Non-Chromate Corrosion Inhibitors for Cooling Towers. Cooling towers are typical places where inhibitors work to prevent corrosion and scaling.
Corrosion inhibitors containing chromates and phosphates contribute to a plant's pollution load.
Non-chromate corrosion inhibitors contain nitrogen and were developed in response to the pollution issue. Laboratory results and four case histories demonstrate the effectiveness of non-chromate corrosion inhibitors in reducing corrosion and scaling in cooling towers. These materials were also found to be low in toxicity, high in stability, and compatible with chlorine and other biocides. Economic benefits are not quantified in the report. Also, nitrogen-based inhibitors will eventually require treatment before discharge to the environment.