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Adsorption of IFKhAN-92 corrosion inhibitor on low-carbon steel from hydrochloric-acid solution

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Abstract

Adsorption of IFKhAN-92 inhibitor on low-carbon steel from 2.0 M HCl solution was studied with the use of impedance spectroscopy. The adsorption is found to be described by the Temkin isotherm with relatively high free adsorption energy ΔG ads = 42 kJ/mol. The inhibitor is proposed to be chemisorbed on the surface. This hypothesis is supported by the satisfactory approximation of the adsorption kinetics by the Roginsky-Zeldovich equation and the strong protective aftereffect of the inhibitor adsorbed on the steel.

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Authors and Affiliations

  1. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119071, Russia

    Ya. G. Avdeev & Yu. I. Kuznetsov

  2. Moscow State Pedagogical University, ul. M. Pirogovskaya 1/1, Moscow, 119991, Russia

    A. Yu. Luchkin

Authors
  1. Ya. G. Avdeev
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  2. A. Yu. Luchkin
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  3. Yu. I. Kuznetsov
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Correspondence to Ya. G. Avdeev.

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Original Russian Text © Ya.G. Avdeev, A.Yu. Luchkin, Yu.I. Kuznetsov, 2012, published in Korroziya: Materialy, Zashchita, 2012, No. 10, pp. 23–27.

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Avdeev, Y.G., Luchkin, A.Y. & Kuznetsov, Y.I. Adsorption of IFKhAN-92 corrosion inhibitor on low-carbon steel from hydrochloric-acid solution. Prot Met Phys Chem Surf 49, 865–868 (2013). https://doi.org/10.1134/S2070205113070046

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  • DOI: https://doi.org/10.1134/S2070205113070046

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