模拟混凝土孔溶液中钢筋腐蚀与等效电路选取  

Corrosion of Steel in Simulated Concrete Pore Solution and Equivalent Circuits Selection

作　　者：刘国建 张云升[2] 刘诚 吴萌 逄博 LIU Guojian;ZHANG Yunsheng;LIU Cheng;WU Meng;PANG Bo(School of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215011,China;School of Materials Science and Engineering,Southeast University,Nanjing 211189,China)

机构地区：[1]苏州科技大学土木工程学院,苏州215011 [2]东南大学材料科学与工程学院,南京211189

出　　处：《材料导报》2021年第14期14072-14078,共7页Materials Reports

基　　金：国家自然科学基金(52008284);江苏省高等学校自然科学研究项目(20KJB560004);国家973计划(2015CB655100)。

摘　　要：针对混凝土模拟孔溶液中钢筋腐蚀电化学阻抗响应,采用Kramers-Kronig转换对电化学阻抗数据进行了验证,定性、定量地讨论了模拟混凝土孔溶液中钢筋腐蚀等效模拟电路的选取原则。结果表明:试验中电化学阻抗数据线性、因果性、稳定性良好;经过视觉检验、卡方值检验、关键参数拟合值演变规律检验等步骤,可选出拟合结果良好且符合试验规律的电化学阻抗等效模拟电路R(Q(R(QR))),建议卡方值取值为10-4数量级。Kramers-Kronig transform was applied to verify electrochemical impedance spectroscopy(EIS)data of steel corrosion in simulated concrete pore solution.The basic principles to determine optimal equivalent circuit for interpretation of EIS data were established based on qualitative and quantitative discussions.Results showed that EIS data in present study conform to linearity,causality and stability.Through visual inspection,Chi-square method and key simulated parameters evolution check,the equivalent circuit of R(Q(R(QR)))proved to be optimal to simulate the EIS data of corrosion process in simulated pore solution.Additionally,Chi-square value was suggested to be within the range of 10-4 order of magnitude.

关 键 词：混凝土 模拟孔溶液 钢筋腐蚀 电化学阻抗 

分 类 号：TU528[建筑科学—建筑技术科学]