Steel bars in concrete structures can become severely corroded in chloride salt-containing environments, which can shorten the service life of the structure. Bidirectional electromigration rehabilitation (BIEM), a novel type of durability repair technology used on reinforced-concrete (RC) structures experiencing chloride corrosion, involves applying an electric field to discharge chloride ions from concrete and simultaneously applying a rust inhibitor to the steel surface. In this study, indoor experiments were performed to analyse the migration of chloride ions and the corrosion inhibitor in RC structures in the atmosphere and water-level-fluctuating areas. An electroosmotic device enhanced the efficiency of BIEM. The BIEM was particularly effective in wet–dry areas and inside the electroosmotic device. More than 90% of the chloride ions on the steel surface were removed within 15 mm of the electroosmotic device, and the chloride ion migration rate on the steel surface was 40%–60%. Scanning electron microscopy revealed that the surface of the steel bars was smooth after BIEM treatment, with no obvious pitting or corrosion products. The service life of concrete was calculated according to the prediction method of concrete. It can be expected that the concrete enters the early warning zone after 15 years and the rust zone after 30 years.

在含氯化物盐的环境中，混凝土结构中的钢筋会严重腐蚀，从而缩短结构的使用寿命。双向电迁移修复（BIEM）是一种用于遭受氯离子腐蚀的钢筋混凝土（RC）结构的新型耐久性修复技术，包括施加电场以从混凝土中排出氯离子，并同时在钢表面施加防锈剂。在这项研究中，进行了室内实验，以分析氯离子和腐蚀抑制剂在大气和水位波动区域的RC结构中的迁移。电渗设备提高了BIEM的效率。BIEM在干湿区域和电渗设备内部特别有效。在电渗设备15毫米内，钢表面上90％以上的氯离子被去除，钢表面上的氯离子迁移率为40％–60％。扫描电镜观察表明，BIEM处理后的钢筋表面光滑，没有明显的点蚀或腐蚀产物。根据混凝土的预测方法计算混凝土的使用寿命。可以预期，混凝土在15年后进入预警区，在30年后进入锈蚀区。根据混凝土的预测方法计算混凝土的使用寿命。可以预期，混凝土在15年后进入预警区，在30年后进入锈蚀区。根据混凝土的预测方法计算混凝土的使用寿命。可以预期，混凝土在15年后进入预警区，在30年后进入锈蚀区。