Stress Corrosion Cracking Behavior of 2024 and 7075 High-Strength Aluminum Alloys in a Simulated Marine Atmosphere Contaminated with SO2
Abstract
The stress corrosion cracking (SCC) of high-strength 2024-T351 and 7075-T651 aluminum alloys in simulated marine atmospheric medium containing HSO3- was investigated. The results showed that the presence of HSO3- could significantly accelerate the corrosion process of 2024-T351 and 7075-T651 high-strength aluminum alloy. This process was attributed to the enhanced anodic dissolution and hydrogen embrittlement caused by the HSO3-. The SCC susceptibility showed an increasing trend in both of aluminum alloys with increasing HSO3- concentration. Meanwhile, the hydrogen generated by HSO3- was shown to change the failure mode of these two aluminum alloys.
- Publication:
-
Journal of Materials Engineering and Performance
- Pub Date:
- January 2020
- DOI:
- 10.1007/s11665-019-04537-7
- Bibcode:
- 2020JMEP...29..410G
- Keywords:
-
- high-strength aluminum alloy;
- marine atmosphere;
- stress corrosion cracking;
- SO<SUB>2</SUB>