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CHARACTERIZING THE PIPE WALL DEMAND FOR FREE CHLORINE IN METALLIC PIPES
Citation:
Clark, R. M. AND R C. Haught*. CHARACTERIZING THE PIPE WALL DEMAND FOR FREE CHLORINE IN METALLIC PIPES. Presented at ASCE/EWRI, 6th Annua. Symposium Session 11, Water Quality Models and Impacts, Salt Lake City, UT, June 27 - July 01, 2004.
Impact/Purpose:
To inform the public
Description:
As water moves through distribution system water quality deterioration can take place in the bulk phase or through interactions at the pipe wall. These transformations can be physical, chemical or microbiological in nature. Perhaps one of the most serious aspects of quality deterioration is the loss of disinfectant residual that may take place in the system and which can weaken the barrier against microbial contamination. A factor frequently cited as contributing to water deterioration is internal corrosion of the pipe wall material.
Internal corrosion is the deterioration of the inside wall or lining of a pipe caused by reactions with water. This deterioration can be the result of physical action that erodes the lining or surface coating of a pipe, chemical dissolution that leaches a pipe's lining or wall material, or electrochemical reactions that remove metal from the wall of the pipe.