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Title |
Corrosion Resistance of Cr-bearing Rebar to Macrocell Corrosion Caused by Concrete with Crack
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Keywords |
Cr강방식철근 ; 방식성 ; 매크로셀 부식 ; 균열 Cr-bearing rebar ; Corrosion resistance ; Macrocell corrosion ; Crack |
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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 3㎏/㎥ was 9% or more. The corrosion-resisting performance of Cr-bearing rebar was particularly noticeable with a Cr content of 11% or more.
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