Electrodeposition of Cobalt Rich Zn-Co alloy Coatings from Citrate Bath

Garcia, J. R.; Lago, Dalva Cristina Baptista do; Senna, Lílian Ferreira de

doi:10.1590/s1516-14392014005000096

Cited by 19 publications

(16 citation statements)

References 40 publications

(82 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: 97%

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: 97%

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

et al. 2018

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“…There is also literature available that addresses Zn alloy deposited from citrate baths. Garcia et al plated Zn‐Co alloy films on carbon steel at 25 ο C from citrate‐added baths. The researchers found that the current density and a sodium citrate complexing agent influenced the deposition process of the Zn‐Co alloy.…”

Section: Introductionmentioning

confidence: 99%

“…To suppress the hydrogen deposition and stabilize the plating baths, alkalis and complexing agents (e.g., acetate and citrate) were added into the baths for ideal Zn, Zn‐Ni, and Zn‐Ni composite electroplating. According to the above results, the corrosion‐resistant properties such as uniformity, thickness, and the mechanical hardness of the plated films were also improved . To fill this gap in information, a research study was conducted to study Zn‐Ni alloy deposition in different operating conditions and levels.…”

Section: Introductionmentioning

confidence: 99%

Optimization of zinc‐nickel film electrodeposition for better corrosion resistant characteristics

et al. 2019

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Corrosion is one of the main causes of structural deterioration in offshore and marine structures. One way to mitigate the effect of corrosion is with Zn‐Ni electroplated coatings. An experimental design and optimization procedures for Zn‐Ni alloy electroplating was an explored. This study analyzed a five‐variable experimental plan comprised of four steps: (1) a two‐level fractional factorial design (FFD); (2) a response surface design the steepest ascent analysis; (3) a central composite design (CCD); and (4) a corrosion behaviour test to optimize the factors in Zn‐Ni deposition. The critical plating variables in step 1 were zinc/nickel molar concentration ratio, current density, citrate concentrations, plating temperature, and plating time, used to determine their influence on the polarization resistance and corrosion resistance. In steps 2 and 3 the significant variables were studied using the steepest ascent method and the central composite design (CCD) to find the most optimal conditions for zinc‐nickel electroplating. These conditions were found to be a Zn/Ni molar concentration ratio of 0.66, a plating temperature of 28 °C, an electroplating current density of 60 mA/cm2, an electroplating time of 13 min, and a citrate concentration of 0.062 mol/L. The corrosion behaviour test of step 4 showed that the films with a higher intensity of the γ‐NiZn3, γ‐Ni2Zn11, and γ‐Ni3Zn22 phases exhibited better corrosion resistance.

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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%

“…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 . 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 .…”

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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Electrodeposition of Cobalt Rich Zn-Co alloy Coatings from Citrate Bath

Abstract: Zn-Co alloy coatings were produced on carbon steel, at room temperature, from citrate baths

Cited by 19 publications

References 40 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

Optimization of zinc‐nickel film electrodeposition for better corrosion resistant characteristics

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

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