The effects of glass redox, glass basicity and glass temperature on the metallic material corrosion in molten glass are illustrated with regard to three examples. a) The corrosion of a platinum alloy immersed in a Te-bearing glass under reducing conditions is due to the formation of low melting temperature PtxTe1-x compounds. b) The corrosion of a Ni-base superalloy immersed in a Mo-bearing glass in a reducing atmosphere is due to the dissolution of the chromia protective scale. Indeed the cathodic reaction (Mo(VI)lozenge Mo-III) generates O2- ions which can promote the basic dissolution of Cr2O3. c) The corrosion of a Co-base superalloy in molten C-glass is investigated as a function of temperature, yielding to the demonstration of the existence of a maximum using temperature, characterized by a passive-to-active state transition.