Nukem Limited

Ottomar Pfahls

Willi Wolff

Reinhold Schumacher

Tubes, especially nuclear fuel element jacket tubes, in many cases must be polished internally as well as externally. Previously there was not a satisfactory process for doing this. An electropolishing process for the inner surface of tubes for achieving uniform polishing is desirable. This is accomplished with apparatus in which a metal lance is inserted into the tube being treated. Insulating spacers at the point of the lance and rearwardly thereof from a cathode therebetween spaced uniformly from the inner surface of the tube. Electrolyte flows through such space and preferably is supplied from the interior of the lance.

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Gelnhausen, Germany

Ottomar Pfahls