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Trejo, G.; Ortega, R.; Meas, Y.; Chaînet, Eric; Ozil, P.

doi:10.1023/a:1024466604939

Cited by 56 publications

(50 citation statements)

References 19 publications

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“…It means that the zinc deposition was hindered, while cobalt deposition was enhanced in the presence of citrate. Similar results were obtained by Trejo et al 18 using benzidilacetone in the bath. However, new experiments concerning the local pH measurements on the electrode/solution interface are still needed to reach a final conclusion about this topic.…”

Section: Electrodeposition Experimentssupporting

confidence: 90%

“…These results and the theoretical mass obtained from Faraday's law were used to calculate the E f value for each deposition time 18,25,26 . The content of each metal in the coatings was calculated as the % m/m Co and % m/m Zn, using Equations 1 and 2, respectively.…”

Section: Electrodeposition Experimentsmentioning

confidence: 99%

“…For this purpose, a complexant agent or a leveling additive can be added to an electrodeposition bath, causing several changes on the reduction mechanism of the ions in the solution and/or in the activation energy of the electrode surface [15][16][17] . For this reason, it is possible to find several works concerning the production of Zn-Co coatings from acidic or alkaline baths, containing additives and/or complexant agents 7,8,10,18 . Despite its well known toxicity and the rigorous maintenance control to avoid environmental problems 19,20 , the traditional cyanide-containing alkaline baths are sometimes used for electroplating of Zn and Zn alloys.…”

Section: Introductionmentioning

confidence: 99%

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Electrodeposition of Cobalt Rich Zn-Co alloy Coatings from Citrate Bath

2014

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Section: Electrodeposition Experimentssupporting

confidence: 90%

Section: Electrodeposition Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electrodeposition of Cobalt Rich Zn-Co alloy Coatings from Citrate Bath

2014

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“…The composition of each electrolyte is given in Table 5. The voltammetric experiments have been conducted by a number of authors to study the anomalous codeposition of various metals [15,23,24]. Abou-krisha used cathodic polarization experiments to study zincnickel codeposition [23].…”

Section: Voltammetric Studiesmentioning

confidence: 99%

Effects of thiourea and urea on zinc–cobalt electrodeposition under continuous current

2007

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The effect of thiourea and urea on zinc-cobalt alloys obtained from chloride baths under continuous current deposition are described and discussed. The deposit morphology was analyzed using Scanning Electron Microscopy (SEM) and an X-Ray Diffraction (XRD) was used to determine the preferred crystallographic orientations of the deposits. The use of additives does not refine the grain size of the Zn-Co alloy and an especially porous alloy was produced in the presence of urea. The preferred crystallographic orientations of zinc-cobalt alloys do not change in the presence additives. Zinc-cobalt alloys were without texture in the presence and absence of additives. Also, in the absence of additive and in the presence of urea, the XRD lines of the Zn-Co alloys are slightly shifted with respect to the pure zinc XRD lines, whereas, in the presence of thiourea, the XRD lines are not shifted. The alloy composition was examined using Energy Dispersive X-ray Fluorescence Spectroscopy (EDXRF). The percentage of cobalt in the alloy decreases slightly from 1.04 to 0.91 wt.% in the presence of urea and in the presence of thiourea it increases from 1.04 to 7.70 wt.%. Voltammetric studies show that thiourea increases the reduction rate of cobalt. This explains the increase in cobalt percentage in the alloy in the presence of thiourea.

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“…15 Yu et al reported a zinc instantaneous nucleation from acetate baths on GCE with a deviation to progressive nucleation when the potential applied is increased. 16 Sonneveld et al found an instantaneous nucleation with a hemiespherical 3D growth on GCE from zincate solutions.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical study about zinc electrodeposition onto GCE and HOPG substrates

Granados-Ner¹,

Mendoza-Huízar²,

Ríos-Reyes³

2011

Quím. Nova

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We carried out an electrochemical study about zinc electrodeposition onto GCE and HOPG substrates from an electrolytic plating bath containing 0.01M ZnSO 4 + 1M (NH 4 ) 2 SO 4 at pH 7. Under our experimental conditions the predominant chemical species was the complex [ZnSO 4 (H 2 O) 5 ]. The chronoamperometric study showed that zinc electrodeposition follows a typical 3D nucleation mechanism in both substrates. The average ΔG calculated for the stable nucleus formation was 6.92 x 10 -21 J nuclei −1 and 1.35 x 10 -20 J nuclei −1 for GCE and HOPG, respectively. The scanning electron microscopy (SEM) images showed different nucleation and growth processes on GCE and HOPG substrates at same overpotential.

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Untitled

Cited by 56 publications

References 19 publications

Electrodeposition of Cobalt Rich Zn-Co alloy Coatings from Citrate Bath

Electrodeposition of Cobalt Rich Zn-Co alloy Coatings from Citrate Bath

Effects of thiourea and urea on zinc–cobalt electrodeposition under continuous current

Electrochemical study about zinc electrodeposition onto GCE and HOPG substrates

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