Abstract
Recently employment of the traditional organic and inorganic compounds as corrosion inhibitors is highly restricted due to their toxicity and adverse impact on the living organisms. In view of this, various environmental friendly alternatives of synthetic and biological origin are developed and currently being used. Compounds synthesized using one step multicomponent reactions with and without microwave and ultrasound heatings, solid supported synthesis/reactions, solid phase synthesis/reactions, and mechanochemical mixing are used as most effective and economic, environmental friendly alternatives to traditional toxic corrosion inhibitors. Organic compounds synthesized in organic solvents including ionic liquids, water, and supercritical CO2 can also be considered as green alternatives. Ionic liquids and polyethylene glycol are well-established green alternatives for different industrial applications including as corrosion inhibitors. Among the natural environmental friendly alternatives, plant extracts, natural polymers, carbohydrates, amino acids, etc., are well-known. Chemical derivatives of these compounds can also be regarded as environmental friendly substitutes. The present chapter deals with the salient features of various types of synthetic and natural corrosion inhibitors and their properties.
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