한국가스학회:학술대회논문집

The Korean Institute of GAS (한국가스학회)
권호 표지

Corrosion Rate of Buried Pipeline by Induced Alternating Current

교류가 유도되는 매설배관에서의 교류 부식속도 측정에 관한 연구

  • Song H. S. (R&D Center of Korea Gas Corporation) ;
  • Kim Y. G. (R&D Center of Korea Gas Corporation) ;
  • Lee S. M. (R&D Center of Korea Gas Corporation) ;
  • Kho Y. T. (R&D Center of Korea Gas Corporation) ;
  • Park Y. S. (Department of Metallurgical Engineering, Yonsei Univ.)
  • 송홍석 (한국가스공사 연구개발원) ;
  • 김영근 (한국가스공사 연구개발원) ;
  • 이성민 (한국가스공사 연구개발원) ;
  • 고영태 (한국가스공사 연구개발원) ;
  • 박용수 (연세대학교 금속공학과)
  • Published : 2001.10.01
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Abstract

An alternating current (AC) corrosion using coupon has been studied. Coupons were applied in terms of AC voltage from high value to low value through the survey of AC voltages on buried gas transmission pipeline over the country. Parameters such as AC current density of coupon, AC voltage, cathodic protection potential, soil resistivity and frequency were monitored continually. Corrosion induced by AC was observed even under cathodically protected condition that met cathodic protection criterion(: below -850mv vs. CSE). Corrosion rate was affected mainly not by AC voltage but by both of frequency and AC current density. An experimental corrosion rate relationship could be obtained statistically, in which AC corrosion rate increased linearly with effective AC current density and its slope was 0.619.

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