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The Effects of Polyphosphate Corrosion Inhibitor and Lime Water to Reduce Red Water for Carbon Steel  

Park, Young-Bog (서울특별시 상수도연구소 배급수연구과)
Kong, Sung-Ho (한양대학교 화학공학과)
Publication Information
Journal of Korean Society of Water and Wastewater / v.19, no.2, 2005 , pp. 228-237 More about this Journal
Abstract
The main purpose of this study was to investigate the red water reducing effects of phosphate based inhibitor when it was applied to water distribution system. The effects of pH, alkalinity, calcium concentration in the reduction of the red water also studied. The most finished water in Korea showed relatively high corrosiveness and was required to introduce some types of corrosion reducing methods such as addition of alkalinity. The precipitation of $CaCO_3$ by addition of $Ca(OH)_2$ formed porous film on the surface of the carbon steel pipes and was displaced easily from the surface of the pipes; on the other hand, addition of zinc phosphate (ZOP) formed reliable film on the surface and reduced iron release and color. Although the main function of ZOP was to suppress the release of Pb and Cu, it also reduced iron concentration released from water distribution pipes.
Keywords
Langelier index; red water; phosphate inhibitor; tap water; corrosion control;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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