2012•Rejiagong gongyiRequires access

Effect of Enhanced-solid-solution on Intergranular Corrosion and Exfoliation Corrosion of 7075 Al Alloy

Zhang Zhenqiang

Abstract

The effects of enhanced-solid-solution treatment on intergranular corrosion and exfoliation corrosion properties of 7075 Al alloy were investigated.The results show that compared with the conventional solid-solution(470 ℃ × 2 h) plus T6 treatment,the enhanced solid-solution(470 ℃ × 2 h + 480 ℃ × 2 h + 490 ℃ × 2 h) plus T6 treatment advances the dissolution of coarse second phase,and accelerates kinetics of ageing.The intergranular corrosion resistance advances from third to second grade.The corrosion resistance improves from EC into EA grade.

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Key concepts: Intergranular corrosion, Corrosion, Materials science, Alloy, Metallurgy, Dissolution, Solid solution, Exfoliation joint