Assessment of Soil Characteristics on External Corrosion of Water Pipes

토양특성이 상수도관의 외부부식에 미치는 영향 평가

  • 배철호 (한국수자원공사 수자원연구원) ;
  • 김주환 (한국수자원공사 수자원연구원) ;
  • 박상영 (한국수자원공사 수자원연구원) ;
  • 김정현 (한국수자원공사 수자원연구원) ;
  • 홍성호 (숭실대학교 환경화학공학과) ;
  • 이경재 (한국수자원공사 수자원연구원)
  • Received : 2006.08.12
  • Accepted : 2006.10.11
  • Published : 2006.10.15

Abstract

The goal of this study is to present an external pit corrosion rate($p_{ecr}$) model with considering both the age of pipe and the soil characteristics. The correlation of nonlinear exponential model among conventional empirical models was a little higher than other empirical models in the prediction of $p_{ecr}$ according to the age of pipe. However, there has been a limit to predict Peer with the model by using only a pipe age since installation as a variable. The soil analysis results from sixty nine samples showed that all of the samples were non corrosive in the assessment of ANSI/AWWA scoring system. The correlation of soil corrosion factors and $p_{ecr}$ was also low. The application result of linear and nonlinear regression models that soil characteristics only showed a low correlation with $p_{ecr}$ Proposed nonlinear regression model in this study, with considering both the age of pipe and the soil characteristics, showed a little higher correlation ($R^2=0.46$) than conventional model.

Keywords

References

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