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An ambiguity of the cathodic polarization effect on crack growth during stress corrosion cracking of aluminum alloys
Author(s) -
Marichev V. A.
Publication year - 1983
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.19830340204
Subject(s) - cathodic protection , materials science , polarization (electrochemistry) , electrolyte , stress corrosion cracking , corrosion , metallurgy , cracking , alloy , chloride , aluminium , anode , composite material , chemistry , electrode
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.