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Title |
Effect of Total Resistance of Electrochemical Cell on Electrochemical Impedance of Reinforced Concrete Using a Three-Electrode System
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Authors |
무함마드 알 마스루르 칸(Md. Al-Masrur Khan) ; 김제경(Je-Kyoung Kim) ; 이정재(Jurng-Jae Yee) ; 기성훈(Seong-Hoon Kee) |
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DOI |
https://doi.org/10.11112/jksmi.2022.26.6.82 |
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Keywords |
3전극; 전기화학적 임피던스분광법; 셀저항; 염해; 철근 부식; 콘크리트 Three electrode system; EIS; Cell resistance; Chloride-induced deterioration; Corrosion of steel; Concrete |
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Abstract |
This study aims to investigate the effect of total electrochemical cell resistance (TECR) on electrochemical impedance (EI) measurementsof reinforced concrete (RC) by electrochemical impedance spectroscopy (EIS) using a three-electrode system. A series of experimental study is performedto measure electrochemical behavior of a steel bar embedded in a concrete cube specimen, with a side length of 200 mm, in various experimentalconditions. Main variables include concrete dry conditions, coupling resistance between sensing electrodes and concrete surface, and area of the counterelectrode. It is demonstrated that EI values remains stable when the compliant voltage of a measuring device is sufficiently great compared to the potentialdrop caused by TECR of concrete specimens. It is confirmed that the effect of the coupling resistance of TECR is far more influential than other twofactors (concrete dry conditions and area of the counter electrode). The results in this study can be used as a fundamental basis for development of asurface-mount sensor for corrosion monitoring of reinforced concrete structures exposed to wet-and-dry cycles under marine environment.
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