Corrosion Inhibitors

Corrosion inhibitor is a chemical compound that, when added in small concentration, stops or slows down corrosion (rust) of metals, alloys, pipes and pipelines. There are two kinds of corrosion inhibitor: filmer and neutralizer amine.

  • Filmer Amine

A typical good corrosion inhibitor will give inhibition protection. 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 (removing) the dissolved oxygen. It works in special range of pH (acidity).

  • Neutralizing Amine

Organic neutralizing amines are commonly used to combat corrosion in refinery crude column overhead systems by pH (acidity) controlling and providing suitable pH for filmer performance. Refinery crude column overhead system is a place that lighter and more volatile compounds go and accumulate there. These light compounds are generally coming with some corrosive substances such as HCl, H2S. This is why overhead is the most important part in refineries.