Electrochemical and mechanical interactions during erosion-corrosion of a high-velocity oxy-fuel coating and a stainless steel

T. Hodgkiess, A. Neville, S. Shrestha

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

This paper describes the results of a study of the erosion-corrosion behaviour of a thermally sprayed Ni-Cr-Si-B-C cermet coating in saline solution in the presence and absence of solid particles. The water, at ambient temperature, impinged perpendicularly onto the specimen surface at a velocity of 17 m/s. Emphasis was placed on the assessment of the contribution of corrosion processes to the overall erosion-corrosion deterioration. For comparison purposes in terms of performance and degradation mechanisms, parallel tests were carried out on a standard stainless steel alloy (UNS S31603). The study provided clear evidence of the crucial role of corrosion processes in governing the extent (totalling about 30% in solid/liquid impingement) and mechanisms of erosion-corrosion of the cermet material. The cermet coating was found to undergo less weight loss than the stainless steel in solid/liquid conditions but vice-versa during solid-free impingement and this was attributed to the relative influences of erosion and corrosion.

Original languageEnglish
Pages (from-to)623-634
Number of pages12
JournalWear
Volume233-235
DOIs
Publication statusPublished - Dec 1999
Event1998 International Conference on Erosive and Abrasive Wear - 9th International Conference on Erosion by Liquid and Solid Impact - Cambridge, UK
Duration: 13 Sep 199817 Sep 1998

Keywords

  • Cermets
  • Erosion-corrosion
  • HVOF spraying
  • Stainless steel
  • Synergism

Fingerprint Dive into the research topics of 'Electrochemical and mechanical interactions during erosion-corrosion of a high-velocity oxy-fuel coating and a stainless steel'. Together they form a unique fingerprint.

  • Cite this