Influence of silicon on the corrosion behaviour of Al-Zn-In-Mg-Ti sacrificial anode

被引：36
|
作者：
Wen, Jiuba [1 ]
He, Junguang [1 ,2 ]
Lu, Xianwen [1 ]
机构：
[1] Henan Univ Sci & Technol, Sch Mat Sci & Engn, Luoyang 471003, Peoples R China
[2] Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China
来源：
CORROSION SCIENCE | 2011年 / 53卷 / 11期
关键词：
Aluminium; TEM; Polarisation; Weight loss; Pitting corrosion; ELECTROCHEMICAL-BEHAVIOR; LOCALIZED CORROSION; ALUMINUM; ACTIVATION; ALLOY; MICROSTRUCTURE; SOLIDIFICATION; IONS;
D O I：
10.1016/j.corsci.2011.07.039
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of Si on the corrosion behaviour of Al-5Zn-0.03In-1Mg-0.05Ti (wt.%) alloy was investigated by the microstructure observation and electrochemical measurements in order to improve its corrosion non-uniform and electrochemical properties. The main precipitates in Al-5Zn-0.03In-1Mg-0.05Ti-0.1Si (wt.%) alloy is Mg2Si phase, which decrease the galvanic corrosion because the potential difference between Mg2Si and a-Al is smaller than that between MgZn2 and a-Al. The addition of Si improves the corrosion uniformity of the anode due to the fine equiaxed grains and grain boundaries where Mg2Si particles uniformly distributed. The results indicate that the microstructure, electrochemical characteristics and corrosion uniformity can be improved significantly after adding 0.1 wt.% Si into Al-5Zn-0.03In-1Mg-0.05Ti (wt.%) alloy. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3861 / 3865
页数：5
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