Study on Corrosion Resistance Coating Formed on Magnesium-Lithium Alloy by Micro-Arc Oxidation

被引：0
|
作者：
Jing Xiaoyan [1 ]
Yuan Yi [1 ]
Yu Fang [1 ]
Song Laiwen [2 ]
Zhang Milin [1 ]
Wang Tao [1 ]
Zhu Guoyi [2 ]
机构：
[1] Harbin Engn Univ, Minist Educ, Key Lab Superlight Mat & Surface Technol, Harbin 150001, Peoples R China
[2] Chinese Acad Sci, Changchun Inst Appl Chem, Changchun 130022, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2009年 / 38卷 / 07期
关键词：
Mg-Li alloys; micro-arc oxidation; corrosion resistance; CERAMIC COATINGS; SILICATE;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Micro-arc oxidation (MAO) coatings have been successfully prepared on Mg-Li alloys by micro-arc oxidation. The structure, phase composition and anti-corrosion behavior of MAO coatings are investigated by SEM, XRD, XPS, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). SEM images indicate the MAO coatings possess two layers "dense" and "loose layer". Plenty of micropores exist on the surface of MAO coatings. The diameter of micropores ranges from 2 to 7 mu m. XRD and XPS analysis reveal that MAO coatings are mainly composed of periclase MgO and amorphous phosphate compounds. Potentiodynamic polarization and electrochemical impedance spectroscopy results show that the corrosion resistance of Mg-Li alloys has been improved obviously after MAO treatment.
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页码：1154 / 1157
页数：4
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