Ceramics-Silikáty 24, (1) 17 - 22 (1980) |
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THE EFFECT OF DIRECT CURRENT ON THE CORROSION OF TIN OXIDE ELECTRODES IN LEAD GLASS MELT
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Matěj Jiří 1, Kutzendörfer Jaroslav 2, Friedrich Manfred 2
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1 Joint Laboratory for the Chemistry and Technology of Silicates, Czechoslovak Academy of Sciences and Institute of Chemical Technology, 166 28 Prague 6, Suchbátarova 5
2 Institute of Chemical Technology, Department of the Technology of Silicates, 166 28, Prague 6,
Suchbátarova 5
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Direct current of a density of up to 50 mAmpcm² accelerates corrosion of tin oxide electrodes of both polarities. Corrosion of the cathode increases roughly linearly with current density. Components of the melt penetrate into the cathode material. Corrosion of the anode is substantially less extensive. Its dependence on current density shows an insignificant peak at about 10 mAmp/cm². The increased corrosion is probably due to mixing of the melt by bubbles of the liberated oxygen. The observed cation depletion in the anodic region takes place at higher current densities and acts in the opposite direction.
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