Microstructure and properties of Fe-based amorphous metallic coating produced by high velocity axial plasma spraying

An FeCrMoMnWBCSi amorphous metallic coating with thickness of about 1 mm and porosity less than 0.1% was deposited onto a mild steel by a high velocity axial plasma spraying. The microstructure evolution of the coating was characterized with SEM, XRD, and the coating micro-hardness, erosion–corrosion and corrosion behavior were tested. It was found that the formation of amorphous phase in the coating is sensitive to plasma spray parameters, and powder size. The coating exhibited a good combination of high micro-hardness and excellent erosion–corrosion resistance even in a serious media. This amorphous metallic coating could be applied as a good alternative material in erosion and corrosion environments.