Trade-Off Among Cavitation Erosion Resistance, Corrosion Resistance, and Antifouling Properties of HVOF-Sprayed WC-CoCr Coating via Adding Stainless Steel and Copper

This work investigated the trade-off among cavitation erosion resistance, corrosion resistance, and antifouling properties in HVOF-sprayed WC-10Co4Cr coatings. By adding 316L stainless steel (316L) and copper to WC-10Co4Cr coatings, this work aimed to enhance their antifouling ability while maintaining their cavitation erosion and corrosion resistances, presenting a comprehensive evaluation of the modified coatings, including their microstructure, hardness, fracture toughness, and resistance to cavitation erosion, corrosion, and biofouling. The results revealed that Cu addition significantly improved the antifouling property but at a cost of the compromised cavitation erosion and corrosion resistances. In contrast, 316L enhanced the cavitation erosion and corrosion resistances but did not effectively improve the antifouling property. The dual addition of Cu and 316L demonstrated a balanced performance in all three aspects. This research contributed to the development of HVOF-sprayed WC-CoCr coatings suitable for marine environments, suggesting further optimization possibilities by altering Cu and 316L contents.