Ni–Co alloys plated by pulse currents

Tury, B.; Lakatos‐Varsányi, M.; Roy, Sudipta

doi:10.1016/j.surfcoat.2005.10.008

Cited by 75 publications

(37 citation statements)

References 13 publications

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“…Thus, the grain size is reduced with increasing cobalt content. Similar observation was reported by Tury et al 55 for deposition of Ni-Co alloys by pulsed current.…”

Section: Microhardnesssupporting

confidence: 90%

Nanocrystalline Ni–Co alloy coatings: electrodeposition using horizontal electrodes and corrosion resistance

Bakhit

Akbari

2012

J Coat Technol Res

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Nanocrystalline Ni-Co alloy coatings containing 0-45 wt% Co were electrodeposited using horizontal electrodes in a modified Watts bath. Different techniques including scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, microindentation, and potentiodynamic polarization were used to characterize the alloy coatings. Properties of the alloy coatings were investigated as a function of the cobalt ion concentration (Co 2+ ) in the bath. It was observed that the alloy codeposition exhibits anomalous behavior. Co content in the alloy coatings increases with increasing Co 2+ in the bath and with electrolyte agitation. Morphology and grain size of alloy coatings are greatly affected by Co content. By increasing Co content, surface morphology of the alloy coatings changes from pyramidal to spherical. Microhardness of the alloy coatings increases with increasing Co content mainly due to decreasing grain size that follows the Hall-Petch relation. In addition, Ni-17 wt% Co alloy exhibits better corrosion resistance compared to pure Ni and other Ni-Co alloy coatings. The higher corrosion resistance of Ni-17 wt% Co coating is discussed based on its phase structure, grain size, and preferred orientation.

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“…Thus, the grain size is reduced with increasing cobalt content. Similar observation was reported by Tury et al 55 for deposition of Ni-Co alloys by pulsed current.…”

Section: Microhardnesssupporting

confidence: 90%

Nanocrystalline Ni–Co alloy coatings: electrodeposition using horizontal electrodes and corrosion resistance

Bakhit

Akbari

2012

J Coat Technol Res

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“…As compared to pure nickel, Ni-Co alloy possesses good adhesion, high strength, good wear resistance, corrosion resistance, thermal stability, heat-conductive, electrocatalytic activity, and excellent magnetic properties [1][2][3][4][10][11][12][13]. For example, Wang et al [1] reported superplasticity (a maximum elongation of 279% at a temperature of 773 K) of an electrodeposited nanocrystalline Ni-Co alloy with an average grain size of 20 nm.…”

Section: Introductionmentioning

confidence: 99%

Effects of peak current density on the mechanical properties of nanocrystalline Ni–Co alloys produced by pulse electrodeposition

Jiang

Huang

et al. 2008

Applied Surface Science

118

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“…Pulse plating technology [5][6][7][8] applies square wave signals varying the pulse parameters on time, off-time and pulse current density / or pulse electrode potentials (Figure 1). The control of electrode potentials requires experimental setup of electrochemical cell with three electrodes.…”

Section: Kinetics and Mechanism Of Electrodepositionmentioning

confidence: 99%

Electrochemistry in nanotechnology

Lakatos‐Varsányi¹

2016

Int. J. Corros. Scale Inhib.

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Corrosion results in short-or long-term deterioration of materials. All over the world, researchers and engineers try to find better and better resolution to inhibit these undesired processes. One of the very efficient techniques, when the metal surface is covered by nanolayers, that can control the corrosion, is the deposition of solids by metal layers with predefined characteristics (composition, thickness, etc.) Among the many electrochemical processes, we have applied the non-stationary electrochemical method, named pulse current electrochemical deposition (PC-technique) for nanostructured thin layers deposition. Applying a current interruption method, we produced pure metal and alloy coatings with various compositions and layer thickness developed from aqueous solutions, at ambient temperature. The exceptional advantage of pure metal coatings produced by PC technique is the pore free, nano-sized structure. All technical details are summarized in this paper and the anticorrosion efficiency of the nanocoatings is demonstrated, too.

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Ni–Co alloys plated by pulse currents

Cited by 75 publications

References 13 publications

Nanocrystalline Ni–Co alloy coatings: electrodeposition using horizontal electrodes and corrosion resistance

Nanocrystalline Ni–Co alloy coatings: electrodeposition using horizontal electrodes and corrosion resistance

Effects of peak current density on the mechanical properties of nanocrystalline Ni–Co alloys produced by pulse electrodeposition

Electrochemistry in nanotechnology

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