Corrosion Inhibitive Behaviour of Camellia Sinensis on Aluminium Alloy in H2SO4

Loto, C. A. and Joseph, O. O and Loto, R. T. and Popoola, A. P. I. (2014) Corrosion Inhibitive Behaviour of Camellia Sinensis on Aluminium Alloy in H2SO4. International Journal of ELECTROCHEMICAL SCIENCE, 9. pp. 1221-1231.

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Abstract

The effect of Camellia Sinensis (green tea) extract as a green inhibitor on the corrosion of aluminium alloy in 0.8M sulphuric acid was studied at room temperature. Weight loss/corrosion rate and potential measurement techniques were used for the experimental work. The results were further analysed using the two-factor ANOVA test. Potential measurement was performed using a digital voltmeter and a saturated calomel reference electrode. The tea extract was obtained from the green tea leaves. The results obtained showed effective corrosion inhibition of the extract on the aluminium alloy test specimens in the different concentrations of sulphuric acid used. The extracts gave appreciable corrosion inhibition performance of aluminium at 20 and 40% concentrations with the weight loss of 236mg (0.236g) and 265 mg (0.265g) respectively. ANOVA test confirmed the results at 95% confidence, and further showed that concentration of green tea extract had greater effect on potential and weight loss measurements. The value of Gibb’s free energy of adsorption obtained signified that the mechanism of adsorption of plant extract molecules on the metal surface was by physiosorption.

Item Type:	Article
Uncontrolled Keywords:	Corrosion inhibition, Camellia sinensis, Aluminium, ANOVA, Adsorption, Gibb’s free energy
Subjects:	T Technology > TJ Mechanical engineering and machinery
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	Mrs Patricia Nwokealisi
Date Deposited:	18 Dec 2014 10:59
Last Modified:	18 Dec 2014 10:59
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/3117

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