Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Elucidation of Corrosion and Failure of Stainless Steel Tubing buried in Soil for Potable Water

토양매설 스테인리스강 상수도 배관의 부식원인 규명

  • Kim, Young Sik (Materials Research Center for Clean and Enegy Technology, School of Advanced Materials, Andong National University) ;
  • Park, Soojin (Materials Research Center for Clean and Enegy Technology, School of Advanced Materials, Andong National University) ;
  • Hwangbo, Deok (Materials Research Center for Clean and Enegy Technology, School of Advanced Materials, Andong National University) ;
  • Shin, Mincheol (Materials Research Center for Clean and Enegy Technology, School of Advanced Materials, Andong National University)
  • 김영식 (국립안동대학교 신소재공학부 청정에너지소재기술연구센터) ;
  • 박수진 (국립안동대학교 신소재공학부 청정에너지소재기술연구센터) ;
  • 황보덕 (국립안동대학교 신소재공학부 청정에너지소재기술연구센터) ;
  • 신민철 (국립안동대학교 신소재공학부 청정에너지소재기술연구센터)
  • Received : 2012.01.20
  • Accepted : 2012.02.24
  • Published : 2012.02.29
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Abstract

Since buried pipes contact the soil directly, corrosion by the soil could be occurred. Recently, some stainless steel pipes after 8 years burial at G area were corroded and leaked. In order to elucidate highly corroded phenomena(its rate was about 0.175 mm/y) of these pipes, the investigation for corrosion environment, soil, stray current's effect, and chemical analysis on the pipes were performed. Most of investigated sites were close to traditional water-closet and showed high moisture and thus those areas could be highly corrosive. In the investigation by two kinds of soil evaluation methods, it was revealed that the soils at G areas were highly corrosive, and moreover the contents of sulfate reducing bacteria in the soils were high. Also, open circuit potentials of many pipes showed different values and its potentials were high positive. Therefore, it was considered that corrosion of buried pipes at G area could be affected by high corrosive soil's environment and stray current corrosion.

Keywords

References

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