Studies of the corrosion of mild steel in alkali-activated slag cement mortars with sodium chloride admixtures by a galvanostatic pulse method

被引：58

作者：

Holloway, M ^{[1
]}

Sykes, JM ^{[1
]}

机构：

[1] Univ Oxford, Dept Mat, Oxford OX1 3PH, England

来源：

CORROSION SCIENCE | 2005年 / 47卷 / 12期

基金：

英国工程与自然科学研究理事会;

关键词：

steel reinforced concrete; slag cement; galvanostatic pulse; passivity; pitting corrosion;

D O I：

10.1016/j.corsci.2005.05.035

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Corrosion of mild steel reinforcement in an alkali-activated slag (AAS) cement mortar containing NaCl admixtures has been investigated using an improved galvanostatic pulse technique. Corrosion rates were monitored at 90% relative humidity over a period of several months. On first exposure highest corrosion rates are seen with the lowest chloride levels, but over time different behaviours are seen for different chloride levels. The complex pattern of current and potential variation has been analysed using Tafel plots. Tentative conclusions are put forward to account for the behaviour seen, based on a model where oxidation of sulphide anions to sulphur prevents potential rising into the pitting regime and leads to inhibition of the oxygen cathode reaction. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：3097 / 3110

页数：14

共 17 条

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[2]

BAMFORTH PB, 1990, CORROSION REINFORCEM, P19

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