Corrosion inhibitors including calcium hydroxide have been used to prevent corrosion in the pipes for tap water supply. The corrosion index (i.e., Langelier Index) differs by area and water quality. The corrosion indices of the areas studied differed by more than 2.0. The ‘homogenized’ calcium hydroxide was added to the treated water at the K water treatment plant, in order to increase the value of the corrosion index and the concentration of calcium. As the result, the concentration of calcium was increased while the turbidity and pH changed little. The corrosion rate of the tap water with the 'homogenized' calcium hydroxide could be slowed down pretty much. The results suggested that the technology of 'homogenization' of calcium hydroxide can applied to tap water and desalinated water to prevent corrosion in water pipes even in corrosive pipes.

ABSTRACT
 1. 서 론
 2. 실험 및 분석
  2.1 대상 시료
  2.2 분산화장치 및 현장 적용 실험장치 구성
  2.3 부식제어 실증 플랜트 실험장치 구성 및 분석
 2.4 분석 방법
 3. 결과 및 고찰
  3.1 지방정수장별 수질분석 결과
  3.2 K 정수장 칼슘주입에 대한 현장 파일롯 실험 결과
  3.3 부식제어 실증 플랜트를 이용한 석회수 용해기술 평가 결과
 4. 결 론
 References

• 한금석(서울물연구원, 숭실대학교 화학공학부) | Keum-Seok Han Corresponding author
• 박영복(서울물연구원) | Young-Bok Park
• 김성재(서울물연구원) | Seong-Jae Kim
• 김현돈(서울물연구원) | Hyen-Don Kim
• 최영준(서울물연구원) | Young-June Choi
• 박주현(국립환경과학원) | Ju-Hyun Park
• 우달식((주)아름다운환경) | Dal-sik Woo
• 홍성호(숭실대학교 화학공학부) | Seong-Ho Hong