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Corrosion Characteristics by CCPP Control in Simulated Distribution System  

Kim, Do-Hwan (Sam Young Engineering Consultants Co., LTD.)
Lee, Jae-In (Sam Young Engineering Consultants Co., LTD.)
Lee, Ji-Hyung (Sam Young Engineering Consultants Co., LTD.)
Han, Dong-Yueb (Sam Young Engineering Consultants Co., LTD.)
Kim, Dong-Youn (Department of Environmental Engineering, Pusan National University)
Hong, Soon-Heon (Department of Civil Engineering, Miryang National University)
Publication Information
Abstract
This study was performed to investigate the efficiency of the corrosion prevention in the simulated distribution system using CCPP(Calcium Carbonate Precipitation Potential) as the anti-corrosive index by adjusting pH, total dissolved solids, alkalinity and calcium hardness in the water treatment pilot process. The materials of the simulated distribution system(SDS) were equiped with same materials of real field water distribution system. CCPP concentrations controlled by $Ca(OH)_2$, $CO_2$ gas and $Na_2CO_3$ in the simulated distribution system and uncontrolled by the chemicals in the general water distribution system were average 0.61 mg/L and -7.77 mg/L. The concentrations of heavy metals like Fe, Zn, Cu ions in effluent water of the simulated distribution system controlled with water quality were decreased rather than the general water distribution system uncontrolled with water quality. In simulated distribution system(SDS), corrosion prevention film formed by CCPP control was observed that scale was come into forming six months later and it was formed into density as time goes on. We were analyzed XRD(X-ray diffraction) for investigating component of crystal compounds and structure for galvanized steel pipe(15 mm). Finding on analysis, scale was compounded to $Zn_4CO_3(OH)_6{\cdot}H_2O$ (Zinc Carbonate Hydroxide Hydrate) after ten months late, and it was compounded on $CaCO_3$(Calcium Carbonate) and $ZnCO_3$(Smithsonite) after nineteen months later.
Keywords
Corrosion Prevention; Simulated Distribution System; CCPP(Calcium Carbonate Precipitation Potential); Water Distribution System; Heavy Metal;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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