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Corrosion Inhibitive Effects of Withania Somnifera (A medicinal plant) on Aluminium in HCl Solution

Author Affiliations

  • 1 Department of Chemistry, Government College, Ajmer, Raj., INDIA

Res. J. Recent Sci., Volume 1, Issue (ISC-2011), Pages 73-78,(2012)

Abstract

Corrosion can be considered either chemical or electrochemical in nature. It decays the metallic properties of metals and lead them unfit for their specific purpose in industry. Corrosion of metals may be prevented by either barrier protection or sacrificial protection or by alloying or by anti rust solution of ligands containing N, S, O, Se and P as hetero atoms. The naturally occurring plant products are eco-friendly, compatible, nonpolluting, less toxic, easily available, biodegradable and economic to be used as corrosion inhibitors. Extract of different parts of plant like seeds, leaves, stem can be used as inhibitor to reduce the corrosion rate of metal like aluminium in acidic media.Corrosion inhibitive effects of naturally occurring Withania Somnifera (Ashwagandha ) have been studied in different concentrations of HCl for aluminium. Studies were carried out at two different temperatures of extract of leaves and root of the said plant. Leaves extract has been found more effective corrosion inhibitor at lower temperature. The maximum corrosion inhibition efficiency was found 99.28% for leaves extract at 303K.

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