Electrodeposition of Zn–Ni alloys from sulfate bath

Abou–Krisha, Mortaga M.; Assaf, F. H.; Toghan, Arafat

doi:10.1007/s10008-006-0099-x

Cited by 44 publications

(27 citation statements)

References 28 publications

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“…Development of these brighteners for non-cyanide acid sulphate solution is continuously taking place even though few efficient commercial brighteners are available (Arthoba Naik et al 2001;Kariyanna et al 2003Kariyanna et al , 2004aAbou-Krisha et al 2005;Kariyanna and Venkatesha 2005). It is evident from the available literature that the single addition agent generally does not produce good deposit over a wide current density range.…”

Section: Introductionmentioning

confidence: 98%

“…It is evident from the available literature that the single addition agent generally does not produce good deposit over a wide current density range. In order to get good deposit, two or more addition agents are required (Abou-Krisha et al 2005). The presence of many addition agents poses problems in determining their consumption during plating.…”

Section: Introductionmentioning

confidence: 99%

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Polynitroaniline as brightener for zinc-nickel alloy plating from non-cyanide sulphate bath

et al. 2007

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Electro-polymerization of orthonitroaniline was carried out on graphite electrode in hydrochloric acid medium. Zinc-nickel alloy deposition was carried out in the presence of polynitroaniline in acid sulphate bath. The bath constituent and bath variables were optimized through Hull cell experiments. The current efficiency and throwing power were measured. High shift of potential towards more cathodic direction was observed in presence of addition agent. Corrosion resistance test revealed good protection of base metal by zinc-nickel coating obtained from the developed electrolyte. SEM photomicrograph shows fine-grained deposit in the presence of addition agent. The consumption of brightener in the lab-scale was 0⋅01 gL -1 for 1000 amp-h.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Polynitroaniline as brightener for zinc-nickel alloy plating from non-cyanide sulphate bath

et al. 2007

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“…Besides, by increasing of cobalt concentration in the electrolyte from 0.005 to 0.01 M, one anodic peak is only observed, that is an indication of solid solution of cobalt in zinc. In the electrolyte containing 0.02 M cobalt, a small anodic peak at potential of about -880 mV versus SCE is also observed that can be an indication of the formation of an intermetallic phase [8,29,33]. Figure 3 shows cyclic voltammograms obtained from the electrolyte containing 0.005 M CoSO 4 , 0.4 M ZnSO 4 , and 2 M glycine at three different scan rates of 5, 10, and 15 mV s -1 .…”

Section: Resultsmentioning

confidence: 85%

“…reduction. Many researches [8,[29][30][31][32] have attributed this behavior to the underpotential deposition (UPD) of zinc on cobalt. A peak at potential -1070 mV versus SCE is located on the anodic part of the Zn-Co cyclic voltmmogram that shows oxidation and dissolution of the deposited alloy.…”

Section: Resultsmentioning

confidence: 98%

“…The potential of this peak is more positive than the dissolution potential of pure zinc and also the height of this peak (current peak) is smaller than the height of dissolution peak of pure zinc. It is therefore concluded that the main constituent of electrodeposited Zn-Co alloy is zinc with a small fraction of cobalt [2,8]. Figure 2 shows cyclic voltammograms of the specimen exposed to electrolyte containing 2 M glycine ?…”

Section: Resultsmentioning

confidence: 98%

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Electrochemical studies of zinc–cobalt alloy coatings deposited from alkaline baths containing glycine as complexing agent

Gharahcheshmeh

Sohi

2010

J Appl Electrochem

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Co-deposition of Zn-Co alloy coatings that were electrodeposited from weakly alkaline glycine solutions has been studied by cyclic voltammetry. Scanning electron microscopy (SEM), energy depressive spectroscopy (EDS), and X-ray diffraction (XRD) analyses were used to study surface morphology, chemical composition, and phase structure of the coatings. Corrosion behavior of the coatings was also studied using potentiodynamic polarization tests in 3.5 wt% NaCl solution. Cyclic voltammetry results showed that in Zn-Co deposition from an alkaline bath in the presence of glycine, cobalt deposited at a potential near to that of zinc together with successful co-deposition of Co and Zn. It was also shown that reduction-oxidation (redox) reactions of Zn-Co alloy deposits were quasi-reversible and resulted in deviation of electrodeposited alloys from the equilibrium phase diagrams. The corrosion resistance of the deposits was also highly influenced by the composition and morphology of the coatings. Overall, Zn-Co deposit containing 0.89 wt% Co showed that the highest corrosion resistance among the coatings that was due to its single phase structure and fine morphology.

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Recovery of Zn(II) and Ni(II) Binary from Wastewater Using Integrated Biosorption and Electrodeposition

Booran

Doan

Lohi

2014

CLEAN Soil Air Water

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Research Article Recovery of Zn(II) and Ni(II) Binary from Wastewater Using Integrated Biosorption and ElectrodepositionThe present study aimed to obtain best operational conditions for biosorption of Zn(II) and Ni(II) binary metal solution in a fixed bed packed with wheat straw as biosorbent. The effects of bed depths, liquid flow rates and mixture metal concentrations on biosorption service time were investigated. The results showed that breakthrough service time of the biosorption columns (C b ¼ 2 mg/L Zn and Ni) increased with increasing bed depth, while decreased with increasing influent concentrations and flow rates, as expected. This paper further extended the study to investigate the competition of Zn(II) and Ni(II) binary in solution by performing biosorption tests at varied ratio of the metal concentrations. For biomass regeneration, the effect of desorbing agents (hydrochloric acid, nitric acid and sulphuric acid), their concentrations (0.1-0.5 mol/L) and flow rates (0.05-0.1 L/min) on recovery of Zn(II) and Ni(II) binary mixture was investigated. The best performance in desorption of Zn(II) and Ni(II) binary solutions were 0.1 mol/L H 2 SO 4 and a 0.05 L/min inlet flow rate. Moreover, after five sorption/desorption cycles, the biosorbent still maintained its high adsorption capability. Electrodeposition was also used to recover metal ions from concentrated Zn (II) and Ni(II) binary solutions (about 340 mg/L) from the desorption step. It was found that the electrodeposition could reduce the metal concentrations down to wastewater discharge limit of 2 mg/L Zn and Ni ions.

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Electrodeposition of Zn–Ni alloys from sulfate bath

Cited by 44 publications

References 28 publications

Polynitroaniline as brightener for zinc-nickel alloy plating from non-cyanide sulphate bath

Polynitroaniline as brightener for zinc-nickel alloy plating from non-cyanide sulphate bath

Electrochemical studies of zinc–cobalt alloy coatings deposited from alkaline baths containing glycine as complexing agent

Recovery of Zn(II) and Ni(II) Binary from Wastewater Using Integrated Biosorption and Electrodeposition

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