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Preparation of Zinc Powders by Acid Electrowinning
Russian Journal of Non-Ferrous Metals, 2019During the electrowinning of zinc in a mixture electrolyte of zinc sulfate and ammonium sulfate, the effects of current density, Zn2+ mass concentration and electrolytic additives on the morphology and current efficiency of Zn powders were evaluated. Finer Zn powders were obtained at high current density and low Zn2+ mass concentration.
null Rong Liang Zhang +5 more
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The Effect of Nickel in Zinc Electrowinning
Advanced Materials Research, 2011The effects of nickel ions on the cathode polarization process, kinetics equation and parameters in zinc electrowinning have been investigated in this paper. The results of the experiments show that when [Ni2+] ≤ 4 mg•L-1, the current density increases with increasing concentration of Ni2+ and limiting current of the passive point reach maximum, which ...
Gang Xie +3 more
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Journal of Physics: Conference Series
The influence of O2 bubbles on the flow field characteristics of the electrolyte in the zinc electrowinning process was comparatively investigated by coupling a laminar flow module or a laminar bubbly flow module to study the zinc electrowinning process ...
Mi Wang, Yi Meng, Jun Tie, Chun Li
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The influence of O2 bubbles on the flow field characteristics of the electrolyte in the zinc electrowinning process was comparatively investigated by coupling a laminar flow module or a laminar bubbly flow module to study the zinc electrowinning process ...
Mi Wang, Yi Meng, Jun Tie, Chun Li
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Journal of Materials Chemistry A, 2023
The CF/Ti/β-PbO2 composite was prepared for the first time by thermal decomposition and electrodeposition. Compared with the Pb–Ag anode, the current efficiency and service life of the CF/Ti/β-PbO2 anode increased by 14.92% and 232%, respectively.
Changyuan Hu +6 more
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The CF/Ti/β-PbO2 composite was prepared for the first time by thermal decomposition and electrodeposition. Compared with the Pb–Ag anode, the current efficiency and service life of the CF/Ti/β-PbO2 anode increased by 14.92% and 232%, respectively.
Changyuan Hu +6 more
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Zinc electrowinning with 2‐butyne‐1,4‐diol
The Canadian Journal of Chemical Engineering, 1987AbstractThe beneficial effect of 2‐butyne‐1,4‐diol on zinc current efficiency in the presence of nickel impurity has been examined. Several techniques including HPLC, absorption spectrophotometry and constant current deposition experiments have shown that a trimer of 2‐butyne‐1,4‐diol is responsible for the removal of Ni ions from the electrolyte, thus
D. L. Piron, D. Mathieu, M. D'Amboise
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The electrowinning of zinc from sodium hydroxide solutions
Hydrometallurgy, 2014Abstract Electrodeposition of zinc in the sodium hydroxide solutions on a stainless steel cathode was systematically investigated by means of cyclic voltammetry, chronoamperometry and chronopotentiometry in this paper. It was revealed that the deposition process was controlled by mass transport, and the diffusion coefficient of Zn(OH) 4 2 − ions ...
Zhang, Yucheng +4 more
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Investigations of new anodic materials for zinc electrowinning
Transactions of the IMF, 2009AbstractA new group of anodic materials and lead–silver alloys, produced in various ways, used as anodes for zinc electrowinning have been investigated. The new anodic materials are composite coatings, deposited on lead–calcium rolled substrates, consisting of a lead matrix and a cobalt–titanium phase.
T. Dobrev +3 more
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A laboratory-scale investigation of alkaline zinc electrowinning
Minerals Engineering, 2003Abstract The possibility of utilizing alkaline electrolysis technique in zinc electrowinning has been investigated. Effects of electrolysis conditions on the morphology of deposited zinc were also studied. The composition of the electrolyte was selected to be in accordance with the industrial practice, 25 g/l Zn 2+ and 240 g/l NaOH. The investigated
S. Gürmen, M. Emre
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Methanol Oxidation as Anode Reaction in Zinc Electrowinning
Journal of The Electrochemical Society, 2005In this study, different types of Pt- and PtRu-based electrodes were compared regarding their activity and stability for methanol oxidation in an acid zinc sulfate solution.
M. Wesselmark +2 more
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Influence of Co2+ ions on cathode behaviour during zinc electrowinning
Journal of Applied Electrochemistry, 1998The effect of Co2+ ions on zinc deposition from acidic sulfate electrolytes is investigated on the basis of steady-state polarization curves and impedance measurements. Hydrogen evolution is shown to be enhanced by adsorbed cobalt on both the zinc deposit and the aluminium substrate, and this stimulation occurs in combination with the catalytic effect ...
Dobrev, T. +2 more
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