Journal
CORROSION SCIENCE
Volume 169, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2020.108622
Keywords
Al-Mg-Zn alloy; Exfoliation corrosion; Subgrain; Subgrain stripe
Funding
- Major State Research and Development Program of China [2016YFB0300801]
- National Natural Science Foundation of China [51571013, 51971019]
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The role of subgrain stripe on the exfoliation corrosion behaviour in the Al-4.6 wt%Mg-3.1 wt%Zn alloy is revealed. The slight difference in the Volta potential distribution between the subgrain stripes and normal grains indicates that the selective corrosion in the subgrain stripes is not relevant to the electrochemical factor. Furthermore, the difference in the microstress state between two sides of the subgrain stripe boundary indicates a stress mechanism cooperate with the anodic dissolution mechanism is worked during the expansion of the selective exfoliation corrosion.
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