염해에 노출된 콘크리트의 매립센서를 통한 철근부식 개시 측정에 관한 연구

Abstract

The purpose of this study was to monitor the initiation of steel corrosion due to chloride attack using embedded sensor. In general, Steel bars embedded in concrete are protected from corrosion by being forming a passive film on the surface. However, the passive film is destroyed by chemical erosion such as concrete carbonation and chloride penetration, and the rebar is exposed to the deteriorating factor and corrosion proceeds. In order to realize the initiation of steel corrosion, OCP and change of Impedance parameter were observed by using Half-cell and EIS method depending on cover depth. As result, 10mm cover showed the corrosion in 4weeks