Effect of magnesium hydride on the corrosion behavior of an AZ91 magnesium alloy in sodium chloride solution

被引：82
|
作者：
Chen, Jian [1 ]
Dong, Junhua [1 ]
Wang, Jianqiu [1 ]
Han, Enhou [1 ]
Ke, Wei [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
来源：
CORROSION SCIENCE | 2008年 / 50卷 / 12期
关键词：
Magnesium; Porentiostatic; Corrosion; Pourbaix diagram;
D O I：
10.1016/j.corsci.2008.09.013
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of magnesium hydride on the corrosion behavior of an as-cast AZ91 alloy in 3.5 wt.% NaCl solution was investigated using gas collection method and potentiostatic test. The Pourbaix diagram of Mg-H2O system was built using thermodynamic calculation. It was possible that magnesium hydride could form in the whole pH range in theory. The experimental results showed that at cathodic region, magnesium hydride formed on surface, which was the controlling process for the corrosion behavior of AZ91 alloy; at anodic region and free corrosion potential, magnesium hydride model and partially protective film model, monovalent magnesium ion model and particle undermining model were responsible for the corrosion process of AZ91 alloy. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3610 / 3614
页数：5
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