Electrochemical Impedance Study on the Rebar Corrosion in Cement Mortar Containing Chloride Ions

전기화학적 임피던스법을 이용한 염함유 시멘트 모르터내의 철근부식 연구

  • 남상철 (고려대학교 화학공학과) ;
  • 백지흠 (한국과학기술연구원 전지.연료전지센터) ;
  • 조원일 (한국과학기술연구원 전지.연료전지센터) ;
  • 조병원 (한국과학기술연구원 전지.연료전지센터) ;
  • 윤경석 (한국과학기술연구원 전지.연료전지센터) ;
  • 전해수 (고려대학교 화학공학과)
  • Received : 1998.03.13
  • Accepted : 1998.08.04
  • Published : 1998.11.10

Abstract

Rebar corrosion in cement mortar containing chloride ions was investigated by electrochemical AC impedance spectroscopy. Corrosion of mild steel bar was accelerated by an acceleration test equipment in short period. Impedance values obtained from AC-impedance method could be adapted to the proposed electrochemical equivalent circuit model and they were consistent with calculated values obtained by CNLS fitting method. The weight loss of rebar could be calculated by charge transfer resistance($R_2$) with time and it was close to real value.

Acknowledgement

Grant : 방재기술 개발사업

Supported by : 과학기술처

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