Corrosion of Steel in Simulated Concrete Pore Solution and Equivalent Circuits Selection
LIU Guojian1,*, ZHANG Yunsheng2, LIU Cheng2, WU Meng2, PANG Bo2
1 School of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215011, China 2 School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
Abstract: 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.
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2021, Vol. 35 
