A comparison of the corrosion behavior of WC-Co-Cr and WC-Co HVOF thermally sprayed coatings by in situ Atomic Force Microscopy (AFM)

Joan M. Perry, Anne Neville, Trevor Hodgkiess

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52 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)536-541
Number of pages6
JournalJournal of Thermal Spray Technology
Volume11
Issue number4
DOIs
Publication statusPublished - Dec 2002

Keywords

  • Atomic force microscopy (AFM)
  • Cermet
  • Corrosion
  • Electrochemical

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