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CORROSION INHIBITION OF ALUMINIUM AND STEEL BY IMIDAZOLIUM SALTS

1 LANGOVÁ Šárka
Co-authors:
1 MARKOVÁ Kristýna 1 PÁNEK Petr 1 VÁŇOVÁ Petra 1 KONEČNÁ Kateřina 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:
28th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 22nd - 24th 2019
Proceedings:
Proceedings 28th International Conference on Metallurgy and Materials
Pages:
956-961
ISBN:
978-80-87294-92-5
ISSN:
2694-9296
DOI:
https://doi.org/10.37904/metal.2019.723
Published:
4th November 2019
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
571 views / 339 downloads
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Abstract

The corrosion inhibition of aluminium and steel in the hydrochloric acid solution by 1-octyl-3-methylimidazolium bromide, 1-octyl-3-methylimidazolium hydrogensulphate and 1-dodecyl-3-methylimidazolium bromide was investigated using electrochemical and weight loss methods. The qualitative surface analysis was carried out. All the imidazolium salts under investigation act as mixed type inhibitors with predominantly cathodic action on aluminium and predominantly anodic action on steel. The inhibition efficiency of 1-octyl-3-methylimidazolium hydrogensulphate was higher than 99% for aluminium but decreased with time rapidly. The surface analysis elucidated the differences between the inhibition action on the mild and stainless steel. The Gibbs energy of adsorption was calculated by means of the Langmuir isotherm.

Keywords: Imidazolium salts; corrosion inhibition; polarization curve; steel; aluminium

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