Study of phase composition of Zn–Ni alloy electrodeposited in acetate–chloride electrolyte at a temperature of 50°C

Petrauskas, А. V.; Grincevičienė, L.; Češūnienė, A.; Juškėnas, Remigijus

doi:10.1016/j.electacta.2005.11.040

Cited by 17 publications

(11 citation statements)

References 20 publications

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“…At E k2 = -1.52 and E k1 = -1.48 V versus SCE, three anodic peaks are observed due to the absence of d-phase. When E k [ -1.48 V versus SCE, zinc metal is preferentially deposited with respect to nickel, as would be expected for a process involving anomalous co-deposition of Zn-Ni alloy [24][25][26].…”

Section: Switching Potentials (E K )mentioning

confidence: 89%

Electrochemical studies of Zn–Ni alloy coatings from acid chloride bath

Basavanna

Naik

2009

J Appl Electrochem

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The electrodeposition of Zn-Ni alloy from chloride bath was carried out in presence of condensation product (CP) formed between vanillin and hexamine. The investigation of electrodeposition and nucleation process was carried out on glassy carbon electrode using cyclic voltammetric and chronoamperometric techniques. During the anodic scan of cyclic voltammetry, three anodic peaks were observed corresponding to the dissolution of zinc and nickel from different phases of Zn-Ni alloy. The model of Scharifker and Hills was used to analyze the current transients and it revealed that Zn-Ni electrocrystallization process in the presence of CP, under the studied conditions, is governed by three-dimensional nucleation process controlled by diffusion. In presence of CP, the results indicated that nucleation process changes from progressive to instantaneous when the deposition potential becomes more negative. The phase structure and surface morphology of the deposits were characterized by means of X-ray diffraction analysis and Scanning electron microscopy, respectively.

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Section: Switching Potentials (E K )mentioning

confidence: 89%

Electrochemical studies of Zn–Ni alloy coatings from acid chloride bath

Basavanna

Naik

2009

J Appl Electrochem

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“…Entre as fases observadas na literatura, a fase γ destaca-se como uma das fases presentes na maioria dos experimentos envolvendo eletrodeposição, seguida das fases como δ e α, que aparecem nos revestimentos com frequência menor em comparação a fase γ. As fases menos observadas são a β e η [3][4][5][6][7][8]. As características morfológicas dos depósitos de ligas Zn-Ni são dependentes das variáveis do processo de eletrodeposição, do tipo de solução eletrolítica, técnica utilizada na eletrodeposição, característica do substrato, geometria da célula eletroquímica e eletrodos, entre outros parâmetros [3,7,9].…”

Section: Revestimento De Zn-ni Por Eletrodeposiçãounclassified

EFEITO DE COMPOSTOS ORGÂNICOS NA ELETRODEPOSIÇÃO DE LIGAS Zn-Ni SOBRE AÇO

Oliveira¹,

Bertagnolli²,

Silva³

et al. 2018

ABM Proceedings

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Resumo Compostos orgânicos adicionados em soluções eletrolíticas podem influenciar na eficiência do eletrodepósito, no aspecto visual do material, nas fases formadas, na topografia e na dureza do revestimento. Para analisar esses parâmetros, um aço baixo carbono foi revestido com ligas Zn-Ni, a partir de três banhos distintos contendo os seguintes compostos orgânicos, além de outros reagentes: sacarina, trietilamina e ácido p-toluenossulfônico, a fim de compará-los entre si e com o banho sem composto orgânico. Para isso, utilizou-se microscópio eletrônico de varredura, espectroscopia de dispersão de raios-x e microscópio óptico confocal para análise da superfície, além de ultra-microdurômetro para determinação da dureza dinâmica do revestimento. Os resultados mostraram que os compostos orgânicos alteraram as características do depósito. Conclui-se que ocorreram alterações na eficiência catódica, na porcentagem dos elementos de Zn e Ni no revestimento, nas características de rugosidade, porosidade e dureza. Palavras-chave: Eletrodeposição; Ligas Zn-Ni; Componentes orgânicos. EFFECT OF ORGANIC COMPOUNDS IN THE ELECTRODEPOSITION OF Zn-Ni ALLOYS ON STEEL Abstract Organic compounds added in electrolyte solutions can influence the deposit efficiency, the visual aspect of the material, the phase formation, topography and the coating hardness. Order to examine these parameters, low carbon steel was coated with Zn-Ni alloy from three separate baths containing the following organic compounds, and other reagents: saccharin, triethylamine and p-toluenesulfonic acid in order to compare them with each other and with the bath without organic compound. For this, was used a scanning electron microscope, energy dispersive x-ray and optical confocal microscope for surface analysis, ultra-microhardness tester to determine the dynamic hardness of the coating. The results showed that the organic compounds have altered characteristics of the deposit. It observed changes in the cathodic efficiency, in the percentage of the elements Zn and Ni in the coating, in the roughness, porosity and hardness characteristics.

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“…The mechanism of electrolytic Zn-Ni alloy deposition has been thoroughly investigated in sulphate [1,2], chloride [3,11,12,18], and sulphate-chloride plating solutions and only a few reports are available for acetate-sulphate and acetate-cloride plating solutions [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Influence of voltammetric parameters on Zn–Ni alloy deposition under potentiodynamic conditions

Petrauskas¹,

Grincevičienė²,

Češūnienė³

2009

J Appl Electrochem

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The phase composition of Zn-Ni alloys electrodeposited from acetate-chloride plating solutions containing Zn ?2 and Ni ?2 ions at ratio of 1-12.8 at 50°C was investigated by the potentiodynamic stripping method. Two anodic current density (i a ) peaks emerged in potentiodynamic stripping curves (PDC) at E \ 0.0 V and E [ 0.0 V (vs. Ag/AgCl/KCl sat ), that were attributed to oxidation of certain phases of the Zn-Ni alloy. The ratio of these phases in deposited Zn-Ni alloys under potentiodynamic conditions was affected by the potential sweep rate (m) and maximum cathodic current density (i c ) The ratio of Zn and Ni in certain phases of Zn-Ni alloy was determined by the partial potentiodynamic stripping technique. Experimental data show that Zn-Ni alloy, containing 6.5 at.% Zn and 93.5 at.% Ni and dissolved in i a peak H (E [ 0.0 V), provides the black coloration of the Zn-Ni alloy.

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Study of phase composition of Zn–Ni alloy electrodeposited in acetate–chloride electrolyte at a temperature of 50°C

Cited by 17 publications

References 20 publications

Electrochemical studies of Zn–Ni alloy coatings from acid chloride bath

Electrochemical studies of Zn–Ni alloy coatings from acid chloride bath

EFEITO DE COMPOSTOS ORGÂNICOS NA ELETRODEPOSIÇÃO DE LIGAS Zn-Ni SOBRE AÇO

Influence of voltammetric parameters on Zn–Ni alloy deposition under potentiodynamic conditions

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