Mierostrueture and Corrosion Resistance of Modified AZ31 Magnesium Alloy Using Microarc Oxidation Combined with Electrophoresis Process

Mierostrueture and Corrosion Resistance of Modified AZ31 Magnesium Alloy Using Microarc Oxidation Combined with Electrophoresis Process

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 resu...

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Veröffentlicht in:武汉理工大学学报：材料科学英文版 2013 (3), p.612-616
1. Verfasser: YANG Wei WANG Ping GUO Yongchun JIANG Bailing YANG Fei LI Jianping
Format: Artikel
Sprache:eng
Schlagworte:
AZ31镁合金
化学转化膜
复合涂层
微弧氧化
改性
电泳工艺
耐腐蚀性能
陶瓷涂层
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description 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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subjects AZ31镁合金
化学转化膜
复合涂层
微弧氧化
改性
电泳工艺
耐腐蚀性能
陶瓷涂层
title Mierostrueture and Corrosion Resistance of Modified AZ31 Magnesium Alloy Using Microarc Oxidation Combined with Electrophoresis Process
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