Refractory corrosion by slag under an applied voltage

Authors

Brian J. Monaghan, University of WollongongFollow
Sharon Nightingale, University of WollongongFollow
Q Dong, University of Wollongong
Michael Funcik, University of Wollongong

RIS ID

15205

Publication Details

Monaghan, BJ, Nightingale, SA, Dong, Q & Funcik, M, Refractory corrosion by slag under an applied voltage, Materials Science & Technology 2006, p 29-38, USA: AIST.

Abstract

The effect of an applied voltage on the dissolution rate of MgO refractory in two steelmaking type slags has been investigated. It was found that the MgO corrosion in a CaO-SiO2-Al2O3 based slag proved insensitive to an applied voltage over the voltage range –0.5 to 0.3V. The corrosion rate of the dense MgO in a CaO-SiO2-Fe2O3-FeO-MgO slag showed a maximum corrosion rate at –0.45V. This effect has been explained by considering the consequences of an applied voltage on the rate of Marangoni flow at the slag-refractory-gas interface and in turn, the flow effect on the rate of the mass transfer controlled MgO dissolution reaction.