EFFECTS 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 steeland a temporary external anode which is placed on the concrete surface. Anions are pushedaway from the cathode (steel reinforcement),and cations are accumulated at the cathode. Inthis paper chloride ions can be found in the electrolyte during ECE. The removal efficiency ofchlorides was obvious. After treatment,few chlorides remained around the reinforcement.Steel potentials in treated specimens showed a strong shift towards more positive values,while potentials in control specimens remained strongly negative. The interface of concreteand steel became smoother after ECE.
electrochemical chloride extraction scanning electron microscopy corrosion potential repassivation
Jianzhi Xu Zhu Ding Feng Xing
The key Lab on durability of civil engineering in Shenzhen,Department of Civil engineering,Shenzhen University,Shenzhen,Guangdong,518060,PR China
国际会议
The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)
杭州
英文
1143-1147
2008-11-01（万方平台首次上网日期，不代表论文的发表时间）