Fe-Cr-Al　and　Fe-Cr-Al-B　cored　wires　were　designed　and　produced　to　deposit　protective　coatings　for　components　used　in　high　temperature　environments　by　wire　arc　spraying　technique.　The　microstructure,　microhardness　and　high　temperature　corrosion　behaviour　of　the　new　coatings　were　investigated　in　comparison　with　Fe-Cr　coating　and　with　commercial　Fe-Cr-Al　coating.　All　coatings　presented　lamellar　microstructures　with　oxide　inclusions.　The　new　Fe-Cr-Al-B　coating　showed　the　fewest　oxide　inclusions　among　all　the　coatings.　The　microhardness　of　Fe-Cr-Al　coating　was　quite　low,　while　the　microhardness　of　Fe-Cr-Al-B　was　found　to　be　higher.　Thermogravimetric　analysis　was　used　to　evaluate　the　high　temperature　corrosion　behaviour　of　the　coatings　in　a　molten　salt　(Na2SO4-25%K2SO4)　environment　at　650　degrees　C　under　cyclic　conditions.　The　results　showed　that　the　new　Fe-Cr-Al-B　coating　exhibited　the　best　high　temperature　corrosion　behaviour.