Semiconducting properties of passive films formed on electroplated Ni and Ni-Co alloys

被引：59

作者：

Kang, Jianqiang ^{[1
]}

Yang, Yifu ^{[1
]}

Jiang, Xi ^{[1
]}

Shao, Huixia ^{[1
]}

机构：

[1] Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China

来源：

CORROSION SCIENCE | 2008年 / 50卷 / 12期

关键词：

Nickel; Cobalt; Alloy; Alkaline corrosion; Passive films;

D O I：

10.1016/j.corsci.2008.09.005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The semiconducting properties of the passive films on electroplated Ni and Ni-Co alloys were investigated using Mott-Schottky analysis. The cyclic voltammetry (CV) behaviors of Ni indicate that the film thickness will not increase unless the applied potential is higher than 0.504 V (vs. HgO/Hg). The passivity samples treated with CV reveal their behaviors are that of a p-type semiconductor. The three semiconductive parameters, the acceptor density (N-A), the flatband potential (E-fb) and the thickness of the space charge layer (L-sc) were calculated from the Mott-Schottky plots, respectively. The relationship between the parameters and the protective characters against corrosion was analyzed. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：3576 / 3580

页数：5

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