The Forming Conditions and Structure Characteristics of the Nickel
Molybdenum
Boron Chemico-Catalytic Coatings
A. B. Drovosekov, M. V. Ivanov, V. M. Krutskikh, E. N. Loubnin, and Yu. M. Polukarov
Institute of Physical Chemistry, Russian Academy of Sciences,
Leninskii pr. 31, Moscow, 119991 Russia
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Received September 27, 2004
Abstract — 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 1.0wt % of boron are studied using XPS combined with layer-by-layer profile analysis. The alloys have crys-talline nanostructure stable at temperatures of up to 500°C. Molybdenum is incorporated into the coatings pref-erably 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).