Journal of Materials Science

, Volume 42, Issue 22, pp 9137–9144 | Cite as

Studies on electrodeposition and corrosion behaviour of a Ni–W–Co amorphous alloy

  • Renato Alexandre C. Santana
  • Ana Regina N. Campos
  • Emanuelle A. Medeiros
  • Aldrighi Luiz M. Oliveira
  • Liana Maria F. Silva
  • Shiva PrasadEmail author


A ternary alloy Ni–W–Co was electrodeposited and operational parameters in relation to its corrosion resistance and deposition efficiency were optimized. A 22 full factorial design was successfully employed for experimental design analysis of the results. By means of response surface analysis, the statistical model identified the following operating conditions for obtaining corrosion resistant alloy: 60 mA/cm2 current density, 70 °C temperature, 20 rpm cathode rotation and 8.0 pH. The alloy was deposited at 36% current efficiency, with an average composition of 70% Ni, 8% Co, 22% W and traces of boron and with Ecorr −0.508 V and Rp 4.56 × 10Ohm. The deposit obtained under these conditions had an amorphous character and showed good adherence, high corrosion resistance and presence of nodules on its surface. Electrochemical corrosion tests verified that the Ni–W–Co alloy had better corrosion resistance than similarly electrodeposited Co–W amorphous alloy.


Corrosion Resistance Response Surface Methodology Amorphous Alloy Current Efficiency Passive Film 



The authors are grateful to CNPq, CAPES and FINEP for financial assistance.


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Renato Alexandre C. Santana
    • 1
  • Ana Regina N. Campos
    • 1
  • Emanuelle A. Medeiros
    • 1
  • Aldrighi Luiz M. Oliveira
    • 1
  • Liana Maria F. Silva
    • 1
  • Shiva Prasad
    • 1
    Email author
  1. 1.Department of Chemical EngineeringUniversidade Federal de Campina GrandeCampina GrandeBrazil

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