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

Aqueous extracts of olive roots, stems, and leaves as eco-friendly corrosion inhibitor for steel... 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Industrial Chemistry Springer Journals

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

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Publisher
Springer Journals
Copyright
Copyright © 2015 by The Author(s)
Subject
Chemistry; Industrial Chemistry/Chemical Engineering; Polymer Sciences; Nanochemistry; Environmental Chemistry
ISSN
2228-5970
eISSN
2228-5547
DOI
10.1007/s40090-015-0042-z
Publisher site
See Article on Publisher Site

Abstract

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.

Journal

International Journal of Industrial ChemistrySpringer Journals

Published: Jun 30, 2015

References