Journal
CORROSION SCIENCE
Volume 209, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2022.110730
Keywords
Aluminum; Corrosion behavior; Mechanical properties; Pre-ageing; Retrogression and re-aging
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The influence of initial alloy temper on corrosion resistance for Al-Zn-Mg-Cu alloy was investigated. The results showed that specimens after pre-ageing and simulated baking treatment exhibited high strength and improved inter-granular corrosion resistance.
The influence of initial alloy temper on corrosion resistance for Al-Zn-Mg-Cu alloy was investigated in detail. The results showed that the specimens after pre-ageing (PA) and simulated baking (SB) treatment exhibited the high strength (ultimate tensile strength: 543 MPa, yield strength: 445 MPa), contributing to improving the stress corrosion cracking resistance with the strength loss of 2.7 % during the slow strain rate test. In addition, the inter-granular corrosion property was enhanced by PA + SB process, and the maximum corrosion depth of PA + SB specimen was only 19.77 mu m, which was attributed to the large-sized grain boundary precipitates with high Cu content.
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