Journal of Applied Electrochemistry

, Volume 34, Issue 2, pp 175–179 | Cite as

Electrochemically deposited Ni + WC composite coatings obtained under constant and pulsating current regimes

  • B. Jugović
  • J. Stevanović
  • M. Maksimović
Article

Abstract

A series of Ni + WC composite coatings were obtained by electrodeposition on a rotating disc electrode (RDE) from a commercially available Watts bath containing additives for brightness and smoothing and insoluble WC particles, using either constant or pulsating current. It was shown that the amount of WC embedded in the coating could vary from a few percent to over 80% depending on the rotation rate and the current density of deposition. Higher amounts (over 50 mass%) of embedded WC particles could be obtained only at rotation rates higher than 2000 rpm. It was also shown that the concentration of insoluble WC particles in the Watts bath has no significant influence on the amount of WC embedded in the coating, enabling the use of dilute mixtures (2 mass% of WC in the solution). At higher amounts of embedded WC particles, rough deposits were obtained with the WC particles being mostly incorporated in agglomerates of different sizes (from about 50 μm to about 100 μm). It was also shown that under the same conditions of electrodeposition, higher amounts of embedded WC particles could be obtained from solutions containing smaller particles.

composite constant and pulsating current regimes electrodeposition Ni + WC RDE 

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Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • B. Jugović
    • 1
  • J. Stevanović
    • 2
  • M. Maksimović
    • 3
  1. 1.Institute of Technical Sciences of the Serbian Academy of Science and ArtsBelgradeSerbia and Montenegro
  2. 2.Technology and MetallurgyInstitute of Electrochemistry – Institute of ChemistryBelgrade, Serbia and Montenegro
  3. 3.Faculty of Technology and MetallurgyUniversity of BelgradeBelgradeSerbia and Montenegro; fax: +381-11-3370387

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