Influence of steel-concrete interface condition on galvanic corrosion currents in carbonated concrete

被引：76

作者：

Nasser, A. ^{[1
]}

Clement, A. ^{[1
]}

Laurens, S. ^{[1
]}

Castel, A. ^{[1
]}

机构：

[1] Univ Toulouse, UPS, INSA, LMDC, F-31077 Toulouse 4, France

来源：

CORROSION SCIENCE | 2010年 / 52卷 / 09期

关键词：

Concrete; Modelling studies; Interfaces; Alkaline corrosion; REINFORCEMENT CORROSION; QUALITY;

D O I：

10.1016/j.corsci.2010.04.037

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper presents specific experiments which were developed in order to assess galvanic currents in macrocell corrosion specimens involving active steel in carbonated concrete and passive steel in sound concrete. The influence of the steel-concrete interface condition on the galvanic current was also experimentally investigated. To focus on macrocell corrosion rate assessment, the initiation time of the corrosion process (concrete carbonation) was accelerated. FEM simulations were carried out in order to enhance the physical comprehension of these corrosion experiments. It was found that, in realistic condition, the electrical coupling of active and passive steel areas leads to high galvanic currents and consequently high corrosion levels according to RILEM recommendation. Moreover, steel-concrete interfacial defaults significantly increase the macrocell driving potential and, therefore, the galvanic corrosion current. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：2878 / 2890

页数：13

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