Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 51, Issue -, Pages 75-81Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2013.10.042
Keywords
Steel reinforced concrete; Chloride; Pitting corrosion; Microcell; Macrocell
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Funding
- China Ministry of Science and Technology under National 973 project [2009CB623200]
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Steel corrosion normally takes pitting pattern in chloride contaminated RC structures. This paper examines the localized corrosion rust accumulation process through electrochemical analysis. The coupled micro- and macro-cell corrosion process involved in typical chloride-induced corrosion is numerically simulated by employing the Finite Element Method (FEM). The modeling results show that macrocell corrosion rate may decrease drastically while microcell corrosion rate may not change so much during the gradual initiation process of corrosion around reinforcing steel. The non-uniform rust distribution around steel-concrete interface is found to be mainly caused by macrocell corrosion circulating between upper active and lower passive rebar surface. (C) 2013 Elsevier Ltd. All rights reserved.
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