B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
327/109, 148/13,
B23K 11/16 (2006.01) B23K 11/10 (2006.01) B23K 11/34 (2006.01) C25D 11/04 (2006.01)
Patent
CA 1218422
- 1 - Abstract: A process is described for preparing aluminum sheet for resistance welding, which increases the useful life of the welding electrodes used for welding the thus prepared sheet. The process comprises the steps of: (a) treating both surfaces of the sheet portion to be welded to remove the non-uniform mill finish oxide layer and provide clean surfaces, and (b) providing a thin oxide layer on one cleaned surface and a thicker oxide layer on the other cleaned surface of said sheet, thereby creating a differential in oxide thickness between the surfaces of the sheet and hence a differential in surface resistance.
447465
Alcan International Limited
Kirby Eades Gale Baker
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