Stripping of Zn–Ni alloys deposited in acetate-chloride electrolyte under potentiodynamic and galvanostatic conditions

Petrauskas, А. V.; Grincevičienė, L.; Češūnienė, A.; Matulionis, E.

doi:10.1016/j.surfcoat.2004.08.191

Cited by 21 publications

(23 citation statements)

References 15 publications

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“…4a that ZnNi deposits obtained from solutions without (1) or with 0.52 M glycerol (7) show an increase of~5.5 wt% Ni tõ 19.5 wt% Ni in the deposits, as E d becomes more negative, from −1.26 V to −1.55 V. These results corroborate the voltammetric deposition curves, (Fig. 3b), i.e., these curves were similar and those obtained by Petraukas et al [10] and Pushpavanam and Balakrisnan [31], who report that the content of Ni in the ZnNi deposits obtained from ZnNi solutions with H 3 BO 3 increases with increasing polarization. Also, it was reported that ZnNi baths: without H 3 BO 3 [25]; with H 3 BO 3 -citrate [9] or ammoniacal solutions with and without H 3 BO 3 [2] showed the opposite behavior, i.e., Ni wt% in the ZnNi alloy decreased as the E d became more negative.…”

Section: Analysis Of the Znni Alloy Composition And Currentsupporting

confidence: 88%

“…According to some authors [8] the δ (Zn 22 Ni 3 ) and β (ZnNi) phases are only observed when obtained by a metallurgical method. However, some research has demonstrated that δ and β phases can be observed in electrodeposited ZnNi alloy [9,10].…”

Section: Introductionmentioning

confidence: 99%

“…The acid plating baths are based on solutions of chloride [2,5,8,10,[12][13][14][15][16][17][18][19][20][21][22][23][24] or sulfate salts [3,9,[25][26][27][28], or both [29,30]. These baths may contain electrolytes such as ammonium chloride or sulfate [8,12,16,24,27,28], boric acid [2,3,9,10,14,15,17,19,21,23,30,31], sodium [9,17] or potassium chloride [10,13,15,23,24], sodium acetate [10,…”

Section: Introductionmentioning

confidence: 99%

“…These baths may contain electrolytes such as ammonium chloride or sulfate [8,12,16,24,27,28], boric acid [2,3,9,10,14,15,17,19,21,23,30,31], sodium [9,17] or potassium chloride [10,13,15,23,24], sodium acetate [10,28], sodium citrate [3,9,27], etc.…”

Section: Introductionmentioning

confidence: 99%

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ZnNi alloy electrodeposition from acid baths containing sorbitol or glycerol and characterization of ZnNi deposits

2009

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The influence of sorbitol or glycerol on the electrodeposition of ZnNi alloys and on the morphology, composition and structure of the ZnNi deposits was investigated. The highest current efficiency (CE), around 90%, was obtained in the presence of glycerol in the potential range from approximately −1.30 V to −1.40 V, while in the presence of sorbitol or absence of either polyalcohol the CE was 82-85%, for the same potential range. Scanning electron microscopy (SEM) analysis showed that ZnNi deposition at −1.26 V or −1.40 V from a bath with sorbitol led to the formation of more compact deposits than with glycerol. Energy dispersive X-ray spectroscopy (EDS) analysis showed that the Ni content in the deposit obtained in the presence of sorbitol remained in the range of 7-9.5 wt% Ni, over a large range of deposition conditions. On the other hand, ZnNi deposits with variable Ni content (5.5-19.5 wt% Ni) were obtained from baths with glycerol or without either polyalcohol, by shifting the deposition potential. All ZnNi deposits showed uniform distribution of the elements Zn and Ni. X-ray analysis of ZnNi deposits obtained from plating baths with and without polyalcohol's at −1.26 and −1.40 V presented the γ, γ 1 and Pt 3 -Zn phases.

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Section: Analysis Of the Znni Alloy Composition And Currentsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

ZnNi alloy electrodeposition from acid baths containing sorbitol or glycerol and characterization of ZnNi deposits

2009

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“…The dissolution potential of the presumed porous nickel, as formed by prior dezincification, was significantly lower than that of the electrodeposited nickel. Recently, Petrauskas et al 10,11) identified dissolution of (NiZn) at the potentials previously assigned to the dissolution of porous nickel. Therefore, it is required that more investigations are performed to clarify the dissolution behavior of Ni-Zn alloys in different electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Deposition of Nanocrystalline Zinc-Nickel Alloys by D.C. Plating in Additive Free Chloride Bath

et al. 2007

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Nanocrystalline zinc-nickel alloy coatings were electro-deposited in chloride bath containing ZnCl 2 (50-200 gL À1 ), NiCl 2 .6H 2 O (50-200 gL À1 ) and H 3 BO 3 (40 gL À1 ) at 45 C. The initial alloy composition, as investigated by voltammetry, chronopotentiometry or EDX analysis, exhibited a pronounced dependence on the composition of plating bath. However, the alloy composition tended to approach an upper limit of 18 atomic percent when deposits grew thicker, for most of the plating bath compositions. The process was clearly the anomalous codeposition, which was considered to be due to the formation of an adsorbed layer of Zn(OH) 2 containing nickel cations, as an intermediate product, whose composition determines the composition of the electro-deposited alloy. The electro-deposited coatings comprised of single-phase structure of -phase (Ni 5 Zn 21 ) for about 12-18 atomic percent nickel and a mixture of -and -phases (hcp) for nickel atom percent below 8. The grain size decreased from about 50 nm to 20 nm with decrease in nickel content away from the stoichiometric composition of Ni 5 Zn 21 along with a decrease in hardness from about 450KHN to 150KHN. The decrease in hardness with a decrease in grain size seems attributable to the grain boundary sliding as predominant deformation mechanism. Anodic dissolution of the alloys involved pronounced dezincification, forming -phase (fcc) that dissolved at the end.

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Quantitative Analysis of Chemical and Phase Composition of Zn−Ni Alloy Coating by Potentiodynamic Stripping

Maizelis

Kolupaieva

2020

Electroanalysis

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We propose quantitative analysis of chemical and phase composition of Zn−Ni alloy depending on the film thickness, using potentiodynamic stripping in an alkaline ammonia‐glycinate electrolyte. The mechanism of dissolution of zinc‐enriched Zn−Ni alloy films in this electrolyte comprises sequential stages of dissolution of zinc‐phase and zinc from a γ‐phase of various structures, followed by dissolution of the nickel‐enriched residue, formed by dezincification, and matrix nickel.

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Stripping of Zn–Ni alloys deposited in acetate-chloride electrolyte under potentiodynamic and galvanostatic conditions

Cited by 21 publications

References 15 publications

ZnNi alloy electrodeposition from acid baths containing sorbitol or glycerol and characterization of ZnNi deposits

ZnNi alloy electrodeposition from acid baths containing sorbitol or glycerol and characterization of ZnNi deposits

Deposition of Nanocrystalline Zinc-Nickel Alloys by D.C. Plating in Additive Free Chloride Bath

Quantitative Analysis of Chemical and Phase Composition of Zn−Ni Alloy Coating by Potentiodynamic Stripping

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