Influences of Vanadium Doping on Structure and Performance of Aluminum Alloy Micro-Arc Oxidation Coating

被引：0
|
作者：
Wang Ping [1 ]
Guo Xiaoyang [1 ]
Mao Xianli [1 ]
机构：
[1] Southwest Petr Univ, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610500, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2014年 / 43卷 / 07期
关键词：
micro-arc oxidation; aluminum alloy; vanadium doping; corrosion resistance;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A vanadium doped aluminum alloy micro-arc oxidation (MAO) coating was prepared by adding ammonium vanadate in electrolytes. The influences of different adding concentration on the performance and structure of aluminum alloy MAO coating were studied. Surface morphologies of the coating were observed by SEM, V and 0 element contents on the MAO coating were analyzed by EDS, valence state of V and O element was determined by XPS, phase composition was analyzed by XRD and corrosion resistance was evaluated by polarization curve. The results show that VO3- transforms into V2O5 when the micro-arc discharges area temperature is above 1714.38 K. The formation of porous coating on the surface of MAO coating is restrained by the V2O5 of low melting point which melt firstly due to the effect of electric arc. Vanadium doping affects the phase composition of the MAO coating a little and it is helpful to improve the thickness and corrosion resistance of the coating.
引用
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页码：1759 / 1763
页数：5
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