Photo-electrochemical analysis of passive film formed on X80 pipeline steel in bicarbonate/carbonate buffer solution

被引：24
|
作者：
Li, D. G. [1 ,2 ]
Feng, Y. R. [2 ]
Bai, Z. Q. [2 ]
Zhu, J. W. [1 ]
Zheng, M. S. [1 ]
机构：
[1] Xian Jiaotong Univ, Sch Mat Sci & Engn, Xian 710049, Peoples R China
[2] CNPC, Tubular Goods Res Ctr, Xian 710065, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2008年 / 254卷 / 09期
关键词：
passive film; photo-electrochemical measurement; capacitance measurement; Mott-Schottky analysis;
D O I：
10.1016/j.apsusc.2007.10.036
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Photo-electrochemical measurement was used to explore the formation potential, formation time, chloride ions concentration, applied potential and pH value of the solution on the electronic property of passive film formed on X80 pipeline steel in 1 MNaHCO3/0.5 MNa2CO3 buffer solution. The results showed that the photocurrent is positive, indicating an n-type semiconductor character of the passive film, the photocurrent increased with increasing the formation potential, prolonging the formation time, decreasing chloride ions concentration, rising applied potential and decreasing the pH value of the solution. Capacitance measurement exhibited a positive slope of Mott-Schottky plot, and the slopes of Mott-Schottky plots increased with the increasing formation potential, showing a decrement of the donor density of the passive film. (c) 2007 Published by Elsevier B.V.
引用
收藏
页码：2837 / 2843
页数：7
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