混凝土中钢筋的电化学参数对宏电池腐蚀电流和控制模式的影响  

Influence of electrochemical parameters of steels in concrete on macro-cell corrosion current and control mode

作　　者：曹忠露[1,2] 冯浩 李俊毅 李沛[1] 张文锋[1] CAO Zhong-lu;FENG Hao;LI Jun-yi;LI Pei;ZHANG Wen-feng(CCCC Tianjin Port Engineering Institute Co.,Ltd.,Tianjin 300222,China;CCCC First Harbor Engineering Co.,Ltd.,Tianjin 300461,China)

机构地区：[1]中交天津港湾工程研究院有限公司,天津300222 [2]中交第一航务工程局有限公司,天津300461

出　　处：《中国港湾建设》2022年第1期30-35,共6页China Harbour Engineering

基　　金：中交一航局科技研发项目(2016-9-3)。

摘　　要：基于宏电池腐蚀理论,将阴极钢筋和阳极钢筋分别浇筑在2个独立的混凝土试块中,用导线的连接或断开来模拟宏电池腐蚀或微电池腐蚀。通过改变混凝土试块中氯离子含量,使阴极钢筋和阳极钢筋呈现出不同的电化学参数,分析阴极钢筋和阳极钢筋的腐蚀电位、宏电池电位差与宏电池电流密度、宏电池极化比率的关系,阐明了钢筋的电化学参数对宏电池腐蚀电流和控制模式的影响,获得了阴极钢筋和阳极钢筋的面积比为1时的宏电池腐蚀控制模式转变的分界线关系。Based on the theory of macro-cell corrosion,cathodic steels and anodic steels were cast in two separated concrete blocks and were connected and disconnected by lead wires to simulate the macro-cell corrosion and micro-cell corrosion.By changing the chloride ion content in the concrete blocks,the cathodic steels and anodic steels show different electrochemical parameters.By analyzing the relationships between the corrosion potential,macro-cell potential difference,macro-cell current density and the macro-cell polarization ratio,the influence of electrochemical parameters of steels on the macro-cell corrosion current and control mode was clarified,and the transformation boundary of the macro-cell corrosion control mode when the area ratio of cathodic steels to anodic steels is 1 was obtained.

关 键 词：混凝土 钢筋宏电池腐蚀 电化学参数 电位差 极化比率 控制模式 

分 类 号：U654[交通运输工程—港口、海岸及近海工程]