Evaluation of Anticorrosion Properties of 1, 2 ,4-triazole Derivatives on Steel in Acidic Media using Quantum Chemical Calculation and Molecular Dynamic Simulation Methods

Abstract

Molecular modelling approach has been used for the pr diction of anticorrosion properties of 1, 2, 4-triazole derivatives on steel in acidic medium by the quantum chemical calculation and molecular dynamics (MD) si mulation methods. Quantum chemical parameters such as the highest occupied mo lecular orbital (E-HOMO), the energy of the lowest unoccupied molecular orbital ( E-LUMO), energy band gap ( ΔE), dipole moment, global electronic chemical potential (μ), chemical softness ( σ), chemical hardness ( η) and electrophilicity ( ) have been calculated and discussed. The reactive sites of the inhibitor molecules were found to be o n the nitrogen-atom of the Triazolic ring and on the π-electron centers. Furthermore, molecular dynamics s mulation was applied to search for the best inhibitor adsorption c figuration over Fe (110) surface. The best adsorption energy was found to be -430.27 kcal/mol (inhibitor 3). The adsorptions occurred via chemisorption.