Aqueous extracts of olive roots, stems, and leaves as eco-friendly corrosion inhibitor for steel in 1 MHCl medium

International Journal of Industrial Chemistry

دوره 6، شماره 4، بهمن 2015، صفحه 233-245

نوع مقاله: research article

شناسه دیجیتال (DOI): https://doi.org/10.1007/s40090-015-0042-z

نویسندگان

Driss Bouknana^{* 1، 2}؛ Belkheir Hammouti¹؛ Hana Serghini caid³؛ Shehdeh Jodeh⁴؛ Abdelhamid Bouyanzer¹؛ Abdelouahad Aouniti¹؛ Ismail Warad⁴

¹LCAE-URAC18, Faculty of Science, University Mohammed Premier, BP 4808, 60046, Oujda, Morocco

²COSTE, Faculty of Science, University Mohammed Premier, BP 4808, 60046, Oujda, Morocco

³Biology of Plants and Microorganisms, Faculty of Science, University Mohammed Premier, BP 4808, 60046, Oujda, Morocco

⁴Department of Chemistry, An-Najah National University, P. O. Box 7, Nablus, State of Palestine

چکیده

This work is devoted to examine the effectiveness of the aqueous extracts of olive (Olea europaea L.) leaves, roots, and stems on corrosion of mild steel in 1 M HCl solution using the weight loss measurement at various temperature and concentration effects. Polarization curves and electrochemical impedance spectroscopy (EIS) methods were employed to evaluate corrosion rate and inhibition efficiency. Corrosion inhibition efficiencies of 89.24, 88.84, and 89.83 % were achieved in 1 M HCl for olive root extract (ORE), olive stem extract (OSE), and olive leaf extract (OLE), respectively. It was found that the different extracts act as a good corrosion inhibitor for the tested system. The inhibitive action of the extract is discussed with a view to the adsorption of its components onto the steel surface which made a barrier to mass and charge transfer. The adsorption of extract components onto the steel surface was found to be a spontaneous process and increases the activation energy of the corrosion process. The inhibition efficiency is greatly reduced as the temperature increased. Experimental results show that corrosion inhibition efficiency increases with concentration of the sample extract. Polarization studies show that olive leaf, root, and stem extracts act as a mixed inhibitor.

کلیدواژه‌ها

Olive root؛ Stems؛ Leaves؛ Corrosion؛ Inhibitor؛ Steel؛ Hydrochloric acid