en Research Paper Research Paper In this paper, an investigation was carried out to test the suitability of potential additive materials in<br> WOKA 3533 (WC-10Co4Cr) cermet HVOF coating subjected to slurry erosion in ash conditions. The additives<br> namely molybdenum carbide, yttrium oxide, and zirconium oxide were added in equal percentages (3 wt.%) in<br> WOKA cermet powder. High-velocity oxy-fuel (HVOF) spraying was performed to develop the additive-based<br> WOKA cermet coatings. The slurry erosion in ash conditions was tested using the pot tester. Microstructural and<br> mechanical properties of traditional and additive-based WOKA cermet coatings were also tested in the present<br> study; for example, microstructure, crystalline phases of as-sprayed coatings, and microhardness. Results present a<br> comparison of surface erosion wear of different cermet coatings. It was found that the yttrium oxide was a suitable<br> additive for the WOKA cermet coatings than the molybdenum carbide. However, zirconium oxide is unsuitable for<br> WOKA cermet coatings in erosion wear applications. Slurry erosion, HVOF coating, cermet, slurry pump, ash transportation 1 12 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-3959-2&slc_lang=en&sid=1 Jashanpreet Singh ijashanpreet@gmail.com 1800319475328460016451 1800319475328460016451 Yes University Center for Research & Development, Chandigarh University, Mohali 140413, India Rana Gill er.ranasandhu@gmail.com 1800319475328460016452 1800319475328460016452 No University Center for Research & Development, Chandigarh University, Mohali 140413, India.Department of Electronics and Communication Engineering, Chandigarh University, Mohali 140413, Punjab, India Satish Kumar satish.me@nitjsr.acc.in 1800319475328460016453 1800319475328460016453 No Department of Mechanical Engineering, National Institute of Technology, Jamshedpur 831014, Jharkhand, India S.K. Mohapatra sk.mohapatra@thapar.edu 1800319475328460016454 1800319475328460016454 No Mechanical Engineering Department, Thapar Institute of Engineering and Technology, Patiala 147004, Punjab, India