Influence of solid corrosion by-products on the consumption of dissolved oxygen in copper pipes

Research on corrosion of copper pipes has given little consideration to the influence of solid corrosion by-products on the processes occurring at the metal–liquid interface. Consequently, the effect of such solid phases on the rate of dissolved oxygen (DO) consumption remains poorly understood. In-...

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Bibliographic Details
Published in:Corrosion science 2009-05, Vol.51 (5), p.1030-1037
Main Authors: Vargas, Ignacio T., Alsina, Marco A., Pastén, Pablo A., Pizarro, Gonzalo E.
Format: Article
Language:English
Subjects:
A. Copper
AGING
Applied sciences
ATOMIC AND MOLECULAR PHYSICS
B. SEM
BY-PRODUCTS
C. Oxidation
C. Passive films
CARBONATES
COPPER
CORROSION
Corrosion environments
DISSOLVED GASES
DRINKING WATER
Exact sciences and technology
HYDROGEN IONS
HYPOTHESIS
Metals. Metallurgy
OXYGEN
PIPES
SOLIDS
STAGNATION
SUPPORTS
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Summary:Research on corrosion of copper pipes has given little consideration to the influence of solid corrosion by-products on the processes occurring at the metal–liquid interface. Consequently, the effect of such solid phases on the rate of dissolved oxygen (DO) consumption remains poorly understood. In-situ experiments were performed in copper pipes under different carbonate concentrations and ageing times. Our results show that the amount of solid corrosion by-products and concentration of hydrogen ions affect the rate of DO consumption during stagnation. Furthermore, our findings support the existing hypothesis that the available concentration of hydrogen ions, rather than DO, is the limiting factor for copper release into drinking water.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2009.02.014