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1-Ethyl 3-methylimidazolium thiocyanate ionic liquid as corrosion inhibitor of API 5L X52 steel in H2SO4 and HCl media

Mónica Corrales-Luna - No affiliation found

2019/06/01 Full-length article DOI: 10.1016/j.corsci.2019.03.041 Journal: Corrosion Science

Abstract:

Highlights•1-Ethyl 3-methylimidazolium thiocyanate is experimentally and theoretically evaluated as corrosion inhibitor in H2SO4 and HCl solutions.•Ethyl 3-methylimidazolium thiocyanate as inhibitor presents a better efficiency in H2SO4 than that in HCl solution.•The behavior of 1- ethyl 3-methylimidazolium thiocyanate in acid media follows the Langmuir´s adsorption isotherm.•Simulation of interactions between 1- ethyl 3-methylimidazolium thiocyanate and SO42− and Cl- on Fe and Fe2O3 (110) plane surfaces confirms a better adsorption behavior in H2SO4.