Review of studies on corrosion of magnesium alloys

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Abstract

This review provided some recent progress of the research on corrosion mechanisms of magnesium and its alloys and a basis for follow-on research. Galvanic corrosion, pitting corrosion, intergranular corrosion (IGC), filiform corrosion, crevice corrosion, stress corrosion cracking (SCC), and corrosion fatigue (CF) were discussed. The influence of metallurgical factors such as alloying elements, microstructure and secondary phases, processing factors such as heat treatment and weld, and environmental factors including temperature, relative humidity, solution pH values and concentration on corrosion were discussed. In particular, a mechanism of pitting corrosion caused by AIMn particles was proposed. The corrosion properties of AZ91D weld material were investigated.

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    Foundation item: Project (CSTL, 2004BA4002 and 8655) supported by the Key Natural Science Foundation of Chongqing Municipal Science and Technology Committee, China; Project (KJ050604) supported by the Science and Technology Program of Chongqing Municipal Education Committee, China

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