FeCrNiCoBx　high-entropy　alloy　coatings　were　prepared　by　laser　cladding,　and　the　effects　of　boron　addition　on　the　microstructure,　hardness　and　corrosion　resistance　of　the　coatings　were　studied.　Results　showed　that　the　coatings　comprised　a　simple　FCC　solid　solution　with　boride　precipitation.　When　0.5　≤　x　≤　1.0,　(Cr,　Fe)2B　with　an　orthorhombic　structure　was　found　in　the　coatings,　and　the　hardness　and　corrosion　resistance　of　the　coatings　were　enhanced　by　increasing　boron　content.　As　x　approached　1.25,　the　borides　changed　from　orthorhombic　(Cr,　Fe)2B　to　tetragonal　(Fe,　Cr)2B,　which　deteriorated　the　corrosion　resistance　of　the　coatings.　Stacking　faults　found　in　(Cr,　Fe)2B　may　be　caused　by　the　phase　transformation　of　borides.　©　2016　Institute　of　Materials,　Minerals　and　Mining.