| 混凝土模拟液中钢筋腐蚀电化学测试结果比较 |
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| 引用本文： | 耿国庆,施锦杰,孙伟.混凝土模拟液中钢筋腐蚀电化学测试结果比较[J].东南大学学报(自然科学版),2011,41(2). |
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| 作者姓名： | 耿国庆 施锦杰 孙伟 |
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| 作者单位： | 东南大学江苏省土木工程材料重点实验室,南京,211189 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)资助项目 |
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| 摘 要： | 为了研究电化学噪声(ENM)、电化学阻抗谱(EIS)和线性极化(LPR)3种方法对混凝土中钢筋锈蚀情况评价的可靠性,采用不同Cl-浓度的高碱性模拟液对钢筋进行浸泡,在钝化期和腐蚀期分别用3种方法测试了极化电阻,并分析了不同方法对腐蚀机理的表征.结果表明:3种方法得出的极化电阻值比较接近;当体系处于活化腐蚀状态时,ENM和LPR结果符合较好,EIS结果略小;当体系处于钝化状态时,EIS和LPR结果吻合,而ENM结果明显偏小;ENM和EIS对腐蚀机理的表征是一致的.3种方法对钢筋腐蚀的评价均具有较高的可靠性.
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| 关 键 词： | 钢筋腐蚀 模拟混凝土孔溶液 电化学噪声 电化学阻抗谱 线性极化 |
Comparison of electrochemical measurements for steel corrosion in simulated concrete pore solution |
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| Geng Guoqing Shi Jinjie Sun Wei.Comparison of electrochemical measurements for steel corrosion in simulated concrete pore solution[J].Journal of Southeast University(Natural Science Edition),2011,41(2). |
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| Authors: | Geng Guoqing Shi Jinjie Sun Wei |
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| Institution: | Geng Guoqing Shi Jinjie Sun Wei (Jiangsu Key Laboratory of Construction Materials,Southeast University,Nanjing 211189,China) |
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| Abstract: | Three electrochemical methods,namely electrochemical noise measurement(ENM),electrochemical impedance spectroscopy(EIS) and linear polarization resistance(LPR) are used to study the corrosion behavior of reinforcing steel in simulated concrete pore solution(SCP) of high pH value and various chloride concentrations.Their reliability is judged by comparing the polarization resistance,as well as the corrosion mechanism,obtained by each method.The results indicate that the polarization resistances of three meth... |
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| Keywords: | reinforcing steel corrosion simulated concrete pore solution electrochemical noise measurement(ENM) electrochemical impedance spectroscopy(EIS) linear polarization resistance(LPR) |
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