Green Corrosion Inhibitors Derived from Synthesis: Progress and Future Directions

Use of synthetic organic compounds has been identified as one of the most profitable, effective, and useful methods of corrosion mitigation. These compounds become functional through their adsorption using electron-rich centers such as polar functional groups and multiple bonds. These compounds are used far and wide as effective substituents for traditional toxic corrosion inhibitors; however, their synthesis and discharge are associated with various environmentalrelated problems. Compounds derived through one-step multicomponent reactions and environmentally sustainable materials such as carbohydrates and amino acids are used as environmentally sustainable corrosion inhibitors. Organic compounds synthesized using microwave and ultrasound irradiations are also considered environmentally sustainable corrosion inhibitors. Compounds synthesized using catalysts including biomolecules (e.g., chitosan, cellulose) and green solvents such as ionic liquids, supercritical CO2 , and water can also be considered environmentally friendly alternatives for traditional toxic corrosion inhibitors. This chapter aims to describe the collection of literature on various types of synthetic corrosion inhibitors. This chapter also describes why and how a particular class of compound is environmentally friendly, with suitable descriptions on the mechanism of corrosion inhibition using these compounds.