AWWA JAW50207
Journal AWWA - Use of Polyphosphate in Corrosion Control
Journal Article by American Water Works Association, 02/01/2000
Cantor, Abigail F.;Denig-Chakroff, David;Vela, Richard R.;Oleinik, Mark G.;Lynch, Daniel L.
Full Description
When polyphosphate blends are added to water systems under certain conditions, leaching of pipe metal into the water may be significantly increased rather than decreased. Case studies of three Wisconsin water utilities uncovered possible negative consequences of using polyphosphate for corrosion control. These experiences suggest that water providers must exercise caution when adding polyphosphate to drinking water systems. Utilities should conduct off-line tests before using polyphosphate, and full-scale systems should be frequently monitored after polyphosphate addition. More research is needed to define the proper use of polyphosphates and to investigate alternatives to polyphosphates. Includes 21 references, table, figures.