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A comparative analysis on the effects of sodium nitrate and hexamine on the corrosion of aluminium alloy in an acidic environment

Joseph, O. O and Dirisu, J. O. and Aluko, Olalekan Michael and Loto, R. T. and Urias, T.B. (2024) A comparative analysis on the effects of sodium nitrate and hexamine on the corrosion of aluminium alloy in an acidic environment. In: Materialstoday: Proceedings, 2024, Online.

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Abstract

Despite aluminium and its alloys being relatively resistant to corrosion reaction as a result of their passivating tendencies, aluminium alloys usually succumb to acidic attacks resulting in mostly pitting corrosion. This study is focused on comparing the efficiency of sodium nitrate with that of hexamine on the acid corrosion of aluminium when used individually as inhibitors in 1 M Hydrochloric acid. The gravimetric method was used for the corrosion study. Sodium nitrate was found to have higher inhibitor efficiency of 94% compared to that of hexamine (44%), positioning the former as a better inhibitor for aluminium alloy in 1 M HCl. ΔGadso was evaluated and the obtained Standard free energy of adsorption were in the range of −13 to −17 kJ/mol for NaNO3 and −6 to −12 kJ/mol for hexamine, signifying the physisorption mode of adsorption

Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TP Chemical technology
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Patricia Nwokealisi
Date Deposited: 16 Jan 2025 15:48
Last Modified: 16 Jan 2025 15:48
URI: http://eprints.covenantuniversity.edu.ng/id/eprint/18702

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