Nowadays,　wire-arc　spraying　is　an　attractive　technique　to　deposit　coatings　for　oxidation　and　corrosion　protection.　In　this　study,　a　new　FeCrSiB-cored　wire　was　designed　to　produce　protective　coatings　for　the　components　used　in　high　temperature　environment　by　wire-arc　spraying.　The　microstructure,　phase　composition,　microhardness,　and　high　temperature　corrosion　behavior　of　the　new　coating　were　investigated　in　comparison　with　a　FeCr　coating　and　a　commercial　NiCrTi　coating.　The　results　showed　that　the　FeCrSiB　coating　was　composed　of　dense　lamella　with　much　fewer　oxide　inclusions　than　the　FeCr　and　NiCrTi　coatings.　The　microhardness　of　the　FeCrSiB　coating　was　the　highest　of　the　three　coatings.　Thermogravimetric　analysis　was　used　to　evaluate　the　high　temperature　corrosion　behavior　of　the　coatings　in　mixed　salt　Na2SO4-25%　K2SO4　environment　at　650　A　degrees　C　under　cyclic　condition.　It　showed　that　the　high　temperature　corrosion　resistance　of　the　FeCrSiB　coating　is　significantly　better　than　that　of　the　FeCr　coating　and　approaching　to　the　commercial　NiCrTi　coating.