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

Molecules

Ayman M. Atta¹  Gamal A. El-Mahdy¹  Hamad A. Al-Lohedan¹  Abdel Rahman O. Ezzat¹ 

[1] Surfactants Research Chair, Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia; E-Mails:

关键词: steel;    aggregation;    contact angle;    hydrophobic ionic liquids;    potentiodynamic test;    EIS;   

DOI  :  10.3390/molecules200611131

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.