In the paper,the effect of electric field voltage on the interfacial free energy between mol-ten steel and Al2O3 inclusions is studied by high temperature electrowetting,and the experimental re-sults are verified by Young equation.It can be seen from the high temperature electrowetting that with the increase of the electric field voltage,the contact angle between the molten steel and the Al2O3 in-clusion phase gradually decreases.When the electric field voltage increases to 20 V(threshold val-ue),the contact angle between the two phases does not change.Using the contact angle obtained from the high temperature electrowetting experiment,based on Young's equation,it can be proved that with the increase of electric field voltage,the interface free energy between molten steel and Al2O3 inclu-sions gradually decreases.
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