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Title |
Mechanical Characteristics and Corrosion Resistance of Concrete Using Tannin Acid-Corrosion Inhibitor
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Authors |
양은익 ; 류종현 ; 염광수 ; 황인동 ; 김명유 |
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Keywords |
부식 ; 부식억제제 ; 탄닌산 ; 녹 ; 부식저항성 corrosion ; corrosion inhibitor ; tannin acid ; rust ; corrosion resistance |
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Abstract |
Many methods have been introduced to protect the corrosion of embedded steel in RC structure. One of the methods that restrain corrosion of steel is corrosion inhibitor. The technology that delayed the progress of corrosion is developed recently by converting active rust to passive rust. However, the performance for concrete structure is not fully examined because this corrosion inhibitor is developed for normal metal product. In this study, the application of corrosion inhibitor that use tannin acid is investigated by concrete specimen. According to the results, tannin acid corrosion inhibitor does not occur reduction of workability and strength in concrete. When corrosion inhibitor is added more than 4% per cement weight, the penetration depth of chloride decrease about 10%. Also, corrosion resistance of concrete is improved because tannin acid corrosion inhibitor has an effect on converting the rust of steel into stable state. It is showed in special that the addition more than 6% is effective in corrosion resistance.
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