Eco-friendly benzimidazolium based ionic liquid as a corrosion inhibitor for aluminum alloy composite in acidic media
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Date
2017
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Elsevier B.V.
Abstract
A novel, relatively inexpensive ionic liquid, 1.3-bis[2-(4-methoxyphenyl)-2-oxoethyl]-1H–benzimidazol-3-ium bromide (MOBB), was synthesized and characterized using FTIR, NMR, LC-MS and single crystal XRD (SCXRD) techniques. MOBB was evaluated for its corrosion inhibition properties on 6061 Al-15 vol% SiC <inf>(P)</inf> composite in 0.1 M HCl and 0.1 M H<inf>2</inf>SO<inf>4</inf> media at different temperatures (30–50 °C) by electrochemical impedance spectroscopy and potentiodynamic polarization methods. The adsorption of MOBB on the composite was predominantly through chemisorption, obeying Langmuir adsorption isotherm. Inhibition efficiencies of 98.7% in HCl and 98.8% in H<inf>2</inf>SO<inf>4</inf> were obtained, MOBB acting as a mixed type of inhibitor with predominant cathodic control. © 2016
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Keywords
Corrosion, Electrochemical corrosion, Electrochemical impedance spectroscopy, Fourier transform infrared spectroscopy, Ionic liquids, Metallic matrix composites, Polarization, Silicon carbide, Single crystals, Acid inhibition, Acid solutions, Aluminum alloy composites, Corrosion inhibition, Eco-friendly, Inhibition efficiency, Langmuir adsorption isotherms, Single crystal XRD, Corrosion inhibitors
Citation
Journal of Molecular Liquids, 2017, 225, , pp. 426-438