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Corrosion Resistance of Cr-bearing Rebar to Macrocell Corrosion Caused by Concrete with Crack  

Tae, Sung-Ho (한양대학교 친환경건축 기술혁신 연구센터)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.10, no.4, 2006 , pp. 79-86 More about this Journal
Abstract
This study was investigated to corrosion resistance of Cr-bearing rebars to macrocell corrosion caused by concrete with crack. Ten types of steel bars having different Cr contents were embedded in concretes with imitation crack. The corrosion resistance of the Cr-bearing rebar was examined by measuring half-cell potential, macrocell corrosion current, corrosion area and weight loss up to 105 cycles of salt spray testing. The results revealed that the Cr content required for corrosion resistance in a macrocell corrosion environment caused by chloride ion gap of $3kg/m^3$ was 9% or more. The corrosion-resisting performance of Cr-bearing rebar was particularly noticeable with a Cr content of 11% or more.
Keywords
Cr-bearing rebar; Corrosion resistance; Macrocell corrosion; Crack;
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