Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
권호 표지
DOI QR코드

DOI QR Code

Corrosion control technology in water pipes by adjusting the corrosivity of drinking water : effect and impact of the lime dispersion system

수돗물 부식성 제어를 통한 수도관 부식방지기술: 석회수 분산화장치를 이용한 미네랄 공급 효과와 영향 분석

  • Received : 2018.02.27
  • Accepted : 2018.03.29
  • Published : 2018.06.15
Download PDF
⟨ Previous Next ⟩

Abstract

Corrosion inhibitors including calcium hydroxide have been used to prevent corrosion in the pipes for tap water supply. The corrosion index (i.e., Langelier Index) differs by area and water quality. The corrosion indices of the areas studied differed by more than 2.0. The 'homogenized' calcium hydroxide was added to the treated water at the K water treatment plant, in order to increase the value of the corrosion index and the concentration of calcium. As the result, the concentration of calcium was increased while the turbidity and pH changed little. The corrosion rate of the tap water with the 'homogenized' calcium hydroxide could be slowed down pretty much. The results suggested that the technology of 'homogenization' of calcium hydroxide can applied to tap water and desalinated water to prevent corrosion in water pipes even in corrosive pipes.

Keywords

Acknowledgement

Supported by : 환경부, 국립환경과학원

References

  1. Ahn, J.C., Park, C.M., Koo, J.Y. (2005). Modeling and Application of Chlorine Bulk Decay in Drinking Water Distribution System, J. Korean Soc. Water Wastewater, 19(4), 487-496.
  2. ASTM Standards G1. (1996). Standard Practice for Preparing, Cleaning, and Evaluating, Corrosion Test Specimens, 9-15.
  3. AWWARF and DVGW 2nd ed. (1996). Internal Corrosion of Water Distribution Systems, USA. 406.
  4. Bum, M. L. (2013). The Effect of rain fall characteristics at drainage area on the corrosioninde, master's Thesis, Dankook university, Chon-an, Korea, 10-11.
  5. Cheong, W.S., Kim, J.K., Park, D.J., Kim, S.W., Jeong, S.G. (2011). A study on the corrosion control of tap water by lime and carbon dioxide, J. Korean Soc. Water Wastewater, 25(2), 193-199.
  6. Denny A. Jones (1996). Principles and Prevention of CORROSION, prentice Hall, USA. 31-34.
  7. Fact Sheet - The National Lime Association, https://www.lime.org/documents/lime.../lime-physical-chemical.pdf (February 22, 2018).
  8. Kim, D.H., Yu, D.C., Son, H.J., Jang, K.H., Yu, J.S., Lee, K.S. (2017). "Mineral(Ca) injection and corrosive water control in seawater desalination process", The CSSK Autumn Meeting & Automobile Corrosion Symposium Technical Meeting Abstracts, 02-03 November, 2017, Inchon, Korea, The Corrosion Science Society of Korea.
  9. Kim, J.K., Kim, Y.K. (2011). Characteristics and improvement of tap water corrosivity in Korea, J. Korean Soc. Water Wastewater, 25(5), 731-739.
  10. McNeill, L. and Edward, M. (2001). Iron Pipe Corrosion in Distribution Systems, J. Am. Water Work Assoc., 88-100.
  11. Park, Y.B., Kim, S.J., Han, K.S., Kim, H.D., Choi, Y.J. (2017). "Corrosion Control in Water Treatment Process through $Ca(OH)_2$ Solubility Enhancement", The CSSK spring Meeting and Erosion Corrosion Symposium.Forum, 08-09 June, 2017, Jeju, Korea, The Corrosion Science Society of Korea.
  12. Park, Y.B., Park, J.H., Park, E.H., Lee, J.S., Kim, H.T., Choi, Y.J., Chung, H.M., Huh, Y.J., Choi, I.C. (2016). Corrosion Control Water Pipes by Adisuting the Corrosivity of Drinking Water : Effect and impact of the Corrosion inhibitor, the Corrosion Science Society of Technology, 15(6), 303-310. https://doi.org/10.14773/cst.2016.15.6.303
  13. Tokyo metropolitan government(TMG), Bureau of waterworks (2017). www.waterworks.met\-ro.tokyo.jp (February 22, 2018).
  14. Yu, S.J, Park, S.J., Kim, H.K., Ahn, K.H., Lee, Y.H., Kim, C.S., National Institute of Environmental Research. (2008). Study of the Secondary Contamination in the Water Distribution Pipeline, 69.