摘要
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 inαphase,βphase 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.
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 a 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.
出处
《中国有色金属学会会刊：英文版》
CSCD
2008年第A01期334-338,共5页
Transactions of Nonferrous Metals Society of China
基金
Project(50671005)supported by the National Natural Science Foundation of China
Project(2007CB613705)supported by National BasicResearch Program of China
关键词
AZ91镁合金
电化学性能
腐蚀
热处理
magnesium alloy
atmospheric corrosion
simulating acid rain
wet-dry cycle
