Effects of SiC and Al2O3 particles on the electrodeposition of Zn, Co and ZnCo. I. Electrodeposition in the absence of SiC and Al2O3

Tulio, Paulo Cezar; Carlos, I.A.

doi:10.1007/s10800-008-9670-8

Cited by 10 publications

(9 citation statements)

References 69 publications

(93 reference statements)

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“…The latter occurs on top of the initial bulk zinc deposit. These results corroborate those obtained by Tulio and Carlos [18] and Siqueira and Carlos [22]. Similar results were obtained at other mannitol concentrations.…”

Section: Methodssupporting

confidence: 92%

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Study of the influence of the polyalcohol mannitol on zinc electrodeposition from an alkaline bath

2010

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In this paper, the effects of adding mannitol to an alkaline plating bath on the electrodeposition of zinc onto AISI 1010 steel are described and assessed. From cyclic voltammograms with various lower-limit potentials, it is concluded that an initial zinc bulk deposition (region of wave c 0 ) occurs from -1.45 V in the negative sweep. When the sweep is reversed at -1.60 V, an anodic peak a 1 is seen in the positive sweep both in the absence and in presence of mannitol, which was assigned to zinc dissolution. This peak indicates that the primary nucleation and growth of zinc in region c 0 is followed by zinc secondary nucleation and growth (region of peak c 1 ). Scanning electron micrographs show that zinc electrodeposits obtained at mannitol concentrations C0.10 M were more refined than at lower concentrations. Energy-dispersive X-ray spectroscopy of these electrodeposits show oxygen contents that are generally low or below detection limit.

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Section: Methodssupporting

confidence: 92%

“…Tulio and Carlos [18] report that the steel electrode can form an iron oxide film before or during immersion of the electrode in the electrolytic solution, in both cases without electrode polarization. Thus, the curves in Fig.…”

Section: Methodsmentioning

confidence: 99%

Study of the influence of the polyalcohol mannitol on zinc electrodeposition from an alkaline bath

2010

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“…Figure 1a, b shows the effects of distinct C SiC and C Al 2 O 3 on the beginning of Zn electrodeposition. In accordance with [1], the peak c 0 , in the pre-bulk electrodeposition region, has contributions from Zn upd and the hydrogen evolution reaction from H 3 O ? reduction (HER).…”

Section: Methodssupporting

confidence: 63%

“…Current density (i)-potential (E) curves were obtained at a constant sweep rate (v) of 10 mV s -1 . Details of the experimental set-up for electrochemical measurements can be found elsewhere [1]. 4 Cl for ZnCo films.…”

Section: Methodsmentioning

confidence: 99%

“…In Part I of this study [1], the electrochemical features of Zn, Co and ZnCo electrodeposition on steel from particle-free acid sulfate solutions were investigated. In this Part II, SiC or Al 2 O 3 micro particles were added to the electrodeposition solutions and their effects on the electrodeposition processes and the ZnCo-SiC and ZnCoAl 2 O 3 deposits were assessed.…”

Section: Introductionmentioning

confidence: 99%

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Effect of SiC and Al2O3 particles on the electrodeposition of Zn, Co and ZnCo: II. Electrodeposition in the presence of SiC and Al2O3 and production of ZnCo–SiC and ZnCo–Al2O3 coatings

Tulio

Carlos

2009

J Appl Electrochem

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SiC or Al 2 O 3 microsized particles were added to acid sulfate-based solutions for the electrodeposition of Zn, Co, and ZnCo. Initially, their effects on the electrochemical processes were evaluated. The Zn electrodeposition rate was increased in both SiC and Al 2 O 3 -loaded solutions. The Co electrodeposition rate was also increased by SiC. However, Al 2 O 3 decreased it, especially at the beginning. Both SiC and Al 2 O 3 influenced the electrodeposition of ZnCo positively at moderate loadings. The factors involved in producing ZnCo-SiC and ZnCo-Al 2 O 3 composites were evaluated. ZnCo-SiC composites could be deposited with a higher [Co/Zn] ratio in the metal matrix than for pure ZnCo. In ZnCo-Al 2 O 3 , the [Co/Zn] ratio was smaller than in ZnCo and ZnCo-SiC. It was necessary to reduce the CoSO 4 concentration to improve the Al 2 O 3 co-deposition. The variation in [Co/Zn] ratio could, in principle, be related to the effects of SiC and Al 2 O 3 on the individual Zn and Co electrodeposition.

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Study of the influence of a boric–sorbitol complex on Zn–Mn electrodeposition and on the morphology, chemical composition, and structure of the deposits

2011

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Zn-Mn electrodeposition onto Pt from an electrolyte containing boric-sorbitol complex (BSC) or boric acid alone (BA) was studied. The influence of BA or BSC content on the deposition process was investigated by cyclic voltammetry and electrodeposits, produced potentiostatically, were analysed by SEM, EDX, and XRD. The voltammetric studies indicated that an increase in the BSC concentration led to a decrease in the deposition current density. EDX analysis of deposits obtained at -1.60 V showed that increasing the BA or BSC concentration in the bath induced a fall in the Mn content of the electrodeposit and that for BSC this decrease was more significant. SEM images showed that the Zn-Mn electrodeposit obtained in the presence of 0.24 M BSC were smoother than other deposits; hence, BSC acted as a grain refiner at this concentration. XRD analysis of this deposit indicated that it was composed of Zn, Mn, MnZn 13 , and MnH 0.8 .

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Effects of SiC and Al2O3 particles on the electrodeposition of Zn, Co and ZnCo. I. Electrodeposition in the absence of SiC and Al2O3

Cited by 10 publications

References 69 publications

Study of the influence of the polyalcohol mannitol on zinc electrodeposition from an alkaline bath

Study of the influence of the polyalcohol mannitol on zinc electrodeposition from an alkaline bath

Effect of SiC and Al2O3 particles on the electrodeposition of Zn, Co and ZnCo: II. Electrodeposition in the presence of SiC and Al2O3 and production of ZnCo–SiC and ZnCo–Al2O3 coatings

Study of the influence of a boric–sorbitol complex on Zn–Mn electrodeposition and on the morphology, chemical composition, and structure of the deposits

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