Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Internal Corrosion Control of Drinking Water Pipes by pH and Alkalinity Control and Corrosion Inhibitor

수질제어 및 부식억제제에 의한 상수도관의 내부부식 제어

  • 구성은 ((재)한국계면공학연구소) ;
  • 우달식 ((재)한국계면공학연구소) ;
  • 이두진 (한국수자원공사, 수자원연구원) ;
  • 김주환 (한국수자원공사, 수자원연구원) ;
  • 안효원 (한국수자원공사, 수자원연구원) ;
  • 문광순 ((재)한국계면공학연구소)
  • Received : 2005.12.02
  • Accepted : 2006.04.11
  • Published : 2006.04.15
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Abstract

The internal corrosion of water distribution systems is the main cause for the problem of the public health threat as well as water leakage in the damaged pipeline, red water, and odor and taste of the tap water. This study was examined the effect of chemicals used for pH and alkalinity control and corrosion inhibitors for producing the optimal corrosion control method. Corrosion study at different pH and alkalinity indicated that these control using alkaline chemicals was effective in corrosion rate, Fe release reduction, but examined to be increased in turbidity and corrosion-by-products(TTHMs) problems. The turbidity was slightly increased, requiring caution in controlling corrosion with $Ca(OH)_2$. At pH 9.0, TTHMs concentration is increased two times corn pared with non-control of pH. Using the pipe which had experienced 28 years of exposure, iron release was decreased with the corrosion inhibitor. Consequently, pH, Alkalinity control method using alkaline chemicals must be complemented by corrosion inhibitor application for efficient corrosion control.

Keywords

References

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