Corrosion Inhibition of Copper Metal by Prosopis Cineraria Leaves as Green Corrosion Inhibitor in Acidic Medium
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2017, Vol 5, Issue 6
Abstract
Ethanolic extract of Prosopis cineraria leaves(EEPcL) behaves as a green corrosion inhibitor to replace toxic chemicals. The corrosion inhibition of copper in 0.5 N HCl by Prosopis cineraria leaves has been studied by mass loss method and electrochemical techniques (potentiodynamic polarization and electrochemical impedance spectroscopy). The inhibition efficiency was found around 85.85 % with 1.064 g/L of inhibitor concentration at 48 hours of immersion period. The inhibition efficiency is found to increase with increasing concentration of extract. Electrochemical and EIS measurements shows that the presence of EEPcL has caused the adsorption of inhibitor on the metal surface. The adsorption behavior of the inhibitor follow Langmuir adsorption model where the value of free energy of adsorption, −Δ ,ܩis less than 40 kJ/mol indicates that it is a physical adsorption.
Authors and Affiliations
Prassan Singh Pratihar, Jitendra kumar Rawat
Keywords
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