The attack initiation of Al-Zn-In-Sn anode by the segregation concentrating Zn, Sn and In

被引：5
|
作者：
Qi, G. T. [1 ]
Qiu, Y. B. [1 ]
Zhao, Y. N. [2 ]
Cai, Q. Z. [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Dept Chem & Chem Engn, Wuhan 430074, Peoples R China
[2] Nanyang Inst Technol, Dept Biol & Chem Engn, Nanyang 473066, Peoples R China
来源：
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2009年 / 60卷 / 03期
关键词：
ALUMINUM SACRIFICIAL ANODES; ELECTROCHEMICAL-BEHAVIOR; CHLORIDE SOLUTIONS; INTERMETALLIC COMPOUNDS; ACTIVATION MECHANISM; MG ALLOYS; CORROSION; INDIUM; EIS;
D O I：
10.1002/maco.200805058
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure of Al-5%Zn-0.025%In-0.15%Sn anode was investigated by EPMA, and EDAX. The result showed that the microstructure at the Al-Zn-In-Sn anode can be categorized into two different types, namely the catenulate segregation enriched in Zn, Fe, Si, and the elliptical or rounded segregation where Zn, Sn, In concentrated. In order to explain the initial dissolution of the aluminum anode, the electrochemical behavior in 3% NaCl solution of the Al-Zn-In-Sn anode and its simulated segregation concentrating Zn, Sn, In were tested using potentiodynamic polarization and electrochemical impedance spectroscopy. The result showed that the simulated segregation concentrating Zn, Sn, In would preferentially be dissolved into the solution as the anode of galvanic cell.
引用
收藏
页码：206 / 210
页数：5
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