Ionic liquid as a potent and ecological benign corrosion constraint for aluminum in acidic medium

2023/11/10 by Nkuzinna, O. C., Onukwuili, O. D., Nwanonenyi, S. C. +2

paper · doi:10.48317/imist.prsm/morjchem-v12i1.43862

Abstract

The inhibitive efficacy of synthesised 1-butyl-2-3-dimethylimidazolium chloride for aluminium in a 1.0 M HCl environment was investigated by weight loss, electrochemical techniques, and quantum chemical calculations at different inhibitor concentrations, times of immersion, and temperatures. Inhibition efficiency improved with increasing inhibitor concentration and period of immersion, but declined with increasing temperature. The inhibitor followed Langmuir's adsorption isotherm. The findings also suggested a physical adsorption mechanism. The potentiodynamic polarization curve suggests that the ionic liquid operated as a mixed-type inhibitor. The quantum chemical calculation results correlate perfectly, demonstrating that the investigated ionic liquid is an excellent corrosion inhibitor. Keywords:  Ionic liquid, Corrosion inhibition, Aluminum, Weight loss, EIS, DFT

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