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Journal of Applied Sciences and Environmental Management
World Bank assisted National Agricultural Research Project (NARP) - University of Port Harcourt
ISSN: 1119-8362
Vol. 18, No. 2, 2014, pp. 319-325
Bioline Code: ja14044
Full paper language: English
Document type: Research Article
Document available free of charge

Journal of Applied Sciences and Environmental Management, Vol. 18, No. 2, 2014, pp. 319-325

 en Inhibition and Adsorption impact of Leave Extracts of Cnidoscolus Aconitifolius check for this species in other resources on Corrosion of Aluminium Sheet in 1 M Hcl Medium
UGI, BENEDICT U.; UWAH, IKAMA E. & UKPE, NNANA U.

Abstract

Corrosion inhibition in the presence of alokaloid and non alkaloid extracts of Cnidoscolus aconitifolius check for this species in other resources in 1M HCl was studied using the weight loss and hydrogen evolution techniques at 303, 313 and 333 K. The results obtained revealed that the inhibition efficiency decreased with increase in temperature. Inhibition occurred through adsorption of the alokaloid and non alkaloid extracts molecules on the metal surface. The apparent activation energies, enthalpies and entropies of the dissolution process and the free energies and enthalpies for the adsorption process were determined and discussed. The fundamental thermodynamic functions were used to evaluate important inhibitive properties of Cnidoscolus aconitifolius.

Keywords
Activation energy; Gibb's Free Energy; Langmuir adsorption; Cnidoscolus aconitifolius; Aluminium sheet

 
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