期刊
SURFACE & COATINGS TECHNOLOGY
卷 270, 期 -, 页码 227-235出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2015.02.052
关键词
Magnesium; Alloy; Micro-arc oxidation; Mg-rich primer; EIS
资金
- Natural Science Research Program for Higher Education in Jiangsu Province, China [14KJB430012]
- Graduate Innovation Program of Jiangsu Province, China
- Natural Science Foundation of Jiangsu Province, China [BK20141292]
- National Natural Science Foundation of China [51301060]
A micro-arc oxidation (MAO) film is prepared on AZ91D magnesium alloy, and the effects of the MAO treatment on the performance of a Mg-rich primer on AZ91D alloy are studied. After MAO treatment an oxidized film with high porosity forms on the magnesium substrate. As a result, the adhesion of a Mg-rich primer to the AZ91D substrate increases. The MAO treatment significantly improves the performance of a Mg-rich primer on the AZ91D alloy, owing to the corrosion resistance of the MAO film. The coating system with MAO pre-treatment shows good barrier effects after 2400 h of salt spray testing and could serve to protect the AZ91D alloy below. (C) 2015 Elsevier B.V. All rights reserved.
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