Effect of in-situ micro-arc oxidation coating on the galvanic corrosion of AZ31Mg coupled to aluminum alloys

被引：35

作者：

Bai, Li-jing ^{[1
]}

Kou, Gang ^{[1
,3
]}

Zhao, Kai ^{[1
]}

Chen, Gui-tao ^{[2
]}

Yan, Fu-xue ^{[1
]}

机构：

[1] Xian Univ Technol, Sch Mat Sci & Engn, Xian, Shaanxi, Peoples R China

[2] Xian Univ Technol, Sch Mat Automat & Informat Engn, Xian, Shaanxi, Peoples R China

[3] Northwestern Polytech Univ, Carbon Carbon Composites Res Ctr, State Key Lab Solidificat Proc, Xian, Shaanxi, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 775卷

关键词：

Micro-arc oxidation; MgO; Magnesium; Aluminum; Galvanic corrosion; Weight loss; MAGNESIUM ALLOY; MECHANICAL-PROPERTIES; FLEXURAL PROPERTIES; THIN-FILMS; PROTECTION; RESISTANCE; MICROSTRUCTURE; HYDROXYAPATITE; ANODIZATION; COMPOSITES;

D O I：

10.1016/j.jallcom.2018.10.154

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Micro-arc oxidation (MAO) corrosion-resistant coating was prepared on AZ31Mg with MAO technique, and galvanic corrosion performance of the coated AZ31Mg coupled to 2024Al and 7075Al was studied. The results showed that the MAO coating can significantly protect AZ31Mg from galvanic corrosion and crevice corrosion. The lifetime of AZ31Mg with MAO coating coupled to 2024Al and 7075Al was 2184 h and 1800 h, respectively, when the surface corrosion morphology rating was 5. While it was only 264 h and 240 h for AZ31Mg. The MAO coating made the constraint of life-span of the coupled components changing from the anode corrosion of AZ31Mg to the corrosion of aluminum alloys and decreased the mass loss rate of the components greatly. This work had significant meaning to the applications of Mg alloys. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：1077 / 1085

页数：9

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