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

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Thu, 2015-09-17 11:28 — Ismail Warad
Journal Title, Volume, Page: 
International journal of electrochemical science 11(3):8403 - 8411 · August 2015
Year of Publication: 
2015
Authors: 
Rachid Salghi
Laboratory of Environmental Engineering and Biotechnology, ENSA, Université Ibn Zohr, PO Box 1136, 80000 Agadir, Morocco
D. Ben Hmamou
Départment de Biologie, Faculté des sciences et de la technologie, Université Dr. Tahar Moulay – Saïda- Algerie
Benali Omar
Départment de Biologie, Faculté des sciences et de la technologie, Université Dr. Tahar Moulay – Saïda- Algerie
Shehdeh Jodeh
Department of Chemistry, Faculty of Science, An-Najah National University, P.O. Box 7, Nablus, Palestine
Ismail Warad
Department of Chemistry, Faculty of Science, An-Najah National University, P.O. Box 7, Nablus, Palestine
Current Affiliation: 
Department of Chemistry, Faculty of Science, An-Najah National University, P.O. Box 7, Nablus, Palestine
Eno. E. Ebenso
Material Science Innovation & Modelling (MaSIM) Focus Area, Faculty of Agriculture, Science and Technology, North-West University (Mafikeng Campus), Private Bag X2046, Mmabatho 2735, South Africa
A. Oukacha
Laboratoire de Biotechnologie Végétale, Département de Biologie, faculté des Sciences, Université Ibn Zohr, B.P 8106- Agadir
S. Tahrouch
Laboratoire de Biotechnologie Végétale, Département de Biologie, faculté des Sciences, Université Ibn Zohr, B.P 8106- Agadir
B. Hammouti
LCAE-URAC 18, Faculty of Science, University of Mohammed Premier, Po Box 717 60000 Oujda, Morocco
Preferred Abstract (Original): 

The corrosion inhibition of Pistachio Essential Oils (PEO) on carbon steel in 0.5 M H2SO4 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 H2SO4 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 double-layer capacitance (Cdl) 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.

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