Method and apparatus for detecting faults in the enamel coating of a vessel having electrically conductive tantalum plugs wherein a passivating insulating layer is formed on the plugs
Abstract
Abstract FAULTS IN THE ENAMEL COATING OF VESSELS WHICH HAVE ELECTRICALLY CONDUCTIVE TANTALUM PLUGS EXTEND THROUGH THE WALLS OF THE VESSEL, AND ADAPTED TO HOLD ELECTRICALLY CONDUCTIVE LIQUIDS, ARE DETECTED BY INTRODUCING INTO THE VESSEL AN EXPOSED ELECTRODE, AND CONNECTING THE ELECTRODE AND THE METAL WALL OF THE ENAMELED VESSEL TO THE NEGATIVE, AND POSITIVE TERMINAL, RESPECTIVELY, OF AN ELECTRICAL DIRECT CURRENT CIRCUIT WHICH INCLUDES A CURRENT SENSITIVE RELAY. UPON CONNECTION, A PASSIVATING, INSULATING LAYER IS FORMED ON THE TANTALUM PLUGS. REMAINING LEAKAGE CURRENT IS BALANCED OUT AND ADDITIONAL CURRENT DUE TO BREAKDOWN IN ENAMEL IS DETECTED BY CHANGES IN CURRENT IN THE CIRCUIT, CAUSING THE RELAY TO RESPOND.
Inventors
- 👤 Hermann Deichelmann
Bibliographic Details
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