Synthesis of new benzimidazole derivatives and their corrosion inhibition performance on mild steel in 0.5 M hydrochloric acid.

摘要

The influence of three newly synthesized benzimidazole derivatives on the corrosion inhibition of mild steeludin 0.5 M HCl solution is studied using mass loss and electrochemical techniques. The corrosion rateudwas found to be depends on concentration and temperature of the medium. Adsorption of all the three inhibitors obeys Langmuir isotherm model. Polarization curves indicated that the studied inhibitors are of mixed type. Electrochemical impedance spectroscopy explains the mechanism of inhibitor’s action. Various activation and adsorption thermodynamic parameters were calculated and discussed. The results obtained from weight loss and electrochemical studies are in good agreement with each other. Theudvariation in inhibitive efficiency mainly depends on theudtype and nature of the substituents present in theudinhibitor molecule