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Electrochemical Study of Sintered Aluminum-Based Materials and MAO Coatings on Their Surfaces

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Abstract—

The electrochemical behavior of sintered materials from powder aluminum, its compositions with copper (1, 2, and 3%), and coatings on their surfaces formed by micro-arc oxidation (MAO), is studied in a 3% NaCl solution. The values of the anodic and cathodic current densities on the polarization dependences for compact aluminum samples are approximately 4 and 2 times lower compared to sintered powder aluminum, which, in turn, is less corrosive than aluminum-copper composites. MAO coatings lead to a decrease in anodic and cathodic currents, which indicates their positive effect on the corrosion resistance of these materials. Using scanning electron microscopy and X-ray phase analysis, the structure of aluminum-copper composites with MAO coatings after electrochemical studies is examined.

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Funding

This work was financially supported by The Grant Council of the President of Russia (grant no. МK 54.2019.8).

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Authors and Affiliations

  1. Keldysh Research Center, 125438, Moscow, Russia

    S. V. Savushkina & L. E. Agureev

  2. Moscow Aviation Institute (National Research University), 125993, Moscow, Russia

    S. V. Savushkina & A. V. Apelfeld

  3. Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 119991, Moscow, Russia

    M. V. Gerasimov, N. L. Bogdashkina & V. E. Ignatenko

Authors
  1. S. V. Savushkina
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  2. A. V. Apelfeld
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  3. L. E. Agureev
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  4. M. V. Gerasimov
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  5. N. L. Bogdashkina
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  6. V. E. Ignatenko
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Corresponding authors

Correspondence to S. V. Savushkina or L. E. Agureev.

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Translated by D. Kharitonov

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Savushkina, S.V., Apelfeld, A.V., Agureev, L.E. et al. Electrochemical Study of Sintered Aluminum-Based Materials and MAO Coatings on Their Surfaces. J. Surf. Investig. 15, 285–291 (2021). https://doi.org/10.1134/S1027451021020130

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  • DOI: https://doi.org/10.1134/S1027451021020130

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