Features of the local activation of aluminum in the presence of bicarbonate ions

Keywords: Sodium bicarbonate, Aluminum, Local activation, Passivation, Voltammetry, Chronoamperometry, Scanning electron microscopy

Abstract

The purpose of the article is to study the effect of bicarbonate ions on the local activation of aluminum at a temperatureof 25 °C.

The features of local activation of aluminum in the presence of bicarbonate ions (2·10–4–4·10–3 M) were studied using the methods of voltammetry, chronoamperometry, optical and scanning electron microscopy, and X-ray spectral microanalysis.

As a result, we established the range of sodium bicarbonate concentrations, in which there is local activation of aluminum; obtained experimental data on the dependence of the main quantitative characteristics of the process (potential of pitting formation, potential of local activation, and induction period) on the concentration of sodium bicarbonate. Formal kinetic approach was used to propose a mechanism for the local activation of aluminum in hydrocarbonate media 

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Author Biographies

Tatyana A. Minakova, Air Force Military Educational and Scientific Centre “Zhukovsky and Gagarin Air Force Academy”, 54a Starykh Bol’shevikov ul., Voronezh 394064, Russian Federation

Cand. Sci. (Chem.), Associate
Professor, Department of Physics and Chemistry,
Military Educational-Research Centre of the Air Force
“Air Force Academy named after Professor
N. E. Zhukovsky and Yu. A. Gagarin” (Voronezh,
Russian Federation)

Svetlana A. Kaluzhina, Voronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian Federation

Dr. Sci. (Chem.), Professor,
Department of Physical Chemistry, Voronezh State
University (Voronezh, Russian Federation)

Evgeniya N. Aksyonova, Voronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian Federation

Master of Physical
Chemistry Department, Voronezh State University
(Voronezh, Russian Federation)

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Published
2024-08-28
How to Cite
Minakova, T. A., Kaluzhina, S. A., & Aksyonova, E. N. (2024). Features of the local activation of aluminum in the presence of bicarbonate ions. Kondensirovannye Sredy I Mezhfaznye Granitsy = Condensed Matter and Interphases, 26(3), 464-473. https://doi.org/10.17308/kcmf.2024.26/12277
Section
Original articles