Effect of Electrochemical Chloride Extraction on the Steel Reinforced Concrete
Electrochemical chloride extraction (ECE) is used for the rehabilitation of chloride-contaminated concrete. High current densities of steel surface are applied between the steel and a temporary external anode which is placed on the concrete surface. Anions are pushed away from the cathode (steel reinforcement), and cations are accumulated at the cathode. In this study chloride ions were found in the electrolyte during ECE. The extraction efficiency of chlorides was obvious. After treatment, the amount of chlorides around the reinforcement was greatly reduced. ECE had insignificant effect on the compressive strength. Steel potentials in treated specimens showed a strong shift towards more positive values, while potentials in control specimens remained strongly negative.
Jingsi Huo, Yan Xiao, Zongjin Li and Shuaib Ahmad
J. Z. Xu et al., "Effect of Electrochemical Chloride Extraction on the Steel Reinforced Concrete ", Key Engineering Materials, Vols. 400-402, pp. 221-225, 2009