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Features of the Anode Behavior of a Combined Titanium–Aluminum Electrode and the Physicochemical Properties of the Products of Its Dissolution

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Abstract

The electrochemical behavior of a combined titanium–aluminum electrode in aqueous solutions of 1.0 M sodium chloride with additions of hydrofluoric acid has been studied. It is shown that, under open-circuit conditions, the combined electrode is a short-circuited element, the surface of which is practically equipotential and is characterized by the value of the potential located between the values of the corrosion potentials of aluminum and iron electrodes. With a low content of hydrofluoric acid, practically the entire anode current flows through the surface of the aluminum component of the combined electrode. In addition, with an increase in the HF concentration to 0.5 M, the titanium electrode is activated and the fraction of the current flowing is almost the same as the fraction of the current of the aluminum component of the anode. This makes it possible to regulate the dissolution rates of aluminum and titanium during their joint oxidation during the synthesis of precursors of metal oxides of a given phase composition by changing the ratio of the areas of the anode components.

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Funding

This work was performed on the equipment of the Center for Collective Use “Nanomaterials and Nanotechnologies” of the Kazan National Research Technological University within the framework of the state task no. 075-00315-20-01 “Catalysis in Oil Refining and Petrochemicals” for 2020–2022.

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  1. Kazan National Research Technological University, Kazan, Russia

    A. F. Dresvyannikov, Ya. V. Ivshin, Pham Tien Chong & A. I. Khairullina

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  1. A. F. Dresvyannikov
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  2. Ya. V. Ivshin
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  3. Pham Tien Chong
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  4. A. I. Khairullina
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Correspondence to A. F. Dresvyannikov.

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Dresvyannikov, A.F., Ivshin, Y.V., Chong, P.T. et al. Features of the Anode Behavior of a Combined Titanium–Aluminum Electrode and the Physicochemical Properties of the Products of Its Dissolution. Prot Met Phys Chem Surf 58, 90–98 (2022). https://doi.org/10.1134/S2070205122010075

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  • DOI: https://doi.org/10.1134/S2070205122010075

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