Reactive wetting during hot-dip galvanizing of high manganese alloyed steel

► Examination of reactive Zn wetting of high Mn alloyed steel. ► Successful bright annealing avoided external MnO. ► Fe-Zn phase appeared in spite of aluminothermic MnO reduction was prevented. ► Metallic Mn of the steel bulk obviously influences wetting reaction. ► Proposal of an alternative model of reactive Zn wetting of Mn alloyed steel.