Journal of Failure Analysis and Prevention

, Volume 17, Issue 6, pp 1139–1148 | Cite as

Corrosion Failure of the External Surface of Chlorinator’s Copper Pipes in a Water Disinfection Station

  • Sajjad Bordbar
  • Mostafa Alizadeh
  • Masoud Iranmanesh
Technical Article---Peer-Reviewed
  • 98 Downloads

Abstract

This work investigates the corrosion failure of the chlorinator’s copper pipes in a rural water disinfection station. For this purpose, some corroded samples were provided from the failed pipes and investigated using the X-ray diffraction (XRD) and the scanning electron microscope (SEM) equipped with the energy-dispersive X-ray spectroscopy (EDS). Also, an experimental setup was designed to study the role of the electrolyte formation on the copper pipes. This experimental setup demonstrated that the main factor of pipe failure was the formation of a corrosive electrolyte layer with varying chlorine (presented due to gas leakage) concentration during a day. The electrochemical impedance spectroscopy (EIS) confirmed that variations in the chlorine concentration had an unexpected effect on the corrosion rate. Furthermore, it was found that the main phase in the corrosion products was cupric chloride hydroxide (Cu2(OH)3Cl) with many porosities and cracks. These defects provide suitable places for the formation of the corrosive electrolyte and the following corrosion which ultimately led to the failure of the copper pipes.

Keywords

Corrosion Chloride Copper Water treatment Hydrochloric acid Characterization 

Notes

Acknowledgments

The authors acknowledge the financial support provided by Ministry of Energy (Iran), Rural Water and Wastewater Company of Kerman under Contract No. S91/234/5619—March 09, 2013.

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Copyright information

© ASM International 2017

Authors and Affiliations

  • Sajjad Bordbar
    • 1
  • Mostafa Alizadeh
    • 1
  • Masoud Iranmanesh
    • 2
  1. 1.Department of Metals, Institute of Science and High Technology and Environmental SciencesGraduate University of Advanced TechnologyKermanIran
  2. 2.Department of Energy, Institute of Science and High Technology and Environmental SciencesGraduate University of Advanced TechnologyKermanIran

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