Corrosion Resistance and Electrochemical Behaviour of Amorphous Ni84.9Cr7.4Si4.2Fe3.5 Alloy in Alkaline and Acidic Solutions

被引：2

作者：

Chao Han ^{[1
,2
]}

Ying-Hua Wei ^{[1
,2
]}

Hai-Feng Zhang ^{[1
,2
]}

Zheng-Wang Zhu ^{[1
,2
]}

Jing Li ^{[1
,2
]}

机构：

[1] Institute of Metal Research , Chinese Academy of Sciences

[2] School of Materials Science and Engineering , University of Science and Technology of China

来源：

Acta Metallurgica Sinica(English Letters) | 2019年 / 32卷 / 11期

关键词：

Amorphous alloy; Corrosion; Electrochemical impedance spectroscopy; Potentiodynamic polarization; Scanning electron microscopy;

D O I：

暂无

中图分类号：

TG139.8 [];

学科分类号：

080502 ;

摘要：

In this work, the corrosion behaviours of the amorphous NiCrSiFealloy and its crystalline counterpart are studied in acidic, neutral, and alkaline solutions by scanning electron microscopy, electrochemical impedance spectroscopy, and potentiodynamic and potentiostatic polarization tests. X-ray photoelectron spectroscopy and scanning Kelvin probe are employed to characterize the alloy surface. The results show that the amorphous NiCrSiFealloy presents a better corrosion resistance compared to its crystalline counterpart, which is attributed to the uniform energy distribution of the atoms on the amorphous alloy surface, and this presents as a uniform electric potential map to effectively suppress the occurrence of the corrosion cell reaction.

引用

页码：1421 / 1436

页数：16