Chapter 15 - Organic–inorganic mixed nanocomposite as protective coating for corrosion inhibition

Abstract

In the present scenario, corrosion has become a major problem to the industries, infrastructural and other sectors. This concern has compelled the researchers to develop several corrosion-inhibiting molecules as additives and coating materials to mitigate the impending effects of corrosion on the susceptible metallic equipment used in several industrial applications. Herein, the organic molecules as corrosion protective coating have grabbed special attention due to their cost-effectiveness, easy applicability, better adsorption, and superior anticorrosive nature. The organic compounds containing hetero-atoms like N, O, S, etc. exhibit good adhesion on the metal substrates due to their good electron donation property to the targeted metal substrates. Additionally, the organic compounds containing π-bonds and aromatic moieties showed better interaction capability with the metallic surface atoms. On the other hand, inorganic compounds are used to passivate the metallic surfaces through passive film formation on the metal’s surfaces and their subsequent corrosion inhibition. The combined form of organic and inorganic compounds also exhibits synergistically enhanced anticorrosive behavior and protect the metal substrates from corrosive media. In this chapter, the most significant and recent developments or innovations in the organic–inorganic mixed nanocomposites (OINCs) as anticorrosive materials have been outlined exquisitely. Furthermore, the future perspectives of OINCs as better ingredients for corrosion inhibition have been predicted.