Abstract
The method of electrochemical impedance spectroscopy was used to study the adsorption of an IFKhAN-92 inhibitor, 3-substituted 1,2,4-triazole, on low-carbon steel from 2.0 M H2SO4 (22°C). It was shown that the Temkin isotherm with a relatively high value of free energy of adsorption (−ΔGads) = 49 kJ/mol described its adsorption. It was suggested that the inhibitor adsorption has a chemisorption nature, which is testified both by the description of the kinetics of adsorption by the Roginsky–Zeldovich equation and a high protective aftereffect of the inhibitor adsorbed on the steel surface.
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This study was carried out within the framework of the Program of Fundamental Scientific Investigations of State Academies of Sciences for 2013−2020 “Development of Fundamental Scientific Foundations for the Protective Effect of Metal Corrosion Inhibitors in Gas and Condensed Media, Nanocomposites, and Paint and Conversion Coatings,” state registration no. AAAA-A18-118121090043-0.
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Avdeev, Y.G., Luchkin, A.Y. & Kuznetsov, Y.I. Adsorption of IFKhAN-92 Inhibitor on Low Carbon Steel from Sulfuric Acid Solution. Prot Met Phys Chem Surf 56, 1244–1248 (2020). https://doi.org/10.1134/S2070205120070035
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DOI: https://doi.org/10.1134/S2070205120070035