ALKYLIMIDAZOLIUM BROMIDES AS CORROSION INHIBITORS FOR MILD STEEL IN ACIDIC MEDIUM

1 LANGOVÁ Šárka
Co-authors:
1 PÁNEK Petr 1 FOJTÁŠKOVÁ Jana 1 VICHERKOVÁ Šárka
Institution:
1 VŠB – Technical University of Ostrava, 17. listopadu 15/2172, Ostrava 708 33, Czech Republic, EU, sarka.langova@vsb.cz
Conference:
26th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 24th - 26th 2017
Proceedings:
Proceedings 26th International Conference on Metallurgy and Materials
Pages:
1171-1176
ISBN:
978-80-87294-79-6
ISSN:
2694-9296
Published:
9th January 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
12 views / 1 download
Abstract

Inhibition of mild steel corrosion in 1 M HCl solution by alkylimidazolium bromides was investigated using electrochemical and weight loss methods. The studied ionic liquids showed appreciable inhibition efficiencies. Polarization measurements proved that the studied ILs are mixed-type inhibitors with predominantly anodic inhibition. The inhibition efficiency increased with the ionic liquid concentration and with the length of the alkyl chain. The values obtained from the polarization curves and Nyquist plots are in good agreement. The highest inhibition efficiency reached for the 1-octyl-3-methylimidazolium bromide was 93%. The Gibbs energy of adsorption was calculated by means of the Flory-Huggins isotherm and El Awady Thermodynamic-kinetic model.

Keywords: Alkylimidazolium bromides, corrosion inhibition, polarization curve, electrochemical impedance spectroscopy, hydrochloric acid
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