Microstructure and corrosion resistance of modified AZ31 magnesium alloy using microarc oxidation combined with electrophoresis process

被引：0
|
作者：
Wei Yang
Ping Wang
Yongchun Guo
Bailing Jiang
Fei Yang
Jianping Li
机构：
[1] Xi’an Technological University,School of Materials Science and Chemical Engineering
[2] Xi’an University of Technology,School of Materials Science and Engineering
来源：
Journal of Wuhan University of Technology-Mater. Sci. Ed. | 2013年 / 28卷
关键词：
magnesium alloy; ceramic coating; composite coating; adhesion; corrosion resistance;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A top electrophoresis coating was deposited on the surface microarc oxidation (MAO) modified ceramic coating on AZ31 magnesium alloy. Microstructure and corrosion resistance of this composite coating were studied by SEM, electrochemical potentiodynamic polarization, and acid corrosion test. The results showed that the composite coating with a top electrophoresis coating on the surface of ceramic coating exhibited a better corrosion resistance compared with the coating formed by chemical conversion film combined with electrophoresis process. Corrosive ions could permeate into the substrate with corrosion time, and the composite coating was firstly destroyed around the scratch. The formation of composite coating with a higher adhesive force due to the porosity of the ceramic coating contributed to the improved corrosion resistance property.
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页码：612 / 616
页数：4
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