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- ItemElectric melting of glass: Influence of cathodic currents on the formation of protective layers on molybdenum electrodes(Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 1998) Rüssel, Christian; Kämpfer, AndreaThe influence of cathodic currents on the corrosion of molybdenum electrodes during electrical melting of glass was studied with the aid of laboratory experiments. It is shown that cathodic currents lead to the formation of molybdenum silicide layers on the electrode. Best results were obtained using a DC current density of 3.75 mA/cm² at a heating current density of 1 A/cm². Higher DC current densities resulted in molybdenum silicide layers, which dissolve in the melt as silicide particles. Simultaneous to the molybdenum silicide layers, at the counter electrodes MoO₂ layers are formed, which also dissolve as particles in the melt.
- ItemInfluence of process parameters on the formation of protective MoSiₓ layers on molybdenum electrodes during electric melting of glass(Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 1998) Rüssel, Christian; Kämpfer, AndreaWith the aid of laboratory experiments, the cathodic passivation of molybdenum electrodes during electrical melting of glass was studied. The formation of molybdenum silicide layers does not only depend on the cathodic passivation currents, but also on time and the AC heating current density If the melt has freshly been prepared from raw materials, the molybdenum silicide layer is thinner than under otherwise same conditions. While at an AC heating current density of 1 A/cm², a cathodic current density of 3.75 mA/cm² led to Optimum layer formation, at a heating current density of 2 A/cm², higher cathodic current densities are required.