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The process of ternary Co-W(Mo)-Zr alloys deposition on a copper substrate from pyrophosphate-citrate electrolytes in a pulsed mode was investigated. The effect of temperature, the pH of the electrolyte, and the current density on the composition, surface morphology, and current efficiency of ternary electrolytic cobalt alloys with refractory metals was studied. The resulting coatings are characterized by a uniformly developed surface without cracks, which provides a sufficiently high and reproducible microhardness. It was found that the size of the globules on the alloy surface decreases with increasing the current density up to 10 A/dm2. It was found that an increase in temperature favorably affects the current efficiency and microhardness of Co-W-Zr coatings. The regimes of the electrosynthesis of coatings by cobalt-tungsten-zirconium alloys with a given level of the surface development and microhardness were substantiated.

The functional properties of ternary Co-W-Zr(ZrO₂) alloys obtained in a pulsed mode from pyrophosphate-citrate electrolytes are discussed. The obtained coatings are characterized by a uniformly developed surface without cracks and a sufficiently high and reproducible microhardness. It was determined that the size of the globules on the alloy surface decreases with increasing of the current density to 10 A/dm². It was found that increase of temperature favorably affects the current efficiency of the alloy and the microhardness of the Co-W-Zr(ZrO₂) coating. The modes of electrosynthesis of the coatings by cobalt-tungsten-zirconium alloys are substantiated, an their influence on the functional properties of the alloy and current efficiency is investigated. Обговорено функціональні властивості потрійних сплавів Co-W-Zr(ZrO₂), отриманих в імпульсному режимі з пірофосфатно-цитратних електролітів. Отримані покриття характеризуються рівномірно розвиненою поверхнею без тріщин і достатньо високою відтворюваною мікротвердістю. Встановлено, що розмір глобул на поверхні сплаву зменшується зі збільшенням густини струму до 10 А/дм². Встановлено, що підвищення температури сприятливо впливає на вихід по струму сплаву та мікротвердість покриття Co-W-Zr(ZrO₂). Обґрунтовано режими електросинтезу покриттів кобальтовольфрамоцирконієвими сплавами, досліджено їх вплив на функціональні властивості сплаву та вихід по струму.