Author/Authors :
Shabani-Nooshabadi، Mehdi نويسنده Department of Analytical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, I.R. Iran Shabani-Nooshabadi, Mehdi , Hoseiny، Fatemeh Sadat نويسنده Department of Analytical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, I.R. Iran Hoseiny, Fatemeh Sadat , Jafari ، Yaser نويسنده M.A. Student, English Language and Literature Post-graduate Department, Borujerd Branch, Islamic Azad University ,
Abstract :
The corrosion inhibition effect of Ephedra Sarcocarpa (ES) extract on copper (Cu)
in 2.0 M HCl medium has been investigated by potentiodynamic polarization and
electrochemical impedance spectroscopy (EIS) methods. The polarization studies showed that
ES extract acts as cathodic type protection and maximum inhibition efficiency 95% in 2.0 M
HCl is obtained at 0.5 g/L ES extract at 298 K. EIS was used to investigate the mechanism of
corrosion inhibition. The Nyquist plots show an increase of the charge transfer resistance
with increasing of the inhibitor concentration and decreases double layer capacitance. The
inhibitory action of the extract was discussed in view of the Langmuir adsorption isotherm
