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Inhibition of Copper Pitting Corrosion in Aggressive Potable Waters
Joint Authors
Source
International Journal of Corrosion
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-08-21
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Abstract EN
Copper pitting corrosion can lead to premature plumbing failures, and can be caused by aggressive potable waters characterized by high pH, free chlorine residual and low alkalinity.
In such waters and under continuous flow, certain inhibitors including phosphate, silica or natural organic matter may greatly reduce pitting occurrence.
In the current work, 1 mg/L phosphate (as P) completely prevented initiation of pits, and 5 mg/L silica (as Si) significantly decelerated pitting.
However, much lower doses of these inhibitors had little benefit and actually accelerated the rate of attack in some cases.
Effects of organic matter were dependent on both the type (e.g., natural versus ozonated humic substances) and dosage.
Dose-response effects of free chlorine and alkalinity were also investigated.
Based on electrochemical data, pits initiated more rapidly with increased free chlorine, but even moderate levels of chlorine (~0.4 mg/L) eventually caused severe pitting.
High alkalinity decreased pit propagation rates but did not prevent pit formation.
American Psychological Association (APA)
Sarver, Emily& Edwards, Marc. 2012. Inhibition of Copper Pitting Corrosion in Aggressive Potable Waters. International Journal of Corrosion،Vol. 2012, no. 2012, pp.1-16.
https://search.emarefa.net/detail/BIM-503854
Modern Language Association (MLA)
Sarver, Emily& Edwards, Marc. Inhibition of Copper Pitting Corrosion in Aggressive Potable Waters. International Journal of Corrosion No. 2012 (2012), pp.1-16.
https://search.emarefa.net/detail/BIM-503854
American Medical Association (AMA)
Sarver, Emily& Edwards, Marc. Inhibition of Copper Pitting Corrosion in Aggressive Potable Waters. International Journal of Corrosion. 2012. Vol. 2012, no. 2012, pp.1-16.
https://search.emarefa.net/detail/BIM-503854
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-503854