Journal
CORROSION SCIENCE
Volume 155, Issue -, Pages 1-12Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2019.04.031
Keywords
Aluminium; SEM; TEM; Intergranular corrosion
Funding
- Innovative Foundation of Huazhong University of Science and Technology [2018KFYYXJJ124, EP/H020047/1]
- WNLO of HUST
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In the present work, microstructure and intergranular corrosion behaviour of AA2024-T3 alloy are studied. Using electron diffraction techniques to correlate stored energy distribution with corrosion propagation path, intergranular corrosion tends to occur in the periphery of grain with relatively high stored energy. Further, it is revealed that Cu tends to segregate at dislocations, resulting in high Cu content of grain with high stored energy, which promotes corrosion propagation into its interior. In addition, based on the relationship between stored energy and boundary attack, intergranular corrosion during the immersion in NaCl solution could be successfully predicted.
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