Thermogalvanic corrosion of Alloy 31 in different heavy brine LiBr solutions

被引：20

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, Ingn Electroquim & Corros IEC, Dept Ingn Quim & Nucl, ETSI Ind, E-46071 Valencia, Spain

来源：

CORROSION SCIENCE | 2012年 / 55卷

关键词：

Stainless steel; EIS; Polarisation; Passive films; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; AQUEOUS LITHIUM-BROMIDE; STAINLESS-STEEL; PASSIVE FILMS; ELECTRONIC-STRUCTURE; ALKALINE-SOLUTION; OXIDE-FILMS; MILD-STEEL; ELEVATED-TEMPERATURE; GALVANIC CORROSION;

D O I：

10.1016/j.corsci.2011.10.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Thermogalvanic corrosion generated between two electrodes of Alloy 31, a highly-alloyed austenitic stainless steel (UNS N08031), has been investigated imposing different temperature gradients in three deaerated LiBr solutions, under open circuit conditions by using a zero-resistance ammeter (ZRA). Besides EIS spectra were acquired in order to explain the obtained results. On the whole, cold Alloy 31 electrodes were anodic to hot Alloy 31 electrodes, since an increase in temperature favoured the cathodic behaviour of the hot electrode. Thermogalvanic corrosion of Alloy 31 in the LiBr solutions studied was not severe, although it negatively affects the corrosion resistance of the cold anode. The protective properties of the passive film formed on the anode surface were found to improve with thermogalvanic coupling time. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：40 / 53

页数：14

共 98 条

[1] Transport processes in steam generator crevices -: III.: Experimental results [J].