混凝土中钢筋极化曲线特征分析  

Analysis of Polarization Curves Characteristics of Rebar in Concrete

作　　者：许晨[1] 金伟良[1] 李志远[1] 岳增国[1] 

机构地区：[1]浙江大学结构工程研究所,杭州310058

出　　处：《土木建筑与环境工程》2012年第5期64-69,共6页Journal of Civil,Architectural & Environment Engineering

基　　金：国家自然科学基金重大国际合作项目(50920105806);国家科技支撑项目(2011BAJ09B03)

摘　　要：为避免极化曲线测试中平衡电位发生偏移,提出了阳极极化电流方法。根据锈蚀前后钢筋极化曲线特征分析对平衡电位发生偏移做出了合理解释,明确了相关影响因素。给出了基于阳极极化电流法的钢筋锈蚀临界极化电流密度及相应的腐蚀电流密度经验公式。试验结果表明,阳极极化电流方法能有效判别钢筋锈蚀,对应的临界极化电流密度为0.2μA/cm2。To avoid equilibrium potential shifts in polarization curve test,based on anodic polarization current method,the critical polarization current density of steel corrosion was given as well as the corresponding empirical formula of corrosion current density.Reasonable explanation to equilibrium potential shifts was given by studying polarization curves characteristic of rebar in concrete before and after corrosion.The results show that anodic polarization current method can effectively distinguish steel corrosion,and the critical polarization current density is 0.2 μA/cm2.

关 键 词：混凝土 钢筋锈蚀 极化曲线 Tafel 腐蚀电流 

分 类 号：TU528[建筑科学—建筑技术科学]