Emblica Officinalis (Indian Gooseberry) Leaves Extract as Corrosion Inhibitor for Mild Steel in IN HCl Medium
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Date
2010
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Abstract
Corrosion inhibition efficiency of acid extract of dry Emblica
officinalis leaves for mild steel in IN HCl medium is investigated in the
present study. Experimental methods include weight loss, potentiodynamic
polarization and impedance studies. The results indicate Emblica officinalis
leaves to be a good corrosion inhibitor of a mixed type and having efficiency
of 87.9% at 2% v/v inhibitor concentration. Corrosion inhibition may be due to
the spontaneous physical adsorption of the plant constituents on the mild steel
surface. Experimental data fitted the Langmuir, Temkin, Freundlich and Flory-
Huggins adsorption isotherms.