Homa Shafiee - Payam Noor University, Department of Chemistry, Tehran, Iran
Fatemeh Mostaghni - Payam Noor University, Department of Chemistry, Tehran, Iran
Kolsoum Ejraei - Islamic Azad University Lamerd Branch, Lamerd, Iran

The potentiodynamic polarization curves, quantum chemical calculation and molecular dynamics simulation methods are used to study the inhibition effects of Salen ligand regarding the corrosion of carbon steel (A۱۰۵) in salty and acidic solutions of ۳.۵% NaCl and ۱.۰ M HCl respectively. The results show that the values of inhibition efficiency in ۳.۵% NaCl and ۱.۰ M HCl solutions are higher than ۹۶% and ۹۵% respectively at ۲۵ oC. For both solutions, the adsorption of the inhibitor on steel surface corresponds the Langmuir adsorption isotherm, and the nature of adsorption is mainly chemical. All the results show that Salen is a good corrosion inhibitor for protection of steel in both Salty and acidic medium.

Acid corrosion, Electrochemical techniques, Density functional theory, Simulation analysis