A nitrogen-containing organic compound replaces chromate in corrosion inhibitors. Process and Waste Information Corrosion inhibitors provide protection against corrosion of heated steel tubes and coupons in aqueous media. 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. The clean technology is fully implemented. Information on feedstock, energy, and water use is not provided.