Corrosion Inhibitors • Historically, inhibitors manifest a great acceptance as the only way to fight against corrosion problem in the industries owing to its superior anti corrosive properties. • Corrosion Inhibitors can be categorized with respect to their chemical nature as organic or inorganic and the mechanism of action as anodic, cathodic or mixed. • Anodic inhibitors play its role by forming an oxide film on the metal surface resulting in a large anodic shift of the corrosion potential. • This shift force the metallic surface into region of passivation and hence they are referred to as passivator, whereas cathodic inhibitors slow down the cathodic reactions to limit the diffusion of reducing ions to the surface of the metals. • On the other hand, mixed inhibitors work by reducing both anodic and cathodic reactions