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Molecules 2015, 20(6), 11131-11153; doi:10.3390/molecules200611131

A New Green Ionic Liquid-Based Corrosion Inhibitor for Steel in Acidic Environments

Surfactants Research Chair, Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
Petroleum Application Department, Egyptian Petroleum Research Institute, Cairo 11727, Egypt
Department of Chemistry, Faculty of Science, Helwan University, Helwan 11795, Egypt
Author to whom correspondence should be addressed.
Academic Editor: Jean Jacques Vanden Eynde
Received: 16 April 2015 / Revised: 22 May 2015 / Accepted: 9 June 2015 / Published: 17 June 2015
(This article belongs to the Section Molecular Diversity)
View Full-Text   |   Download PDF [1988 KB, uploaded 17 June 2015]   |  


This work examines the use of new hydrophobic ionic liquid derivatives, namely octadecylammonium tosylate (ODA-TS) and oleylammonium tosylate (OA-TS) for corrosion protection of steel in 1 M hydrochloric acid solution. Their chemical structures were determined from NMR analyses. The surface activity characteristics of the prepared ODA-TS and OA-TS were evaluated from conductance, surface tension and contact angle measurements. The data indicate the presence of a double bond in the chemical structure of OA-TS modified its surface activity parameters. Potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) measurements, scanning electron microscope (SEM), Energy dispersive X-rays (EDX) analysis and contact angle measurements were utilized to investigate the corrosion protection performance of ODA-TS and OA-TS on steel in acidic solution. The OA-TS and ODA-TS compounds showed good protection performance in acidic chloride solution due to formation of an inhibitive film on the steel surface. View Full-Text
Keywords: steel; aggregation; contact angle; hydrophobic ionic liquids; potentiodynamic test; EIS steel; aggregation; contact angle; hydrophobic ionic liquids; potentiodynamic test; EIS

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Atta, A.M.; El-Mahdy, G.A.; Al-Lohedan, H.A.; Ezzat, A.R.O. A New Green Ionic Liquid-Based Corrosion Inhibitor for Steel in Acidic Environments. Molecules 2015, 20, 11131-11153.

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