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http://dx.doi.org/10.5668/JEHS.2007.33.1.043

Effects of pH, Alkalinity, Chloride Ion on the Copper Pipe Corrosion  

Jo, Kwan-Hyung (Department of Civil & Environmental Engineering, Chungwoon University)
Kim, Sun-Il (Korea Testing and Research for Chemical Industry)
Woo, Dal-Sik (Korea Interfacial Science and Engineering Institute)
Publication Information
Journal of Environmental Health Sciences / v.33, no.1, 2007 , pp. 43-48 More about this Journal
Abstract
This study investigated the effects of pH, alkalinity, and chlorine ion which are important water quality impact factors to the corrosion in the simulated distribution system where the copper pipe is affixed. The result shows that pitting index was increased as the alkalinity and chloride ion increase in the distilled water, but there was no relation to pH. Actually the uniform corrosion rate was decreased as the pH increase with the laboratory tap water. In conclusion, it is necessary to control the pH which stands above minimum 7.5 to prevent pitting corrosion in the copper pipe. Consequently, comprehensive research about the effect of lime soda($Ca(OH)_2$) which was used as a coagulation additive in the water treatment plant to pipe corrosion must be accomplished additionally.
Keywords
pitting corrosion; pitting index; alkalinity; chloride ion; distribution system;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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