An Evaluation of Corrosion Control Additives for Potable RO Permeate

Corrosion coupon studies were performed on the finished water of various plants on the East Coast
of Florida. Of those plants, three produced finished water consisting of Reverse Osmosis (RO)
permeate blended with filtered feedwater, one plant blended RO permeate with lime softened water,
and one plant produced only lime softened water. The purpose of the study was to compare polyphosphate containing corrosion inhibitors against zinc based inhibitors.

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