The　interfacial　morphologies　and　erosion-corrosion　behavior　of　directional　Fe-3.5　wt.%　B　steel　in　flowing　liquid　Zn-0.30　wt.%　Al　were　investigated.　Adding　0.30　wt.%　Al　to　liquid　zinc　significantly　improved　the　erosion-corrosion　resistance　of　directional　Fe-3.5　wt.%　B　steel,　which　possesses　greater　erosion-corrosion　resistance　when　the　[002]　orientation　of　Fe2B　is　perpendicular　to　the　erosion-corrosion　interface.　The　erosion-corrosion　interface　consisted　of　an　inhibition　layer,　determined　by　0.30　wt.%　Al,　liquid　zinc　temperature　and　Fe2B　orientation.　This　interface　inhibited　the　diffusion,　controlled　Fe2B　failure　mode,　resisted　micromechanical　scouring,　and　suppressed　erosion-corrosion.　Deterioration　of　the　inhibition　layer　at　the　erosion-corrosion　interface　resulted　in　severe　erosion-corrosion　damage.　(C)　2016　Elsevier　Ltd.　All　rights　reserved.