Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
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-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. A key task for further research would be to characterize the nature and reactivity of the corrosion scales, incorporating the effects of pH as a limiting factor for both the oxidation process and the rate of DO consumption for a wider range of water conditions. Indeed, the implications of this work should be tested for different pH, carbonate concentrations, and the presence of other oxidants in water (e.g. residual chlorine). In addition, efforts should also be aimed at evaluating the effect of transport by diffusion in the experimental observations of DO consumption. This fact will allow us to associate bulk water measurements with the processes that occur at the metal-liquid interface.
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-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. A key task for further research would be to characterize the nature and reactivity of the corrosion scales, incorporating the effects of pH as a limiting factor for both the oxidation process and the rate of DO consumption for a wider range of water conditions. Indeed, the implications of this work should be tested for different pH, carbonate concentrations, and the presence of other oxidants in water (e.g. residual chlorine). In addition, efforts should also be aimed at evaluating the effect of transport by diffusion in the experimental observations of DO consumption. This fact will allow us to associate bulk water measurements with the processes that occur at the metal-liquid interface.
Influence of solid corrosion by-products on the consumption of dissolved oxygen in copper pipes
Einfluss von festen Korrosions-Nebenprodukten auf den Verbrauch von gelöstem Sauerstoff in Kupferrohren
Vargas, Ignacio T. (Autor:in) / Alsina, Marco A. (Autor:in) / Pasten, Pablo A. (Autor:in) / Pizarro, Gonzalo E. (Autor:in)
Corrosion Science ; 51 ; 1030-1037
2009
8 Seiten, 7 Bilder, 29 Quellen
Aufsatz (Zeitschrift)
Englisch
Influence of solid corrosion by-products on the consumption of dissolved oxygen in copper pipes
| British Library Online Contents | 2009
Empirical model for dissolved oxygen depletion during corrosion of drinking water copper pipes
| British Library Online Contents | 2010
Effect of Dissolved Oxygen (DO) on Internal Corrosion of Water Pipes
| British Library Online Contents | 2009
| Wiley | 1974