Greener Approach towards Corrosion Inhibition

Abstract

Corrosion control of metals is technically, economically, environmentally, and aesthetically important. The best option is to use inhibitors for protectingmetals and alloys against corrosion. As organic corrosion inhibitors are toxic in nature, so green inhibitors which are biodegradable, without any heavymetals and other toxic compounds, are promoted. Also plant products are inexpensive, renewable, and readily available. Tannins, organic amino acids, alkaloids, and organic dyes of plant origin have good corrosioninhibiting abilities. Plant extracts contain many organic compounds, having polar atoms such as O, P, S, and N.These are adsorbed on the metal surface by these polar atoms, and protective films are formed, and various adsorption isotherms are obeyed. Various types of green inhibitors and their effect on different metals are mentioned in the paper.