Abstract

SAID, Mohamed Elhadi et al. Experimental Evaluation and Theoretical Study of Imidazolium and Benzimidazolium. Derivatives as Corrosion Inhibitors of Mild Steel in a 0.5 M H₂SO₄ Solution. Port. Electrochim. Acta [online]. 2023, vol.41, n.2, pp.81-101.  Epub Apr 30, 2023. ISSN 0872-1904.  https://doi.org/10.4152/pea.2023410201.

(dimOHmIm)+,I- and (dimOHmBim)+,I- were investigated as a corrosion inhibitors for MS in 0.5 M H2SO4 using gravimetric, PDP and EIS techniques. Polarization curves revealed that both compounds acted as mixed-type inhibitors, and that corrosion IE% increased with their higher concentrations. The adsorption of both inhibitors onto the MS surface obeyed Langmuir’s isotherm. The compound II showed a higher corrosion IE% than that of I. The quantum chemical calculations were applied to investigate the relationship between the two azolium salts derivatives electronic properties and their corrosion IE%.

Keywords : imidazolium and benzimidazolium salts; MS; polarization; EIS; WL and corrosion inhibition.

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