Effect of AlN particles on the corrosion behavior of Al/AlNP composites

被引：0
|
作者：
ZhangSheng Liu
BianTao Wu
MingYuan Gu
机构：
[1] Shanghai JiaoTong University,State Key Lab of MMCs
[2] Shanghai Jiao Tong University,Department of Electrical Engineering
来源：
Journal of Materials Science | 2007年 / 42卷
关键词：
Zeta Potential; Polarization Curve; Corrosion Behavior; Immersion Time; Potentiodynamic Polarization;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The corrosion behavior of Al/AlNP composites has been examined by using potentiodynamic polarization technique in 3.5wt% NaCl solution with the pH value of 5, 8.6, and 11.6 respectively. Electrochemical impedance spectra (EIS) measurements have also been carried out to assess the long-term effects of AlN particles. It has been found that Al/AlNp composites show the increased susceptibility to pitting attack compared with the unreinforced Al, which is attributed to the micro-galvanic action between AlN particles and the matrix Al. The micro-galvanic action mainly arises as a result of hydrolysis of AlN particles. In addition, EIS measurements reveal that the corrosion mechanism of Al/AlNp composites changes a lot with increasing immersion time, which is controlled by diffusion process at last.
引用
收藏
页码：5736 / 5741
页数：5
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