The effect of ionic liquids with imidazolium and pyridinium cations on the corrosion inhibition of mild steel in acidic environment
2010; Elsevier BV; Volume: 52; Issue: 6 Linguagem: Inglês
10.1016/j.corsci.2010.02.030
ISSN1879-0496
AutoresNatalya V. Likhanova, M.A. Domínguez-Aguilar, Octavio Olivares‐Xometl, Noel Nava-Entzana, Elsa M. Arce, H. Dorantes,
Tópico(s)Ionic liquids properties and applications
ResumoIonic liquids with chemical formula 1,3-dioctadecylimidazolium bromide and N-Octadecylpyridinium bromide were synthesized by conventional and microwave-assisted reactions, respectively. Ionic liquids tested as corrosion inhibitors after polarization curves displayed corrosion protection efficiency within 82–88% at 100 ppm for mild steel in a 1 M aqueous solution of sulfuric acid. Standard free energy indicated that corrosion inhibition occurred by a chemical adsorption process. Surface analysis (SEM, EDX) completed by XRD and Mössbauer spectroscopy indicated the presence of carbon species pertaining to inhibitor and corrosion products, which was rationalized in an inhibition mechanism.
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