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  • Articles: DFG German National Licenses  (17,329)
  • 1960-1964  (10,954)
  • 1950-1954  (4,216)
  • 1900-1904  (2,159)
  • General Chemistry  (9,105)
  • Polymer and Materials Science  (8,224)
  • Catalysis  (4)
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  • Articles: DFG German National Licenses  (17,329)
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  • 201
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 192-192 
    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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  • 202
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 192-192 
    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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  • 203
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 192-192 
    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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  • 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
    Type of Medium: Electronic Resource
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  • 205
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 193-193 
    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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  • 206
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 193-193 
    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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  • 207
    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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  • 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
    Type of Medium: Electronic Resource
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  • 209
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 194-199 
    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
    Additional Material: 3 Ill.
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  • 210
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 200-200 
    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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  • 211
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964) 
    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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  • 212
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 221-227 
    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 on the influence of household detergents on metals, and of metals on household detergents. Third communication Metallographical investigations on the corrosivity of aluminium bronzesIn the second communication, the behaviour of aluminium bronzes in four different detergents was investigated. The test results gave rise to the conclusion that the corrosion rate differs depending on the condition of the structure.The investigations were carried out with AlBz 9, Aeterna AF 50, AlMBz 10 and Aeterna W II A.By means of heat treatment, a defined α + β- and α + γ2 structure was obtained. These specimens were then boiled in detergents for different periods of time, and the surface was photographed with an enlargement of 100 or 500 times.It was found that the corrosion caused by detergents is similar to the corrosion caused by a 10 per cent. ammonium persulphate solution. The α + γ2 structure shows a somewhat higher corrosion resistance than the α + β structure.
    Notes: In der 2. Mitteilung wurde das Verhalten von Al-Bronzen in 4 verschiedenen Waschmitteln untersucht. Aus den Versuchsergebnissen konnte geschlossen werden, daß je nach Gefügezustand die Korrosionsgeschwindigkeit unterschiedlich groß ist. Untersucht wurden: AlBz 9, Aeterna AF 50, AlMBz 10 und Aeterna w II A.Durch Wärmebehandlung wurde definiertes α + β bzw. α + γ2-Gefüge erzielt. Diese Proben wurden dann in Waschmitteln verschiedene Zeiten gekocht und Oberflächenaufnahmen mit 100- und 500- facher Vergrößerung hergestellt.Es zeigte sich, daß der Ätzangriff durch Waschlaugen so verläuft wie der Ätzangriff durch 10%ige Ammoniumpersulfat-Lösung.Das α + γ2-Gefüge ist gegen den Waschmittelangriff etwas beständiger als das α + β-Gefüge.
    Additional Material: 38 Ill.
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  • 213
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 201-212 
    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: Control measurements on cathodically protected pipelinesThe most important control measurement for the cathodic protection of buried pipelines is the measurement of the pipel soil potential. On the strength of experimental and theoretical investigations, it is possible to indicate safe protection potentials at which the corrosion rate becomes practically insignificant. In applying the scientific results of electro-chemistry to cathodic protection in practice, problems may be encountered if phenomena are over-simplified or if local conditions are not sufficiently taken into account.Such practical problems are not so much concerned with measuring instruments and reference electrodes; they are more associated with the measuring methods subsequently described and with the fact that influence factors difficult to ascertain must be taken into account.The cathodic polarisation at the metal surface to be protected is composed of overtensions of a penetration and a diffusion type. In addition, there occurs a resistance polarisation which may be governed, on the one hand, by the ohmic voltage drop between pipe surface and reference electrode and, on the other hand, by poorly conducting coating or insulating layers. The latter usually cause, at the same time, a change in the diffusion type overtension. Since the resistance polarisation does not partake in the reaction kinetics, this influence must be eliminated in measuring the protection potential. Since the different types of polarisation have different type curves, it is possible to ascertain the separate partial reactions in accordance with the normal methods of electro-chemistry. By means of oscillographic recordings of potential/time curves, through calculation or with the aid of suitable measuring bridges, it is possible to eliminate the resistance polarisation or to determine the ohmic voltage drop in the electrolyte.
    Notes: Die wichtigste Kontrollmessung für den kathodischen Schutz erdverlegter Rohrleitungen ist die Messung des Rohr/Boden-Potentials. An Hand experimenteller und theoretischer Untersuchungen ist es möglich, sichere Schutzpotentiale anzugeben, bei denen die Korrosionsgeschwindigkeit praktisch bedeutungslos wird. Bei der Anwendung wissenschaftlicher Ergebnisse der Elektrochemie auf den kathodischen Schutz in der Praxis können Probleme auftreten, wenn Vorgänge zu stark vereinfacht und örtliche Gegebenheiten nicht genügend berücksichtigt werden.Solche praktischen Probleme liegen weniger bei Meßgeräten und Bezugselektroden, als bei den anschließend beschriebenen Meßverfahren und der Berücksichtigung schwer erfaßbarer Einflußgrößen. Die kathodische Polarisation an der Zu schützenden Metalloberfläche Setzt sich aus einer Durchtritts- und einer Diffusionsüberspannung zusammen. Ferner tritt eine Widerstandspolarisation auf, die einerseits durch den Ohmschen Spannungsabfall zwischen Rohroberfläche und Bezugselektrode, andererseits durch schlecht leitende Deck- oder Isolierschichten gegeben sein kann. Letztere verursachen meist gleichzeitig eine Änderung der Diffusionsüberspannung. Da die Widerstandspolarisation keinen Anteil an der Reaktionskinetik besitzt, muß ihr Einfluß bei der Schutzpotentialmessung eliminiert werden. Auf Grund eines zeitlich unterschiedlichen Verhaltens der Polarisationsarten gelingt die Aufspaltung der einzelnen Teilreaktionen nach den in der Elektrochemie üblichen Verfahren. Durch oszillographische Aufnahme won Potential-Zeitkurven, durch Rechnung oder mit geeigneten Meßbrücken kann die Widerstandspolarisation ausgeschaltet bzw. der Ohmsche Spannungsabfall im Elektrolyten ermittelt werden.
    Additional Material: 15 Ill.
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  • 214
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 237-237 
    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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  • 215
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 238-242 
    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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  • 216
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 243-251 
    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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  • 217
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 252-252 
    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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  • 218
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 253-260 
    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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  • 219
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 261-279 
    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
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  • 220
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 280-288 
    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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  • 221
    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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  • 222
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. XXXV 
    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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  • 223
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 971-972 
    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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  • 224
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 289-289 
    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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  • 225
    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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  • 226
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 289-291 
    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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  • 227
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 1000-1007 
    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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  • 228
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 1008-1009 
    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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  • 229
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 995-1000 
    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: New duroplastic coating materials for extreme thermal and chemical conditionsUp to now, the permeability to water vapour of organic coating materials such as duroplastics, thermoplastics and elastomers has given rise, within the condensation phase zone, to considerable destruction, beginning with more or less pronounced blister formation.The application of organic coating materials has therefore been confined to those spheres where nonaqueous media or a negative heat differential are encountered, i.e. where the temperature of the base material to be coated is higher than that of the aqueous medium on the coated side. If the heat differential is in the opposite direction, the water vapour will, because of the prevailing partial pressure, permeate the organic coating and irreversibly condense on the metal base.To eliminate these consequences and to obtain a permanent protection, the types named have been developed. These are absolutely proof to water vapour diffusion and remain, with any temperature differential, within their thermal capacity without causing damage in the form of blisters.In the present article, this development and the practical applications are described on the basis of results obtained in industrial practice.
    Notes: Die Tatsache der Wasserdampfdurchlässigkeit von organischen Beschichtungswerkstoffen, wie Duroplasten, Thermoplasten und Elastomeren führte bisher im Bereich der Kondensationsphase zu erheblichen Zerstörungen, beginnend mit mehr oder weniger starker Blasenbildung.Der Einsatz von organischen Beschichtungswerkstoffen blieb deshalb auf jene Anwendungsgebiete beschränkt, wo nichtwäßrige Medien oder ein negatives Wärmegefälle vorliegt, d. h., wenn die Temperatur des beschichteten Grundwerkstoffes höher ist als die des wäßrigen Mediums auf der beschichteten Seite. Verläuft das Wärmegefälle in entgegen gesetztem Sinne, so durchwandert der Wasserdampf auf Grund des vorherrschenden Partialdruckes die organische Beschichtung und kondensiert irreversibel auf dem metallischen Untergrund.Um diese Folgeerscheinungen auszuschalten und eine dauerhafte Schutzwirkung zu erzielen, wurden die Typen entwickelt. Diese sind absolut wasserdampf-diffusionsfest und bleiben bei jedem Temperaturgefälle innerhalb ihrer thermischen Belastbarkeit ohne Schäden in Form von Blasenbildung.Die vorliegende Arbeit beschreibt diese Entwicklung und die praktische Nutzanwendung an Hand ermittelter Ergebnisse in industriellen Einsatz.
    Additional Material: 11 Ill.
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  • 230
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 1038-1046 
    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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  • 231
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 1051-1052 
    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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  • 232
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 1062-1068 
    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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  • 233
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 1068-1068 
    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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  • 234
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 1068-1068 
    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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  • 235
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 573-577 
    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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  • 236
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 555-562 
    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 behaviour of lead and lead alloys in sulphuric acid solutionsLong-time corrosion tests have been carried out in sulphuric acid solutions of different concentration (up to 70 per cent.) and at different temperatures (up to boiling point), using specimens of fine lead, copper fine lead and different types of hard lead. The only noticeable, and noticeably different, corrosion rates were encountered at temperatures above 100% c.In the medium 'and high concentration range, fine lead and, to a lesser extent, even copper fine lead were increasingly affected by corrosion; in agreement with published data, the corrosion values especially of fine lead showed a marked scatter and some of them were extremely high. Hard lead with 1.5 to 6 percent. antimony was less affected by the highly concentrated acids; but low-alloyed hard lead, showed, a maximum corrosion, rate in diluted acid. The comparatively highest resistance was shown by hard lead with 6 percent. antimony which showed noticeable corrosion under the influence of the strongest acid only (70 percent. H2SO4). A particularly high resistance in this acid was shown by a copper hard lead (0.6 percent antimony).Boiling tests on a minor technical scale with steel pots with homogeneous internal lead coating revealed a surprisingly high corrosion resistance of the lead coating, which consisted of copper lead, even in 70 percent acid heated to 150° C; such resistance was not to be expected from the preceding tests and exceeded that encountered with hard lead (6 percnt. SB) A chemical analysis showed that copper lead coating must, during manufacture, have absorbed tin, and subsequent tests showed that a small admixture of tin results in quite a considerable increase in the corrosion resistance of the copper lead. An increased copper content, too, had a favourable effect but only in the strongest acid.Finally, a number of tests were carried out in order to ascertain the influence, on the corrosion performance of some types of lead, of an admixture of nitric acid to the sulphuric acid (70 percent.). In all cases, the admixture had the effect of reducing the corrosion rate, especially with copper lead.The conclusions to be drawn from the test results in regard to corrosion tests and work practice are discussed.
    Notes: Langzeit-Korrosionsversuche wurden in Schwefelsäurelösungen verschiedener Konzentration (bis 70 %) und Temperatur (bis Siedepunkt) an Proben aus Feinblei, Kupferfeinblei und verschiedenen Hartbleisorten durchgeführt. Dabei ergaben sich merkliche und unterschiedlich große Korrosionsgeschwindigkeiten nur bei Temperaturen oberhalb 100° C.Feinblei und in geringerem Maß auch Kupferfeinblei wurden im mittleren und höheren Konzentrationsbereich zunehmend stärker korrodiert, wobei  -  in Übereinstimmung mit Literaturangaben  -  namentlich bei Feinblei stark streuende und z. T. außerordentlich hohe Korrosionswerte erhalten wurden. Hartblei mit 1,5 bis 6 % Sb wurde von den stärkeren Säuren weniger angegriffen, dagegen zeigte niedriglegiertes Hartblei ein Korrosionsmaximum in verdünnter Säure. Verhältnismäßig am beständigsten erwies sich Hartblei mit 6% Sb, das nur in der stärksten Säure (70 % H2SO4)merklich korrodiert wurde. In dieser war ein CU-Hartblei (0,6 % Sb) besonders beständig.Kleintechnische Kochversuche an innen homogenverbleiten Stahltöpfen ergaben ein überraschend gutes Korrosionsverhalten der aus Kupferblei bestehenden Verbleiung auch in 15O° C heißer 70°/oiger Säure das nach den vorhergehenden Versuchen nicht zu erwarten war und dasjenige der mit Hartblei (6% Sb) ausgekleideten Töpfe übertraf. Durch Analysen wurde festgestellt, daß die Kupferverbleiung offenbar bei der Herstellung Zinn aufgenommen hatte, und durch Versuche wurde gezeigt, daß ein geringer Zinngehalt die Beständigkeit des Kupferbleis ganz beträchtlich verbessert. Auch ein erhöhter Cu-Gehalt wirkte sich günstig aus, jedoch nur in der stärksten Säure.Schließlich wurde in einigen Versuchen der Einfluß eines Salpetersäurezusatzes zur Schwefelsäure (70%) auf das Korrosionsverhalten einiger Bleisorten geprüft. In allen Fällen verminderte er die Korrosion, besonders stark bei Kupferblei.Die aus den Versuchsergebnissen sich ergebenden Folgerungen für die Korrosionsprüfung und Betriebspraxis werden erörtert.
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 333-335 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. XXXVIII 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 616-616 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 617-617 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 348-355 
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    Additional Material: 13 Ill.
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 356-356 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 793-796 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 397-401 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 405-407 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 402-404 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 379-390 
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    Description / Table of Contents: Electro-chemical characteristics of atmospheric corrosionOn the strength of published data, some essential characteristics of atmospheric corrosion are investigated, First, the part played by water adsorption is discussed and the influence on the emergence of corrosive electrolytes of impurities in the air and on the metal surface explained. On the basis of the electrode-kinetic conditions, the author then deals - especially for iron and steel, but with some comments on copper and zinc - with the mechanism and stages which govern the corrosion rate of uniform corrosion consisting of hydrogen segregation, oxygen reduction, and sulphur dioxide reduction. In connection with the question of non-uniform corrosion, especially of those metals affected by oxide films, the conditions for the appearance of the different types of differential aeration cells are discussed.
    Notes: An Hand von Literaturangaben werden einige wesentliche Merkmale der atmosphärischen Korrosion untersucht. Es wird zunächst die mögliche Rolle der Wasseradsorption diskutiert und der Einfluß von Verunreinigungen der Luft und der Metalloberfläche auf das Auftreten angreifender Elektrolyte dargelegt. An Hand der elektrodenkinetischen Grundlagen wird speziell für Eisen und Stahl, mit Anmerkungen zu Kupfer und Zink, der Mechanismus und der geschwindigkeitsbestimmende Schritt der gleichmäßgen Korrosion mit Wasserstoffabscheidung, Sauerstoffreduktion und Schwefeldioxydreduktion diskutiert. Im Zusammenhang mit der Frage der ungleichmäßigen Korrosion insbesondere der mit Oxydfilmen behafteten Metalle werden die Bedingungen für das Zustandekommen der verschiedenen Typen von Belüftungselementen dargelegt.
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 408-409 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 410-412 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 426-426 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 855-855 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 863-870 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. XXXII 
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 889-894 
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    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Corrosion on multi-phase systems as well as on rough surfaces with predetermined polarisationFor an arbitrarily assumed polarisation, a simple graphic method is indicated for the determination of the potential and current densities at the local element boundary of multi-phase electrodes with and without counter-electrode. It is shown that, in the presence of a counter-electrode, the current density must not be regarded as the superposition of separate partial current densities. The influence surface roughness on linear-polarised, otherwise smooth electrodes is calculated with the aid of a simple model.
    Notes: Es wird bei willkürlich vorgegebener Polarisation eine einfache, graphische Methode angegeben zur Bestimmung von Potential und Stromdichten an der Lokalelementgrenze mehrphasiger Elektroden mit und Gegenelektrode. Dabei wird gezeigt, daß die Stromdichte in Gegenwart einer Gegenelektrode nicht als Superposition eigenständiger Teilstromdichten aufzufassen ist. Der Einfluß der Oberflächenrauhigkeit an linear polarisierten, sonst ebenen Elektroden, wird an einem einfachen Modell berechnet.
    Additional Material: 11 Ill.
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 894-901 
    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: Metal spraying: From the gas burner to the plasma beamThe technology of metal spraying is simple; it is metallurgically interesting, and has an important effect on finishing. It permits the application of material in the form of variable coatings, for corrosion protection, for repair purposes, or for embellishment. Metals as well as nonmetallic materials can be used in wire or powder form by means of rhe gas burner, the electric arc or the plasma beam. In each case, special equipment is required. The capacity limits of these methods, which normally consist in the drop-by-drop application of a liquefied substance in a carrier gas, usually compressed air, to a prepared base, must be observed.With increasing scientific knowledge, these processes have found more widespread application, also aided by new sources of energy.
    Notes: Die Technologie des Metallspritzens ist einfach, metallkundlich interessant und fertigungsmäßig wirksam. Sie erlaubt das Auftragen von Werkstoff in Form ab-wandlungsfähiger Überzüge, als Korrosionsschutz, zur Reparatur und zur Verschönerung. Metalle und Nichtmetalle sind durch die Gasflamme, den Lichtbogen oder den Plasmastrahl in Draht- oder in Pulverform verarbeitbar. Sondergeräte sind hierzu jeweils erforderlich. Die Leistungsgrenzen dieser Verfahren, die im Regelfalle darin bestehen, verflüssigte Substanz in einem Trägergas, meist Preßluft, auf eine vorbereitete Unterlage tropfenförmig aufzubringen, müssen eingehalten werden.Wissenschaftliche Erkenntnisse haben diesen Prozessen zu einer erweiterten Anwendung verholfen, wozu auch neue Energiequellen beitrugen.
    Additional Material: 20 Ill.
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  • 281
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 909-912 
    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: Influence of the lattice structure on the corrosion of an 18/10 chrome nickel steelAn 18/10 chrome nickel steel with low carbon content has been used for the examination of the corrosion-chemical behaviour of two phases with identical chemical composition but different lattice structure. Of the two structure components, austenite and martensite, the latter is subject to selective corrosion in the active zone. In the active/passive transition zone, in the passive zone, and in the transpassive zone, no difference in the behaviour of the two phases could be detected.The selective corrosion of the martensite may be ascribed to a shift in the anodic equilibrium potential of the metal dissolution and/or an increase in the exchange current density. It is likely that the high defect concentration of the martensite phase causes an increase in the exchange current density, thus favouring corrosion attack in the activation polarisation zone.
    Notes: Am Beispiel eines 18/10-Chrom-Nickel-Stahles mit niedrigem Kohlenstoffgehalt wurde das korrosions-chemische Verhalten zweier Phasen untersucht, die gleiche chemische Zusammensetzung, aber unterschiedliche Gitterstruktur aufweisen. Von den beiden Gefügekomponenten Austenit und Martensit erfährt der Martensit im Aktivbereich eine selektive Korrosion. Im Aktiv-Passiv-Übergang, im Passiv- und Transpassivgebiet wurde kein Unterschied im Verhalten beider Phasen gefunden.Eine Verschiebung des anodischen Gleichgewichtspotentials der Metallauflösung und/oder eine Erhöhung der Austauschstromdichte gegenüber dem Austenit können für die selektive Korrosion des Martensits verantwortlich gemacht werden. Wahrscheinlich bewirkt die hohe Fehlstellenkonzentration der martensitischen Phase eine Erhöhung der Austauschstromdichte und somit einen bevorzugten Angriff im Bereich der Aktivierungspolarisation.
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 913-914 
    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 resistance of technical material to lead oxide at high temperaturesThe resistance of materials to lead oxide is investigated. The temperatures range up to 1540°C. Among metallic materials, the performance of rhodium and iridium is described. Both metals are corroded by lead oxide but can be used for short-time tests. Among ceramic materials, the investigation covers zirconium dioxide, beryllium oxide, Spinell and magnesium oxide. Sintered crucibles of zirconium dioxide, beryllium oxide and Spinell are likewise attacked but are also suitable for short-time tests. Crucibles made from magnesium oxide monocrystals are not corroded, not even after prolonged exposure to boiling lead oxide.
    Notes: Es wird die Beständigkeit van Stoffen gegenüber Bleioxid untersucht. Die Temperaturen betragen bis zu 1540° C. Von den metallischen Werkstoffen wird das Verhalten von Rhodium und Iridium beschrieben. Beide Metalle werden angegriffen, sind aber Für kurzzeitige Versuche brauchbar. Von den keramischen Werkstoffen werden Zirkondioxid, Berylliumoxid, Spinell und Magnesiumoxid untersucht. Gesinterte Tiegel aus Zirkondioxid, Berylliumoxid und Spinell werden ebenfalls angegriffen, sind aber auch für kurzzeitige Versuche brauchbar. Tiegel aus Magnesimuoxideinkristallen werden selbst nach längerer Zeit durch siedendes Bleioxid nicht angegriffen.
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 690-695 
    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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  • 284
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 696-699 
    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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  • 285
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 728-740 
    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: Austenitic cast iron materials in the chemical and petroleum industriesAustenitic cast iron materials are relatively new to Germany, though they are already much used abroad, especially in the United States of America and in Britain, in chemical research techniques because of their high corrosion resistance. There are varieties with laminar graphite as well as with globular graphite. These materials are easy to cast and, compared with austenitic steels, easy to machine. The varieties with globular graphite have favourable mechanical properties; some of them show elongation values up to 40 pC. They are proof against thermic shocks and therefore suitable for use in refineries and petro-chemical works. A newly developed variety with globular graphite shows cold-toughness to -196° C. Austenitic cast iron materials have a high resistance to caustic alkalis, alkaline solutions and sea water. The varieties with higher chromium content show, especially at high flow velocities, a higher erosion resistance than non-alloyed cast iron or carbon steel. They have an adequate resistance to various diluted mineral acids, organic acids and many salt solutions. Austenitic cast iron materials are mainly used for pumps, valves, pipes, reaction boilers, bubble caps, compressors and expansion machines. As far as their corrosion resistance is concerned, they fill a gap between cast iron and carbon steel on the one hand and the expensive stainless steels and non-ferrous alloys on the other hand.
    Notes: Austenitische Gußeisenwerkstofe sind für Deutschland noch verhältnismäßig neu, werden aber im Ausland, vor allem in den Vereinigten Staaten won Amerika und in England wegen ihres guten Korrosionswiderstandes in der chemischen Verfahrenstechnik vie1 verwendet. Es gibt sowohl Sorten mit Lamellengraphit als auch nit Kugelgraphit. Diese Werkstoffe sind gut gießbar und  -  im Verhältnis zu austenitischen Stählen  -  leicht bearbeitbar. Die Sorten mit Kugelgraphit haben günstige mechanische Eigenschaften; einige Sorten weisen Dehnungswerte bis zu 40% auf. Sie sind thermoschockbeständig und daher für Verwendung in Raffinerien und petrochemischen Werken geeignet. Eine neuentwickelte Sorte mit Kugelgraphit ist bis -196° C kalt. Austenitische Gußeisenwerkstoffe sind gegenüber Ätzalkalien, alkalischen Lösungen und Meerwasser gut beständig. Die Sorten mit höheren Chromgehalten weisen vor allem bei hohen Strömungsgeschwindigkeiten einen größeren Widerstand gegenüber Erosion auf als unlegiertes Gußeisen and Kohlenstoffstahl. Sie sind hinreichend beständig in verschiedenen verdünnten Mineralsäuren sowie in organischen Säuren und in vielen Salzlösungen. Die austenitischen Gußeisenwerkstoffe werden hauptsächlich für Pumpen, Ventile, Rohrstücke, Reaktionskessel, Glockenböden, Kompressoren und Expansionsmaschinen verwendet. Sie füllen hinsichtlich ihres Korrosionswiderstandes eine Lücke aus zwischen Gußeisen und Kohlenstoffstah1 einerseits und den teureren nichtrostenden Stählen und Nichteisen Legierungen andererseits.
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 743-753 
    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 and acid resistant chromenickel steels with a maximum carbon content of 0.030% as a construction material for the chemical industryA report is given of studies concerning the structural stability and corrosion resistance of different austenitic corrosion and acid resistant steels, with special attention to their welding properties.Austenitic chrome-nickel steels tend to inter-crystalline corrosion after prolonged tempering at 500 to 700° C; such temperatures are encountered, inter alia, during welding.Steels with particularly low carbon content (maximum 0.030 pC, ELC steels) do not tend to inter-crystalline corrosion except after tempering periods exceeding ten hours, which do not occur during welding. Tic and NbC are not stable above 1200 to 1300°C so that, with stabilized steels, some very narrow zones along the weld will show a tendency to inter-crystalline corrosion, known as “knife edge attack”.For metallurgical reasons, the ELC steels have good weldability properties. Niobium-stabilised steels can be made brittle by niobides especially by those variants alloyed with molybdenum. Titanium-stabilised steels yield a comparatively viscous melt during welding, and may thus give rise to welding defects.ELC steels have a higher resistance to nitric acid than stabilised steelsThe mechanical strength o f ELC steels is somewhat lower than that of stabilised steels, but their strength can be improved by adding nitrogen.Some more recent varieties of ELC steels are discussed, together with examples of their application in the chemical industry.
    Notes: Studien mit Rücksicht auf die Gefügestabilität und die Korrosionsbeständigkeit von verschiedenen austenitischen rost- und säurebeständigen Stählen werden dargelegt. Spezielle Aufmerksamkeit wird den Schweißeigenschaflten der Stäble gewidmet.Austenitische Chrom-Nickel-Stable neigen zu interkristalliner Korrosion nach langdauerndem Anlassen bei 500 bis 700° C. Anlassen bei 500 bis 700° C erhält man u.a. beim Schweißen.Die extra niedriggekohlten Stähle mit max 0,030% C (ELC-Stähle) neigen nur zu interkristalliner Korrosion nach längeren Anlaßzeiten als 10 h, was aber beim Schweißen nicht vorkommt. TiC und NbC sind oberhalb 1200 bis 1300°c nicht stabil und bei stabilisierten Stählen neigen as darum sehr enge Zonen entlang der Schweißnaht zu interkristalliner Korrosion, sog. Meserlinienangriff.Die ELC-Stähle haben gute metallurgisch bedingte Schweißbarkeit. Niobstabilisierte Stähle können durch Niobide versprödert werden, besonders die molybdänlegierten Varianten. Die titanstabilisierten Stähle geben eine verhältnismäßig zähflüssige Schmelze beim Schweißen und können hierdurch Schweißfehler hervorrufen.Die ELC-Stähle sind in Salpetersäure beständiger als die stabilisierten Stähle.Die ELC-Stäble haben etwas niedrigere Festigkeit als die stabilisierten Stähle. Die Festigkeit kann durch Stickstoffzusatz noch verbessert werdenEinige neue ELC-Stäble werden dargestellt und Beispiele der Verwendung in der chemischen Industrie werden gegeben.
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 761-762 
    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 15 (1964), S. 775-780 
    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 15 (1964), S. 781-784 
    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 15 (1964), S. 771-774 
    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 15 (1964) 
    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 15 (1964), S. 2-7 
    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 of organic plastics, caused by perspiration of the skinPrompted by contact damage caused to technical utensils by perspiration of the skin, corrosion tests have been carried out with different organic plastics in different synthetic perspiration solutions frequently encountered. The tested materials, which belonged to different groups (plastics with synthetic resins through condensation; plastics with synthetic resins through polymerisation; cellulose and cellulose derivatives; casein products), showed considerable differences in their behaviour, not only in different perspiration solutions but also among each other, so that they can be divided into three resistance classes.
    Notes: An technischen Gebrauchsgegenständen durch Hautschweiß aufgetretene Berührungsschäden führten zur Durchführung von Korrosions-Standversuchen mit verschiedenen organischen Kunststoffen in verschiedenen, häufig benutzten synthetischen Schweißlösungen. Die Versuchs-Werkstoffe, die verschiedenen Stoffgruppen (Kunststoffe mit Kunstharzen durch Kondensation, Kunststoffe mit Kunstharzen durch Polymerisation, Cellulose- und Cellulosederivate, Caseinprodukte) angehörten, zeigten einmal in den verschiedenen Schweißlösungen, zum andern untereinander ein stark unterschiedliches, schließlich in drei Beständigkeitsgruppen eingruppiertes Verhalten.
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 30-45 
    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 criteria in the metal spraying techniqueDeparting from the early types, a description is given, by reference to design criteria, of the development of metal spraying techniques up to modern, more efficient gas-heated wire and powder spray guns. For the spraying of steel and other heavy metals, the electric arc spraying method is cheaper and yields a type of structure of higher quality; the development and practical application of this process is regarded as the most important advance in metal spraying in recent years. Other advances are automatic regulation and control of the spraying devices as well as mechanisation of spraying. The discussion then ranges over the principal criteria concerning the pre-treatment of the base, the mechanical, chemical and thermal post-treatment of the sprayed layers, the properties of these layers and the extent to which these can be influenced. As regards applications, mention is made of protective coatings against rust and corrosion, aluminium plating, sprayed bearing journals, repairs, re-fabrication, etc. In addition, a number of examples for the metal spraying of non-metallic substances are discussed.
    Notes: Ausgehend von den ersten Bauarten Wird die Entwicklung zu bedeutend leistungsfähigeren modernen gasbeheizten Draht- und Pulverspritzpistolen an Konstruktionsmerkmalen beschrieben. Das billigere elektrische Lichtbogenspritzen liefert beim Spritzen Stahl und anderen Schwermetallen einen hochwertigeren Gefügetyp, die Entwicklung und praktische Nutzanwendung dieses Verfahrens ist der bedeutendste Fortschritt der Metallspritztechnik in letzter Zeit. Automatische Regelung und Steuerung der Spritzgeräte sowie Mechanisierung des Spritzbetriebes sind weitere Fortschritte. Für die Haftgrundvorbehandlung, die mechanische, chemische und thermische Nachbehandlung der Spritzschichten sowie ihre Eigenschaften und deren Beeinflußbarkeit werden die wichtigsten Gesichtspunkte erörtert. Die praktische Nutzanwendung beschäftigt sich mit Rost- und Korrosionsschutzüberzügen, der Alumetierung, gespritzten Lagern, Reparaturen, Neufertigungen und an verschiedenartigen Beispielen wird auch die Spritzmetallisierung nichtmetallischer Stoffe beschrieben.
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 51-58 
    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 large-diameter pipes made of hard polyethyleneWith the aid of numerous illustrations, the applications of polyethylene pipes of relatively large diameters are surveyed. A special account is given of the advantages which such pipes may offer under different installation conditions. Especially in the Scandinavian countries  -  Norway, Finland and Sweden  -  where pipes are laid in the open even during the winter months, the toughness of hard polyethylene, even at low temperatures, is found to be a particular advantage. A special problem is posed by the need for a reliable jointing of large-diameter pipes. It is shown that, if the necessary conditions are adhered to, and if suitable aids are used, it is possible to obtain reliable butt welds, both between one pipe and another, and between pipe and welding collar. Such welding collars can be made in different ways. For instance, a mould is filled with the aid of an extruder and a rough cast prepared which, after cooling, is machined on a lathe. Pipes made of hard polyethylene are used not only for drinking water pipes but also for special purposes, e. g. cable protection pipes. For this purpose, a special technique, known as jetting method, is sometimes used for laying pipes across water.
    Notes: Anhand einer großen Anzahl van Bildern wird über den Einsatz van Rohren relativ großen Durchmessers aus Hart-Polyäthylen berichtet. Dabei wird auch auf die Vorteile, die solche Rohre unter den verschiedensten Verlegebedingungen bieten, näher eingegangen. Gerade in skandinavischen Ländern wie Norwegen, Finnland und Schweden, wo auch während der Wintermonate Rohrverlegungen im Freien stattfinden, erweist sich die gute Zähigkeit von Hart-Polyäthylen auch in der Kälte von besonderem Vorteil. Ein besonderes Problem stellt die zuverlässige Verbindung von Rohren großen Durchmessers der. Es wird gezeigt, daß bei Einhaltung der erforderlichen Bedingungen und bei Verwendung geeigneter Hilfsgeräte einwandfreie Stumpfschweißungen sowohl der Rohre untereinander als auch von Rohr und Vorschweißbund erzielt werden können. Die Herstellung solcher Vorschweißbunde kann auf verschiedene Arten vorgenommen werden; z. B. wird mit Hilfe eines Extruders eine Form gefüllt und durch Pressen ein Rohling hergestellt, der nach dem Erkalten auf einer Drehbank bearbeitet wird. Neben der Verwendung van Rohren aus Hart-Polyäthylen für Trinkwasserleitungen werden sie auch für Spezialzwecke, wie z. B. Kabelschutzrohre, eingesetzt. Dabei wird in manchen Fällen eine besondere Verlegetechnik beim Durchqueren van Gewässern, das sog. Einspülverfahren, angewandt.
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 70-79 
    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
    Description / Table of Contents: Recent research on the passivity of metalsThe anodic dissolution and passivation of metals is discussed from the point of view of a competitive adsorption of activating and passivating anions. It is shown that the concentration and acidity conditions on the surface of the metal differ greatly from those inside the solution; with electrode-kinetic investigations, it is therefore incorrect to reckon with the concentrations or acidities encountered in the solution. It is also shown that, on the one hand, the surface structure or lattice plane may have a considerable influence on the anodic behaviour whilst, on the other hand, the surface structure itself may differ greatly, depending on the anode potential. It follows that a clear determination of the electrode kinetics of the anodic dissolution and passivation of metals is extremely difficult.
    Notes: Die anodische Auflösung und die Passivierung der Metalle werden vom Standpunkt einer Konkurrenzadsorption von aktivierenden und passivierenden Anionen aus behandelt. Es wird gezeigt, daß die Konzentrations- und Aciditätsverhältnisse an der Oberfläche des Metalls und im Inneren der Lösung außerordentlich stark verschieden sind, so daß man aus dem Grund bei elektrodenkinetischen Untersuchungen nicht mit den Konzentrationen oder Aktivitäten in der Lösung rechnen kann; ferner wird einerseits gezeigt, daß die Oberflächenstruktur bzw. die Gitterebene auf das anodische Verhalten einen wesentlichen Einfluß hat, daß aber andererseits auch die Oberflächenstruktur je nach dem Anodenpotential sehr verschieden sein kann. Aus diesen Erscheinungen ergibt sich, daß die eindeutige Bestimmung der Elektrodenkinetik bei der anodischen Auflösung und Passivierung der Metalle außerordentlich schwierig ist.
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    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 79-84 
    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
    Description / Table of Contents: The resistance to sulphuric acid of austenitic nickel-chromium steels with molybdenum and copper contentsThe resistance to sulphuric acid, which is very limited with 18/8 Cr—Ni steel, is decisively improved by alloying with molybdenum and copper and by increasing the nickel content. A description is given of tentative investigations into the effect of an increased nickel content on the resistance in general and on the sensitivity to stress corrosion cracking in sulphuric acid; the results are compared with those obtained from a nickel-based alloy. A Cr—Ni steel with about 34 pC Ni, alloyed with Mo and Cu, which is discussed in some detail, showed the most favourable behaviour and remained free from cracks.
    Notes: Die Widerstandsfähigkeit gegen Schwefelsäure, die bei 1818 Cr—Ni-Stahl sehr beschränkt ist, wird durch Zulegierung von Mo und Cu sowie durch Erhöhung des Ni-Gehaltes entscheidend verbessert. Es werden informatorische Untersuchungen über die Wirkung eines erhöhten Ni-Gehaltes auf die allgemeine Beständigkeit und auf die Empfindlichkeit gegen Spannungsrißkorrosion in Schwefelsäure beschrieben; dabei wird ein Vergleich mit einer Nickelbasislegierung angestellt. Ein mit Mo und Cu legierter Cr—Ni-Stahl mit etwa 34% Ni, der näher beschrieben wird, zeigte das günstigste Verhalten und blieb auch frei von Rissen.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 297
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 84-88 
    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 weight constancy of laboratory equipment of 3% Iridium-Platinum in analytical operationsIn an effort to improve the mechanical resistance and dimensional stability of platinum laboratory equipment without impairing its chemical resistance, the weight constancy of 3% Iridium-Platinum was tested. This alloy, has higher tensile strength than normal crucible platinum, has been used in analytical laboratories exclusively used in the form of Monroetype Gooch Crucibles. By comparison of the weight constancy of crucibles, after using them for normal analytical ignition and fusing tests, and after exposure to acids, it was found that laboratory equipment of 3% Ir—Pt is equivalent to that of normal crucible platinum, but has a better dimensional stability. This result is confirmed in a great number of analytical laboratories.
    Notes: In dem Bestreben, die mechanische Widerstandsfähigkeit und Formbeständigkeit von Laboratoriumsgeräten aus Platin zu verbessern unter voller Erhaltung ihrer chemischen Beständigkeit, wurde die Gewichtskonstanz der Legierung Pt/3% Ir, die eine höhere Festigkeit als normales Geräteplatin besitzt und bisher nur in Form von Filtriertiegeln nach Neubauer im analytischen Labor eingesetzt wird, untersucht. Aus dem Vergleich der Gewichtsänderungen von Tiegeln bei einigen üblichen analytischen Glüh- und Schmelzoperationen sowie bei der Einwirkung von Säuren geht hervor, daß Geräte aus Pt/3% Ir bei guter Formbeständigkeit hinsichtlich ihrer Gewichtskonstanz dem normalen Geräteplatin ebenbürtig sind. Dieser Befund hat sich in der Praxis bestätigt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 298
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 92-93 
    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
    Type of Medium: Electronic Resource
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  • 299
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 97-98 
    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
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  • 300
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 15 (1964), S. 99-100 
    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
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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