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

被引：111

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

页码：335 / 345

页数：11

共 36 条

[1] Galvanic coupling between carbon steel and austenitic stainless steel in alkaline media [J].