Executive Summary : | Wear is a significant concern in industries like hydropower turbines, marine components, and slurry pumps. High-Velocity Oxy-Fuel (HVOF)-sprayed WC-Co-Cr coating provides good wear resistance to materials exposed to such environments. However, metallic cobalt was labeled as a carcinogen due to the European CLP directive on the classification and labeling of hazardous substances. Researchers have tried alternative coatings based on their wear performances, but none have been found to be suitable. In recent years, Nickel-based WC coatings have gained attention due to their excellent corrosion resistance. Two novel HVOF-sprayed Nickel-based WC coatings were deposited on Monel alloy to control wear losses. The HVOF-sprayed WC-NiCr coating can be a potential alternative to reduce overall wear losses in marine and hydraulic environments. There are still opportunities to enhance the effectiveness of this coating material by using cold spray coating technology and predicting wear rate and behavior using numerical simulations. The author is interested in continuing this work and has experience in characterization and wear testing of thermal sprayed coatings. They propose two objectives for their stay at IIT KGP as an N-PDF fellow. In conclusion, while WC-CoCr coatings offer wear resistance, there is still room for improvement in the use of nickel-based WC coatings in wear and marine environments. |