Passive and transpassive behaviour of Alloy 31 in a heavy brine LiBr solution

被引：121

作者：

Fernandez-Domene, R. M. ^{[1
]}

Blasco-Tamarit, E. ^{[1
]}

Garcia-Garcia, D. M. ^{[1
]}

Garcia-Anton, J. ^{[1
]}

机构：

[1] Univ Politecn Valencia, Dept Ingn Quim & Nucl, ETSI Ind, Valencia 46022, Spain

来源：

ELECTROCHIMICA ACTA | 2013年 / 95卷

关键词：

Stainless steel; Passive film; Transpassivity; EIS; Mott-Schottky; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; DUPLEX STAINLESS-STEEL; POINT-DEFECT MODEL; FE-CR ALLOYS; ELECTRONIC-STRUCTURE; OXIDE-FILMS; SEMICONDUCTING PROPERTIES; DISSOLUTION MECHANISM; CHEMICAL-COMPOSITION; CORROSION BEHAVIOR;

D O I：

10.1016/j.electacta.2013.02.024

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The passive and transpassive behaviour of Alloy 31, a highly alloyed austenitic stainless steel (UNS N08031), has been investigated in a LiBr heavy brine solution (400 g/l) at 25 degrees C using potentiostatic polarisation combined with electrochemical impedance spectroscopy and Mott-Schottky analysis. The passive film formed on Alloy 31 has been found to be p-type and/or n-type in electronic character, depending on the film formation potential. The thickness of the film formed at potentials within the passive region increases linearly with applied potential. The film formed at transpassive potentials is thinner and more conductive than the film formed within the passive region. These observations are consistent with the predictions of the Point Defect Model for passive and transpassive films on metals and alloys. (c) 2013 Elsevier Ltd. All rights reserved.

引用

页码：1 / 11

页数：11

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