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Eco-Friendly Impact of Vernonia amygdalina as Corrosion Inhibitor on Aluminium in Acidic Media

Ajanaku , K. O. and Ajanaku , C. O. and Akinsiku, A.A. and Falomo, A. and Edobor-Osoh, A. and John, M. O. (2012) Eco-Friendly Impact of Vernonia amygdalina as Corrosion Inhibitor on Aluminium in Acidic Media. Chemistry Journal, 2 (4). pp. 153-157. ISSN 2049-954X

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Abstract

Corrosion inhibition effect of Vernonia amygdalina extract on aluminium in 0.5 M HCl solution was studied using gravimetric method at 40 oC temperature. Aluminium coupons of dimension 3x1.5 cm were immersed in test solutions of uninhibited acid and those containing extract concentrations of 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 and 1.0 g/L concentration at intervals of 30 minutes progressively for 150 minutes. The results revealed that V. amygdalina could be used as an ecofriendly corrosion inhibitor for aluminium in HCl solution. The corrosion inhibition efficiency of the extract increases with concentrations in the corrosion media. The surface coverage of the extract obeyed Langmuir adsorption isotherm. Hence,the corrosion inhibition effect of the extract was rationalized via adsorption mechanism.

Item Type: Article
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Engineering, Science and Mathematics > School of Chemistry
Depositing User: Mrs Abiola Edobor-Osoh
Date Deposited: 09 Apr 2015 11:20
Last Modified: 09 Jan 2017 12:23
URI: http://eprints.covenantuniversity.edu.ng/id/eprint/4704

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