METALMATRIX PROTECTIVE COATINGS WITH NANOCOMPONENTS: FORMATION, PROPERTIES, APPLICATION

Electrodeposition conditions, structure and physicomechanical
properties (microhardness, coupling with a basis, internal tension,
wear resistance, corrosion currents) of metalmatrix composite coverings on the basis of nickel with nanopowder (NP) of titanium carbide (dimensional range (0.02 – 0.08 microns)) and its micropowder (MT) (1 – 5 micron) were investigated. It was established that at electrodeposition of nickel from electrolyte – suspension metal nickel at first is besieged on the nanoparticles weighed in electrolyte then nanoparticles are strongly attached to a substrate, easily and evenly grow into a deposit. Unlike micropowder, nanopowder of carbide is not only a filler, and acts as a strong structure-forming agent in the course of electrocrystallization of nickel and provides its mass multigerminal character that leads to formation of coverings with small sizes of structural fragments, characteristic opaque color, almost pore-free with the increased physicomechanical properties. The coverings contained, %: Ni – 97.39; O – 1.79; Ti – 0.65; C – 0.17. Annealing of coverings in vacuum promotes increased their coupling with a basis in 1.3 times, microhardness - in 1.2 times, wear resistance in 1.3 times. Therefore the Ni – NP TiC covering can be recommended for anticorrosive protection and hardening of the details working very hard at average district speeds and low specific loadings

1. Saifullin R.S. Researches in the sphere of creation of composite electrochemical coatings (CEC) with dispersed phase of micro- and nanoparticles. Vestnik Kazanskogo tekhnologicheskogo universiteta. 2009, no. 6, pp. 80–90. (In Russ.).

2. Desyatkova G.I., Yagodkina L.M., Savochkina I.E., Khaldeev G.V. Composite electrochemical coatings based on nickel. Zashchita metallov. 2002, Vol. 38, no. 5, pp. 525–529. (In Russ.).

3. Tsupak T.E. Vysokoproizvoditel’nye protsessy elektroosazhdeniya nikelya i splava nikel’ – fosfor iz elektrolitov, soderzhashchikh karbonovye kisloty [High-perfermance processes of electrodeposition conditions of nickel and nickel – phosphorus alloy from the electrolytes containing carboxylic acids]: Dr. Chem. Sci. diss. Moscow, 2008. 40 p. (In Russ.).

4. Dolmatov V.Yu. Modern industrial detonating nanodiamond technologies (ND) and the main field of their usage. In: Nanotekhnologii – proizvodstvu – 2006: Trudy mezhdunarodnoi nauchno-prakticheskoi konferentsii [Nanotechnologies – for production – 2006: roceedings of the International scientific and practical conference] Moscow: Yanus-K, 2006, pp. 113–151. (In Russ.).

5. Shiryaeva L.S., Nozdrin I.V., Galevskii G.V., Rudneva V.V. The research of composite electrochemical coatings of nickel – chromium nanocarbonitrides. Gal’vanotekhnika i obrabotka poverkhnosti. 2014, no. 2, Vol. XXII, pp. 51–57. (In Russ.).

6. Rudneva V.V., Galevskii G.V. Peculiarities of electrodeposition conditions and features of composite coatings with nanocomponents. Izvestiya VUZov. Chernaya metallurgiya = Izvestiya. Ferrous Metallurgy. 2007, no. 3, pp. 39–43. (In Russ.).

7. Kolpak V.P. Supply with crystallizer tubes of Continuous Casting Machines at JSC «Zapsibmetcombinat». In: 4-aya Mezhdunarodnaya konferentsiya «Oborudovanie i tekhnologii termicheskoi obrabotki metallov i splavov»: Sb. dokladov [The 4th International Conference “Equipment and technology of heat treatment of metals and alloys”: Reports]. Kharkiv: KhGU, 2003, pp. 58–60.

8. Sukhovol’skii S.V. Influence of chromium-nickel coatings of a crystallizer on the quality of continuous casting work pieces. In.: Aktual’nye problemy elektrometallurgii, svarki, kachestva. T. 1: Trudy Mezhdunarodnoi nauchno-prakticheskoi konferentsii. [Actual problems of electrometallurgy, welding, quality. Vol. 1: Proceedings of the International scientific and practical conference]. Novokuznetsk: SibGIU, 2006, pp. 142–144. (In Russ.).

9. Gamayunov I.G., Baranov A.N. Corrosion protection of steel bars in aluminum electrolyzers. In.: Perspektivy razvitiya tekhnologii, ekologii i avtomatizatsii khimicheskikh, pishchevykh i metallurgicheskikh proizvodstv: Materialy nauchno-prakticheskoi konferentsii

10. [Perspectives of technology development, ecology and automation of chemical, food and metallurgical processing: Works of scientific-practical conference]. Irkutsk: IrGTU, 2008, pp. 272–274. (In Russ.).

11. Gamburg Yu.D. Gal’vanicheskie pokrytiya. Spravochnik po primeneniyu [Galvanic coatings. Usage reference book]. Moscow: Tekhnosfera, 2006. 216 p.