Coated stainless-steel/copper weld for electroplating cathode

Details Coated stainless-steel/copper weld for electroplating cathode Coated stainless-steel/copper weld for electroplating cathode

2006-02-28

2006-02-28

Bell, Bruce F. (Department: 1746)

Metal working

Means to assemble or disassemble

Means to assemble electrical device

C029S747000, C029S761000, C029S729000, C029S825000, C029S869000, C029S877000, C029S878000, C029S879000, C204S281000, C204S286100, C204S297010

Reexamination Certificate

active

07003868

ABSTRACT:
A copper welding rod is used in an arc-welding operation to form a bead that joins a copper starter sheet and a stainless steel hanger bar. The amperage level of the arc-welding equipment is set to generate heat at the weld site which is above the melting point of copper and below the melting point of stainless steel. This results in a welded joint between the copper bead and the hanger bar and a brazed joint between the copper bead and the starter sheet. Since brazing produces little or no fusion, the area of contact between the two dissimilar metals is limited to the interface between them, which significantly reduces the damaging effects of galvanic corrosion. Another improvement lies in the application of a corrosion-resistant metallic coating on the joint between the hanger bar and the starter sheet using a high velocity oxygen fuel flame spray technique.

REFERENCES:
patent: 4186074 (1980-01-01), Perry
patent: 5492609 (1996-02-01), Assenmacher
patent: 5919343 (1999-07-01), Sparapani
patent: 6485621 (2002-11-01), Del Rincon et al.
patent: 6531038 (2003-03-01), Knies et al.
patent: 6569300 (2003-05-01), Assenmacher
patent: 2003/0010630 (2003-01-01), Polvi et al.
patent: 2005/0126906 (2005-06-01), Webb

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