Response surface modeling and voltammetric evaluation of Co-rich Cu–Co alloy coatings obtained from glycine baths

Lima, T.G. de; Rocha, Beatriz; Braga, A. V. C.; Lago, Dalva Cristina Baptista do; Luna, Aderval S.; Senna, Lílian Ferreira de

doi:10.1016/j.surfcoat.2015.06.008

Cited by 19 publications

(30 citation statements)

References 53 publications

(101 reference statements)

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“…This result can be related to the metallic oxide and hydroxides that were produced on the electrode surface during metal deposition process, due to the interface alkalization caused by the water and O 2 reduction reactions 41,42 . Table 2, in which the Co content in these coatings was about four times higher than the Ni content.…”

Section: Microstructural Characterization Of the Coatingsmentioning

confidence: 98%

The Effect of Electrolyte pH on the Ni-Co Mixed Oxides Coatings Produced from Citrate Baths

et al. 2018

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In this work, Ni-Co oxides coatings were produced using electrochemical techniques (chronopotentiometry and/or linear voltammetry) and solutions containing Ni 2+ and Co 2+ ions in the molar ratio 1: 2, sodium citrate as the ligand, and different pH values (7.5 and 10.5). Energy dispersive spectrometry (EDS), scanning electron microscopy (SEM), Raman spectroscopy (LRS) and electrochemical impedance spectroscopy (EIS) were used to characterize these coatings. The results showed that both pH values favored the production of Ni-Co oxide phases, independent of the electrochemical technique used. The EDS analysis indicated that it was possible to produce of oxides coating presenting different Ni:Co ratios using electrodeposition process. However, the morphology, the microstructure and the electrocatalytic ability of the coatings depended on both the pH and on the electrochemical technique used to produce them. The coatings produced using pH 10.5 were suitable to be used as electrocatalysts for the oxygen evolution reaction (OER).

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Section: Microstructural Characterization Of the Coatingsmentioning

confidence: 98%

The Effect of Electrolyte pH on the Ni-Co Mixed Oxides Coatings Produced from Citrate Baths

et al. 2018

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“…When deposited on silicon, copper or platinum substrates, these alloys can be used in sensor technology and data storage systems [1][2][3][4][5] . On the other hand, Cu-Co alloy coatings with high cobalt content and produced on other substrates can also find suitable applications, mainly for catalytic purposes 4,[6][7][8] and for anticorrosive coatings [7][8][9][10][11][12][13][14][15] .…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of Co-rich Cu-Co Alloys from Sodium Tartrate Baths Using Direct (DC) and Single Pulsed Current (SPC)

2019

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Cu-Co alloys were electrodeposited on steel substrates from alkaline sodium tartrate electrolyte using direct and single pulsed current (DC and SPC, respectively). The electrodeposition bath was composed by 0.02 mol L −1 of CuSO 4 .5H 2 O, 0.10 mol L −1 of CoSO 4 .7H 2 O and 0.50 mol L −1 of Na 2 C 4 H 4 O 6 .4H 2 O. Using both kind of deposition processes, it was verified that the applied current density (j) affected the cathodic current efficiency (E f ), the copper and cobalt contents in the coatings (wt. % Cu and wt. % Co, respectively), the morphology and the anticorrosive performance of the coatings (based on the transfer charge resistance, (R ct ) values). Comparing the results obtained for DC and SPC coatings, those produced by single pulsed current improved the E f values and decreased the grain sizes. Concerning the conditions used in this work, the coating produced under the conditions of Experiment 4', using j m = 40 A m -2 and SPC mode, presented 15.9 wt. % Co, the most compact morphology, the smallest grain size and the highest R ct value after 24 h of exposure in the saline medium.

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“…Therefore, there are several works concerning the use of alternative, environmentally-friendly electrolytic baths, that can be as efficient as cyanide ions in producing the metallic coatings 4,[6][7][8][9][10] . Among the environmentally friendly electrolytes currently used, citrates, gluconates, sulfamates, tartrates and glycinates are the most studied baths for the electrodeposition of copper alloy coatings 7,[11][12][13] . These compounds are non-toxic complexing agents, easily obtained and degraded 12,14,15 .…”

Section: Introductionmentioning

confidence: 99%

“…These compounds are non-toxic complexing agents, easily obtained and degraded 12,14,15 . Previous works have shown that it is possible to obtain bright and uniform Cu-Zn and Cu-Co alloys coatings using environmentally favorable citrate and glycinate baths 4,6,10,13,16 . The tartrate ion is an organic additive in the electrodeposition process of different metals and alloys, as have been reported in the literature 17,18 .…”

Section: Introductionmentioning

confidence: 99%

Cu-Sn Coatings Produced Using Environmentally Non-Aggressive Electrolyte Containing Sodium Tartrate

2017

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This work proposes the production of Cu-Sn alloy coatings with anticorrosive properties, using an environmentally non-aggressive bath. The coatings were electrodeposited on carbon steel substrate AISI 1020 using an electrolyte containing CuCl 2 and SnCl 2 , and sodium tartrate as the complexant agent. The produced coatings were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), inductively coupled plasma optical emission spectrometry (ICPOES) and electrochemical impedance spectroscopy (EIS). The film showing the highest corrosion resistance was obtained using j = 100 Am -2 . This coating was composed by 95.18 % m/m Cu and 4.83 % m/m Sn, and presented a uniform surface, without defects and small grain sizes. These characteristics probably contributed to the formation of Cu-Sn protective film onto steel substrate from a tartrate bath.

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Response surface modeling and voltammetric evaluation of Co-rich Cu–Co alloy coatings obtained from glycine baths

Cited by 19 publications

References 53 publications

The Effect of Electrolyte pH on the Ni-Co Mixed Oxides Coatings Produced from Citrate Baths

The Effect of Electrolyte pH on the Ni-Co Mixed Oxides Coatings Produced from Citrate Baths

Electrodeposition of Co-rich Cu-Co Alloys from Sodium Tartrate Baths Using Direct (DC) and Single Pulsed Current (SPC)

Cu-Sn Coatings Produced Using Environmentally Non-Aggressive Electrolyte Containing Sodium Tartrate

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