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Analysis of Copper Pitting Failure in Drinking Water Distribution System

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Abstract

Electrochemical tests, as well as surface and chemical analysis were used to investigate the cause of pitting failure of copper tubing in a drinking water distribution system. The results show that localized pitting was the cause of failure and copper corrosion problems were observed under a green deposit. The pitting corrosion was associated with the Cl− and SO4 2− ions introduced by the water softening treatment. These ions promoted the corrosion and the influence of Cl− ion was much greater than that of the SO4 2− ion.

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Authors and Affiliations

  1. Center of Corrosion and Protection, University of Science and Technology Beijing, Beijing, China

    Zhijun Jia, Cuiwei Du, Dongdong Zhang & Xiaogang Li

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  1. Zhijun Jia
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  2. Cuiwei Du
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  3. Dongdong Zhang
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  4. Xiaogang Li
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Correspondence to Zhijun Jia.

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Jia, Z., Du, C., Zhang, D. et al. Analysis of Copper Pitting Failure in Drinking Water Distribution System. J Fail. Anal. and Preven. 11, 152–157 (2011). https://doi.org/10.1007/s11668-010-9415-y

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  • DOI: https://doi.org/10.1007/s11668-010-9415-y

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