Cathodic cleaning of aluminum tube

Details Cathodic cleaning of aluminum tube Cathodic cleaning of aluminum tube

1982-01-18

1984-02-28

Reynolds, B. A.

Electric heating

Metal heating

Of cylinders

219 60A, 219 75, B23K 9235

Patent

active

044343485

ABSTRACT:
A tungsten electrode (35) is positioned adjacent the root face (15) of a tube (10) with the tube and the electrode being connected to a source of direct current (40) such that the electrode is positive with respect to the tube. The electrode is mounted in an assembly (30), and the assembly is provided with a shielding gas from a source (48). The electrode assembly is mounted for rotation on an orbiting head (60) with the electrode axially spaced from the root face. As the electrode is rotated about the tube, the root face (15) and a portion (20) of the inner surface and a portion (25) of the outer surface are simultaneously cathodically cleaned. Preferably, the electrode (35) cleans the root face from two to four times in preparation for a subsequent welding operation.

REFERENCES:
patent: 2906857 (1959-09-01), Nestor
patent: 3278720 (1966-10-01), Dixon
patent: 3280294 (1966-10-01), Polizzano
patent: 3880340 (1975-04-01), Takeuchi
patent: 4168406 (1979-09-01), Torrani
"Cathodic Cleaning and Plasma Arc Welding of Aluminum", H. E. Pattee, R. P. Meister, R. E. Monroe, Welding Research Supplement, May 1968, pp. 226-233.

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