CORROSION INHIBITORS FOR COOLING WATER APPLICATIONS

摘要

A new corrosion inhibitor composition containing a carboxylic acid and its water soluble salts with zinc can be used for corrosion inhibition on the carbon steel pipe and heat exchangers in industrial cooling water. This new composition of matter contains less carboxylic acid and Zn2+ than previous formulations and still have > 90% corrosion inhibition. It is disclosed that the synergistic effect of combining the carboxylic acid with very small amounts of Zn results in a product with good corrosion inhibition properties that is more environmentally friendly than the current common phosphonate corrosion inhibitors; particularly for use in cooling water applications.