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African Journal of Pure and Applied Chemistry Vol.
2 (6), pp. 046-054, June, 2008
ISSN 1996-0840
© 2008 Academic Journals
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Full Length
Research Paper
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Adsorption and inhibitive
properties of ethanol extracts of Musa sapientum
peels as a green corrosion inhibitor for mild steel in H2SO4
Eddy, N. O1 and Ebenso, E. E
2*
1Department
of Chemistry, Ahmadu Bello University, Zaria, Kaduna State
Nigeria.
2Department
of Chemistry and Chemical Technology, National University of
Lesotho, P. O. Roma 180, Lesotho, Southern Africa.
*Corresponding author. E-mail:
eno_ebenso@yahoo.com;
ee.ebenso@nul.ls
Accepted
24 June, 2008 |
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Abstract |
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The inhibition of the corrosion of mild steel by ethanol
extract of Musa sapientum peels in H2SO4
has been studied using gasometric and thermometric methods. The results
of the study reveals that the different concentrations of ethanol
extract of M. sapientum peels inhibit mild steel corrosion.
Inhibition efficiency of the extract is found to vary with
concentration, temperature, period of immersion and pH. Values of
activation energy of the inhibited corrosion reaction of mild steel are
greater than the value obtained for the blank. Thermodynamic
consideration reveals that adsorption of M. sapientum peels
extract on mild steel surface is spontaneous and occurred according to
Langmuir and Frumkin adsorption isotherms. Physical adsorption mechanism
has also been proposed for the adsorption of the inhibitor.
Key words:
Corrosion inhibition, mild steel, Inhibition, adsorption, Musa
sapientum, peels. |
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