The corrosion of refractories by liquid metals and slags

The dissolution of the refractoty by die first mechanism is described by an equation due to Levich (1962), where the flux, j, of the material away from the wall is calculated tlrrough the equation 

The simple model given above does not take account of the facts that industrial refractories are poly crystalline, usually non-uniform in composition, and operate in temperature gradients, both horizontal and vertical. Changes in the coiTosion of multicomponent refractories will also occur when there is a change in the nature of tire phase in contact with the conoding liquid for example in Ca0-Mg0-Al203-Cf203 refractories which contain several phases. 

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