Induced Codeposition of Alloys of Tungsten, Molybdenum and Rhenium with Transition Metals

Eliaz, Noam; Gileadi, E.

doi:10.1007/978-0-387-49489-0_4

Cited by 170 publications

(172 citation statements)

References 8 publications

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“…The case of electrodeposition of paramagnetics is unusualmost of these metals cannot be deposited alone from their aqueous solutions [30]. One of them is tungsten-direct reduction of its oxide is impossible because of low overvoltage for hydrogen evolution.…”

Section: Paramagneticsmentioning

confidence: 99%

Influence of constant magnetic field on electrodeposition of metals, alloys, conductive polymers, and organic reactions

Kołodziejczyk

Miękoś

Zieliński

et al. 2018

J Solid State Electrochem

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The paper presents and summarizes some research on constant magnetic field effects in chemistry. Metals and alloys electrodeposited under constant magnetic field have greater thickness and smoother surface with finest grains. Metallic materials deposited under the influence of uniform magnetic field may have stronger corrosion resistance, than those obtained without the presence of magnetic field. Constant magnetic field also causes an increase of the electropolymerization rate and yield of some organic reactions. Our research also shows that the presence of constant magnetic field affects the electrodeposition process of alloys and their morphology to a great extent. The effects of magnetic field on metals, alloys, composites, polymers and other materials are due to the Lorentz force and the magnetohydrodynamic effect. It is possible that the further development of magnetoelectrodeposition will allow for using the constant magnetic field to improve the properties of metal coatings, alloys, polymers, and other materials in the industry.

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Section: Paramagneticsmentioning

confidence: 99%

Influence of constant magnetic field on electrodeposition of metals, alloys, conductive polymers, and organic reactions

Kołodziejczyk

Miękoś

Zieliński

et al. 2018

J Solid State Electrochem

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“…Thus, citrate baths were extensively investigated [8][9][10][11] for Fe-W alloys electrodeposition. Also, ammonia was usually added to the electrolytes for alloys deposition as it increases the solubility of metal's complexes and influences on the species distribution, 12,13 and has a significant effect on W codeposition and bath stability. Such citrate-ammonia electrolytes enable to produce rather smooth and silvery to gray in appearance Fe-W coatings, 4,14 but the performance of those electrolytes is significantly affected by competing reactions of hydrolysis and complexing.…”

mentioning

confidence: 99%

Fe (III)-Based Ammonia-Free Bath for Electrodeposition of Fe-W Alloys

Nicolenco

Цынцару

Cesiulis

2017

J. Electrochem. Soc.

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Electrodeposited Fe-W alloys are the subject of extensive studies to be applied in versatile engineering applications, and many solutions based on Fe(II) complexes are described for their deposition. However, in aqueous solutions containing dissolved oxygen, Fe(II) compounds are unstable thermodynamically and tend to oxidize to Fe(III) state that decreases the sustainability of the baths. The aim of the present study was to develop an environment-friendly and thermodynamically stable Fe(III)-based electrolyte for electrodeposition of Fe-W alloys with tunable composition. It was found that: (i) concurrent use of two complexing agents as citric and glycolic acids stabilizes Fe(III)-based bath in neutral and weak alkaline medium (no precipitates are formed); (ii) the current efficiency of the process can reach up to 60-70%, which has never been reported before for Fe-W alloys electrodeposition; (iii) nanocrystalline Fe-W coatings containing 11-24 at.% of W can be obtained from Fe(III)-based glycolate-citrate bath at temperature range 20-65 • C. The increase in tungsten content in the alloy resulted in decreased grain size up to < 5 nm; (iv) smooth, free of cracks and having deposition rates up to 0.18 μm/cm 1 alloys are successfully electrodeposited at elevated temperatures from elaborated glycolate-citrate electrolyte.

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“…That is why some researchers recommend such coatings as an alternative to electrolytic chromium coatings [1,4,9]. A high number of papers are devoted to the deposition of such coatings, but there is still not determined concept of the deposition mechanism, which is affecting the advanced properties of these alloys [10][11][12]. Nanocrystalline Co-W coatings with advanced properties can be obtained by codeposition from different electrolytes, including from boron-gluconate bath [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

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

Белевский

Bobanova

Buravets

et al. 2017

Proccedings of International Scientific Conference "BALTTRIB 2017"

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The given study overview the results obtained for Co-W alloys electrodeposited from gluconate bath. Namely, the influence of different parameters (the concentration of the bath components, pH, temperature, cathodic current density, volume current density, hydrodynamic conditions, insoluble and soluble anodes) on the rate of electrodeposition and microhardness of the coatings has been investigated. The given research determine the conditions ensuring high deposition rate, microhardness and bath efficiency. It was shown, that the deposition rate, tungsten content and microhardness reach the maximum values at pH 6.5, regardless on the concentration of bath components. Also, it was detected the macroscopic size effect of microhardness, which is linked to the fact that for a fixed cathodic current density microhardness depends on volume current density. In addition, different anodes (Pt, graphite, W and Co-W) were investigated to reveal the anode influence on reaching the maximum values of the current efficiency and microhardness.

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Induced Codeposition of Alloys of Tungsten, Molybdenum and Rhenium with Transition Metals

Cited by 170 publications

References 8 publications

Influence of constant magnetic field on electrodeposition of metals, alloys, conductive polymers, and organic reactions

Influence of constant magnetic field on electrodeposition of metals, alloys, conductive polymers, and organic reactions

Fe (III)-Based Ammonia-Free Bath for Electrodeposition of Fe-W Alloys

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

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