Erosion/corrosion of HVOF sprayed coatings
- National Research Council Canada, Boucherville, Quebec (Canada). Industrial Materials Inst.
- National Research Council Canada, Vancouver, British Columbia (Canada). Integrated manufacturing Technologies Inst.
Cermet based materials are known to have an excellent performance under several different wear conditions. High velocity oxy-fuel (HVOF) thermal spraying technology allows the deposition of such hard materials in the form of protective coatings onto different surfaces. Under slurry erosion, the performance of the coating is influenced by the occurrence of corrosion reactions with the metallic matrix. Slurry erosion tests were conducted with a jet impingement rig with a 9.1wt% alumina particle/water slurry. Indeed, wet conditions promote the dissolution of metallic binder resulting in a potential synergy between the corrosion and wear mechanisms. Coatings based on tungsten carbide embedded in four different metallic binders were evaluated with regard to wear and corrosion. Depending on the composition of the metallic binder, different degradation rates were observed.
- OSTI ID:
- 697076
- Report Number(s):
- CONF-990401--
- Country of Publication:
- United States
- Language:
- English
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