期刊
JOURNAL OF MOLECULAR LIQUIDS
卷 229, 期 -, 页码 396-404出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molliq.2016.12.092
关键词
Corrosion inhibitor; Carbon steel; Ionic liquids; Electrochemistry
In the present paper, four ionic liquids namely:3-Decy1-1-methy1-1H-imidazol-3-ium tetrafluoroborate (IL1), 3Dodecyl-l-methyl-IH-imidazol-3-ium tetrafluoroborate (IL2), 3-Decy1-1,2-dimethy1-1H-imidazol-3-ium tetrafluoroborate (113) and 3-Dodecyl-1,2-dimethyl-IH-imidazol-3-ium tetrafluoroborate (IL4), were synthesized, characterized and tested as corrosion inhibitors for carbon steel in 1.0 M HC1 solution. The molecular structure and characterizations of these ionic liquids were confirmed by elemental analysis, FTIR, X -Ray Diffraction (XRD), therm gravimetric analysis (TGA) and H-1 NMR spectroscopy. The corrosion performance of the ionic liquids was evaluated by using polarization and electrochemical impedance spectroscopy (EIS) measurements. The compounds presented relatively good inhibition efficiencies at 200 ppm. The order of the inhibition efficiency is as follows: IL4 > 11.3 > IL2 > ILl. The adsorption of the studied ionic liquids obeyed the Temkin adsorption isotherm. (C)2016 Elsevier B.V. All rights reserved.
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