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- Title
Corrosion Inhibition of Aluminium Alloy in Acidic Medium by Euphorbia hirta and Dialum guineense Extracts.
- Authors
Anozie, I. U.; Akoma, C. S.; Nnanna, L. A.
- Abstract
The inhibitive effect of leaf extracts of Euphorbia hirta and Dialum guineense on aluminium alloy (AA8011) in 0.5M HCl solution was studied using gravimetric technique at 30° and 60°C. The results indicate that both extracts functioned as good inhibitors and inhibition efficiency improved with concentration. The leaf extracts inhibited corrosion process in the medium by virtue of adsorption. Inhibition mechanisms were deduced from the temperature dependence of the inhibition efficiency as well as from activation parameters that govern the process. Adsorption of both leaf extracts on the aluminium alloy was found to obey the Langmuir adsorption isotherm. The phenomenon of physical adsorption is proposed from the obtained thermodynamic parameters.
- Subjects
ALUMINUM; ALLOYS; EUPHORBIA; ADSORPTION (Chemistry); THERMODYNAMICS
- Publication
International Journal of Pure & Applied Sciences & Technology, 2011, Vol 6, Issue 2, p79
- ISSN
2229-6107
- Publication type
Article