Effect of Graphite Content on Corrosion Resistance of Zirconia Graphite Materials

The effect of graphite content on formation of decarbonization layer and corrosion resistance of zirconia graphite materials were studied by the corrosion test in induction furnace, and the effect of decarbonization layer on corrosion of zirconia graphite materials was also analysed by the kinetic models for the corrosion of SEN in mold, the result show that Thickness of decarbonization layer of slag line is decreasing with the increase of graphite content. Corrosion of zirconia graphite materials in steel liquid / slag interface is characterized by the features of consecutive reaction:original layer→decarbonization layer→corrosion layer, and k1, and k2 are their reaction rate constant respectively.when we adjust graphite content, k1 and k2 will be change in opposite directions, so graphite content with well corrosion resistance depend on the condition of continuous casting