Study of the electrochemical co-reduction of Cu2+ and Zn2+ ions from an alkaline non-cyanide solution containing glycine

Ballesteros, J.C.; Torres-Martı́nez, Leticia M.; Juárez-Ramírez, Isaías; Trejo, G.; Meas, Y.

doi:10.1016/j.jelechem.2014.04.020

Cited by 33 publications

(26 citation statements)

References 27 publications

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“…The CE previously reported [5,16,23,24] were very different from those obtained herein and this may be due to different working electrodes used in these works. As the chemical compositions of these electrodes were different of the 1010 steel electrode used in the present work, the hydrogen evolution and Cu(II) complexes and zincate deposition overpotentials were different.…”

Section: Current Efficiencies and Color Of Cu-zn Electrodepositscontrasting

confidence: 80%

“…Defilippo et al [16] report that the CE, obtained from Cu-Zn tartrate alkaline bath with current densities ranging between −50 and −160 mA cm −2 the average cathodic efficiency at 40 • C is estimated to be 52%. Ballesteros et al [23] from glycine containing baths pH 10 report an increase in CE as high is the [Zn 2+ ]/[Cu 2+ ] in solution, reaching 79% by cyclic voltammetry. Survila et al [24] found CE from 80-100% in a broad range of potentials for neutral electrodeposition solutions containing gluconate.…”

Section: Current Efficiencies and Color Of Cu-zn Electrodepositsmentioning

confidence: 98%

“…Several authors investigated Cu-Zn electrodeposition from cyanide [1][2][3][4] and non-cyanide baths [1,[5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24], in this last case due to environmental and health concerns. In our laboratory, free-cyanide alkaline Cu-Zn electrodeposition baths using the polyalcohol sorbitol [9] and EDTA [25] as alternative complexing agents have been developed.…”

Section: Introductionmentioning

confidence: 99%

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Copper–zinc electrodeposition in alkaline-sorbitol medium: Electrochemical studies and structural, morphological and chemical composition characterization

Almeida¹,

Barbano

Carvalho

et al. 2015

Applied Surface Science

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Section: Current Efficiencies and Color Of Cu-zn Electrodepositscontrasting

confidence: 80%

Section: Current Efficiencies and Color Of Cu-zn Electrodepositsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Copper–zinc electrodeposition in alkaline-sorbitol medium: Electrochemical studies and structural, morphological and chemical composition characterization

Almeida¹,

Barbano

Carvalho

et al. 2015

Applied Surface Science

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“…Further reduction continuing rapidly at around −1.3 V is due to the reduction of Cu + to solid Cu, associated with the reduction of solid Zn from Zn 2+ [45]. The same cyclic voltammograms were obtained from the solution containing zinc and copper electrolyte having a ligand [46]. Indeed, hydrogen evolution also occurs with co-deposition of the Zn-Cu alloy [43].…”

Section: Cyclic Voltammetry Analysismentioning

confidence: 88%

Structural and Corrosion Study of Uncoated and Zn-Cu Coated Magnesium-Based Alloy

Hacıibrahimoğlu

Bedır

Yavuz

2016

Metals

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Zn-Cu alloy was deposited onto AZ63 substrate, and the corrosion behaviour of resulting modified electrodes was investigated in 3 wt % NaCl solution in comparison with uncoated AZ63. Electrochemical, structural, and morphological study of the coating is presented. SEM images reveal that the surface morphology of the films is uniformly small spherical grain distributions. The XRD patterns illustrate polycrystalline structure and the formation of peaks corresponding to hexagonal close-packed ε-phase of Zn-Cu with various crystallographic orientations. Cyclic voltammetry was used to determine the potential ranges where the various redox processes occur. Linear sweep voltammetry results illustrate that longer exposure of uncoated AZ63 in NaCl solution produces a greater corrosion potential shift because of the formation of an oxide layer that did not prevent the progression of corrosion attack. The corrosion resistivity of Zn-Cu coated AZ63 is approximately two orders of magnitude greater than that of uncoated AZ63.

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“…Cyanide, however, has environmental and health concerns (Dash, 2009). Extensive research for less aggressive complexing agents is in course (Johannsen, 2001;Ballesteros, 2014;Survila, 2013). One example is sorbitol (de Almeida, 2015), in which the baths can give CuZn films fine-grained, uniform, smooth and with distinct colorations.…”

Section: Introductionmentioning

confidence: 99%

Reinforcement of CuZn coatings obtained by electrodeposition from a free-of-cyanide alkaline solution containing Al2O3 hard particles

Almeida¹,

Santos²,

Mahnud³

et al. 2016

Blucher Chemistry Proceedings

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An alkaline free-of-cyanide electrodeposition solution using sorbitol as complexing agent was employed for obtaining metal-matrix-composite coatings of CuZn-Al 2 O 3 . These coatings consisted of CuZn as metal matrix and hard micrometric alumina (Al 2 O 3 ) particles as the dispersed phase. These composite coatings could be employed in protection of metallic pieces subjected to erosion-corrosion, since they will combine corrosion resistance of the CuZn matrix and mechanical resistance given by the hard Al 2 O 3 particles. It is shown that these coatings could be obtained from the proposed solution, but only in high electrodeposition cathodic current densities (i g ), for ½i g ½> 15 mAcm -2 . Vickers microhardness (MH) of the composite coatings was significantly increased when comparing with pure CuZn coatings for i g . The increased microhardness is due to occluded Al 2 O 3 , since it was not observed grain refinement due to Al 2 O 3 . Based on these results, CuZn-Al 2 O 3 composite coatings have prospects for erosion-corrosion protection.

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Study of the electrochemical co-reduction of Cu2+ and Zn2+ ions from an alkaline non-cyanide solution containing glycine

Cited by 33 publications

References 27 publications

Copper–zinc electrodeposition in alkaline-sorbitol medium: Electrochemical studies and structural, morphological and chemical composition characterization

Copper–zinc electrodeposition in alkaline-sorbitol medium: Electrochemical studies and structural, morphological and chemical composition characterization

Structural and Corrosion Study of Uncoated and Zn-Cu Coated Magnesium-Based Alloy

Reinforcement of CuZn coatings obtained by electrodeposition from a free-of-cyanide alkaline solution containing Al2O3 hard particles

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