Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1471303 | Corrosion Science | 2008 | 5 Pages |
Abstract
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.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Jian Chen, Junhua Dong, Jianqiu Wang, Enhou Han, Wei Ke,