Pitting Corrosion of Co_(1.5)CrFeNi_(1.5)T i_(0.5)Mo_(0.1) in Chloride-Containing Nitrate Solutions

Y.L. Chou; J. W. Yeh; H. C. Shih

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Pitting Corrosion of Co_(1.5)CrFeNi_(1.5)T i_(0.5)Mo_(0.1) in Chloride-Containing Nitrate Solutions

机译：Pitting Corrosion of Co_(1.5)CrFeNi_(1.5)T i_(0.5)Mo_(0.1) in Chloride-Containing Nitrate Solutions

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摘要

The purpose of this study was to investigate the effect of nitrate ions (NO_3~-) on the critical pitting temperature (CPT) of Co_(1.5)CrFeNi_(1.5)Ti_(0.5)Mo_(0.1) in chloride solutions using the potentiodynamic polarization method. Results indicate that the values of CPT for the alloy in 1 (mol/L) M sodium chloride (NaCI), 1 M NaCI with 0.1 M sodium nitrate (NaNO_3), and 1 M NaCI with 1 M NaNO_3 are 60, 70, and more than 80℃, respectively. Moreover, scanning electron microscopy (SEM) images show that nitrate ions enhance the initiation of pits, but impede the growth of preexisting pits on the surface of the alloy.

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《Corrosion: The Journal of Science and Engineering》 |2011年第6期|065003:1-065003:7|共7页
作者
Y.L. Chou; J. W. Yeh; H. C. Shih;
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作者单位

Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 300, Taiwan, China;

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正文语种英语
中图分类金属腐蚀与保护、金属表面处理;
关键词
alloys; corrosion; inhibitor; pitting; polarization; scanning electron microscopy;

Pitting Corrosion of Co_(1.5)CrFeNi_(1.5)T i_(0.5)Mo_(0.1) in Chloride-Containing Nitrate Solutions

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