Environmental friendly plasma electrolytic oxidation of AM60 magnesium alloy and its corrosion resistance

被引：39
|
作者：
Cao Fa-he [1 ]
Lin Long-yong [2 ]
Zhang Zhao [1 ]
Zhang Jian-qing [1 ,3 ]
Cao Chu-nan [1 ,3 ]
机构：
[1] Zhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China
[2] Zhejiang Univ, Dept Chem Engn, Hangzhou 310027, Peoples R China
[3] Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 11016, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2008年 / 18卷 / 02期
基金：
中国国家自然科学基金;
关键词：
AM60; plasma electrolytic oxidation; AC technique; corrosion resistance;
D O I：
10.1016/S1003-6326(08)60043-6
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Plasma electrolytic oxidation of Mg-based AM60 alloys was investigated using 50 Hz AC anodizing technique in an alkaline borate solution, which contained a new kind of organic. The anodic film is relatively smooth with some micro pores and cracks, while the anodic film consists of MgO, MgAl2O4 and MgSiO3. The electrochemical behavior of anodic film was studied by electrochemical impedance spectroscopy and potentiodynamic polarization. Polarization results indicate the PEO treatment can decrease corrosion current by 3-4 magnitude compared with blank AM60 alloy. The anodic film presents a good level of corrosion protection for AM60 magnesium alloy, over 272 It of the salt spray test based on ASTM B117. The effect of micro-structure and composition on corrosion protection efficiency was also investigated.
引用
收藏
页码：240 / 247
页数：8
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