Initial corrosion behavior of AZ91 magnesium alloy in simulating acid rain under wet-dry cyclic condition

来源期刊：中国有色金属学报(英文版)2008年增刊第1期

论文作者：周婉秋 单大勇 韩恩厚 柯伟

文章页码：334 - 338

Key words：magnesium alloy; atmospheric corrosion; simulating acid rain; wet-dry cycle

Abstract: Corrosion behavior of AZ91 magnesium alloy in simulating acid rain under wet-dry cyclic condition was investigated. The results show that corrosion potential shifts positively and the corrosion current density decreases at low wet-dry cyclic time. Further increase of the cyclic time results in the negative movement of corrosion potential and the increase of current density. SEM observation indicates that corrosion occurs only in α phase, β phase is inert in corrosive medium, and the corrosion of AZ91 magnesium appears in uniform characteristic. XPS analysis suggests that the corrosion product is mainly composed of oxide and hydroxide of magnesium and aluminum, and a small amount of sulfate is also contained in the film.

基金信息：the National Basic Research Program of China
5the National Natural Science Foundation of China