Zinc electrodeposition from acetate solutions

Krishnan, R. M.; Kennedy, C.J.; Jayakrishnan, Sobha; Sriveeraraghavan, S.; Natarajan, S.; Ramamurthy, Chitteti; Anantharam, R.

doi:10.1016/0026-0576(96)85149-x

Cited by 6 publications

(4 citation statements)

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“…The pH of bath deposition also affects the quality of the deposit having been verified 12 a deposit burnt at pH lower than 2.5 while at pH 2.5 a satisfactory bright deposits were obtained to zinc electrodeposition from sulphate bath content product of glycyl-glycine and furfural. However, the powdery deposit was obtained at pH of 4 to zinc electrodeposition from acetate solution, while a smooth, uniform, and white deposit was obtained at pH of 5.0 13 . These results indicate that the effect of pH on the characteristics of the zinc deposit depends on the composition of the deposition bath.…”

Section: Introductionmentioning

confidence: 95%

“…The effect of the organic additives on the microstructure of the Zn deposit is related mainly com the formation of a more compact coating and more refined grains. This behavior is related to the adsorption of additives on the cathode surface during electrodeposition; the additives can retard grain growth and increase the nucleation rate, resulting in finer grain and compacts deposits [13][14][15][16][17]24 .…”

Section: Introductionmentioning

confidence: 99%

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Glycerol Effect on the Corrosion Resistance and Electrodeposition Conditions in a Zinc Electroplating Process

et al. 2019

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Zinc electrodeposition is an economical process of Zn coating compared to conventional galvanic process. The galvanizing process is used in various industrial sectors to protect ferrous alloys during the corrosion process. In buildings, the galvanizing process is widely used to coat mortar protective screens. The electrodeposition of zinc has a relatively low cost compared to other coating materials for the same purpose; however, its corrosion resistance is lower than that of most protective deposits. This study evaluated the effect of adding glycerol to the electrodeposition bath on the corrosion resistance, deposition efficiency, morphology and microstructure of the zinc electrodeposit in concentrations ranging from 0.03 to 0.82 M. The electrodeposition was performed on carbon steel AISI 1020 with a current density of 10 mA.cm-2. The electroplating solution composition was 0.10 M ZnCl 2 , 2.80 M KCl and 0.32 M H 3 BO 3. Electrodeposition time was 17.56 min, 5 µm thick coating, equivalent to the mass of 7.166E-3 g of zinc on the steel surface. Evaluation of the corrosion resistance was performed by means of the electrochemical tests of Anodic Voltammetry, Potentiodynamic Polarization and Electrochemical Impedance Spectroscopy (EIS) as well as Weight Loss tests in NaCl 0.5 M in 4 (four) different period of immersion. The morphology and microstructures of electrodeposited were analyzed using the techniques of Scanning Electron Microscopy (SEM) and Spectrometry X-Ray Diffraction (XRD). The presence of glycerol in the electrodeposition bath decreased the deposition efficiency; however, it increased corrosion resistance and promoted the formation of more compact and refined electrodeposited coatings. Moreover, the results showed that the corrosion rate does not vary linearly with the addition of glycerol.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Glycerol Effect on the Corrosion Resistance and Electrodeposition Conditions in a Zinc Electroplating Process

et al. 2019

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“…Polarization tests in de-aerated 5 wt % NaCl solutions were carried out to evaluate the corrosion behavior of the zinc coatings [48]. The dissolution mechanism normally involves the formation of insoluble oxides/hydroxides film [49], however, in presence of chlorides, this film does not influence the zinc dissolution because of its porous structure [50]. Considering the surface texture, the basal plane was expected to perform better against corrosion with respect to other surface orientations [51] together with a compact film morphology [48,52,53].…”

Section: Corrosion Characterizationmentioning

confidence: 99%

Zinc electrodeposition from a chloride-free non-aqueous solution based on ethylene glycol and acetate salts

Panzeri

Müller

Accogli

et al. 2019

Electrochimica Acta

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“…Prior research has been done to develop cyanide-free silver electroplating solution to replace alkaline cyanide solution. As a result, the most effective formulations were obtained with thiosulfate, [2][3][4] succinimide, [5][6][7] hydantoin derivatives [8][9][10][11][12] and uracil 13,14 as complexing agents. Asakawa et al 8 reported that a stable cyanidefree bath solution when hydantoin compound was present in the solution at a molar ratio three times that of silver.…”

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confidence: 99%

Electrodeposition of Silver in Cyanide-Free Solution Containing Pyrimidine Derivative as a Complexing Agent

Jasni,

Yoshihara

2023

J. Electrochem. Soc.

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Pyrimidine derivatives, for example, 2,4-pyrimidinedione (uracil), 1-methyluracil and 5-methyluracil (thymine) can bind with metal ions in alkaline solution. 5-methyluracil (thymine) as chelating agent in electroplating solution has not been investigated due to its low solubility in water. The aim of this study was to determine the potential of 5-methyluracil (thymine) as chelating agent for cyanide-free silver electroplating solution. The influence of chelating agent and polyethyleneimine on the silver electrodeposition reaction were studied. Electrochemical quartz crystal microbalance (EQCM) and electrochemical impedance spectroscopy were used to study the electrochemical behavior of cyanide-free silver electroplating solution. The surface morphology and brightness of silver deposits obtained from each cyanide-free silver electroplating solution were evaluated. A semi-bright deposit was obtained from thymine and uracil-complexing silver solution while matte deposit from 5,5-dimethylhydantoin-complexing silver solution. A bright silver deposit could be obtained in the presence of polyethyleneimine. The reduction current value decreases as the amount of polyethyleneimine added increases due to inhibition effect on the silver electrodeposition reaction. The EQCM measurement showed that the addition of polyethyleneimine in thymine-complexing silver solution does not significantly affect the resonance frequency change.

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Zinc electrodeposition from acetate solutions

Cited by 6 publications

References 1 publication

Glycerol Effect on the Corrosion Resistance and Electrodeposition Conditions in a Zinc Electroplating Process

Glycerol Effect on the Corrosion Resistance and Electrodeposition Conditions in a Zinc Electroplating Process

Zinc electrodeposition from a chloride-free non-aqueous solution based on ethylene glycol and acetate salts

Electrodeposition of Silver in Cyanide-Free Solution Containing Pyrimidine Derivative as a Complexing Agent

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