In　this　work,　a　new　WC-Cr3C2-CoNi　coating　was　fabricated　on　steel　substrate　by　thermal　spraying　the　feedstock　powder　after　an　alumina-assisted　pre-alloying　treatment.　The　Cr3C2　content　in　the　cermet　coating　was　optimized　based　on　the　comparison　of　wear　and　corrosion　properties　with　the　conventional　WC-based　coating.　The　results　showed　that　a　(Co,　Ni)6(W,Cr)6C　solid-solution　binder　phase　was　formed　because　of　the　pre-alloying　treatment　above　the　eutectic　temperature　of　feedstock　powder.　Moreover,　sufficient　diffusion　of　various　atoms　enabled　the　achievement　of　complete　metallurgical　bonding　between　carbides　and　the　binder　phase　in　the　feedstock　particles.　These　featured　microstructures　were　partially　retained　in　the　resultant　coatings,　which　thus　possessed　exceptional　wear　and　corrosion　resistance.　The　performance　enhancement　mechanisms　of　the　developed　coatings　were　proposed　in　terms　of　the　unique　design　in　composition　and　microstructure　of　the　pre-alloyed　feedstock　powder.