Effects of grain size on the corrosion resistance of wrought magnesium alloys containing neodymium

被引：432
作者：
Argade, G. R. [2 ,3 ]
Panigrahi, S. K. [2 ,3 ]
Mishra, R. S. [1 ,2 ,3 ]
机构：
[1] Univ N Texas, Dept Mat Sci & Engn, Denton, TX 76203 USA
[2] Missouri Univ Sci & Technol, Ctr Frict Stir Proc, Rolla, MO 65409 USA
[3] Missouri Univ Sci & Technol, Dept Mat Sci & Engn, Rolla, MO 65409 USA
来源：
CORROSION SCIENCE | 2012年 / 58卷
关键词：
Magnesium; Weight loss; SEM; Intergranular corrosion; BEHAVIOR; MICROCRYSTALLIZATION; ECAP;
D O I：
10.1016/j.corsci.2012.01.021
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A range of grain size from 70 mu m to 0.7 mu m was studied for corrosion resistance of Mg-Y-RE magnesium alloy using electrochemical and constant immersion testing in 3.5 wt.% NaCl solution. The linear polarization resistance (R-p) showed a clear trend of increasing R-p value with grain refinement. The ultrafine grained sample showed the most positive pitting potential as compared to coarse grained samples. One order of magnitude decrease in corrosion rate was observed between coarsest and ultrafine grained microstructure. (C) 2012 Elsevier Ltd. All rights reserved.
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收藏
页码：145 / 151
页数：7
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