Copper pitting in chlorinated, high-pH potable water

Copper pitting corrosion in potable water systems poses economic and environmental problems associated with pinhole leaks. In the laboratory it has proven difficult to reproduce the precise conditions that create pinholes; to date, aggressive water quality (i.e., chlorinated water of high pH and low...

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Published in:Journal - American Water Works Association 2011-03, Vol.103 (3), p.86-98
Main Authors: SARVER, EMILY, DODSON, KARA, SCARDINA, R. PAOLO, LATTYAK-SLABAUGH, REBECCA, EDWARDS, MARC, NGUYEN, CAROLINE
Format: Article
Language:English
Subjects:
Alkalinity
Aluminum
Chemistry
Chlorine
Control loops
Copper
Corrosion
Drinking water
Flow velocity
Hardness
Inspections
Laboratories
Phosphates
Pipes
Pitting
Plumbing Systems
Potable water
Silica
Studies
Test methods
Water quality
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cited_by cdi_FETCH-LOGICAL-c4023-f2703fd0b1c9ec4d8b229830bee48660164d78aa891636da1d0449d809b910163
cites cdi_FETCH-LOGICAL-c4023-f2703fd0b1c9ec4d8b229830bee48660164d78aa891636da1d0449d809b910163
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container_issue 3
container_start_page 86
container_title Journal - American Water Works Association
container_volume 103
creator SARVER, EMILY
DODSON, KARA
SCARDINA, R. PAOLO
LATTYAK-SLABAUGH, REBECCA
EDWARDS, MARC
NGUYEN, CAROLINE
description Copper pitting corrosion in potable water systems poses economic and environmental problems associated with pinhole leaks. In the laboratory it has proven difficult to reproduce the precise conditions that create pinholes; to date, aggressive water quality (i.e., chlorinated water of high pH and low alkalinity) is the only cause that has been replicated as it occurs in potable water systems. Pitting in this type of water is accelerated with higher chlorine, flow velocities, and durations and is inhibited by high levels of silica and phosphate. Although only results from forensic testing (e.g., pipe loops) can be interpreted with complete confidence, the numerous limitations of such testing might be overcome via complementary studies using sophisticated electrochemical methods once aggressive waters are identified. Under worst‐case conditions, pipe loops can reproducibly create pitting in relatively short times and on very short copper tubes.
doi_str_mv 10.1002/j.1551-8833.2011.tb11423.x
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source JSTOR Archival Journals and Primary Sources Collection; Wiley-Blackwell Read & Publish Collection
subjects Alkalinity
Aluminum
Chemistry
Chlorine
Control loops
Copper
Corrosion
Drinking water
Flow velocity
Hardness
Inspections
Laboratories
Phosphates
Pipes
Pitting
Plumbing Systems
Potable water
Silica
Studies
Test methods
Water quality
title Copper pitting in chlorinated, high-pH potable water
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