首页|Correspondence between Susceptibility to SCC of 7050 Aluminum Alloy and Passive Film-induced Stress at Various pH Values
Correspondence between Susceptibility to SCC of 7050 Aluminum Alloy and Passive Film-induced Stress at Various pH Values
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The passive film-induced stress and the susceptibility to SCC of 7050 aluminum alloy in 3.5％ sodium chloride solution at various pH values were investigated by slow strain rate testing (SSRT) and flowing stress differential method.The results showed that the passive film-induced stress and the susceptibility to SCC decreased with increasing pH values when pH≤7,while they increased with increasing pH values when pH ＞7.However,the corrosion type was interpreted as exfoliation corrosion when pH=l and 14,and there was no film formed on the surface of the specimens.The whole variation plots of film-induced stress and the SCC susceptibility with pH values were both presented as a valley shape.The symbol and amount of the film-induced stress were related to the compositions of the passive film,which were analyzed using X-ray photoelectron spectroscopy (XPS).
7050 aluminum alloysusceptibility to SCCpH valuepassive film-induced stress
QI Xing、SONG Renguo、QI Wenjuan、JIN Jirong、WANG Chao、LI Hai、SUN Bin
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School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China
Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, China
Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou University, Changzhou 213164, China
Funded by the National Natural Science Foundation of China
NETL
NSTL
万方数据
维普
