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

被引：0
|
作者：
Liu, ZhangSheng [1 ]
Wu, BianTao
Gu, MingYuan
机构：
[1] Shanghai Jiao Tong Univ, State Key Lab MMCs, Shanghai 200030, Peoples R China
[2] Shanghai Jiao Tong Univ, Dept Elect Engn, Shanghai 200030, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE | 2007年 / 42卷 / 14期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1007/s10853-006-0754-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
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：6
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