Maryam Dehdab - Dipartment of Chemistry, Faculty of Engineering, Islamic Azad University, Alishahr Branch
Masoud Zamani - ۲Dipartment of Chemistry, Faculty of Engineering, Islamic Azad University, Alishahr Branch
Mostafa Narimani - ۳Department of Gas Engineering, Faculty of Engineering, Islamic Azad University, Omidieh Branch

Quantum chemical calculations using the density functional theory (DFT) and ab initio methods were performed on nine amino acids grouped under three skeletons used as corrosion inhibitors for mild steel to determine the relationship between molecular structure and their inhibition efficiencies.the results of the quantum chemical calculations and experimental %IE were subjected to correlation analysis and indicate that their inhibition effect are closely related to hardness, polarizability, electrophilicity. The %IE increased with increase in plarizability, electrophilicity and decrease in hardness

plarizability, electrophilicity, hardness, inhibition efficiencies(IE), density functional theory(DFT)