Vol. 11, Issue 1 (2023)
Experimental and theoretical studies of the corrosion inhibition properties of 2-(4-chlorobenzylthio)-3-nitroH-imidazo [1, 2-α] pyridine (AE25) on aluminum in 1 M hydrochloric acid medium
Author(s): Aphouet A Koffi, Ehouman Ahissan Donatien, Evrard Ablo, Dje N’guessan Joel, PM Niamien, Siomenan Coulibali and A Trokourey
Abstract: Corrosion inhibition of aluminum in hydrochloric acid solution 1M by 2-(4-chlorobenzylthio)-3-nitroH-imidazo [1, 2-a] pyridine was investigated with gravimetric method and density functional theory (DFT). The experimental results revealed that 2-(4-chlorobenzylthio)-3-nitroH-imidazo [1, 2-a] pyridine (AE25) has a maximum inhibition effectiveness of 99.9%. The drop in corrosion rate increases with raising concentration of AE25. Studies were also performed with varying temperatures. Thermodynamic parameters calculated suggest a mixed adsorption mechanism (physisorption and chemisorption) of AE25 and its inhibitive action follows the modified Langmuir model (R2 > 0.9995). Moreover, the standard free energy of adsorption process (〖∆G〗_ads^°) is negative, thus describing a spontaneous adsorption process. Also, positive values of standard enthalpy (〖∆H〗_ads^°) indicate that adsorption process follows an endothermic process which could be due to chemisorption. Quantum chemical calculations supported physical and chemical adsorption of AE25 species on the substrate.
Pages: 55-62 | 426 Views 79 Downloads
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How to cite this article:
Aphouet A Koffi, Ehouman Ahissan Donatien, Evrard Ablo, Dje N’guessan Joel, PM Niamien, Siomenan Coulibali, A Trokourey. Experimental and theoretical studies of the corrosion inhibition properties of 2-(4-chlorobenzylthio)-3-nitroH-imidazo [1, 2-α] pyridine (AE25) on aluminum in 1 M hydrochloric acid medium. Int J Chem Stud 2023;11(1):55-62.
