International Journal of Multidisciplinary Research and Development

International Journal of Multidisciplinary Research and Development






ISSN Online: 2349-4182
ISSN Print: 2349-5979


International Journal of Multidisciplinary Research and Development
International Journal of Multidisciplinary Research and Development
Vol. 2, Issue 4 (2015)

Inhibitive effect of Cnidoscolus chayamansa leaves extract on Copper in Acid environment


Bright A, Michlin Ruphina Maragatham. S, Malar vizhi.I, Selvaraj. S

The inhibition efficiency of Cnidoscolus Chayamansa leaves extract on the corrosion of Copper in 1.0N Hydrochloric acid environment in various concentration with temperature and period of contact has been investigated by mass loss measurement. The observed results indicate that the inhibition efficiency increased with increase of inhibitor concentration but decreased with rise in temperature and time. The inhibitor obeys Langmuir and Temkin adsorption isotherms. Thermodynamic parameters (Viz: Ea, Qads, ∆Gads, ∆H and ∆S) indicates that the adsorption of the inhibitor is physisorption, exothermic and spontaneous. Corrosion product on the metal surface in the presence and absence of inhibitor is characterised by UV, FT-IR, XRD and EDX-SEM spectral techniques.
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