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Edigaryan, A. A.; Polukarov, Yu. M.

doi:10.1023/a:1010308801540

Cited by 12 publications

(24 citation statements)

References 4 publications

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“…To enhance the stability of chromium(III) solutions, various complexing agents-urea [12], glycine [13], formic acid [14], etc.-are introduced into sulfate electrolytes. However, from these electrolytes, only thin chromium coatings are plated.…”

Section: Introductionmentioning

confidence: 99%

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Electroplating of Chromium-Cobalt Alloy Coatings from Sulfate Solutions

Spiridonov

2005

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Section: Introductionmentioning

confidence: 99%

“…However, from these electrolytes, only thin chromium coatings are plated. In recent years [14][15][16], new sulfate electrolytes containing oxalic acid have been elaborated; from such baths, coatings of chromium and its alloys up to 100 µ m thick are plated. Chromium coatings 300 µ m thick were reported to be obtained in [17].…”

Section: Introductionmentioning

confidence: 99%

Electroplating of Chromium-Cobalt Alloy Coatings from Sulfate Solutions

Spiridonov

2005

Prot Met

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“…It exists as a nickel-lattice-based substitutional solid solution. This mechanism of alloy formation is characteristic of nanocrystalline or amorphous systems [8,9]. The decrease in the alloy deposition rate with an increase in the molybdenum concentration in solution cannot be explained by changing the surface catalytical activity toward the nickel ion reduction and DMB oxidation, because the ratio of the two metals in the alloy remained unchanged for all molybdenum concentrations studied.…”

Section: Discussionmentioning

confidence: 99%

The Forming Conditions and Structure Characteristics of the Nickel-Molybdenum-Boron Chemico-Catalytic Coatings

et al. 2005

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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 1.0 wt % of boron are studied using XPS combined with layer-by-layer profile analysis. The alloys have crystalline nanostructure stable at temperatures of up to 500 ° C. Molybdenum is incorporated into the coatings preferably 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).

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“…A copper plate served as the cathode and platinum, as the anode. The deposition was performed without separating the anodic and cathodic space [2,3]. The current efficiency for the alloy was ~30%.…”

Section: Methodsmentioning

confidence: 99%

“…The intensities of the Auger lines were measured on the basis of the full swing of the peaks in a differential spectrum. To improve the resolution over the depth in a layer-by-layer analysis, we took into account factors, which affect the magnitude and accuracy of an estimate of experimentally obtained thicknesses of layers and transition zones: (1) we recorded only the Auger electrons from the crater center; (2) to diminish distortions of the profiles, we employed the expression…”

Section: Methodsmentioning

confidence: 99%

Distribution of components of binary nickel?chromium alloys electrodeposited from sulfate?oxalate solutions

et al. 2004

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The composition and distribution of elements over the thickness of electrodeposited nickel-chromium layers are studied by x-ray photoelectron and Auger electron spectroscopy techniques. During a layerby-layer etching, the Cr : Ni ratio varies with a period of 2-5 nm. This period and the amplitude of the ratio of concentrations of components increases with the current density. During alloy deposition on a copper cathode, the first to deposit is nickel, which exerts a catalytic effect on the chromium deposition, which in turn exerts a catalytic effect on the oxalate reduction to carbon. Once a deposit thicknesses of ~100 nm is reached, the alloy composition becomes constant. The deposits contain considerable amounts of carbon (in the form of graphitized structures and carbides), which increases from 0.6 to 2 wt % with the current density. The surface of the growing alloy 50-70 nm thick is rich in nickel and chromium hydroxides and organic compounds containing carboxyl groups.

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Cited by 12 publications

References 4 publications

Electroplating of Chromium-Cobalt Alloy Coatings from Sulfate Solutions

Electroplating of Chromium-Cobalt Alloy Coatings from Sulfate Solutions

The Forming Conditions and Structure Characteristics of the Nickel-Molybdenum-Boron Chemico-Catalytic Coatings

Distribution of components of binary nickel?chromium alloys electrodeposited from sulfate?oxalate solutions

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