한국가스학회:학술대회논문집

한국가스학회 (The Korean Institute of GAS)
권호 표지

혐기성 토양에 서식하는 황산염환원세균에 의한 가스배관의 미생물부식

CORROSION OF STEEL GAS PIPELINE INDUCED BY SULFATE-REDUCING BACTERIA IN ANAEROBIC SOIL

  • 이선엽 (한국가스공사 연구개발원) ;
  • 전경수 (한국가스공사 연구개발원) ;
  • 고영태 (한국가스공사 연구개발원) ;
  • 강탁 (서울대학교 공과대학 재료공학부)
  • Li SeonYeob (Korea Gas Corporation (KOGAS)) ;
  • Jeon KyungSoo (Korea Gas Corporation (KOGAS)) ;
  • Kho YoungTai (Korea Gas Corporation (KOGAS)) ;
  • Kang Tak (School of Material Science and Engineering, College of Engineering, Seoul National University (SNU))
  • 발행 : 2001.10.01
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초록

Microbiologically influenced corrosion (MIC) of carbon steel gas pipeline in soil environments was investigated at field and laboratory MIC is very severe corrosion and it is not easy to distinguish this corrosion from Inorganic corrosion because of its localized, pitting-type character Therefore, it is important to provide proper assessment techniques for the prediction, detection, monitoring and mitigation of MIC. It is possible to predict the MIC risk, i.e., the activity of sulfate-reducing bacteria (SRB) through the analysis of soil environments. Chemical, microbiological and surface analysis of corrosion products and metal attacked could reveal the possibility of the occurrence of MIC. Various electrochemical and surface analysis techniques could be used for the study of MIC. Among these techniques, thin-film electrical resistance (ER) type sensors are promising to obtain localized corrosion rate of MIC induced by SRB. It is also important to study the effect of cathodic protection (CP) on the MIC In case of coated pipeline, the relationship between coating disbondment and the activity of SRB beneath the disbanded coating is also important.

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