corrosion inhibitor

A corrosion inhibitor is a chemical compound that, when added in small concentration, stops or slows down corrosion of metals and alloys.A typical good corrosion inhibitor will give 95% inhibition at concentration of 80 ppm, and 90 t 40 ppm. Some of the mechanisms of its effect are formation of a passivation layer (a thin film on the surface of the material that stops access of the corrosive substance to the metal), inhibiting either the oxidation or reduction part of the redox corrosion system (anodic and cathodic inhibitors), or scavenging the dissolved oxygen.
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