Inhibition of aluminum corrosion in hydrochloric acid medium by 2-(2-(4chlorobenzylidene)hydrazinyl)-3-nitroimidazo[1,2-a]pyridine: gravimetric and adsorption studies
Abstract
The purpose of this study is to evaluate the corrosion-inhibiting efficacy of the 2-(2-(4-chlorobenzylidene)hydrazinyl)-3-nitroimidazo[1,2-α] pyridine, or 4Cl-BNH-NIP, on aluminum corrosion in a 1 M hydrochloric acid medium using the gravimetric method. The corrosion inhibition efficiency increases with inhibitor concentration but decreases with increasing temperature. Adsorption isotherm models (Langmuir, El-Awady, Freundlich, Flory-Huggins, Frunkin, and Temkin) were used to describe the interactions between the molecule and metallic aluminum. The Dubinin-Radushkevich and Adejo-Ekwenchi isotherms were used to identify the adsorption modes. The thermodynamic parameters of adsorption and activation were also determined and analyzed in this study.
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