Opticalmicroscope（OM）,scanningelectronmicroscope（SEM）,energydispersivespectrometer（EDS）andX-rayDiffraction（XRD）wereusedtostudytheeffectsofrareearthonthemicrostructuralcharacteristicsof55%Al-Zn-1.6%Sihot-dipcoatingsonsteel.TheresultsofOM,SEMandEDSshowedthatbyaddingREintothe55%Al-Zn-1.6%Sibath,thesaw-toothedshapeofintermetallicreactionlayerofcoatingbecamesmooth,andthethicknessoftheoverlayandintermetallicreactionlayerdecreased.TheXRDresultsrevealedthattheintermetallicreactionlayerwascomprisedoftwodifferentregions,abrightphaseclosesttothesteelsubstratewithphasesofFe2Al3andadarkphaseclosesttothemetalliccoatingwithphasesofFeAl3/α-Fe-Al-Si.
