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Features of the occurrence of electrochemical processes in contact of sodium chloride solutions with the surface of superhydrophobic coatings on titanium

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Abstract

A joint analysis of the results of electrochemical studies and the evolution of the parameters of a sodium chloride solution droplet in contact with the coating under test reveals the pattern of changes in the surface state which result from the electrochemical reactions and adsorption-desorption processes at the coating/electrolyte interface. Features of the corrosion process are studied on titanium samples with different protective layers on the surface: (1) a natural oxide, (2) a coating prepared via plasma electrolytic oxidation (PEO coating), (3) a PEO coating with a hydrophobic layer, and (4) a PEO coating with a superhydrophobic nanocomposite layer. The best protective properties in a chloride-containing electrolyte are exhibited by the superhydrophobic nanocomposite coating. The mechanism of corrosion protection of this coating is formulated.

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Authors and Affiliations

  1. Institute of Chemistry, Far East Branch, Russian Academy of Sciences, Vladivostok, Russia

    S. V. Gnedenkov, S. L. Sinebryukhov, V. S. Egorkin & D. V. Mashtalyar

  2. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow, Russia

    A. M. Emel’yanenko, D. A. Alpysbaeva & L. B. Boinovich

Authors
  1. S. V. Gnedenkov
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  2. S. L. Sinebryukhov
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  3. V. S. Egorkin
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  4. D. V. Mashtalyar
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  5. A. M. Emel’yanenko
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  6. D. A. Alpysbaeva
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  7. L. B. Boinovich
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Corresponding author

Correspondence to L. B. Boinovich.

Additional information

Original Russian Text © S.V. Gnedenkov, S.L. Sinebryukhov, V.S. Egorkin, D.V. Mashtalyar, A.M. Emel’yanenko, D.A. Alpysbaeva, L.B. Boinovich, 2012, published in Elektrokhimiya, 2012, Vol. 48, No. 3, pp. 369–379.

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Gnedenkov, S.V., Sinebryukhov, S.L., Egorkin, V.S. et al. Features of the occurrence of electrochemical processes in contact of sodium chloride solutions with the surface of superhydrophobic coatings on titanium. Russ J Electrochem 48, 336–345 (2012). https://doi.org/10.1134/S1023193512020048

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  • DOI: https://doi.org/10.1134/S1023193512020048

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