AWWA ACE58338

Iron corrosion in water distribution networks is of special concern in the drinking waterindustry because of the large amount of unlined iron pipe that is in use. Corrosion can destroy thepipe, consume oxidants and disinfectants in the water, create scales that increase the energyrequired to deliver water, support biofilm growth, and produce suspensions of iron particles thatgive drinking water a dirty appearance. While factors that affect the corrosion of clean ironsurfaces have been extensively studied, the chemistry of scales that form on the pipe surface,scale reactions that result in the formation of colored water, and the effect of water chemistry onthe properties of the resulting particles are not well understood. The objective of this paper is topresent an overview of a conceptual model to describe the formation and growth of iron scales,and their reactions that lead to colored water. It is intended that the model be used as abasis for changing water quality to minimize colored water formation and as a guide for furtherresearch. Several aspects of the model require verification by further research. Includes 17 references.

Product Details

Edition:

Vol. - No.

Published:

06/15/2003

Number of Pages:

10

File Size:

1 file , 450 KB