Quantitative analysis of pitting corrosion behavior of thixoformed A356 alloy in chloride medium using electrochemical techniques

被引：31
作者：
Tahamtan, S. [1 ]
Boostani, A. Fadavi [1 ]
机构：
[1] Isfahan Univ Technol, Dept Mat Sci & Engn, Esfahan, Iran
来源：
MATERIALS & DESIGN | 2009年 / 30卷 / 07期
关键词：
Corrosion; Microstructure; ALUMINUM-ALLOYS; MICROSTRUCTURE; PARTICLES; 7075-T6; PART;
D O I：
10.1016/j.matdes.2008.10.003
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Pitting behavior of thixoformed A356 alloy, with different reheating temperatures, was evaluated and compared with the pitting behavior of rheocast and gravity-cast A356 alloy with the same composition. The presence of silicon particles lead to the development of pitting at the silicon-matrix interface. Results of galvanic corrosion simulation showed that the resistance to pitting corrosion of thixoformed samples formed at 590 degrees C was higher than the samples formed at 600 degrees C as well as rheocast and gravity-cast samples. These results relate pitting corrosion behavior of thixoformed, rheocast and gravity-cast A356 alloy to their microstructure characteristics using a new parameter in the form of lambda/DV. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2483 / 2489
页数：7
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