High frequency impedance spectroscopy study of passive films formed on AISI 316 stainless steel in alkaline medium

被引：110
作者：
Abreu, CM [1 ]
Cristóbal, MJ [1 ]
Losada, R [1 ]
Nóvoa, XR [1 ]
Pena, G [1 ]
Pérez, MC [1 ]
机构：
[1] Univ Vigo, ETSEI, E-36200 Vigo, Spain
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2004年 / 572卷 / 02期
关键词：
AISI; 316; cyclic voltammetry; high frequency impedance; EIS; XPS;
D O I：
10.1016/j.jelechem.2004.01.015
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Passive films formed on AISI 316 in deaerated 0.1 M NaOH solution were studied using cyclic voltammetry, impedance spectroscopy and X-ray photoelectron spectroscopy techniques. The impedance spectra were recorded between 10 kHz and 1 mHz as a function of the electrode potential. Impedance spectra for a two-electrode cell were also recorded between 40 MHz and 100 Hz. The high frequency region of the impedance spectra reveals the existence of a time constant in that region that has been interpreted as a topotactic growth of the passive film, which is highly affected by O-2 availability at the metal I electrolyte interface. Low O-2 concentration favours the development of low conductivity areas that can prevail after potentiodynamic cycling. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：335 / 345
页数：11
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