Effect of the aluminium content of AlxCrFe1.5MnNi0.5 high-entropy alloys on. the corrosion behaviour in aqueous environments

被引：385

作者：

Lee, C. P. ^{[1
]}

Chang, C. C. ^{[1
]}

Chen, Y. Y. ^{[1
]}

Yeh, J. W. ^{[1
]}

Shih, H. C. ^{[1
,2
]}

机构：

[1] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu 300, Taiwan

[2] Chinese Culture Univ, Inst Mat Sci & Nanotechnol, Taipei 111, Taiwan

来源：

CORROSION SCIENCE | 2008年 / 50卷 / 07期

关键词：

alloy; polarization; EIS; passivity; pitting corrosion;

D O I：

10.1016/j.corsci.2008.04.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-entropy alloys (HEAs) are a newly developed family of multi-component alloys. The potentiodynamic polarization and electrochemical impedance spectroscopy of the AlxCrFe1.5MnNi0.5 alloys, obtained in H2SO4 and NaCl solutions, clearly revealed that the corrosion resistance increases as the concentration of aluminium decreases. The AlxCrFe1.5MnNi0.5 alloys exhibited a wide passive region, which extended >1000 mV in acidic environments. The Nyquist plots of the Al-containing alloys had two capacitive loops, which represented the electrical double layer and the adsorptive layer. SEM micrographs revealed that the general and pitting corrosion susceptibility of the HEAs increased as the amount of aluminium in the alloy increased. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：2053 / 2060

页数：8

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