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Author: Fleischmann, Bernhard × Author: Mergler, Kurt Wilhelm × Has files: Yes × Publisher: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft ×

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    Determination of the corrosion progress of zirconium oxide containing refractories based on the natural intrinsic gamma radiation of the material
    (Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 2001) Fleischmann, Bernhard; Baumann, Patrick; Mergler, Kurt Wilhelm
    The determination of the corrosion progress of refractory blocks is interesting for the operation of glass furnace tanks under safety and economic aspects. The measuring principle, based on the very small natural radiation of impurities of the zirconium raw materials for refractory production, has been known since the beginning of the seventies of the last century and could now be developed through improvements of measuring technology and sensors. Smaller changes to a laboratory test setup from medical technology were made both in the hardware and the software, to enable measurements of the intrinsie radiation of fused-cast AZS refractory materials in hot and dusty environment on glass melting furnaces during operation. Α measuring schedule was developed and calibrating measurements were carried out with blocks of different zirconia content. First practical tests were made on cold glass furnaces. The final adaptation of the equipment was done with measurements on operating glass furnaces. The measurements of the corrosion progress and/or the residual thickness of refractory blocks based on the natural intrinsic gamma radiation could be done with the expected accuracy and can be used to support the operator of glass melting tanks.
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    Cathodic electrochemical protection of molybdenum electrodes in an all-electric melter
    (Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 1998) Fleischmann, Bernhard; Mergler, Kurt Wilhelm
    During several research programmes the cathodic protection of molybdenum heating electrodes was tested step by step on an allelectric glass melting furnace over eight years. Starting with one pair at least, all 12 heating electrodes were superimposed with a negative direct voltage to reduce the corrosion of molybdenum. The molybdenum release of the electrodes could nearly be halved at the used furnace and with the glass melted. The molybdenum content of the glass was determined to compare the unprotected and the protected State, respectively, and to confirm the success of the cathodic protection.