This study evaluates an internal diameter HVAF spray system and compares coatings characteristics obtained with WC and Cr3C2 based powders with those achieved via standard HVAF spraying. Coating microstructure, phase composition, hardness, roughness, and corrosion resistance are investigated and the potential for further optimization is discussed. It is also shown that the new system can be used for grit-blasting as well as spraying.

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