Studies on the Concrete Reinforcement Corrosion by Electrochemical Impedance Spectroscopy

전기화학적 임피던스법에 의한 철근콘크리트의 부식연구

  • 강태혁 (홍익대학교 화학공학과) ;
  • 조원일 (한국과학기술연구원 전지.연료전지 센터) ;
  • 조병원 (한국과학기술연구원 전지.연료전지 센터) ;
  • 주재백 (홍익대학교 화학공학과) ;
  • 윤경석 (한국과학기술연구원 전지.연료전지 센터)
  • Received : 1997.05.21
  • Accepted : 1998.08.04
  • Published : 1998.11.10

Abstract

Corrosion behavior of steel reinforcements embedded in concrete containing various chloride ion concentrations was investigated by an electrochemical impedance spectroscopy(EIS). Chloride ions were introduced into the concrete by dissolving the NaCl and $CaCl_2$ in the water with a given weight of cement. Based on the impedance parameters measured by EIS, more complete equivalent circuit, a schematic physical model, and the mechanism of concrete reinforcement corrosion were suggested. By the implement of experimental impedance parameters obtained from the model with corresponding CNLS-fitting data, the corrosion rate of steel reinforcement with chloride ions could be predicted.

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