The tap water is generally known to be corrosive in the pH range at 6.5 ~ 7.5. And the degree of corrosion varies depending on the types of raw water such as river surface water or lake water of the dam. Although several corrosion index represents the corrosivity of tap water, the typical corrosion indexes such as Langelier saturation index (LI) and calcium carbonate precipitation potential (CCPP) were calculated to monitoring the corrosive water quality about raw and tap water in water distribution system. To control the corrosive water quality, the correlation between corrosion index and water quality factors were examined. In this study, corrosion index (LI, CCPP) and the pH was found to be most highly correlated.

Abstract
 1. 서 론
 2. 실험재료 및 방법
  2.1. 대상지역 및 수질조사 지점
  2.2. 부식지수 및 수질분석
 3. 결과 및 고찰
  3.1. 원·정수의 부식지수 비교
  3.2. 급수계통에서의 부식지수 변화
  3.3. 수질인자와 부식지수와의 상관성 평가
 4. 결 론
 REFERENCE

• 배석문(부산광역시 상수도사업본부 수질연구소) | Seog-Moon Bae (Water Quality Institute, Water Authority)
• 김도환(부산광역시 상수도사업본부 수질연구소) | Do-Hwan Kim (Water Quality Institute, Water Authority)
• 손희종(부산광역시 상수도사업본부 수질연구소) | Hee-Jong Son (Water Quality Institute, Water Authority) Corresponding author
• 최동훈(부산광역시 상수도사업본부 수질연구소) | Dong-Hoon Choi (Water Quality Institute, Water Authority)
• 김익성(부산광역시 상수도사업본부 수질연구소) | Ik-Sung Kim (Water Quality Institute, Water Authority)
• 김경아(부산광역시 상수도사업본부 수질연구소) | Kyung-A Kim (Water Quality Institute, Water Authority)