Funct. Mater. 2020; 27 4: 744-753.
Comparative analysis of cavitation erosion resistance of carbide and nitride thick coatings for power industry applications
1NSC Kharkov Institute of Physics & Technology, National Academy of Sciences of Ukraine, 1 Akademicheskaya Str., 61108 Kharkov, Ukraine
2The Szewalski Institute of Fluid-Flow Machinery of the Polish Academy of Sciences, 14 J.Fiszera Str., 80231 Gdansk, Poland
3Gdansk University of Technology, 11/12 G.Narutowicza Str., 80233 Gdansk, Poland
Various protective coatings are applied for decreasing of the effect of destructive factors such as corrosion and erosion, and for increasing the useful lifetime of turbomachinery elements. The cavitation erosion resistance of carbide and nitride thick (up to 20 μm) coatings by means of the rotating disk testing method is analysed in the present study. Results show that all coated samples under investigation are characterized by lower cavitation wear than that of the uncoated ones. Both nitride TiN, CrN, and carbide CrC coatings significantly improve erosion resistance of the stainless steel samples. CrC thick coatings with the ability to form nano-cristalline structure demonstrate the best protective efficacy for various anti-erosion applications.
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