The Forming Conditions and Structure Characteristics of the Nickel-Molybdenum-Boron Chemico-Catalytic Coatings
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The effect of the components of chemico-catalytic reduction solutions on the formation rate, composition, and structure characteristics of Ni-Mo-B-alloy coatings is studied. The chemical state of elements and the composition of the surface and bulk layers of the coating containing 11 to 22 wt % of molybdenum and 1.0 wt % of boron are studied using XPS combined with layer-by-layer profile analysis. The alloys have crystalline nanostructure stable at temperatures of up to 500°C. Molybdenum is incorporated into the coatings preferably in its completely reduced form, as a supersaturated solid solution in the nickel matrix. Yet at the same time, the deposits absorb a substantial amount of the absorbed intermediate products of the molybdate reduction to Mo(IV).
KeywordsNickel Inorganic Chemistry Solid Solution Boron Molybdenum
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- 1.Alvees, H., Fereira, M., and Koster, H., Mater. Sci. Forum., 1995, vol. 179–181, p. 449.Google Scholar
- 2.Mallory, G.O. and Horhn, T.R., Plating Surf. Finish., 1974, vol. 66, no.4, p. 40.Google Scholar
- 3.Charlot, G., Les Methodes de la Chimie Analytique. Analyse Quantitative Minerale, Paris: Masson, 1961.Google Scholar
- 4.Nemodruk, A.A. and Karalova, Z.K., Analiticheskaya khimiya bora (Analytical Chemistry of Boron), Moscow: Nauka, 1964.Google Scholar
- 5.Sviridov, V.V., Vorob'eva, T.N., Gaevskaya, T.V., and Stepanova, L.I., Khimicheskoe osazhdenie metallov iz vodnykh rastvorov (Chemical Deposition of Metals from Aqueous Solutions), Minsk: Universitetskoe Izd., 1987.Google Scholar
- 6.Drovosekov, A.B., Ivanov, M.V., Krutskikh, V.M., Loubnin, E.N., and Polukarov, Yu.M., Zashch. Met., 2005, vol. 41, no.1, p. 55.Google Scholar
- 7.Bystrozakalennye metally (Flashly Quenched Metals), Kantor, B.M., Ed., Moscow: Metallurgiya, 1983.Google Scholar
- 8.Gorbunova, K.M. and Polukarov, Yu.M., Itogi Nauki Tekh., Ser.: Elektrokhim., Moscow: VINITI, 1966, p. 59.Google Scholar
- 9.Edigaryan, A.A., Goryunov, G.E., Loubnin, E.N., and Polukarov, Yu.M., Elektrokhimiya (in press).Google Scholar