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Degradation Behaviour of Aluminium in 2M HCl/HNO3 in the Presence of Arachis hypogeae Natural Oil

Popoola, A. P. I. and Fayomi, O. S. I and Abdulwahab, M (2012) Degradation Behaviour of Aluminium in 2M HCl/HNO3 in the Presence of Arachis hypogeae Natural Oil. International Journal of ELECTROCHEMICAL SCIENCE, 7. 5817 - 5827.

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Abstract

Studies have been made on the corrosion inhibition of aluminium alloy in 2M HCl and HNO3/Arachis hypogeae natural oil using gravimetric and potentiodynamic polarization techniques at 25oC. The results revealed that Arachis hypogeae oil in 2M HCl and HNO3-aluminium environment decreased the corrosion rate at various concentrations considered. Higher inhibitor efficiency (IE) of 83.48, 96.24 and 95.57% using potentiodynamic polarization methods were demonstrated in HCl solution at 20, 50 and 100%v/v Arachis hypogeae. While an IE of 99.03, 99.94 and 88.55% were recorded at 20, 50 and 100%v/v Arachis hypogeae respectively. The IE using the gravimetric method for both aluminium-HCl/HNO3-Arachis 20, 50 and 100%v/v Arachis hypogeae was significantly enhanced. The scanning electron microscope (SEM) surface morphology of as-corroded uninhibited condition showed severe damage and pits formation than as-corroded inhibited conditions. The additions of Arachis hypogeae as corrosion inhibitor indicate a high potential value, IE and polarization resistance with decreased in current density. The methods for the corrosion assessment of the aluminium were in agreement and a mixed-type corrosion exist which obeyed Langmuir adsorption isotherms

Item Type: Article
Uncontrolled Keywords: Aluminium, Arachis hypogeae, interface, surface morphology, SEM-EDS
Subjects: T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Mrs Hannah Akinwumi
Date Deposited: 28 Sep 2017 14:41
Last Modified: 28 Sep 2017 14:41
URI: http://eprints.covenantuniversity.edu.ng/id/eprint/9445

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