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A comparison of the corrosion behavior of WC-Co-Cr and WC-Co HVOF thermally sprayed coatings by in situ atomic force microscopy (AFM)

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Abstract

The corrosion behavior of WC-Co-Cr and WC-Co high velocity oxygen fuel (HVOF) sprayed coatings were examined in static saline conditions. Direct current (DC) polarization tests were conducted and the electrochemical corrosion behavior was shown, by in situ atomic force microscopy (AFM) and scanning electron microscopy (SEM), to be complex because of the composite ceramic-metal nature of the coating. The addition of chromium to the matrix greatly enhanced the corrosion resistance of the coating.

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Authors and Affiliations

  1. Department of Mechanical Engineering, University of Glasgow, G12 8QQ, Glasgow, Scotland

    Joan M. Perry & Trevor Hodgkiess

  2. Department of Mechanical and Chemical Engineering, Heriot-Watt University, EH14 4AS, Edinburgh, Scotland

    Anne Neville

Authors
  1. Joan M. Perry
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  2. Trevor Hodgkiess
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  3. Anne Neville
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Perry, J.M., Hodgkiess, T. & Neville, A. A comparison of the corrosion behavior of WC-Co-Cr and WC-Co HVOF thermally sprayed coatings by in situ atomic force microscopy (AFM). J Therm Spray Tech 11, 536–541 (2002). https://doi.org/10.1361/105996302770348673

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  • DOI: https://doi.org/10.1361/105996302770348673

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