Evaluation of Corrosion and Tribological Behavior of Electrodeposited Tungsten Alloys

Vernickaite, E.; Cesiulis, H.; Цынцару, Н.

doi:10.15544/balttrib.2017.36

Cited by 2 publications

(2 citation statements)

References 42 publications

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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].…”

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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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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“…First of all, that is to obtain information about the composition and structure of coatings those are deposited from solutions of various complex compositions, as well as to determine the dependence of functional properties of the alloys on electrodeposition conditions. The functional properties of such coatings are very diverse [1,2], but the most demanded for industry are heat resistance, hardness, and corrosion resistance [3][4][5].…”

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confidence: 99%

COMPARISON OF THE PROPERTIES OF CoW AND CoMo ALLOYS DEPOSITED BOTH FROM ALKALINE CITRATE AND CITRATE-PYROPHOSPHATE ELECTROLYTES

Yapontseva¹,

Кublanovsky²,

Maltseva³

2023

Ukr. Chem. Journ.

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The chemical composition, current efficiency and some properties of galvanic binary CoMo and CoW alloys, deposited from both alkaline citrate and citrate-pyrophosphate electrolytes, were studied. It is shown that the main difference between mono- and polyligand electrolytes is the mechanism of the electrodeposition process and the rate of passage of limiting stages preceding the formation of an electrochemically active complex. During electrolysis in a citrate solution, the limiting step is the mass transfer of [CoCit2]4– complexes, while in the citrate-pyrophosphate one, the process proceeds with kinetic control, and the hydrodynamic regime does not significantly affect the content of metals and the rate of their deposition. The use of a polyligand electrolyte makes it possible to increase the current efficiency for CoW alloys from 32.1 to 45.5% in the convective mass transfer mode and from 5.9 to 35.7% in the diffusion transfer mode. During electrodeposition from citrate-pyrophosphate electrolytes of the same composition of alloys of two different refractory metals, it was found that the current efficiency of the CoMo alloy is on average 20% higher than that of CoW. It has been found that at a close value of the content of the refractory component in X-ray amorphous alloys, the differences in the magnetic and corrosion properties of the coatings are determined by the nature of the refractory metal. Thus, during electrodeposition from a polyligand electrolyte, CoMo alloys have Ms 300–380 emu·cm-3 and Hc 60–72 Oe, while CoW alloys have Ms 22–45 emu·cm-3 and Hc 50–70 Oe. Both types of alloys are characterized by Mr/Ms – 0.2-0.3. The properties of CoW alloys deposited from a monoligand citrate electrolyte approach hard magnetic materials with Mr/Ms – 0.6–0.7.

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Evaluation of Corrosion and Tribological Behavior of Electrodeposited Tungsten Alloys

Cited by 2 publications

References 42 publications

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

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

COMPARISON OF THE PROPERTIES OF CoW AND CoMo ALLOYS DEPOSITED BOTH FROM ALKALINE CITRATE AND CITRATE-PYROPHOSPHATE ELECTROLYTES

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