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An ambiguity of the cathodic polarization effect on crack growth during stress corrosion cracking of aluminum alloys

✍ Scribed by V. A. Marichev

Publisher: John Wiley and Sons
Year: 1983
Tongue: German
Weight: 652 KB
Volume: 34
Category: Article
ISSN: 0947-5117
DOI: 10.1002/maco.19830340204

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✦ Synopsis

Abstract

The kinetics of crack growth under the conditions of stress corrosion cracking of aluminum alloys in electrolytes with different anion composition and pH values from 0 to 13 has been studied. It is shown that for the majority of alloy‐electrolyte systems anodic polarization accelerates whereas cathodic polarization decelerates crack growth. For “chromic acid – sodium chloride” electrolyte it is shown that cathodic polarization under the conditions of stress corrosion cracking (SCC) has an ambiguous effect on crack growth. The behaviour of A127‐;1 alloy is taken as an illustration of such SCC cracking growth in these electrolytes.

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