Failure Analysis of Pitted Copper Pipes Used in Underground Water and Preventive Measures

Nam, Gi-ho; Lee, Jong-kwon; Kim, Kyung-ja

doi:10.1007/s12540-018-0038-2

Cited by 5 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Bacterial cells were observed at the bottom of the pits. Nam, Lee, and Kim (2018) provided several lines of evidence suggesting that biological processes contribute to copper corrosion and may be linked to pitting. Some evidence of the role of microbial activity on uniform copper corrosion was provided by Pavissich, Vargas, González, Pastén, and Pizarro (2010), who observed higher copper concentrations in pipes inoculated with microbecontaining water.…”

Section: Microbial Aspectsmentioning

confidence: 99%

See 1 more Smart Citation

A 30‐year review of copper pitting corrosion and pinhole leaks: Achievements and research gaps

Gibson

Karney

2021

AWWA Water Science

View full text Add to dashboard Cite

Despite decades of research, the pitting of copper pipes is poorly understood. This article summarizes the key research findings from 1990 to the present and identifies research gaps. Several lines of evidence suggest that, for soft waters, additional alkalinity or maintaining a pH <8.5 may reduce copper pitting. Phosphate corrosion inhibitors, used to prevent lead corrosion, may also moderate copper pitting in low-alkalinity waters. However, such inhibitors could also exacerbate pitting due to insufficient coverage or could increase biological growth. Biological processes are likely involved in pitting corrosion, and practices to reduce biological growth may be beneficial. The research gaps identified include a need for better benchmarking, the effects of chemical transients (e.g., chlorine burns) and of hydraulic transients (e.g., water hammer), and changing the residual disinfectant from chlorine to chloramine.

show abstract

Section: Microbial Aspectsmentioning

confidence: 99%

“…Biological processes are definitely involved in copper corrosion (Bremer et al, 2001;Keevil, 2004;Nam et al, 2018) and likely play some role in pitting corrosion (Burleigh et al, 2014). In general, reducing the organic carbon content of the water will reduce the food available for microorganisms to grow.…”

Section: Microbial Aspectsmentioning

confidence: 99%