The　water-droplet　erosion　of　low-pressure　steam　turbine　blades　under　wet　steam　environments　can　alter　the　vibration　characteristics　of　the　blade,　and　lead　to　its　premature　failure.　Using　high-velocity　oxygen-fuel　(HVOF)　sprayed　water-droplet　erosion　resistant　coating　is　beneficial　in　preventing　the　erosion　failure,　while　the　erosion　behavior　of　such　coatings　is　still　not　revealed　so　far.　Here,　we　examined　the　water-droplet　erosion　resistance　of　Cr3C2-25NiCr　and　WC-10Co-4Cr　HVOF　sprayed　coatings　using　a　pulsed　water　jet　device　with　different　impingement　angles.　Combined　with　microscopic　characterization,　indentation,　and　adhesion　tests,　we　found　that:　(1)　both　of　the　coatings　exhibited　a　similar　three-stage　erosion　behavior,　from　the　formation　of　discrete　erosion　surface　cavities　and　continuous　grooves　to　the　broadening　and　deepening　of　the　groove,　(2)　the　erosion　rate　accelerates　with　the　increasing　impingement　angle　of　the　water　jet;　besides,　the　impingement　angle　had　a　nonlinear　effect　on　the　cumulative　mass　loss,　and　30°　sample　exhibited　the　smallest　mass　loss　per　unit　area　(3)　an　improvement　in　the　interfacial　adhesion　strength,　fracture　toughness,　and　hardness　of　the　coating　enhanced　the　water-droplet　erosion　resistance.　These　results　provide　guidance　pertaining　to　the　engineering　application　of　water　erosion　protective　coatings　on　steam　turbine　blades.　©　2021　Walter　de　Gruyter　GmbH,　Berlin/Boston.