Thermodynamic Behaviour of Mild Steel Corrosion in an Environment of Bilberry Cactus Plant Extracts in Hydrochloric Acid Solution.

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dc.contributor.authorAbdulrahman, A. S.
dc.contributor.authorIbrahim, H. Kobe
dc.contributor.authorAigbondion, V. S.,
dc.contributor.authorKareem, A. Ganiyu
dc.contributor.authorAwe, I. Caroline
dc.date.accessioned2021-10-12T10:43:10Z
dc.date.available2021-10-12T10:43:10Z
dc.date.issued2014-09-09
dc.description.abstractThe inhibitive action of bilberry cactus plant extracts (BCPE) on mild steel in 1.5 M Hydrochloric acid with addition of different concentrations (0.1-0.5 g/l) was investigated using weight loss and hydrogen evolution measurement methods. The inhibitor organic structures were characterized for their functional groups using Gas Chromatography Mass Spectrometer (GCMS) and Fourier Transformation InfraRed (FTIR) analyses. The results revealed that the protective film formed on the surface of mild steel by the adsorption of extracts in 1.5 M HCL solution obeyed Langmuir adsorption isotherm. It was observed from thermodynamic adsorption parameters (ΔHads, ΔSads and ΔGads) that the inhibitor adsorbed via physical adsorption and the negative values obtained indicated exothermic reaction and spontaneous process. Finally, the effect of substituents type in inhibition efficiency was investigated using Linear Free Energy Relationship (Hammett relationship) and the reaction of adsorption favoured by electron donation of the extract substituent groups.en_US
dc.description.sponsorshipEngr. Ibrahim Hassan Kobeen_US
dc.identifier.citationAbdulrahman, A. S., Ibrahim, H. K., Aigbondion, V. S., Kareem, A. G. and Awe, I. C. (2014). Thermodynamic Behaviour of Mild Steel Corrosion in an Environment of Bilberry Cactus Plant Extracts in Hydrochloric Acid Solution. Journal of Metallurgy and Materials Engineering. 9; 1-14.en_US
dc.identifier.issn2009-1919
dc.identifier.urihttps://uilspace.unilorin.edu.ng/handle/20.500.12484/6569
dc.language.isoenen_US
dc.publisherJournal of Metallurgy and Materials Engineering. Published by Nigerian Metallurgical Society, Abuja Nigeria.en_US
dc.relation.ispartofseries9;1-14
dc.subjectBilberry cactusen_US
dc.subjectMild steelen_US
dc.subjectInhibitoren_US
dc.subjectHammett relationshipen_US
dc.titleThermodynamic Behaviour of Mild Steel Corrosion in an Environment of Bilberry Cactus Plant Extracts in Hydrochloric Acid Solution.en_US
dc.typeArticleen_US

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The inhibition efficiency of the studied green inhibitor increased with increase in the concentration and decrease with increase in temperature. The exoerimental data obtained showed there was a good agreement between the results obtained in both measurement.The apparent activation energy in inhibited system is more than the values in an uninhibited system. Thermodynamic adsorption parameters (ΔHads, ΔSads and ΔGads) that the inhibitor adsorbed via physical adsorption and the negative values obtained indicated exothermic reaction
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