The purpose of this study was to evaluate the effects of Ca(OH)2 and CO2 additions on the corrosion of metal coupons (ductile iron, galvanized steel, copper and stainless steel). Corrosion rate and released metal ion concentration of ductile iron and galvanized steel was decreased by adjusting alkalinity, calcium hardness and pH with Ca(OH)2 & CO2 additions named CCPP (Calcium Carbonate Precipitation Potential) index control process. But the effects of Ca(OH)2 & CO2 additions on copper and stainless steel were less than those on ductile iron and galvanized steel. When ductile iron coupon was exposed to water treated with Ca(OH)2 & CO2 additions, the main components of corrosion product formed on its surface were CaCO3 and Fe2O3 or Fe3O4, which often reduce the corrosion rate by prohibiting oxygen transport to the metal surface.

• 이재인(부산대학교 환경공학과) | Jae In Lee
• 임진경(부산대학교 환경공학과) | Jin Kyoung Lim
• 서상훈(부산대학교 환경공학과) | Sang Hoon Seo
• 김동윤(부산대학교 환경공학과) | Dong Youn Kim
• 신춘환(동서대학교 환경공학과) | Choon Hwan Shin