Influence of Ga and Bi on electrochemical performance of Al-Zn-Sn sacrificial anodes

被引：36

作者：

He Jun-guang ^{[1
,2
]}

Wen Jiu-ba ^{[2
]}

Li Xu-dong ^{[1
]}

Wang Guo-wei ^{[2
]}

Xu Chun-hua ^{[2
]}

机构：

[1] Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China

[2] Henan Univ Sci & Technol, Sch Mat Sci & Engn, Luoyang 471003, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2011年 / 21卷 / 07期

关键词：

aluminium; sacrificial anode; electrochemical performance; electrochemical impedance spectroscopy; segregation; MG ALLOYS; ALUMINUM; ELECTROLYTES; CORROSION; BEHAVIOR; GALLIUM;

D O I：

10.1016/S1003-6326(11)60900-X

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The influence of Ga and Bi on the microstructure and electrochemical performance of Al-7Zn-0.1Sn (mass fraction, %) sacrificial anodes was investigated by means of optical microscopy (OM), scanning electron microscopy/energy dispersive X-ray analysis (SEM/EDAX) and electrochemical measurements. It was found that the coarse dendrites structure transformed into the equiaxed grains as well as a small amount of dendrite grains after adding Ga and Bi into Al-Zn-Sn alloys. A high current efficiency of 97% and even corrosion morphology were obtained for Al-7Zn-0.1Sn-0.015Ga-0.1Bi alloy. The results indicate that the proper amount of Ga and Bi is effective on improving the microstructure and electrochemical performance of Al-Zn-Sn alloy.

引用

页码：1580 / 1586

页数：7

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