutzschichten ist immer dann höher, wenn die Walzhaut des Bleibleches vor dem Eintauchen in die deckschichtbildenden Lösungen durch Ätzen entfernt wird. Während die Lebensdauer eines Bleiblechs von 2,6 mm Dicke ohne Oberflächenbehandlung in Kalkmörtel etwa 43 Monate beträgt, liegt sie im Falle der chromatierten Bleche bei 147 bzw. 166 Monaten.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 23
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 37-42 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 24
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 67-72 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 25
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 79-80 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 26
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 85-85 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 27
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 86-86 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 28
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 87-93 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Evaluation of atmospheric corrosion tests with iron, copper and zinc, extending over three years, at Czechoslovak testing stationsAt three testing stations in Czechoslovakia, carbon steel, metallurgical zinc and metallurgical copper were exposed to atmospheric corrosion for three years. Samples were taken for examination after 6 weeks, 14 weeks, 6 months, 12 months and 2 years. The humidity and temperature conditions experienced during the test period were recorded in „climatographs“, and the SO2 contents were measured cumulatively. After a time, the corrosion rate is found to assume a stationary condition which has often not been recognized in previous research work because the initial periods, showing a different behaviour, were included in the evaluation. The results confirm the known close correlation between corrosion and humidity, though different mechanisms must be assumed for the different metals investigated. In the case of Zn and Cu, the SO2 content in the atmosphere is the decisive factor whilst, for Fe, the content of SO42- ions in the rust is more important. In either case, critical values are encountered which are governed, respectively, by the possibility of adsorbing SO2 at the phase boundary and by the possibility of compounding the SO42- ions in the rust.
    Notes: Auf drei atmosphärischen Prüfstationen der ČSSR wurden C-Stahl, Hüttenzink und Hüttenkupfer 3 Jahre lang exponiert; nach 6 Wochen, 14 Wochen, 6 Monaten, 12 Monaten und 2 Jahren wurden Proben zur Untersuchung entnommen. Die während des Versuchszeitraums herrschenden Feuchtigkeits- und Temperaturwerte wurden in Klimatogrammen zusammengefaßt und der SO2-Gehalt kumulativ gemessen. Für die Geschwindigkeit der Korrosion ergibt sich nach einer gewissen Zeit ein stationärer Zustand, der in bisherigen Arbeiten häufig nicht erkannt wurde, weil bei der Auswertung auch die davon abweichenden Anfangsperioden mit berücksichtigt wurden. Die Ergebnisse bestätigen die schon bekannte starke Abhängigkeit der Korrosion von der Feuchtigkeit, wobei für die untersuchten Metalle verschiedene Mechanismen angenommen werden müssen. Für Zn und Cu ist der Gehalt an SO2 in der Atmosphäre entscheidend, während für Fe der Gehalt an SO42--Ionen im Rost ausschlaggebend ist. In beiden Fällen treten kritische Werte auf, die einmal durch die Möglichkeiten der Adsorption von SO2 an der Phasengrenze, zum anderen durch die Bindungsmöglichkeit für SO42--Ionen im Rost bedingt sind.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 29
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 94-98 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Electron-optical and electro-chemical investigation into the passive behaviour of fine lead in hot concentrated sulphuric acidThe passivation of fine lead in hot concentrated sulphuric acid is exclusively governed by a lead sulphate layer. A stable passive condition can only be maintained within a narrow range of potentials. In the trans-passive zone (above + 600 mV), as with potentials below the passivation potential, a loose suphate layer is formed. In either case, pitting corrosion is liable to occur. Whether any compounds of tetravalent lead play a part in the passivation phenomena has not yet been fully clarified.
    Notes: Die Passivierung von Feinblei in heißer konzentrierter Schwefelsäure ist ausschließlich durch eine Bleisulfatschicht bedingt. Der stabile Passivzustand läßt sich nur in einem engen Potentialbereich aufrechterhalten. Im transpassiven Bereich (Über + 600 mV) entsteht ebenso wie bei Potentialen unterhalb des Passivierungspotentials eine lockere Sulfatschicht, wobei es in beiden Fällen zu Lochfraß kommen kann. Ob an den Passivierungsvorgängen auch Verbindungen des vierwertigen Bleis beteiligt sind, konnte noch nicht eindeutig geklärt werden.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 30
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 126-126 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 31
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 85-85 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 32
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 86-86 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 33
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. I 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 34
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 98-102 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The corrosion resistance of the silicides of transitional metalsThe disilicides of Ti, V, Nb, Ta, Cr, Mo and W, as well as Mo5Si3, Mo3Si and W3Si2 have, in general, an extremely high resistance to acids. However, the silicides of Mo and W have a low resistance to most acids whilst the remaining silicides have a high resistance to nitric, hydrochloric and sulphuric acid, but a low resistance to hydrofluoric acid, but a low resistance to hydrofluoric acid. Similar conditions are encountered for hydroazoic acid whilst the resistance of all silicides to NaOH is poor. The high resistance to acids is due to the formation of a surface layer rich in SiO2. To obtain comparable results, the silicides were ground to powder which was then fused in a plasma are into fairly uniform globules.
    Notes: Die Disilicide von Ti, V, Nb, Ta, Cr, Mo und W sowie Mo5Si3 Mo3Si und W3Si2 sind im allgemeinen äußerst beständig gegen Säuren. Schlecht beständig in den meisten Säuren sind die Silicide von Mo und W, während die übrigen Silicide in Salpeter-, Salz- und Schwefelsäure gut, in Flußsäure schlecht beständig sind. Ähnliche Verhältnisse ergeben sich auch für Stickstoffwasserstoffsäure, während in Natriumhydroxid sämtliche Silicide schlecht beständig sind. Die gute Beständigkeit in Säuren beruht auf der Bildung einer SiO2-reichen Oberflächenschicht. Um vergleichbare Ergebnisse zu erhalten, wurden die Silicide nach ihrer Herstellung gemahlen und in einem Plasmabrenner zu ziemlich einheitlichen Kügelchen geschmolzen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 35
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 119-124 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The electrode behaviour of zinc and iron in calcium hydroxide solutions and in mortarThe behaviour of zinc (fine zinc and metallurgical zinc) and of unalloyed steel in a saturated calcium hydroxide solution and in mortar has been the subject of electrode-kinetic investigations. The observations showed that the behaviour of fine zinc, metallurgical zinc and galvanized steel is more or less identical, and that even the mortar coating has little effect on the electrode behaviour. It is found that (a)zinc is passivated by a zinc oxide layer;(b)the potential of a short-circuit cell consisting passive zinc and iron becomes so negative that hydrogen is developed at the iron at an appreciable rate;(c)the passivity Of the zinc in a solution containing chloride is removed at a much higher chloride concentration than that of steel.In the case of a galvanized electrode with an electrolytically dissolved layer of pure zinc, the current/potential characteristic was similar to that of the passive iron.
    Notes: Es wurden elektrodenkinetische Untersuchungen über das Verhalten von Zink (Feinzink und Hüttenzink) und von un-legiertem Stahl in gesättigter Calcium-hydroxidlösung und in Mörtel ausgeführt. Die Messungen ergaben, daß sich Feinzink, Hüttenzink und feuerverzinkter Stahl im wesentlichen gleich verhalten und daß auch die Mörtelumhüllung das Elektrodenverhalten kaum verändert. Es wird festgestellt, (a)daß Zink durch eine Zinkoxidschicht passiviert wird,(b)daß das Potential einer Kurzschlußzelle aus passivem Zink und Eisen so negativ wird, daß am Eisen mit merklicher Geschwindigkeit Wasserstoff entwickelt wird,(c)daß die Passivität des Zinks in chloridhaltiger Lösung erst bei wesentlich, höherer Chloridkonzentration aufgehoben wird als die des Stahls.Bei einer feuerverzinkten Elektrode mit elektrolytisch abgetragener Reinzinkschicht war die Stromspannungskurve der des passiven Eisens ähnlich.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 36
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 127-131 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 37
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 159-161 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 38
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 171-181 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 39
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 181-181 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 40
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 183-194 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Investigations into the electrolytic-potentiostatic etching of stainless steels in 10 n NaOH, using a coulometerCurrent density/potential characteristics can only provide qualitative indications concerning the phenomena encountered with potentiostatic etching in 10 n NaOH. The process is best carried out in the trans-passive zone. Identification is based, not on the selective dissolution of certain standard components, but on the interference colours which can be observed as a result of the formation of cover layers of different thickness. The charge density/time characteristics also permit quantitative indications of the different phases. Current density/time curves permit a clarification of the mechanism govering the formation of cover layers. A ferritic steel (28 pC Cr) and a NiCr alloy (45 pC Cr) were found to follow a cubic law of growth, whilst CrNi steel 18-8 is initially governed by an approximately logarithmic law, followed by a zone extending over several hours where the growth begins to follow a parabolic law.
    Notes: Stromdichte-Potential-Kurven ermöglichen nur qualitative Aussagen über die Vorgänge beim potentiostatischen Ätzen in 10 n NaOH. Am günstigsten ist Ätzen im Transpassivbereich. Die Identifizierung erfolgt dabei nicht durch selektive Auflösung bestimmter Gefügebestandteile, sondern aufgrund der Interferenzfarben, die infolge der Bildung unterschiedlich starker Deckschichten zu beobachten sind. Die Ladungsdichte-Zeit-Kurven ermöglichen auch Aussagen über die Mengen der einzelnen Phasen. Stromdichte-Zeit-Kurven ermöglichen eine Aufklärung des Deckschichtbildungsmechanismus. Für einen ferritischen Stahl (28% Cr) und eine NiCr-Legierung mit 45% Cr gilt ein kubisches Wachstumsgesetz, während für CrNi-Stahl 18-8 zunächst ein annähernd logarithmisches Gesetz gilt, an das sich ein mehrstündiger Bereich anschließt, in dem übergang zu einem parabolischen Schichtwachstum erfolgt.
    Additional Material: 24 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 41
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 206-208 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Electro-chemical examination of solutions containing inhibitors for temporary corrosion protectionThe products of lubricant type hitherto mainly used for temporary corrosion protection are increasingly superseded by aqueous solutions. Potentiostatic examinations have shown that solutions containing ammonium oxalate, sodium oxalate or sodium nitrite  -  possibly with an admixture of starch or glycerine  -  are suitable for this purpose. The action mechanism shows fairly great differences. Whilst the inhibiting effect of sodium oxalate is confined to the cathodic reaction, the effect of ammonium oxalate also extends to the anodic reaction. Ammonium oxalate is much more effective than sodium nitrite. It has not yet been possible to establish with certainty whether the protective effect is due to the formation of an oxa-late film, or to the adsorption of the oxalate ions, or to the reaction with oxygen.
    Notes: Statt der bisher meist verwendeten schmierstoffähnlichen Produkte fü den zeitweiligen Korrosionsschutz finden zunehmend wäßrige Lösungen Anwendung. Potentiostatische Untersuchungen haben gezeigt, daß Lösungen mit Ammoniumoxalat, Natriumoxalat oder Natriumnitrit, gegebenenfalls mit Zusatz von Stärke oder Glycerin, für diesen Zweck geeignet sind. Der Wirkungsmechanismus ist ziemlich verschieden. Während Natriumoxalat nur die kathodische Reaktion inhibiert, erstreckt sich die Wirkung von Ammoniumoxalat ist dabei wesentlich wirksamer als Natriumnitrit. Ob die Schutzwirkung bedingt ist durch Bildung einer Oxalatschicht, Adsorption der Oxalation oder Bindung von Sauerstoff, konnte noch nicht eindeutig entschieden werden.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 42
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Electrochemical measuring methods for studying stress-corrosion cracking and corrosion fatigueAn apparatus is described for the investigation of local corrosion phenomena with simultaneous static and dynamic loading. The apparatus enables measurements to be made of potential variations in time, interdependance of current density and potential, and current density variation at constant potential. It is shown that stress corrosion cracking of carbon steel in boiling Ca(NO3)2, solution and of soft iron in NaOH is a clear local corrosion process. Analogous results are obtained with austenitic stainless steel in an activating medium. Corrosion fatigue of passive austenitic steels can be produced in SO, saturated water or in ferroammonium sulphate solution. Between corrosion fatigue and stress corrosion cracking there is a number of analogies but there are also differences. Stress corrosion cracking strongly depends from material composition but may be produced by almost any medium, while corrosion fatigue is possible in certain media only, but is not related with a particular metal composition.
    Notes: Beschrieben wird eine Apparatur zur Untersuchung örtlicher Korrosionserscheinungen bei gleichzeitiger statischer und dynamischer Werkstoffbeanspruchung. Die Apparatur ermöglicht die Messung von zeitlichen Potentialänderungen, der Abhängigkeit von Stromdichte und Potential und der Änderung der Stromdichte bei konstantem Potential. Es wird nachgewiesen, daß die Spannungsrißkorrosion von C-Stahl in Siedender Ca(NO3)2- Lösung und von Weicheisen in NaOH ein ausgesprochener Lokalkorrosionsvorgang ist. Für austenitische nichtrostende Stäble erhält man mit einem aktivierenden Medium analoge Ergebnisse. Schwingungsrißkorrosion passiver austenitischer Stähle kann in mit Schwefeldioxid gesättigtem Wasser oder Ferroammonsulfatlösung der- zeugt werden. Zwischen Schwingungsrißkorrosion und Spannungsrißkorrosion be- stehen zahlreiche Analogien, doch auch Unterschiede. Spannungsrißkorrosion ist stark abhängig von der Werkstoffzusam-mensetzung, kann jedoch durch fast jedes dien möglich ist, jedoch an keine bestimmte rißkorrosion ist nur in bestimmten Medien möglich, ist jedoch an keine bestimmte Metallzusammensetzung gebunden.
    Additional Material: 17 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 43
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 228-236 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 44
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 248-253 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 45
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 263-268 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 46
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 272-279 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 47
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 279-279 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 48
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. IX 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 49
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 323-327 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Investigations into the causes of stress corrosion cracking with stainless, C-stabilized austenitic Cr-Ni-steelsWith the deformation of specimens (steel with 17 per cent. Cr, 10 per cent Ni) in boiling MgCl2 solution, the potential is shifled to the negative side, at a rate which increases with the expansion rate. This phenomenon is ascribed to the fact, that, with slow expansion, the active zones are again apt to be passivated. It is only when major cracks are already present that the expansion rate at the bottom of the crack becomes so high that no passivation takes place any more and that the potential remains continuously below that required for stress corrosion cracking. Between stres corrosion cracking and pitting corrosion, there is a correlation inasmuch as the pitting has a corrosioninhibiting effect. The hydrogen and chlorme ions which accumulate in the pitting have the effect of shifling the potential to the negative side so that, during expansion, the potential is no longer much below the negative potential required for stress corrosion cracking. This interpretation is derived from the different behaviour of specimens which were exposed to loads after brief polarisation (causing pitting corrosion), and directly.
    Notes: Bei der Verformung von Proben (Stahl mit 17 % Cr, 10 % Ni) in siedender MgCl2-Lösung wird das Potential unedler, und zwar zunehmend mit der Dehnungsgeschwindigkeit. Diese Erscheinung wird damit gedeutet, daß bei langsamer Dehnung die aktiven Bereiche wieder passiviert werden können. Lediglich wenn schon größflere Risse vorliegen, wird die Dehngeschwindigkeit am Rißgrund so hoch, daß dort keine Passivierung mehr auftritt und das für Spannungsrißkorrosion erforderliche Potential dauernd unterschritten wird. Zwischen Spannungsrißkorrosion und Lochfraß besteht insofern eine Beziehung, als die Löcher korrosionsverzögernd wirken. Die Wasserstoff- und Chlorionen, die sich in den Löchern ansammeln, verschieben das Potential zu negativen Werten, so daß bei Dehnung das für die Spannungsrißkorrosion erforderliche negative Potential kaum noch unterschritten wird. Diese Deutung ergibt sich aus dem unterschiedlichen Verhalten von Proben, die nach kurzer Vorpolarisation (Lochfraßauslosung) und direkt belastet wurden.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 50
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 355-366 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 51
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 370-372 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 52
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969) 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 53
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. XIII 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 54
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 396-407 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Passivation behaviour and stress corrosion cracking of iron-maganese-chromium alloys in sodium chloride solutionElectrochemical experiments with MnCr steels (20-28% Mn, up to 12% Cr) in 3% NaCl solution. High Mn contents reduce the passivation tendency, while increasing Cr contents broaden the range of passivity. The formation of surface layers is due primarily to a direct reaction with the solution (good adhesion, high protective value) and, secondarily, to precipitation from the solution (porosity, low protective value). The tendency to form secondary layers increases as the Cr content is reduced. In oxygen containing solution there is a pronounced corrosion in the pitting range. At low Cr contents, stress corrosion cracking is mostly transcrystalline, at higher Cr contents (8-12%) it is intercrystalline, in particular when Cr carbide precipitations are present at the grain boundaries. In the range of transcrystalline corrosion the susceptibility to selective corrosion extends beyond the pitting potential. At higher Cr contents there may be pitting without any indication of stress corrosion cracking.
    Notes: Electrochemische Versuche mit MnCr-Stählen (20-28% Mn, bis 12% Cr) in 3% NaCl. Hohe Mn-Gehalte verringern die Passivierungsneigung, während steigende Cr-Gehalte den Passivitätsbereich verbreitern. Die Deckschichtbildung erfolgt hierbei primär durch direkte Reaktion mit der Lösung (gute Haftung, hoher Schutzwert), sekundär durch Ausfällen aus der Lösung (Porosität, geringer Schutzwert). Die Neigung zur Bildung sekundärer Schichten steigt mit abnehmendem Cr-Gehalt. In sauer-stoffhaltigen Lösungen tritt ausgeprägte Korrosion im Lochfraßbereich auf. Bei niedrigen Cr-Gehalten verläuft Spannungsrißkorrosion meist transkristallin, bei höheren Cr-Gehalten (8-12%) interkristallin, besonders wenn an den Korngrenzen Auscheidungen von Cr-Carbid vorliegen. Im transkristallinen Korrosionsbereich ist die Anfälligkeit für selektive Korrosion über das Lochfraßpotential hinaus erweitert. Bei höheren Cr-Gehalten kann Lochfraß auftreten, ohne daß Anzeichen einer Spannungsriß-korrosion vorliegen.
    Additional Material: 33 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 55
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 436-438 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 56
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 452-454 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 57
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 339-340 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 58
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 333-339 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 59
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 366-368 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 60
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 518-522 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 61
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 530-532 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 62
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 555-561 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 63
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 64
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 569-569 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 65
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 569-569 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 66
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 486-487 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 67
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 578-583 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Cathodic corrosion of lead in the soilCathodic corrosion of lead in the soil can be expected in exceptional cases only. The corrosion found on a particular lead cable could be simulated in the laboratory. It could be confirmed, that  -  probably by decomposition of primary lead hydride  -  metallic lead is deposited below layers of Ca and Mg compounds already at potentials below -1,7 V. A special switching method was developed to account for breakthrough polarisation.
    Notes: Kathodische Korrosion von Blei im Boden ist grundsätzlich nur in Ausnahmefällen zu erwarten. Diese an einem Kabel gefundene Korrosion wurde im Laboratorium nachgebildet. Hierbei konnte bestätigt werden, daß unter Deckschichten aus Calcium- und Magnesiumverbindungen bei Potentialen schon unter -1,7 V metallisches, Blei abgeschieden wurde, wahrscheinlich durch Zersetzung von primär entstandenem Bleihydrid. Für derartige Untersuchungen wurde eine spezielle Schaltmethode entwickelt, bei welcher auch die Durchtrittspolarisation berücksichtigt wird.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 68
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 583-595 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Destruction of high purity aluminium, zinc and plexiglass by flow cavitationCavitation in cold and warm water produces a strengthening of aluminium during a first incubation period, although fine cracks are already formed which induce erosion. It is for this reason that cathodic protection remains without effect. The same applies to Zn which undergoes a limited translation (because of its lower plasticity) and twin formation and, later on, erosion. Plexiglass absorbs water, while cracks starting at weak spots in the structure induce erosion and fatigue cracks are formed later on. The second stage of cavitation is characterized by high weight losses, connected with strong changes in the material surface, while in the third stage decreasing weight losses can be found. This decrease is attributed to the fact, that the water formed by bubble implosion in cracks cannot flow out easily and thus forms a sort of protective cushion.
    Notes: Al wird während einer Inkubationsperiode durch Kalt- und Warmwasserkavitation mechanisch verfestigt, doch bilden sich schon feine Risse, welche die Erosion einleiten. Aus diesem Grunde ist kathodischer Schutz unwirksam. Gleiches gilt für Zn, bei dem es zunächst zu begrenzter Translation und Zwillingsbildung, später zu Erosion kommt. Plexiglas nimmt Wasser auf, wobei durch Erosion an schwachen Gefügestellen Erosion eingeleitet wird und später Ermüdungsrisse auftreten. Der zweite Bereich ist charakterisiert durch hohe Gewichtsverluste, verbunden mit starker Veränderung der Werkstoffoberfläche, während im dritten Stadium wieder eine Abnahme der Gewichtsverluste festzustellen ist. Diese Verringerung dürtle darauf zurückzuführen sein, daß das durch Implosion von Blasen in den Rissen entstehende Wasser dann nicht mehr leicht abfließen kann und so eine Art Schutzpolster bildet.
    Additional Material: 18 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 69
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 595-601 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Intercrystalline corrosion of the nickel alloy NiCr 20 TiAlThe corrosion behaviour of NiCr 20 TiAl shows a clear dependence from the carbon content. In Strauss solution the alloys containing 0.007% C are not susceptible to intercrystalline corrosion, while with carbon contents of 0.036 to 0.078% intercrystalline corrosion occurs similar to that in 18-8 steels. In boiling nitric acid the corrosion susceptibility further depends from the heat treatment. After cooling from the temperature of solution annealing in air high weight losses are found which even increase after ageing, while they are reduced by quenching in water and then can be found with the alloys having higher carbon contents only. The intercrystalline corrosion is attributed to a formation at the grain boundaries.
    Notes: Das Korrosionsverhalten von NiCr 20 TiAl ist stark abhängig vom C-Gehalt. In Straußscher Lösung neigen die Legierungen mit 0,007% C nicht zu interkristalliner Korrosion, während bei C-Gehalten von 0,036 bis 0,078% C interkristalline Korrosion ähnlich wie im Falle der 18/8-stähle eintritt. In siedender Salpeteräure ist die Korrosionsanfälligkeit auch noch stark von der Wärmebehandlung abhängig. Nach Abkühlen von der Temperatur des Lösungsglühens an der Luft treten hohe Gewichtsverluste auf, die nach Auslagern noch steigen, bei Abschrecken in Wasser hingegen wesentlich geringer sind und dann nur bei den höheren Kohlenstoffgehalten festgestellt werden können. Als Ursache für die Chromverarmung an den Korngrenzen infolge Carbidbildung angesehen.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 70
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 617-627 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 71
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 635-640 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 72
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 640-641 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 73
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 649-650 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 74
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 570-570 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 75
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 676-683 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The electrochemical behaviour of titaniumCurrent-potential curves established in 6 N sulfuric acid show at -0,45 V the formation of a passive layer of titanium hydride and Ti-O (oxygen content 0 to 1.0). In the subsequent range of 200 mV this layer is converted into a passive layer of the n-conductor and which consists of TiO2 with a little Ti3O5. In NaOH (1.0 and 6.0 N) a layer consisting exclusively of TiO2 is formed above -0.614 V, and above 1.8 V there is evolution of oxygen. The results are interpreted in terms of thermodynamics. The rest potential requires considerable time for reaching its stationary value, depending on the state of the surface and the moisture content of the electrode.
    Notes: In 6 n H2SO4 aufgenommene Strom-Spannung-Kurven zeigen bei -0,45V das Entstehen einer Passivschicht aus Ti-Hydrid und Ti-O (Sauerstoffgehalt 0 bis 1,0). In den anschließenden 200mV wandelt sich diese Schicht um in eine Passivschicht, die n-leitend ist und aus TiO2 mit etwas Ti3O5 besteht. In NaOH (1,0 n, 6,0 n) entsteht ab -0,614 V eine ausschließlich aus TiO2 bestehende Schicht, ab 1,8 V tritt Sauerstoffentwicklung auf. Die Einstellung des Ruhepotentials erfordert ziemlich lange Zeit abhängig von Oberflächenzustand und Feuchtigkeitsgehalt der Elektrode.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 76
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 694-696 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 77
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 711-716 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 78
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 641-644 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 79
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 732-732 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 80
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 604-612 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 81
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 613-616 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 82
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 627-633 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 83
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 644-649 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 84
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 85
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 651-658 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The behaviour of Pt/PtRh and Ni/NiMo thermal elements in the high temperature vacuum furnace in the presence of material containing chromiumDuring annealing under vacuum (10-3 to 10-4 Torr) at temperatures exceeding 1200° C, it is always necessary to reckon with the evaporation of Cr from the built-in parts of the furnace (highly alloyed steels). The evaporated Cr is, inter alia, deposited on the thermo-elements, affecting their thermal potentials and reducing their service life, due to the formation of hard and brittle inter-metal compounds. A remedy consists in the use of vacuum-tight thermo-element protection tubes (which admittedly gives rise to a certain inertia of indication) or in the reduction of the vacuum through the addition of nitrogen as soon as a temperature of 1000° C is exceeded. It is also recommended to use ceramic components or those consisting of Mo plates without Cr content.
    Notes: Bei Glühen unter Vakuum (10-3 bis 10-4 Torr) bei über 1200° C ist immer mit Verdampfen von Cr aus den Einbauteilen des Ofens (hochlegierte Stähle) zu rechnen. Das verdampfte Cr lagert sich u. a. auf den Thermoelementen ab, verändert deren Thermospannung und verkürzt deren Lebensdauer, und zwar infolge der Bildung harter und spröder intermetallischer Verbindungen. Abhilfe besteht in der Verwendung vakuumdichter Thermoelementschutzrohre (was allerdings zu einer gewissen Trägheit der Anzeige führt) oder in der Verringerung des Vakuums mittels Zusatz von Stickstoff, sobald 1000° C überschritten werden. Zu empfehlen ist auch die Verwendung von Einbauteilen aus Keramik oder aus Mo-Blechen ohne Cr-Gehalte.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 86
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 658-665 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The correlation between cavitation rate and the water temperature with the flow cavitation of effluentsCavitation in flowing water has two harmful components: mechanical and chemical damage. Mechanical damage decreases with increasing water temperature; in contrast, the corrosive effect increases greatly above 35° C. However, since plastics are not affected by electro-chemical corrosion, this component can here be neglected so that the cavitation of plastics decreases with increasing temperature. With higher temperatures, the incipient softening process will also play a part which is reflected in a change in the appearance of the separated particles. In the case of metals  -  here aluminium  -  the corrosion component cannot be neglected, i.e., after a minimum of 35° C, the cavitation increases again.
    Notes: Kavitation in strömendem Wasser setzt sich zusammen aus zwei Schadenskomponenten: mechanische und chemische Schädigung. Die mechanische Schädigung nimmt mit steigender Wassertemperatur ab, die korrosive Wirkung nimmt oberhalb 35° C beträchtlich zu. Da indessen bei Kunststoffen nicht von einer elektrochemischen Korrosion gesprochen werden kann, wird diese Komponente hier vernachlässigbar, d. h. daß die Kavitation von Kunststoffen mit steigender Temperatur abnimmt. Bei höheren Temperaturen spielt dann auch die beginnende Erweichung eine Rolle, was sich in einer Veränderung des Aussehens der abgetrennten Teilchen äußert. Im Falle von Metallen  -  hier Al  -  ist die Korrosionskomponente nicht zu vernachlässigen, d. h. daß die Kavitation nach einem Minimum bei 35° C wieder zunimmt.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 87
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 684-686 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 88
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 690-693 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 89
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 697-711 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 90
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 718-721 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 91
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 725-732 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 92
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969) 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 93
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 749-761 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Development of new lead alloys starting from electrochemical investigations into the corrosion behaviour in sulfuric acidThe corrosion of lead in sulfuric acid can take place in two different forms, corresponding to the active and passive state respectively of lead, but allowing for any intermediate stage as well. A surface layer is formed on principle, but it has different structure and effect in the two instances and requires a certain minimum duration of corrosion. Corrosion susceptibility can be substantially reduced, in particular by addition of low solubility in lead and which may thus give rise, as precipitates, to cathodic activity. Cu e.g. has a favorable effect which can be further improved by Sn. The same is true with noble metals  -  in particular Pd  -  having high hydrogen overtension. Complex alloys as e.g. PbCuPd yield a further increase in corrosion resistance and, simultaneously, mechanical strength; an alloy of the type PbCuSnPd is superior to any other lead alloy as to corrosion and creep resistance.
    Notes: Die Korrosion von Blei in Schwefelsäure kann in zwei Formen auftreten, entsprechend dem aktiven und dem passiven Zustand des Bleis, wobei jedoch sämtliche Übergänge zwischen beiden Formen möglich sind. Grundsätzlich wird auch eine Deckschicht gebildet, die sech jedoch hinsichtlich Gefüge und Wirkung bei den beiden Formen unterscheidet und immer eine gewisse Mindest-korrosionsdauer voraussetzt. Durch Legieren kann die Korrosion wesentlich verringert werden, vor allem, wenn die Zusätze in Blei nur wenig löslich sind und als Ausscheidungen kathodisch wirken z. B. Cu, dessen Wirkung durch Sn noch verbessert werden kann. Ebenso eirken Edelmetalle  -  vor allem Pd  -  mit boher Wasserstoffüberspannung. Mehrstofflegierungen, z.B. PbCuPd, erlauben eine noch weitere Steigerung der Korrosionsbeständigkeit und gleichzeitig auch der mechanischen Festigkeit; hierbei ist eine Legierung PbCuSnPd allen anderen Bleilegierungen hinsichtlich Korrosionsbeständigkeit und gleichzeitig auch der mechanischen Festigkeit; hierbei ist eine Legierung PbCuSnPd allen anderen Bleilegierungen hinsichtlich Korrosionsbeständigkeit und Kriechfestigkeit überlegen.
    Additional Material: 30 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 94
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 930-930 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 95
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 838-838 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 96
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 838-838 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 97
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 98
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 99
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. XXIX 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 100
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The present state of corrosion protection for steel structuresAs part of a synoptic survey, the author deals with the protection of steel structures (including galvanized structures) by the application of coatings. Departing from the economic damage caused by corrosion (and illustrated by some actual examples), he discusses: Relationships between surface conditions and the quality of coating; cleansing and de-rusting; methods of applying the coating (brushing, spraying); influence of environmental conditions; attainable and necessary layer thicknesses; assessment criteria (price and service life); multilayer systems; thick-layer coatings; paints applied to Zn coatings; temporary corrosion protection (rolled steel protection) by coatings; corrosion protection through suitable shaping which facilitates the application of coatings.
    Notes: Im Rahmen eines Überblicks behandelt der Verf. den Schutz von Stahlbauwerken (auch verzinkt) durch Anstriche. Ausgehend von den korrosionsbedingten wirtschaftlichen Schäden (dargestellt anhand einiger Schadensfälle aus der Praxis) werden behandelt: Beziehungen zwischen Oberflächenzustand und Anstrichqualität; Reinigen und Entrosten; Methoden zum Aufbringen des Anstrichs (Streichen, Spritzen); Einfluß der Umweltbedingungen; erreichbare und notwendige Schichtdicken; Bewertungskriterien (Preis und Lebensdauer); Mehrschichtensysteme; Dickschichtanstriche; Anstriche auf Zn-Überzügen; zeitweiliger Korrosionsschutz (Walzstahlkonservierung) durch Anstriche; Abziehlacke; Korrosionsschutz durch zweckmäßige und für Anstricharbeiten geeignete Gestaltung.
    Additional Material: 26 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...