This study investigates the microstructural characteristics, mechanical properties, and slurry abrasion resistance of WC-10Co-4Cr and WC-10Co-4Cr + GNPs coatings deposited using the High-Velocity Oxy-Fuel (HVOF) process. Cross-sectional micrographs, EDS line scans, and spectra reveal uniform distribution and proper adhesion of tungsten carbide particles, cobalt, chromium, and graphene nanoplatelets (GNPs) throughout the WC-10Co-4Cr + GNPs coating. Microstructural analysis indicates denser structure and reduced porosity in the WC-10Co-4Cr + GNPs coating, leading to enhanced abrasion resistance. Mechanical testing demonstrates higher microhardness and bond strength in the WC-10Co-4Cr + GNPs coating, attributed to the incorporation of GNPs and Laser Surface Texturing (LST). Slurry abrasion tests show substantial reductions in mass loss for both coatings compared to the pristine substrate, with the WC-10Co-4Cr + GNPs coating exhibiting superior performance due to its densification and lubrication effect of GNPs. Overall, the WC-10Co-4Cr + GNPs coating presents a promising solution for applications requiring high wear resistance and durability in harsh environments.