THE INFLUENCE OF GLUCONATE BATH PARAMETERS ON THE RATE OF ELECTRODEPOSITION AND MECHANICAL PROPERTIES OF Co–W COATINGS

Белевский, С. С.; Bobanova, J.; Buravets, V. A.; Gotelyak, A. V.; Danil’chuk, V. V.; Силкин, С. А.; Цынцару, Н.; Дикусар, А. И.

doi:10.15544/balttrib.2017.03

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…Осаждение Co-W сплавов возможно при комнатной температуре, но оптимальные температуры, выбранные исследователями, существенно выше комнатной [27][28][29][30].…”

Section: Introductionunclassified

Effect of Citrate Electrolyte Temperature on the Properties of Co-W Coatings

Silkin,

Kusmanov,

Perkov

2023

EOM

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The influence of temperature on the properties of nanocrystalline Co-W coatings obtained from a citrate electrolyte at pH 6.7 and deposited under natural convection conditions was studied. The influence of the electrolyte temperature on the morphology, composition, structure and roughness of coatings, as well as their corrosion and tribological properties, is demonstrated. It is shown that the structure of the coating can change from the X-ray amorphous to the crystalline one when the deposition temperature of the coating is increased to 90 ºС. The average value of the mass wear of Cо-W coatings formed at 80 ºС and measured under the linear friction condition of 0.08 mg, and 62 times lower than that of a Cr coating (4.95 mg) and 84 times lower that at the surface of steel SK-5 (6.71 mg). When testing by the reciprocating wear method, the value of the volumetric wear of Co-W coatings obtained in the temperature range 50–70 ºС was 0.00109 mm3, which is 55 times lower than the wear value of a Cr coating (0.0596 mm3) and 41 times lower than that of the steel SK-5 surface (0.0449 mm3). The paper also shows a slight decrease in the currents of corrosion coatings and a decrease in the dispersion values of the corrosion potentials obtained after mechanical polishing of the surface of the coatings at temperatures in the range of 20–90 ºС. It is shown that under the corrosive effect of 3.5% sodium chloride, an increase in the deposition temperature of the coating is accompanied by a slight in-crease in the corrosion current.

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Section: Introductionunclassified

Effect of Citrate Electrolyte Temperature on the Properties of Co-W Coatings

Silkin,

Kusmanov,

Perkov

2023

EOM

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“…Plating bath composition and deposition parameters influence tungsten-containing alloy coating composition and microstructure [9]. The electrodeposition of Co-W alloys is reported from various electrolytes such as gluconate [10,11], citrate-borate [12,13], citrate-ammonia [14]. Citrate is one of the most commonly used additives in electrodeposition because it is a powerful complexing agent for a wide range of metals, including cobalt, nickel, copper, and tungsten.…”

Section: Introductionmentioning

confidence: 99%

Effects of pH and Current Density on Microstructure and Hardness of the Cobalt-Tungsten Coating.

Oskay

2022

Adıyaman Üniversitesi Mühendislik Bilimleri Dergisi

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In this study, cobalt-tungsten coatings were electrodeposited on copper substrates. Nanocrystalline and amorphous cobalt tungsten alloys were electrodeposited from citrate-boric acid baths. The characterization of the alloy coatings was carried out by scanning electron microscopy (SEM), X-ray fluorescence (XRF), and X-ray diffraction (XRD). The most significant factors, such as current density and pH of the electrolyte that affect the morphology, tungsten composition, and microhardness value, were studied. The tungsten content of the electrodeposits varied 11 to 46% by changing process variables. The microhardness value of the coatings was decreased dramatically when the tungsten composition exceeded 35%. Response surface methodology was used to construct models for predicting microhardness value and tungsten composition of the coating. The optimal conditions for the electrodeposition were found as follows: current density of 5A/dm2 and pH 6. Under optimal conditions, the coating exhibits a hardness of 570 HV.

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THE INFLUENCE OF GLUCONATE BATH PARAMETERS ON THE RATE OF ELECTRODEPOSITION AND MECHANICAL PROPERTIES OF Co–W COATINGS

Cited by 2 publications

References 15 publications

Effect of Citrate Electrolyte Temperature on the Properties of Co-W Coatings

Effect of Citrate Electrolyte Temperature on the Properties of Co-W Coatings

Effects of pH and Current Density on Microstructure and Hardness of the Cobalt-Tungsten Coating.

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