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Journal of Thermal Spray Technology

, Volume 14, Issue 3, pp 335–341 | Cite as

High-velocity oxyfuel Cr3C2-NiCr replacing hard chromium coatings

  • J. M. Guilemany
  • N. Espallargas
  • J. Fernández
  • P. H. Suegama
  • A. V. Benedetti
Reviewed Papers

Abstract

Comparative wear and corrosion properties of Cr3C2-NiCr (CC-TS) (a high-velocity oxyfuel [HVOF]) and hard chromium (HC) coatings obtained on a steel substrate have been studied. The structural characterization was done before and after measurements by optical microscopy, scanning electron microscopy, and scanning white light interferometry. Wear and corrosion properties were evaluated by ball on disk (ASTM G99-90), rubber wheel (ASTM G65-91), and electrochemical measurements of open circuit and polarization curves. The best corrosion and wear resistance was for the CC-TS obtained by HVOF. The open-circuit potential values measured for both samples after 18 h of immersion were: −0.240 and −0.550 V, respectively, for CC-TS and HC, versus Ag/AgCl,KClsat. Three orders of magnitude lower volume loss were found for CC-TS (HVOF) after friction tests compared with HC.

Keywords

corrosion resistance Cr3C2-NiCr hard chromium high-velocity oxyfuel thermal spray wear 

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Copyright information

© ASM International 2005

Authors and Affiliations

  • J. M. Guilemany
    • 1
  • N. Espallargas
    • 1
  • J. Fernández
    • 1
  • P. H. Suegama
    • 2
  • A. V. Benedetti
    • 2
  1. 1.Thermal Spray Centre, Materials Engineering, Departimento Ingeniería Química y MetalurgiaUniversidad de BarcelonaBarcelonaSpain
  2. 2.Departimento Físico-Química, Instituto de QuímicaUniversidade Estadual Paulista, UNESPAraraquara, SPBrasil

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