FACTORS AFFECTING THE CORROSION RATE OF STEEL IN CARBONATED MORTARS

被引：223

作者：

GLASS, GK ^{[1
]}

PAGE, CL ^{[1
]}

SHORT, NR ^{[1
]}

机构：

[1] UNIV ASTON,DEPT CIVIL ENGN,BIRMINGHAM B4 7ET,W MIDLANDS,ENGLAND

来源：

CORROSION SCIENCE | 1991年 / 32卷 / 12期

关键词：

D O I：

10.1016/0010-938X(91)90048-T

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The corrosion of steel in carbonated mortar has been investigated by monitoring polarization resistance, corrosion potential and mortar resistivity. The results suggest that factors such as relative humidity and chloride contamination affect the corrosion rate via their influence on mortar resistivity. To account for the observed electrochemical relationships, most notably the linear correlation between corrosion rate and conductivity, and the exponential increase in corrosion rate with fall in corrosion potential, it is proposed that the corrosion kinetics of steel in carbonated mortar are subject to anodic control with the anodic reaction rate being limited by the resistance of the mortar. In this model, termed anodic resistance control, resistivity is viewed as a factor which may limit a half reaction rate in a similar way to diffusion and activation polarization. It is also shown that, when such a model is operating, the use of polarization resistance to monitor corrosion rate changes may still be justified provided the cathodic reaction rate is an exponential function of potential.

引用

页码：1283 / 1294

页数：12

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