Study of the Corrosion Inhibition Effect of Pistachio Essential Oils in 0.5 M H2SO4

Journal Title, Volume, Page:

Int. J. Electrochem. Sci., 10 (2015) 8403 - 8411

Year of Publication:

2015

Authors:

R. Salghi , D. Ben Hmamou , O. Benali S. Jodeh , I. Warad ,O. Hamed S. Tahrouch , B. Hammouti , Eno. E. Ebenso , A. Oukacha

Preferred Abstract (Original):

The corrosion inhibition of Pistachio Essential Oils (PEO) on carbon steel in 0.5 M H

was

investigated by weight loss, potentiodynamic polarization and electrochemical impedance

spectroscopy (EIS). Results showed that PEO inhibited carbon steel corrosion in a 0.5 M H

solution and indicated that the inhibition efficiencies increased with the concentration of inhibitor.

Potentiodynamic polarization studies suggested that this inhibitor is a mixed type inhibitor with

predominance anodic type. Nyquist plots indicated that the addition of inhibitor decreases the doublelayer

capacitance

) of the corrosion process depressed semicircles with their centre below real axis.

The PEO adsorption on the carbon steel surface followed the Langmuir adsorption isotherm.

An-Najah Staff