Cobalt/graphene electrodeposits: Characteristics, tribological behavior, and corrosion properties

Toosinezhad, Amirhosein; Alinezhadfar, Mohammad; Mahdavi, S.

doi:10.1016/j.surfcoat.2020.125418

Cited by 27 publications

(3 citation statements)

References 34 publications

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“…Hilder et al [24] have reported, for the first time, a new method for the synthesis of Zn/graphene nanocomposite film by one-step co-electrodeposition technique using cationic precursors, such as Zn 2+ ions. Subsequently, the preparation from aqueous electrolytes with cationic precursors of other metal/graphene composites with Ni [25], Cu [26], Co [27] or Sn [28,29] has been reported.…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of Tin-Reduced Graphene Oxide Composite from Deep Eutectic Solvents Based on Choline Chloride and Ethylene Glycol

Costovici

Pantazi

Balan

et al. 2023

Metals

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Some experimental results regarding the direct electrodeposition of tin-reduced graphene oxide composite (Sn-rGO) compared to the electrodeposition of tin metal (Sn) from a deep eutectic solvent (DES), namely using choline chloride-ethylene glycol eutectic mixtures, are presented. Raman spectroscopy demonstrated that GO is also reduced during the tin electrodeposition. Scanning electron microscopy (SEM) confirmed the presence of incorporated graphene related material in the composite film. X-ray diffraction patterns showed that the presence of rGO in the deposit diminished preferred orientation of Sn growth along the planes (101), (211), (301), and (112). The analysis of current-time transients involving Scharifker & Hills model has shown that Sn-rGO composite deposition process corresponds to a nucleation and tridimensional growth controlled by diffusion, with nucleation evolving from progressive to instantaneous upon increasing the overpotential. Diffusion coefficients at 25 °C of 9.4 × 10−7 cm2 s−1 for Sn(II) species in the absence and of 14.1 × 10−7 cm2 s−1 in the presence of GO, were determined. The corrosion performance has been assessed through the analysis of the recorded potentiodynamic polarization curves and of the electrochemical impedance spectra during continuous immersion in aerated 0.5 M NaCl aqueous solution at 25 °C for 144 h. A slight improvement of the corrosion performance in the case of the Sn-rGO composite coatings was noticed, as compared to pure Sn ones. Furthermore, the solderability performance has been evaluated. The solder joints showed a proper adhesion to the substrate with no fractures, and wetting angles around 44° have been determined, suggesting adequate solderability characteristics.

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Section: Introductionmentioning

confidence: 99%

Electrodeposition of Tin-Reduced Graphene Oxide Composite from Deep Eutectic Solvents Based on Choline Chloride and Ethylene Glycol

Costovici

Pantazi

Balan

et al. 2023

Metals

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“…Such relatively lower corrosion rate of ZnWG nanocomposite coatings than the ZnW nanocomposite coating is because of the integration of graphene into the ZnW matrix which produced corrosion-resistant layers across the film and also prevented corrosive ions from penetrating the substrate. 24 Minimum grain size and improved grain strength due to graphene tend to result in more significant grain boundaries, producing dislocation obstruction and displacement inhibition. This results in many dislocation pile-ups, which increases the corrosion resistance of the nanocomposite coating.…”

Section: Resultsmentioning

confidence: 99%

Investigation on tribological behaviour of co-deposited zinc, tungsten and graphene (ZnWG) nanocomposite coatings on low-carbon steel

Karthik,

Yoganandh,

Raveen

2023

Proceedings of the Institution of Mechanical Engineers, Part L:

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The protection of steel surfaces in industrial applications to improve their tribological behaviour using graphene-based nanocomposite coatings is a potential area for researchers to investigate. An attempt has been made to develop and compare the tribological properties of Zinc–tungsten (ZnW), Zinc–Tungsten with 0.25 wt.% of graphene (ZnWG 0.25 wt.%) and Zinc-Tungsten with 0.50 wt.% of graphene (ZnWG 0.50 wt.%) coatings on steel substrates with low-carbon content using the electroplating technique with pulse power supply. The electrolyte bath for pulsed electro-deposition was maintained as aqueous by involving zinc sulphate, sodium tungstate and citric acid. The experiments inferred that ZnWG 0.50 wt.% performed with better wear resistance due to its increased graphene content, contributing to the effective ductile load-bearing ability of the ZnW coating matrix. Grain size control and improved grain strength due to the presence of graphene in the ZnW matrix produced dislocation obstruction and displacement inhibition to create defect-free layered cauliflower morphology and contributed to ZnWG 0.50 wt.% exhibiting better corrosion resistance than the plain ZnW coating.

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“…The GO nanosheets dispersed in the composite coating change the morphology of the coating from a conical shape to a protruding structure, as well as refining crystalline size from 50 nm for pristine cobalt to 20 nm for a GO/cobalt nanocomposite [93]. The presence of graphene in the coating resulted in the reduction of the cobalt crystallite size, and the pyramidal morphology of the pure Co coating became smaller at low graphene concentrations and changed to a needle shape at the high concentrations [94]. Also, the incorporation of GO led to a refinement of the Zn crystallites in the coating matrix [95].…”

Section: Microstructure Of Graphene Containing Composite Coatingtablementioning

confidence: 99%

Graphene derivatives reinforced metal matrix nanocomposite coatings: A review

et al. 2022

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Due to the extraordinary mechanical, thermal, and electrical properties of graphene, graphene oxide (GO), and reduced graphene oxide (rGO), these materials have the potential to become ideal nanofillers in the electrodeposited nanocomposite coatings. This article provides an overview of literature on the improvements of properties associated with graphene, GO, and rGO-reinforced coatings, along with the processing parameters and mechanisms that would lead to these improvements in electrodeposited metal matrix nanocomposite coatings, where those affected the microstructural, mechanical, tribological, and anti-corrosion characteristics of coatings. The challenges associated with the electroplating of nanocomposite coatings are addressed. The results of this survey indicated that adding graphene into the plating bath led to a finer crystalline size in the composite coating due to increasing the potential development of specific crystalline planes and the number of heterogeneous nucleation sites. This consequently caused an improvement in hardness and in tribological properties of the electrodeposited coating. In graphene reinforced metallic composites, the severe adhesive wear mechanism for pure metallic coatings was replaced by abrasive wear and slight adhesive wear, where the formation of a tribolayer at the contact surface increased the wear resistance and decreased friction coefficient. Furthermore, superhydrophobicity and smaller grain size resulted from embedding graphene in the coating. It also provided a smaller cathode/anode surface ratio against localized corrosion, which has been found to be the main anti-corrosion mechanism for graphene/metal coating. Lastly, the study offers a discussion of the areas of research that need further attention to make these high-performance nanocomposite coatings more suitable for industrial applications.

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Cobalt/graphene electrodeposits: Characteristics, tribological behavior, and corrosion properties

Cited by 27 publications

References 34 publications

Electrodeposition of Tin-Reduced Graphene Oxide Composite from Deep Eutectic Solvents Based on Choline Chloride and Ethylene Glycol

Electrodeposition of Tin-Reduced Graphene Oxide Composite from Deep Eutectic Solvents Based on Choline Chloride and Ethylene Glycol

Investigation on tribological behaviour of co-deposited zinc, tungsten and graphene (ZnWG) nanocomposite coatings on low-carbon steel

Graphene derivatives reinforced metal matrix nanocomposite coatings: A review

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