Role of 2-Chlorobenzimidazole to Control Corrosion of Mild Steel in 1M Sulfuric Acid Solution

Corrosion control of mild steel has been investigated by newly synthesized 2-Chlorobenzimidazole as an inhibitor with different concentrations, 10 ppm – 500 ppm in 1M sulfuric acid solution. Various techniques such as Weight Loss, Open Circuit Potential and Potentiodynamic Polarization have been used to study the mechanism and kinetics of corrosion and its mitigation. The inhibition begins just from 10 ppm solution and optimized at 300 ppm solution by about 49%; but thereafter, at further higher concentrations, the rate of corrosion inhibition decreases. The surface analysis performed by Scanning Electron Microscope. The adsorption obeys the Langmuir’s adsorption isotherm phenomenon of a straight-line graph with slope nearly one. From the polarization of both the electrodes it is revealed that the inhibitor is of a mixed type.