Corrosion of metallic surfaces can be reduced or controlled by the addition

of chemical compounds to the corrodent. This form of corrosion control is

called inhibition and the compounds added are known as corrosion inhibitors.

These inhibitors will reduce the rate of either anodic oxidation or cathodic

reduction, or both. The inhibitors themselves form a protective film on the

surface of the metal. It has been postulated that the inhibitors are adsorbed

into the metal surface either by physical (electrostatic) adsorption

or chemosorption.