A Novel Non-Phosphorous Cooling Water Treatment Program with Robust Scaling and Corrosion Control

摘要

Currently, most cooling water treatment programs utilize phosphate for corrosion control and apply scale inhibitor to reduce the potential calcium phosphate deposition on heat exchangers. A non-phosphorus program would reduce or eliminate the need for calcium phosphate scale inhibitor and reduce phosphorus nutrientfeed to the system, which would control bio-growth. However, the existing non-phosphorus programs for cooling water treatment often have disadvantages such as poor mild steel corrosion control, limited operation window, and high treatment cost. This paper describes a newly developed non-phosphorus program to solve these challenges. This novel program is a blend of proprietary scale and corrosion inhibitors. It provides excellent anodic and cathodi c corrosion control of mild steel in a variety of water matrices (from soft water to high chloride water), and it widens the operation window by providing superior calcium carbonate inhibition and eliminating calcium phosphate scale. The non-P program showed great corrosion and scale control performance when evaluated at a steel mill and a power plant.