Adsorption and performance of ammonium-based ionic liquids as corrosion inhibitors of steel
| Autor: | Raquel E. Hernández-Ramírez, Paulina Arellanes-Lozada, Octavio Olivares-Xometl, Irina Victorovna Lijanova, Jorge Roberto Vargas-García, Natalya V. Likhanova |
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| Rok vydání: | 2018 |
| Předmět: |
02 engineering and technology
010402 general chemistry Electrochemistry 01 natural sciences Chloride Corrosion Metal chemistry.chemical_compound Adsorption X-ray photoelectron spectroscopy Materials Chemistry medicine Thermal stability Physical and Theoretical Chemistry Spectroscopy Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials visual_art Ionic liquid visual_art.visual_art_medium 0210 nano-technology medicine.drug Nuclear chemistry |
| Zdroj: | Journal of Molecular Liquids. 265:151-163 |
| ISSN: | 0167-7322 |
| Popis: | Methyltrioctylammonium methyl sulfate (TMA) and trimethyltetradecylammonium methyl sulfate (TTA) were synthetized as novel quaternary-ammonium-derived ionic liquids (ILs) in order to be evaluated as corrosion inhibitors (CIs) of API-X52 steel in 1 M HCl. Electrochemical techniques were used to evaluate the anticorrosive effect, finding that TMA and TTA worked as mixed-type CIs and inhibited the corrosion process depending on the temperature, immersion time and IL concentration, being remarkably effective at 40 °C, which was attributed to the high thermal stability of the methyl sulfate anions. X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and atomic force microscopy (AFM) were used to elicit the chemical composition and surface morphology of steel in the presence of CIs whose adsorption processes involved strong electrostatic interactions between the metal, chloride ions, methyl sulfate anions and quaternary ammonium cations in the ILs. The results allowed the development of a corrosion inhibition mechanism. |
| Databáze: | OpenAIRE |
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