Abstract
In order to achieve a desired dense structure for
coatings employed in high temperature corrosion
conditions, thermal spray process optimization with
diagnostic tools can be applied. In this study, NiCr
(51Ni-46Cr-2Si-1Fe) and FeCr
(Fe-19Cr-9W-7Nb-4Mo-5B-2C-2Si-1Mn) powders were sprayed
with HVOFGF (gas-fueled) and HVOFLF (liquid-fueled)
systems, and the spray processes were monitored with
diagnostic tools, including SprayWatch for measuring the
temperature and velocity of the spray stream, and in situ
coating property (ICP measurement) for measuring the
stress state. Various spray parameters were applied to
attain the best coating characteristics for high
temperature applications. Selected coatings were exposed
to high temperature corrosion conditions both in
laboratory and actual power plant. The coatings were
analyzed by microscopic means and mechanical testing. The
application of process-structure-properties-performance
methodology with the process monitoring, analysis of the
coating characteristics, and results of corrosion
performance are presented in this paper.
| Original language | English |
|---|---|
| Pages (from-to) | 436-453 |
| Journal | Journal of Thermal Spray Technology |
| Volume | 24 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2015 |
| MoE publication type | A1 Journal article-refereed |
Keywords
- coatings
- corrosion
- high temperature applications
- HVOF thermal spraying
- optimization