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

C - Chemistry, Metallurgy

25

C

C25C 7/02 (2006.01)

Patent

CA 2433989

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.

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