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  • 1960-1964  (3,331)
  • 1935-1939
  • 1920-1924
  • 1961  (3,331)
  • Chemistry  (3,331)
Material
Years
  • 1960-1964  (3,331)
  • 1935-1939
  • 1920-1924
Year
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 10-15 
    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
    Notes: Neben praktischen Erfahrungen über die Größe der Proben für Korrossionsuntersuchungen nach der Gewichtsverlust-Methode, über die Zahl der Proben je Zeitstufe und die Zahl der Zeitstufen mit einem Ausblick auf die Untersuchung von Anstrichen und Spachtelmassen werden Überlegungen über die Verteilung der Zeitstufen mitgeteilt, wobei erreicht werden soll, daß weniger Proben zugleich im Einsatz sind. Drei verschiedene Zeitstufenpläne werden in Zahlentafeln dargestellt. Für das Aufsuchen der günstigsten Bedingungen für den Einsatz eines Werkstoffes werden schematische Anleitungen gegeben und eine übersichtliche Darstellung des gesamten Untersuchungsplanes mit Hilfe von Sterndiagrammen wird empfohlen. Für das Auswerten von Korrosionsversuchen und für das Umrechnen nicht genormter Größen auf genormte Werte wird auf die Verwendung von Leitertafeln hingewiesen.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 21-30 
    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
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 67-67 
    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
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 68-70 
    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
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), 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
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 98-107 
    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
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 111-111 
    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
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 125-125 
    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
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  • 9
    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
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), 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
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  • 11
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. III 
    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
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  • 12
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 157-161 
    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
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  • 13
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 175-176 
    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
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  • 14
    Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 180-182 
    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
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  • 15
    Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 183-197 
    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
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  • 16
    Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 197-198 
    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
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  • 17
    Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 201-202 
    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
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  • 18
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961) 
    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
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  • 19
    Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 244-249 
    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
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  • 20
    Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 256-256 
    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
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  • 21
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 260-265 
    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
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  • 22
    Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 267-270 
    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
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  • 23
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. VII 
    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
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  • 24
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 304-312 
    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
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  • 25
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 325-332 
    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
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  • 26
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 345-346 
    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
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  • 27
    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: Some noteworthy advice on the prevention of incrustationOn the strength of American and British publications, the compositions, the composition and the form of deposition of the incrustation formed by the evaporation of sea water are surveyed, and reference is made to an agent, developed by the British Navy, which is designed to prevent such incrustation.In addition, mention is made of some more recent structural suggestions which reduce the quantity of incrustation. Finally, an American publication is quoted where unsuitable suggestions are sharply criticized.
    Notes: Auf Grund amerikanischer und englischer Veröffentlichungen wird über die Zusammensetzung und Abscheidungsform des bei der Verdampfung von Meerwasser entstehenden Kesselsteins berichtet und auf ein in der englischen Kriegsmarine entwickeltes Mittel zur Verhütung solcher Abscheidungen hingewiesen.Darüber hinaus werden neuere konstruktive Vorschläge genannt, die zu einer Verminderung des Kesselsteins führen und schließlich auch auf eine amerikanische Publikation aufmerksam gemacht, in welcher abwegige Vorschläge scharf kritisiert werden.
    Type of Medium: Electronic Resource
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  • 28
    Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 368-368 
    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
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 29
    Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 380-382 
    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
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  • 30
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 411-411 
    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
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  • 31
    Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 412-412 
    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
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  • 32
    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: Improving the corrosion resistanceCopper and ist alloys are notorious for their excellent resistance in aqueous and gaseous media. Admittedly, however, there are no materials based on copper which can, in the strict sense, be regarded as capable of passivation. The corrosion resistance of this group of materials is, in fact, the result of the electropositive normal potential of copper, and of the existence, on the metal surface, of dense covering layers difficult to dissolve. But the applicability even of materials containing copper is impaired by corrosion phenomena such as flaking and selective and intercystalline corrosion. The examples of internal and external oxidation, of the dezincking of brass, and of stress corrosion are used to demonstrate how these specific forms of corrosion can be countered by the addition even of small quantities of a further alloying component.
    Notes: Kupfer und seine Legierungen besitzen bekanntlich in wässerigen und gasförmigen Medien eine ausgezeichnete Beständigkeit. Allerdings bestehen auf der Basis Kupfer keine als passivierbar im strengen Sinne zu bezeichnenden Werkstoffe. Die Korrosionbeständigkeit dieser Werkstoffgruppe ist vielmehr eine Auswirkung des edlen Normalpotentials von Kupfer sowie der Existenz schwerlöslicher und dichter Deckschichten auf der Metalloberfläche. Korrsionsvorgänge wie Verzunderung, selektive und interkristalline Korrosion beeinträchtigen jedoch die Einsatzmöglichkeiten auch von kupferhaltigen Werkstoffen. Am Beispiel der inneren un äußeren Oxydation, der Entzinkung von Messing und der Spannungskorrosion wird dargelegt, wie durch Zusätze schon geringer Mengen einer weiteren Legierungskomponente diese spezifischen Korrosionsformen bekämpft werden können.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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  • 33
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 422-424 
    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 influence of hydrogen peroxide on the corrosion of brassThe corrosion behaviour of brass 80/20 and 59/41 in acetic acid, phosphoric acid, citric acid, malic acid, lactic acid and tartaric acid as well as in buffered hydrochloric acid and ammonium chloride in the presence of small additions of hydrogen peroxide is investigated. In general, the intensity of corrosion was found to be considerably increased thereby. In the case of α-brass, the de-zincking process in suppressed to such an extent that decopperization is already encountered. With α/β-Brass, the zinc-rich β-phase is attacked first, followed by an attack on the α-Phase so that the overall result is an intensified corrosion attack. In the case of tartaric acid, passivation phenomena were encountered which were, however, not investigated in detail.
    Notes: Das Korrosionsverhalten von Messing 80/20 und 59/41 in Essigsäure, Phosphorsäure, Citronensäure, Äpfelsäure, Milchsäure und Weinsäure sowie gepufferter Salzsäure und Ammoniumchlorid wird in Gegenwart geringer Wasserstoffsuperoxydzusätze untersucht. Dabei wird im allgemeinen der Angriff wesentlich verstärkt. Bei α-Messing wird die Entzinkung gleichzeitig soweit zurückgedrängt, daß schon Entkupferung vorliegt, während bei α/β-Messing zunächst die zinkreiche β-Phase und erst nachher auch die α-Phase angegriffen wird, so daß sich im Endeffekt verstärkter Gesamtangriff ergibt. Im Falle der Weinsäure treten nicht näher untersuchte Passivierungserscheinungen auf.
    Additional Material: 1 Ill.
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  • 34
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 438-445 
    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 Tab.
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  • 35
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 473-475 
    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: Spotless drying and temporary corrosino protectionThe author discusses the problems of „spotless drying“ which are encountered in different industrial processing techniques, possibly in combination with the applicating, in a single operation and without additional energy consumption, of a corrosion protection film; he also deals with the possibilities of tackling these problems with the aid of so-called „de-watering fluids“. The function of dewatering fluids is explained by analyzing their composition, and the influence of this composition on the applicability of such fluids is discussed. The author has tried to take into account the practical requirements of the processing techniques themselves as well as those of the persons called upon to carry them out, and has endeavoured to show that both considerations can well be combined and may be conducive to economic production.A description is given of the two main components of de-watering fluids, viz. solvent and wetting agent, and experience gained in practical applications is discussed Again on the strength of practical experience, advice is given on the pretreatment of the workpieces required for the application of de-watering fluids as well as on the treatment, economic size, and regeneration of the baths.
    Notes: Es werden die in verschiedenen industriell verwendeten Verfahrenstechniken auftretenden Probleme der “fleckenfreien Trocknung” gegebenenfalls in Kombination mit Aufbringen eines Korrosionsschutzfilms in einem Arbeitsgang und ohne zusätzliche Energieaufwendung kurz aufgeführt und die Möglichkeiten, mit Hilfe sog. „Dewatering Fluids“ diese Probleme zu meistern, erläutert. Die Funktion von Dewatering Fluids wird anhand deren Aufbaus erklärt ung gleichzeitig wird deutlich gemacht, wie dieser Einfluß auf ihre betriebliche Eignung hat. Der Verfasser war bemüht, von den praktischen Forderungen sowohl des mit solchen Betriebsmitteln hantierenden Menschen, als auch jenen der technischen Verfahren selbst auszugehen und aufzuzeigen, daß eine Kombination beider möglich ist und fertigungswirtschaftliche Vorteile bringen kann.Die beiden Hauptkomponenten von Dewatering Fluid, das Lösungsmittel und das Netzmittel, werden näher beschrieben. Erfahrungen aus Anwendungsfällen werden abgeleitet. Für den Einsatz von Dewatering Fluids wird aus praktischen Erfahrungen über die erforderliche Vorbehandlung der Werkstücke berichtet und auch die Behandlung der Bäder, ihre wirtschaftliche Größe und deren Regeneration geschildert.
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  • 36
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 506-508 
    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
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  • 37
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 521-529 
    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
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  • 38
    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
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  • 39
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961) 
    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
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  • 40
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 560-569 
    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
    Description / Table of Contents: Observations concerning primary and secondary passivationPotentiostatic and galvanostatic measurements in sulphuric acid electrolytes have been carried out on high-purity ironchrome alloys with chromium contents ranging from 5 to 70 per cent., as well as on high-purity chromium. These measurements were supplemented by the examination of passivation curves, using the galvanostatic insertion method.The passivation currents thus measured were found to differ considerably from the values known so far. The newly found values can be calculated with the aid of an approximation formula as a function of the chromium content. Apart from the “primary” passivation, it was possible, in the concentration range from about 10 to about 40 per cent. Cr, also to observe the „secondary“ passivation which is likewise governed by the current (i) / time (t) law characteristic for passivation generally: (i - i0) t = const. As this phenomenon is greatly dependent on the pH value of the electrolyte and on the presence of complex-forming substances, it is suggested that the phenomenon might be explained by the formation, due to hydrolysis of a second passivation layer.It is assumed that, in the state of “primary passivation” the alloys are covered by a very thin film comparable to that of passive chromium, and that this film is then covered by a “secondary” passivation layer of greater thickness, similar to the iron passivation layer.In the zone of primary passivation, the alloys are anodically dissolved over the whole area whilst, the zone of secondary passivation, strong pit corrosion can be observed.
    Notes: Es wurden an sehr reinen Eisen-Chrom-Legierungen mit Cr-Gehalten von 5 bis 70% sowie an reinstem Chrom potentionstatische und galvanostatische Messungen in Schwefelsäureelektrolyten durch geführt, die durch die Untersuchung von Passivierungskurven nach der galvanostatischen Einschaltmethode ergänzt wurden.Für die Passivierungsstrommengen wurden Werte gefunden, die von den bisher bekannten erheblich abweichen. Die neu ermittelten Werte lassen sich in Abhängigkeit von Cr-Gehalt der Legierungen durch eine Näherungsformel berechnen. Neben der „primären“ konnte im Konzentrationsbereich von etwa 10 bis 40% Cr auch die „sekundäre“ Passivierung beobachtet werden, für die ebenfalls das die Passivierung kennzeichnende Strom(i)-Zeit(t)-Gesetz (i-i0) = const. gilt. Wegen der starken Abhängigkeit dieses Vorganges von pH-Wert des Elektrolyten und der Anwesenheit von Komplexbildnern wird zu dessen Erklärung die hyrolysebedingte Bildung einer zweiten Passivschicht vor geschlagen.Es wird angenommen, daß die Legierungen im „primärpassiven“ Zustand mit einer sehr dünnen Schicht belegt sind, die mit derjenigen des passiven Chroms vergleichbar ist und auf der sich bei der „sekundären“ Passivierung eine dickere zweite Schicht aufbaut die einer Eisenpassivschicht ähnelt.Im primärpassiven Gebiet werden die Legierungen auf der ganzen Fläche anodisch aufgelöst, während im sekundärpassiven Bereich starke Lochfraßbildung beobachtet wird.
    Additional Material: 21 Ill.
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  • 41
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 586-590 
    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
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  • 42
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 592-592 
    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
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  • 43
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 70-72 
    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
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  • 44
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 88-98 
    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
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  • 45
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 107-110 
    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
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  • 46
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 85-88 
    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 systematology of the corrosion of metals in soil (VI) Lead, zinc and aluminum coatingsThe results of the field tests carried out by the U.S. Bureau of Standards with metallic coatings in U.S. soils have been evaluated on the basis of the results obtained and published so far. It was found that the resistance of lead coatings on iron pipes depends on the duration of the test, on the pH value of the soil, and on the average annual rainfall. In this respect, it was possible to find simple relationships explaining the behaviour of „parkway cable“ in different U.S. soils. Similarly, it was possible to find a simple law governing the longterm corrosion behaviour of galvanized iron' pipes buried in the soil. Like the behaviour of metallic coatings in new electrolytes, the behaviour of metallic coatings in the soil can be illustrated by corrosion rate/pH diagrams. The resistance of dip and powder calorized iron pipes depends on the pH value of the soil, and on its airing.
    Notes: Die Ergebnisse der von US-Bureau of Standards mit metallischen Überzügen in USA-Böden durchgeführten Naturkorrosionsversuche wurden unter Zugrundelegung der bisher gewonnenen und bekanntgegebene Erkenntnisse ausgewertet. Dabie wurde festgestellt, daß die Widerstandsfähigkeit von Bleiüberzügen auf Eisenrohren von der Versuchsdauer, dem pH-Wert des Bodens und der durchschnittlichen jährlichen Regenmenge abhängt. Für das Verhalten von „parkway cable„ in verschiedenen USA-Böden konnten in dieser Hinsicht einfache Zusammenhänge gefunden werden. Verzinkte Eisenrohre ließen ebenfalls im Erdboden hinsichtlich ihres Korrosions-Dauerverhaltens eine einfache Gesetzmäßigkeit erkennen. Für das Verhalten der verschiedenen metallischen Überzüge im Erdreich können ähnlich wie für deren Verhalten im neuen Elektrolyten, Korrosionsgeschwindigkeits-pH-Diagramme entwickelt werden. Die Widerstandsfähigkeit von tauch- und pulverkalorisierten Eisenrohren hängt vom pH-Wert des Bodens und von dessen Belüftung ab.
    Additional Material: 10 Ill.
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  • 47
    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
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  • 48
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 202-203 
    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
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  • 49
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 205-205 
    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 Tab.
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  • 50
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), 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
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  • 51
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 209-215 
    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 malleable cast iron under the influence of corrosionWhite and black malleable cast iron is examined in regard to its behaviour in the presence of different inorganic and organic agents. The tests are designed for long-term laboratory observations and, in particular, for the determination of the corrosion behaviour under conditions which, as closely as possible, resemble those encountered in practice, Reactions to wet steam, combustion gases, etc. are discussed. The influence of pre-corrosion, e.g. caused by sulphuric acid, on tensile strength and strain is measured. In this connection, it has been possible to detect important relationships at the untreated and at the finished material. Particularly impressive is the relationship between fatigue impact strength and pre-corrosion, By way of comparison, measurements have also been carried out on grey cast iron, cast steel and steel. Finally, the influence of copper (up to about 3 per cent.) in different types of water is examined by a long-term test.
    Notes: Weißer und schwarzer Temperguß wird in seinem Verhalten gegen verschiedene anorganische und organische Agentien untersucht. Die Versuche sind auf Langzeit-Laborversuche, vor allem aber auf praxisnahes Korrosionsverhalten eingestellt. Auf das Verhalten von Naßdampf und Verbrennungsgasen u.a. wird eingegangen. Der Einfluß der Vorkorrosin z. B. durch Schwefelsäure, auf Zugfestigkeit und Dehnung wird gemessen. Dabei ließen sich am unbearbeiteten und bearbeiteten Werkstoff wichtige Zusammenhänge ermitteln. Besonders eindrucksvoll ist der Zusammenhang zwischen Dauerschlagfestigkeit und Vorkorrosion. Vergleichs-weise werden Messungen an GG, GS und St gegenübergestellt. Zum Schluß wird der Einfluß von Kupfer (bis etwa 3%) in verschiedenen Wässern (Langzeitversuch) ermittelt.
    Additional Material: 5 Ill.
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 257-258 
    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
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  • 53
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 266-266 
    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
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  • 54
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 270-271 
    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
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  • 55
    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
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  • 56
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 273-277 
    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: Minimum contents of alloying constituents required for the formation of oxide layers with high protective effect against oxidation at higher temperaturesFor the formation of an uninterrupted protective oxide layer of an alloying metal such as Al or Be in Cu or Fe, the concentration must be at least so high that the quantity of alloying metal reaching the surface through diffusion is sufficient to provide for the formation of the oxide concerned. Results of tests concerning the oxidation of Cu-Be alloys have shown that this condition. Though necessary, is not sufficient. Even with higher concentrations of the alloying metal, both the latter and the base metal can be oxidized simultaneously if the base metal oxide contains mobile oxygen ions, or if there is, between a compact oxide layer of the base metal and the initial alloy, a porous zone composed of the oxides of both metals, with migration of oxygen molecules in pores. In the same way, it is possible to interpret the results of tests carried out by other authors concerning the oxidation of Cu-Zn and Cu-Ni alloys and the sulphidization of Cu-Al, Cu-Zn and Ag-Zn alloys
    Notes: Für die Bildung einer lückenlosen schützenden Oxydschicht eines Zusatzmetalls wie Aluminium oder Beryllium in Kupfer oder Eisen muß dessen Konzentration mindestens so hoch sein, daß die durch Diffusion an die Oberfläche gelangende Menge des Zusatzmetalls den Verbrauch Diffusion an die Oberfläche gelangende Menge des Zusatzmetalls den Verbrauch für alleinige Bildung des betreffenden Oxyds deckt. An Hand von Versuchsergebnissen für die Oxydation von Cu-Be-Legierungen wird gezeigt, daß die Bedingung zwar notwendig aber nicht hinreichend ist. Auch bei höheren Konzentrationen an Zusatzmetall können Grundmetall und Zusatzmetall simultan oxydiert werden, wenn entweder im Oxyd des Grundmetalls Sauerstoffionen beweglich sind oder zwischen einer kompakten Oxydschicht des Grundmetalls und er Ausgangslegierung eine poröse Zone der Oxyde beider Metalle mit Wanderung von Sauerstoffmolekeln in Poren vorhanden ist. In gleicher Weise können Versuchsergebnisse anderer Autoren für die Oxydation von Cu-Zn udn Cu-Ni-Legierungen und für die Sulfidierung von Cu-Al, cu-Zn und Ag-Zn-Legierungen gedeutet werden.
    Additional Material: 6 Ill.
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  • 57
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 288-295 
    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: A contribution to the question of the mechanism governing the formation of anodically generated hard oxide layersThe authors have investigated the mechanism governing the formation of hard oxide layers generated under different formation condition by means of a modified GS method at temperatures between - 1 and + 1°C. With the aid of numerous structure exposures, obtained with the ordinary microscope or with the electronic microscope and reproduced here, it is demonstrated in a visual manner that the course of the formation of the hard oxide layer can be sub-divided, from a morphological point of view, into four characteristic periods which, depending on the working conditions, follow each other successively and provide a good explanation for the formation of the layer.
    Notes: Verfasser untersuchten den mechanismus der Bildung von hartoxydschichten, die nach einem modifizierten GS-Verfahren bei Temperaturen zwischen - 1 und + 1°C unter verschiedenen Bildungs-bedingungen erzeugt wurden. An Hand von zahlreichen, wiedergegebenen, licht- und elektronenmikroskopischen Strukturaufnahmen wird sinnfällig gezeigt, daß der Ablauf der Hartoxydschichtbildung in morphologischer Hinsicht in vier charakteristische, je nach den Arbeitsbedingungen kontinuierlich aufeinanderfolgende, die Schichtbildung gut erklärende Perioden unterteilt werden kann.
    Additional Material: 19 Ill.
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 16-18 
    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: 6 Ill.
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  • 59
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 20-20 
    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
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  • 60
    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
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  • 61
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 350-352 
    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
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  • 62
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961) 
    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
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  • 63
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 73-80 
    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
    Description / Table of Contents: The kinetics of pit corrosion of passive chrome-nickel steelsCases of pit corrosion caused by chlorine ions have been investigated on six different Cr-Ni steels in a buffer solution containing Fe(II)-Fe(III). On the strength of measurements of the potential and impedance of the electrode, a thesis has been developed regarding the kinetics of pit corrosion. Potentiostatic measurements carried out in electrolytes not containing a redox system showed that pit corrosion occurs within a certain range of potentials only. In contrast to electrolytes without nitrate, this range of potentials is limited on the positive side in the presence of nitrate ions. The pit density (which does not vary with the time), the induction period, and the quasi-stationary corrosion current density are functions of the potential which, in electrolytes without nitrate, have a monotonous alignment and, in electrolytes containing nitrate, run symmetrically to the limit potentials and pass through an extreme value. Beyond the limit potential, the corrosion current density and the number of pits increase whilst the induction period decreases. Apart from certain transient phenomena in the vicinity of the limit potential, the corrosion current increases with the second power of the time. As the factor of this function of time depends on the potential, one obtains an anodic inclination which agrees with the results of the measurements carried out in the redox buffer solution. The experimental results can be interpreted by assuming a chemisorption process as a starting reaction. As regards the stable coexistence of active and passive zones in connection with the „all-or-nothing“ law of passivity, a resistance polarisation is assumed as well as a concentration of hydrochloric acid in the pits.
    Notes: Die durch Chlorionen verursachte Lochfraßkorrosion wurde an sechs verschiedenen Cr-Ni-Stählen in einem Fe(II)-FE (III)-Redoxpuffer untersucht. Durch Messen des Elektrodenpotentials und der Elektrodenimpedanz wurden Vorstellungen über die Kinetik der Lochfraßkorrosion entwickelt. Potentionstatische Messungen in redoxsystemfreien Elektrolyten zeigten, daß die Lochfraßkorrosion nur in einem bestimmten Potentialbereich auftritt. Anders als in nitratfreien Elektrolyten ist dieser Potentialbereich in Gegenwart von Nitrationen zu positiven Potentialen hin begrenzt. Die zeitlich konstante Lochzahldichte, eine Induktionszeit und ein quasistationäre Korrosionsstromdichte sind potentialabhängige Funktionen, die in nitratfreien Elektrolyten symmetrisch zu den Grenzpotentialen unter Ausbildung eines Extremwertes verlaufen. Und zwar nimmt beim Überschreiten der Grenzpotentiale die Lochzahl und der Korrosionsstrom zu und die Induktionszeit ab. Abgesehen von einigen Übergangserscheinungen in der Näher der Grenzpotentiale steigt der Korrosionsstrom mit dem Quadrat der Zeit an. Die Potentialabhängigkeit des Faktors dieser Zeitfunktion führt zu einer anodischen Tafelneigung, die mit den Messungen im Redoxpuffer übereinstimmt. Die experimentellen Ergebnisse lassen sich durch Annahme einer Chemisorption als Startreaktion deuten. Zur Frage der stabilen Koexistenz aktiver und passiver Bereiche im Zusammenhang mit dem „Alles-oder-Nichts“ -Gesetz der Passivität wird sowohl eine Widerstandspolarisation als auch eine Salzsäureanreicherung in den Löchern angenommen.
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 112-115 
    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
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 132-138 
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    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: 3 Ill.
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961) 
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    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
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 469-470 
    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
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 472-472 
    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
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  • 72
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 162-172 
    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
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  • 73
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 141-148 
    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: Nitric acid corrosion on highly alloyed steelsCorrosion tests in nitric acid up to 67 per cent. and at temperatures up to atmospheric boiling point have been carried out with steels of high chromium contents (25 to 30 per cent.) containing up to 1.64 per cent. carbon and, in some cases, also 20 per cent. nickel. The results were plotted in the form of iso-corrosion diagrams which can be used to predict the corrosion resistance was shown by a steel containing 0.1 per cent. C, 30 per cent. Cr, and 20 per cent. Ni. Even after heat treatment at 680° C, this steel does not show any intercrystalline corrosion when exposed to 50 and 67 per cent. nitric acid at boiling temperature.The results of these tests and the values for chromium steels discussed in the first part of the article were plotted, for HNO3 concentrations ranging from 30 to 67 per cent., at boiling temperature, to show the degree of corrosion on a logarithmic scale, as a function of the C and Cr contents on a decimal scale. The curves thus plotted were straight lines, i.e. the influence of carbon as well as chromium can be expressed by parabolas, rising with the concentration in the case of carbon, and falling with the concentration in the case of chromium. In the latter case, the part bonded with the carbon, which roughly corresponds to carbide (Cr3C) and amounts to 13 times the C content, must be deducted from the total chromium content.The high No content of 20 per cent. has no noticeable influence on the degree of corrosion. From a corrosion-chemical point of view, it is therefore immaterial whether the structure is of the ferrite or austenite type. The essential constituent is the free Cr content, the effect of which is governed by a parabolic law, and not by the previously much discussed n/8 Mol law.In plotting the effect of the carbon, one obtains three parabols which apply to the Cr contents of 13, 17 und 25 per cent., respectively. Below 0.1 per cent. C, the corrosion resistance is, in the main, exclusively governed by the Cr content.
    Notes: Mit hochchromhaltigen Stählen (25 bis 30% Cr) die Kohlenstoff bis zu 1,64% und teilweise auch 20% Ni enthielten, wurden zahlreiche Korrosionsversuche in Salpetersäure bis zu 67% und bei Temperaturen bis zu den atmosphärischen Siedetemperaturen durchgeführt. Aus den erhaltenen Zahlen wurden Beständigkeitsdiagramme mit Isokorrosionslininien gezeichnet, aus denen sich die Korrosionsbeständigkeit unter bestimmten Bedingungen für die einzelnen Stähle ablesen läßt. Am korrosionsbeständigsten erwies sich ein Stahl, der bei 0,1% C, 30 % Cr und 20% Ni enthielt. Dieser Stahl bekam auch nach einer thermischen Behandlung bei 680°C keine interkristalline Korrosion durch Salpetersäure 50% und 67% bei Siede-temperatur.Aus den Resultaten dieser Versuche und den Werten für Cr-Stähle aus dem ersten Teil der Arbeit wurde für Konzentrationen von 30 bis 67% HNO3 bei Siede-temperatur der Zusammenhang der Korrosion in logarithmischem Maßstab mit dem C-Gehalt im Dezimalmaßstab graphisch dargestellt. Esergaben sich gerade Linien, d, h, der Einfluß sowohl des Kohlenstoffes als auch des Chroms wurde durch je eine Parabel aus-gedrückt, für den Kohlenstoff mit der Konzentration steigend, für Chrom mit der Konzentration fallend. Beim Chrom ist vom Gesamtgehalt der an kohlenstoffgebundene Anteil abzuziehen, der etwa dem Carbid Cr3C entspricht und mit 13 × %C zu berechnen ist.Der hohe Ni-Gehalt von 20% hat auf die Höhe der Korrosion keinen merklichen Einfluß, und hieraus ergibt sich, daß es korrosionschemisch ohne Bedeutung ist, ob Ferrit oder Austenit im Gefüge vorliegt. Der wesentliche Bestandteil ist der ungebundene Cr-Gehalt, der nach einem parabolischen Gesetz wirksam wird, aber nicht nach dem früher viel diskutierten n/8 Mol-Gesetz.Bei der graphischen Darstellung des Einflusses des Kohlenstoffes ergaben sich drei Parabeln, die für die Cr-Gehalte 13%, 17% und 25% gelten. Unter 0,1% C ist für die Korrosionsbeständigkeit im wesentlichen nur noch der Cr-Gehalt entscheidend.
    Additional Material: 27 Ill.
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  • 74
    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
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  • 75
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 198-198 
    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
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  • 76
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 199-199 
    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
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  • 77
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 203-204 
    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
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  • 78
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 533-543 
    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: Silicones  -  High-quality materials and auxiliaries for the engineerIn the silicone oils, hot and cold vulcanisable silicone rubber types, silicone fats and silicone resins, silicone chemistry has created materials distinguished by exceptional properties. The article describes certain recent developments such as the creation of oil types with extreme heat resistance; the visco-elastic behavior of high-molecular dimethylpolysiloxanes; improved processing methods and quality in the sphere of hot vulcanisable silicone rubber types; applications of cold vulcanisable silicone rubbers; and silicone resin varnishings which are particularly important from a corrosion protection point of view. With the aid of silicone films of minute thickness, it is possible, generally without modification to the character of the material water-repellant, and adhesive to adhesive agents. As os demonstrated by recent examples, silicones have thereby become variegated and valuable aids in engineering technology, especially in the sphere of surface protection and surface improvement.
    Notes: Die Siliconchemie hat in den Siliconölen heiß- und kalt vulkanisierbaren Siliconkautschuktypen, siliconfetten und Siliconkautschuktypen, Siliconfetten und Siliconharzen Werkstoffe mit außergewöhnlichen eigenschaften geschaffen. Es werden jüngere Entwicklungen geschildert so Öltypen extremer Wärmebeständigkeit das viskoelastiche Verhalten hochmolekularer Dimethylpolysilozane, Verarbeitungs- und Qualitätsfortschritte auf dem Gebiete der heißvulkanisierbaren Siliconkautschuktypen, Anwendungsmöglichkeiten des kaltvulkanisierbaren Siliconkautschuks sowie die vom Standpunkt des Korrosionsschutzes besonders interessierenden Lackierungen mit Siliconharzen. Dünnste Siliconfilme vermögen, im allgemeinen ohne Veränderung des Werkstoffcharakters, Werkstoffoberflächen Wasserabweisung und Adhäsivität gegenüber klebenden Materialien zu verleihen. Diese Eigenschaften machen sie, wie an neueren Beispielen dargetan wird, zu vielseitigen, wertvollen Hilfsmitteln der Ingenieurtechnik in Fragen des Oberflächenschutzes und der Oberflächenveredlung.
    Additional Material: 7 Ill.
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 576-581 
    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
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 591-592 
    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
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 592-592 
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    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
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  • 82
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 595-596 
    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
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 652-665 
    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
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  • 84
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 619-627 
    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
    Description / Table of Contents: Corrosion protection by means of paintsThe degree of protection afforded to metal surfaces such as iron or aluminium by coats of paints, i. e., organic protective coatings, is largely governed by three factors: the metal surface acting as a boundary layer; the boundary layers between the different coats of paint; and the top surface of the paint system, i. e. the boundary layer between point and air. These boundary layers are here subjected to closer scrutiny, and special attention is drawn to the importance of the boundary layers as regards the preparation and pre-treatment of the base, the application of the different protective coatings, and the service life required from them. The problems of the thickness of the coatings and their freedom from porosity are discussed, and brief reference is made to the importance of pigment volume concentration. The informative value of the sections dealing with boundary layers is enhanced by references to the influence of the structural design, to the correct preparation and pretreatment of bases, to the economic aspects, to the most suitable ways and means of applying the coatings and, finally, to the influence of the surroundings. The sections dealing with the structure and system of coats of paints and the discussion of the solution of difficult problems of corrosion protection by means of organic coatings convey an idea of the practical application of the coating nowadays available for corrosion protection. In conclusion, the author discusses the notions „metal-bare“ and „metal-pure“.
    Notes: Die Sicherung von Metalloberflächen wie z. B. Eisen oder Aluminum durch Anstrichschichten, d. h. organische Schutzschichten, wird im wesentlichen von 3 Komponenten: der Metalloberfläche als Grenzschicht, den Grenzschichten zwischen den einzelnen Anstrichschichten und der Anstrichoberfläche, d. h. der Grenzfläche Anstrich/Luft mitbestimmt. Diese Grenzschichten werden einer näheren Betrachtung unterworfen und auf die Bedeutung der Grenzschichten in bezug auf Vorbereitung und Vorbehandlung des Untergrundes, auf die Aufbringung der einzelnen Schichten und die Lebensanforderungen, die an die Schutzschichten gestellt werden, wird hingewiesen. Die Probleme der Schichtdicke und Porenfreiheit von Schutzschichten werden besprochen und die Bedeutung der Pigmentvolumenkonzentration kurz erläutert; Hinweise auf den Einfluß der Konstruktion eines Bauwerkes, auf das richtige Vorbereiten und Vorbehandeln von Untergründen, auf die größte Wirtschaftlichkeit, auf zweckmäßige Aufbringung und Aufbringungsmethoden und endlich auf die Einwirkung der Umwelt sollen den Aussagewert der Abschnitte über die Grenzflächen noch vertiefen. Die Abschnitte über Anstrichaufbau und -systeme sowie die Erläuterungen zur Lösung schwieriger Korrosionsschutzprobleme durch organische Schutzschichten geben einen Ausblick auf die praktische Anwendung der heute verfügbaren Anstrichmittel im Korrosionsschutz. Als Abschluß wird zu den Begriffen metallisch blank oder metallisch rein Stellung genommen.
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 614-619 
    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 protection in the Lacq areaImportance of leakage currents caused by railway electrification (1500 Volt d.c.). Corrosion protection for the different lines of the power grid and supply network, production shafts and factories. Measures taken to obtain a uniform current distribution of the substations (polarised drainage; current removal).
    Notes: Bedeutung der vagabundierenden Ströme, eine Folge der Elektrifizierung der Eisenbahnlinien (1500 Volt Gleichspannung). Korrosionsschutz der verschiedenen Leitungen des Sammel- und Versorgungsnetzes, der Produktionsschächte und Fabrikanlagen. Maßnahmen zur Erzielung einer gleichmäßigen Stromverteilung der Unterstationen (polarisierter Drainage, Strombeseitigung).
    Additional Material: 6 Ill.
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 645-651 
    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
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  • 87
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    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 influence of alloying admixtures on the corrosion behaviour of titaniumMeasurements of potentials on welded titanium and titanium oxygen alloys have shown that, with increasing oxygen content of the weld or alloy, the potential is shifted to the electropositive side provided that the oxygen content does not exceed 0.6 per cent. This does not affect the corrosion rate of the titanium oxygen alloys. With higher oxygen contents, however, corrosion in boiling 2½ pC. sulphuric acid is increased. But as such corrosion is, in any case, already high, this fact is, in practice, without interest. Conditions are similar with titanium nitrogen alloys. The higher degree of corrosion here encountered with welded specimens could be ascribed to the effect of heat treatment which causes an inadmissibly high degree of corrosion even with non-welded specimens. Oxidizing solutions do not even attack titanium weld joints. By adding 0.2 pC or more Pd, the corrosion resistance in non-oxidizing media can be improved. With the aid of potential measurements and current potential curves, the corrosion behaviour of Ti Pd alloys is explained.
    Notes: Potentialmessungen an geschweißtem Titan und an Titan-sauerstoff-Legierungen zeigten mit zunehmendem Sauerstoffgehalt der Schweiße bzw. der Legierung eine Potentialveredlung, wenn der Sauerstoffgehalt 0,6% nicht übersteigt. Die Korrosionsgeschwindigkeit der Titan-Sauerstoff-Legierungen ändert sich hierdurch nicht. Höhere Sauerstoffgehalte dagegen bewirken i siedender 2,5%iger Schwefelsäure eine verstärkte Korrosion. Dies ist allerdings in Anbetracht des an sich schon hohen Angriffs für die Praxis ohne belang. Ähnlich liegen die Verhältnisse bei Titan-Stickstoff-Legierungen. Die auftretende verstärkte Korrosion bei geschweißten Proben konnte auf einen Einfluß der Wärmebehandlung zurückgeführt werden, die auch bei ungeschweißten Proben einen unzulässig starken Angriff hervorrufen. Oxydierende Lösungen greifen auch Titan-Schweißnähte nicht an. Durch einen Zusatz von 0,2% und mehr Pd kann die Korrosionsbeständigkeit in nicht oxydierenden Medien verbessert werden. An Hand von Potentialmessungen und Stromspannungskurven wird das Korrosionsverhalten der TiPd-Legierungen erklärt.
    Additional Material: 15 Ill.
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 666-666 
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    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
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 713-720 
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    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
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 721-727 
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    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
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 728-728 
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    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
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  • 92
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    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
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 728-730 
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    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
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 728-728 
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    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
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961) 
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    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
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    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 747-747 
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    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: Progress and experience in the use of corrosion-resistant steels.  -  The question fo stabilizing ferritic 17% chrome steels against intercrystalline corrosionThis postscript to the article “progress and experience in the use of corrosion-resistant steels” is confined to some supplementary data concerning (corrosion-resistant) ferritic 17% chrome steels in regard to the proneness of the non-annealed welds to intercrystalline corrosion. Such proneness can be countered through stabilisation with special carbide agents, viz. titanium as well as niobium admixtures. In selecting the magnitude of these admixtures  -  greater with niobium than with titanium  -  it is in any case necessary to take the carbon and nitrogen contents into accounts.Niobium admixtures have certain advantages in the production of rolling band which is widely used, e. g. for household machines.Reference is made to the possibilities of testing the resistance to intercrystalline corrosion (indifference to grain desintegration).
    Notes: Dieser Nachtrag zu dem Aufsatz „Fortschritte und Erfahrungen in der Anwendung korrosionsbeständiger Stähle“ beschränkt sich auf ergänzende Angaben über (korrosionsbeständige) ferritische 17%ige Chromstähle und zwar in Bezug auf die Anfälligkeit von nicht nachgeglühten Schweißnähten gegen interkristalline Korrosion. Die Bekämpfung dieser Anfälligkeit gelingt durch Stabilisierung mit Sondercarbidbildnern und zwar sowohl mit Titan- als auch mit Niob- Zusätzen. Die Höhe der Gehalte, die bei Niob größer ist als bei Titan, muß in jedem Fall den Kohlenstoff- und den Stickstoffgehalt berücksichtigen.Niobzusätze bringen für die Herstellung von Walzband, das z. B. für Haushaltmaschinen weitgehend verwendet wird, Vorteile.Auf die Prüfmöglichkeiten zum Nachweis der Beständigkeit gegen interkristalline Korrosion (oder: die Kornzerfallsunempfindlichkeit) wird hingewiesen.
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    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 resistance of nickel and nickel alloys, and the influence of further alloying matterNickel has excellent mechanical and corrosion-chemical properties and is therefore well suited for technical application, both non-alloyed or slightly alloyed, and in alloys consisting of two or more metals. Subsidiary constituents of nickel, such as carbon or minor admixtures (Mn, Mg or Al) have comparatively little influence on its corrosion properties. In contrast, alloying admixtures such as copper, chrome, iron or molybdenum have a decisive influence on the durability of nickel so that, depending on the alloying element, alloys with special corrosion-chemical properties are obtained which can be selected for different corrosives such as caustic alkali, diluted acids, strong acids (HCl, H2SO4 HNO3 HF) or chlorine gas, and for high oxidation risks.The influence of the different alloying metals, as a function of the alloying percentage, is discussed in greater detail for two-metal systems. With each individual system, there are certain ranges where their properties are optimal. Moreover, alloying admixtures may also serve to develop passive properties (e.g. in systems containing chrome) or to promote the tendency to form protective layers, or to stabilize protective layers already forming. Such influence is, for instance, exerted by iron, manganese or aluminium in the copper-nickel system. The relationships are shown in the form of diagrams, as far as these are known.
    Notes: Nickel hat hervorragende mechanische und korrosionschemische Eigenschaften, die es sowohl unlegiert bzw. Schwach legiert als auch in seinen Zwei- und Mehrstofflegierungen für technologische Zwecke geeignet machen. Die Nebenbestandteile im Nickel, wie Kohlenstoff, und geringe Zusätze (Mn, Mg und Al), verändern die Korrosionseigenschaften des Nickels verhältnismäßig wenig. Legierungszusätze wie Kupfer, Chrom, Eisen und Molybdän verändern dagegen die Beständigkeit des Nickels entscheidend, so daß je nach Element Legierungen mit besonderen korrosionschemischen Eigenschaften entstehen, die für die verschiedenartigen Beanspruchungen durch Ätzalkali, verdünnte Säuren, starke Säuren (HCL, H2SO4, HNO3, HF), Chlorgas und oxydierende Bedingungen gewählt werden können.Der Einfluß der verschiedenen Legierungsmetalle wird an den Zweistoffsystemen mit Kupfer, Chrom, Eisen, Molybdän bzw. an Dreistoffsystemen in Abhängigkeit vom Legierungsanteil näher gezeigt. In den einzelnen Systemen bestehen Bereiche mit optimalen Eigenschaften. Weiter können Zusätze dazu dienen, passive Eigenschaften zu entwickeln (z. B. in Systemen mit Chrom) oder auch die Neigung zur Schutzschichtbildung zu fördern bzw. sich bildende Schutzschichten stabiler zu machen. Von Einfluß in diesem Sinne sind z. B. Eisen, mangan oder Aluminium im System Kupfer/Nickel. die Zusammenhänge werden in Diagrammen, soweit diese bekannt sind, dargestellt.
    Additional Material: 16 Ill.
    Type of Medium: Electronic Resource
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  • 98
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 752-758 
    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 importance of layer thickness in corrosion protection coatingsThe protective value of coatings is decisively governed by the layer thickness. This applies to active as well as passive anti-corrosive coatings.The layer thickness has a bearing on the factors important to corrosion protection, such as adhesion, hardness and elasticity, porosity, durability, and corrosion protection effect.Contrary to earlier assumptions, the layer thickness required for optimum protection cannot be determined from the depth of roughness of the coating base alone. What is decisive is the ratio of depth and width of roughness.The layer thickness that can be achieved with a given coating compound depends on the type of this compound, on the application technique used, and on the processing.Of particular importance is the measuring of the layer thickness, and a description is given of the methods most commonly used.On the basis of the investigations carried out by R. pierce, it is shown that corrosion protection can only become possible with a dry layer thickness exceeding 125 micron.
    Notes: Von ausschlaggebender Bedeutung für den Schutzwert eines Anstriches ist die Schichtdicke. Dies gilt für die aktiven und passiven Korrosionsschutzanstrichsysteme.Die Schichtdicke beeinflußt die für den Korrosionsschutz wichtigen Faktoren wie Haftung, Härte und Elastizität, Porigkeit, Beständigkeit und Korrosionsschutzwirkung.Die für einen optimalen Schutz erforderliche Schichtdicke läßt sich nicht, wie bisher angenommen, allein aus der Rauhtiefe des Anstrichuntergrundes ableiten. Vielmehr ist das Verhältnis Rauhtiefe zu Rauhbreite entscheidend.Die mit einem Anstrichmittel erreichbare Schichtdicke ist bedingt durch den Typ des Anstrichmittels, der Art der Anstrichtechnik, der Verarbeitung.Von besonderer Bedeutung ist die Messung der Schichtdicke. Die gebräuchlichsten Verfahren werden aufgeführt.An Hand der Untersuchungen von R. Pierce wird gezeigt, daß korrosionsschutz erst oberhalb einer Trockenschichtdicke von 125 μ möglich ist.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 99
    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: Cleaning and Sanitation of tanksIn recent years, cleaning and sanitation of milk tanks by spraying methods have assumed greater importance. In this connection, the question arises whether the spraying methods might expose the tank construction materials to corrosion risks. With the spraying chambers conventionally used for corrosion tests, the solutions are deliberately sprayed into the air, and not directly on the specimens of material. For an assessment of the corrosivity of sprayed solutions, it was therefore necessary to develop an apparatus which permits the direct spraying of the solution on to the test plates. Design and operation of this plant are described in detail.
    Notes: Die Reinigung und Desinfektion von Milchtanks mittels Sprühverfahrens haben in den vergangenen Jahren Bedeutung gewonnen. Im Zusammenhang damit taucht die Frage auf, ob die Sprühverfahren mit Korrosionsgefahren für die im Tankbau eingesetzten Werkstoffe verbunden sein können. Bei den bisher für Korrosionsversuche eingesetzten Sprühkammern werden die Lösungen absichtlich nur in den Luftraum, aber nicht auf die Materialproben direkt versprüht. Daher mußte für die Kontrolle des korrosiven Verhaltens versprühter Lösungen eine Apparatur entwickelt werden, welche es gestattet, die Lösung unmittelbar auf die Prüfbleche zu sprühen. Aufbau und Arbeitsweise der Anlage sind eingehend beschrieben.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 100
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 12 (1961), S. 773-785 
    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
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