Simplifying the erosion-corrosion mechanism map for the erosion of thin coatings in aqueous slurries

Margaret Stack, H.W. Wang

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

A significant advance in the study of erosive wear in recent years has been the construction of erosion mechanism mop showing the transitions between the erosion-corrosion regimes as a function of the main process parameters. The various corrosion regimes, ranging from active to passive conditions, have been incorporated on the map. Hence, the map is more complex than that in dry oxidizing conditions when the predominant corrosion process is film growth. The object of this work has been to study the combined effects of increasing erodent velocity and applied potential on the erosion of PVD coatings, i.e., Ti2N and CrN in aqueous conditions. The substrate was mild steel, the particles alumina and the solution, a carbonate-bicarbonate buffer, Mechanisms of erosion-corrosion were identified on the basis of the results. The erosion mechanism maps generated from the results provided a means of differentiating between erosion-corrosion behaviour of the coating and the substrate. Significant shifts in the boundaries were identified for different coatings. The stages in the construction of such maps, in addition to the various approaches towards simplifying the nomenclature and the format, are described in this paper.
Original languageEnglish
Pages (from-to)542-551
Number of pages10
JournalWear
Volume233-235
DOIs
Publication statusPublished - Dec 1999

Keywords

  • erosion-corrosion mechanism map
  • thin coatings
  • aqueous slurries
  • elevated temperature erosion
  • construction
  • oxidation
  • aluminium
  • steel

Fingerprint Dive into the research topics of 'Simplifying the erosion-corrosion mechanism map for the erosion of thin coatings in aqueous slurries'. Together they form a unique fingerprint.

  • Cite this