Abstract
The study continues research into the dispersion of metals in pulsed discharges in nitric and sulfuric acid solutions. It was revealed that metal powders are the main product that forms in the dispersion of tungsten, titanium, molybdenum. It was found that the current pulse frequency fed to the electrodes significantly effects the productivity of the process. Thermodynamic calculations show that the atomic oxygen produced in the process oxidizes dispersed metal particles, and a film containing stable forms of metal oxides forms on their surfaces. Our results confirm the earlier stated assumptions: atomic oxygen is formed as the working solution undergoes thermal decomposition in the spark discharge zone, and it participates in oxidation of dispersed metal particles, forming a protective oxide film on the surface, which protects the metal from interacting with the environment.
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The study was carried out within the state task of the Institute of General and Inorganic Chemistry in the field of fundamental scientific research.
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Bairamov, R.K., Grigoriev, M.Y., Panasyuk, G.P. et al. Obtaining Tungsten, Titanium, and Molybdenum Powders during their Dispersion in Pulsed Discharges in Aqueous Solutions. Theor Found Chem Eng 56, 296–300 (2022). https://doi.org/10.1134/S0040579522030046
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DOI: https://doi.org/10.1134/S0040579522030046