电化学修复后钢筋极化状态分析  

Polarization Analysis of Reinforced after Electrochemical Repair

作　　者：金伟良[1,2] 郭柱[1] 许晨[1] 

机构地区：[1]浙江大学结构工程研究所,杭州310058 [2]浙江大学宁波理工学院,宁波315800

出　　处：《中国腐蚀与防护学报》2013年第1期75-80,共6页Journal of Chinese Society For Corrosion and Protection

基　　金：国家科技部项目(S2011Z10100);国家自然科学基金重大国际合作项目(50920105806)资助

摘　　要：利用阳极极化曲线(APC)研究模拟孔隙液中电化学修复方法对钢筋极化参数的影响。结果表明,通电结束2h后钢筋阳极极化电流和电位较通电前均有较大变化:通电量P越大,阳极极化电流增大越多,钢筋电位降低越多。此后,阳极极化电流和钢筋电位开始回落,向通电前水平恢复,即有个去极化过程,去极化过程需要约42 d完成。钢筋去极化稳定后,其阳极极化电流和极化面积较通电前有所增大,是通电前的2～5倍;钢筋电位则回落到通电前水平。Different researchers make different conclusions on the reinforcement corrosion parameters after electrochemical repair. In order to give a reasonable explanation of the phenomenon, anodic polarization curve （APC） is employed to study the effects of electrochemical repair methods on polarization parameters of reinforced in simulated pore solution. The results show that the effects of different treatment duration and current density on the anodic polarization current and potential of the reinforced after various treatments. After the treatment, the anodic polarization current and reinforcement potential change a lot： the greater the power, the more the increase of anodic polarization current, the more the reduction of reinforcement potential. Over time, this change gradually weakens until smooth, which is a depolarization process, and usually takes 42 days. After depolarization, the polarization current of the reinforced is still relatively large compared with that before the treatment, usually 2-5 times, that shows the treatment can increase the polarization area of the reinforced, also 2-5 times; however, reinforcement potential changes little. By analysis of surface morphology of the reinforced, it is found that the surface of the reinforced becomes rougher after treatment, surface area increasing will make the polarization area increase, which is a reasonable interpretation of polarization current increasing after treatment.

关 键 词：阳极极化曲线(APC) 模拟孔隙液 电化学修复 阳极极化电流 钢筋电位 

分 类 号：TG174.1[金属学及工艺—金属表面处理]