Saint Petersburg Mining University, Saint Petersburg, Russia:

A. G. Syrkov, Professor at the Department of General and Applied Physics, Doctor of Technical Sciences, e-mail: Syrkov_AG@pers.spmi.ru
A. N. Kushchenko, Assistant Lecturer at the Department of General and Applied Physics, Candidate of Technical Sciences, e-mail: Kuschenko_AN@pers.spmi.ru
M. O. Silivanov, Associate Professor at the Department of General and Applied Physics, Candidate of Chemical Sciences, e-mail: Silivanov_MO@pers.spmi.ru
V. V. Taraban, Associate Professor at the Department of Higher Mathematics, Candidate of Physical and Mathematical Sciences, e-mail: Taraban_VV@pers.spmi.ru

metal samples obtained by solid-state hydride synthesis (SHS) of metals and layering of different-sized molecules (LDM) of ammonium and organosilicon compounds has been carried out. It was found that the dispersed metal products of SHS are significantly more hydrophobic (on average, by an order of magnitude) compared to metals modified in vapors of industrial water repellents. It has been established that among the metal products of SHS based on nickel, copper, and iron with a carbosiloxane nanofilm on the surface, the samples based on iron are the most hydrophobic and heat-resistant in air. The most hydrophilic and chemically active samples were nickel-based, which had a fairly developed surface (about 50 m²/g). The revealed patterns of regulation of the surface properties and hydrophobicity of metal synthesis products are associated with the strongest interatomic metal-silicon chemical interaction in the surface layer of iron-based samples, confirmed by XPS spectroscopy. When a metal product is obtained by successive reduction of the initial solid- phase raw material (ore) in methyldichlorosilane (MDCS) vapor and in a methane stream, MDCS performs the functions of a reducing agent and modifier of the metal surface. The metal at the time of appearance, being in a reducing medium, has a reactive surface and actively interacts with MDCS molecules containing chemically stable Si-C groups, with the formation of a strong chemisorption bond between the metal and the protective carbosiloxane film formed during synthesis, no more than 4–5 nm. Such a mechanism of the process under SHS conditions makes it possible to carry out the reduction and useful modification of the metal within the framework of a single technological process and in one reactor.
This research paper was recommended for publication by the organizing committee of the International Conference on Nanophysics and Nanomaterials, 24-25 November 2021, Saint Petersburg, Mining University.

1. Mineev G. G., Mineeva T. S., Zhuchkov I. A., Zelinskaya E. V. Theory of metallurgical processes. Irkutsk : Izdatelstvo Irkutskogo gosudarstvennogo tekhnicheskogo universiteta, 2010. 522 p.
2. Sizyakov V. M., Bazhin V. Yu., Brichkin V. N., Petrov G. V. Non-ferrous metallurgy. Saint Petersburg : Sankt-Peterburgskiy gornyi universitet, 2015. 392 p.
3. Schenck J., Lungen H. B. Potentials of direct and smelting reduction processes for an efficient application in Europe. Chernye Metally. 2017. No. 2. pp. 25–31.
4. Konchus D. A., Sivenkov A. V. A surface structure formation of stainless steel using a laser. Materials Science Forum. 2021. Vol. 1022. pp. 126–132.
5. Semenova I. V., Florianovich G. M., Khoroshilov A. V. Corrosion and corrosion protection. Moscow : FIZMATLIT, 2010. 416 p.
6. Chorkendorf I., Naymantsvedrayt Kh. Modern catalysis and chemical kinetics. Dolgoprudny : Intellekt, 2010. 599 p.
7. Yang F, Ding J., Liu H. et al. Study on anti-corrosion technology and corrosion mechanism of liquid gaIn alloy to copper. Materials Reports. 2021. Vol. 35, No. 20. pp. 20076–20080 and 20112. DOI: 10.11896/cldb.20060249.
8. Remzova E. V. Surface-modified metals and related heterogenous systems and nonlinearity of their chemical and physical properties : Candidate of Chemical Sciences dissertation. Voronezh : Voronezhskiy gosudarstvennyi universitet, 2013. 140 p.
9. Sivenkov A. V., Nikitina V. O., Serdiuk N. A., Konchus D. A., Pryakhin E. I. Creating a model of diffusion deposition of metal coatings from melts of lowmelting metals. IOP Conference Series: Materials Science and Engineering. 2019. Vol. 560, Nо. 1. pp. 1–6. DOI: 10.1088/1757-899X/560/1/012188.
10. Pozhidaeva S. D., Ageeva L. S., Ivanov A. M. Oxidation of zinc and tin with acids at room temperatures: A comparative study. Zapiski Gornogo instituta. 2019. Vol. 235. pp. 38–46. DOI: 10.31897/PMI.2019.1.38.
11. Nazarova E. V. Adsorption of ammonium and organosilicon compounds and how it influences the tribochemical properties of metals (Al, Cu, Ni) : Candidate of Chemical Sciences dissertation. Saint Petrsburg, 2016. 139 p.
12. Syrkov A. G., Bazhin V. Yu., Mustafaev A. S. Nanotechnology and nanomaterials. Aspects of physics and mineral raw materials. Saint Petrsburg : Politekh-Press, 2019. 244 p.
13. Yachmenova L. A. Developing an energy and resource saving technology for producing metallic products with the help of hydrides as reducing and modifying agents : Candidate of Technical Sciences dissertation. Saint Petrsburg, 2021. 126 p.
14. New Materials. Preparation, properties and applications in the aspect of nanotechnology. New York : Nova Science Publishers, 2020. 264 p.
15. Slinyakova I. B., Denisova T. I. Organosilicon adsorbents: Production, properties, application. Kiev : Naukova dumka, 1988. 192 p.
16. Zhao Y., Xu J. B., Hu J. M. et al. Electrodeposited superhydrophobic mesoporous silica films co-embedded with template and corrosion inhibitor for active corrosion protection. Applied Surface Science. 2020. Vol. 508. p. 145242. DOI: 10.1016/j.apsusc.2019.145242.
17. Yang, Z., Liu X., Tian Y. Novel metal-organic super-hydrophobic surface fabricated by nanosecond laser irradiation in solution. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2020. Vol. 587. p. 124343. DOI: 10.1016/j.colsurfa.2019.124343.
18. Thanasekaran P., Su C. H., Liu Y. H., Lu K. L. Hydrophobic metal – organic frameworks and derived composites for microelectronics applications. Chemistry – A European Journal. 2021. Vol. 27. pp. 16543–16563. DOI: 10.1002/chem.202100241.