Anode configuration for nickel-phosphorus electroplating

Details Anode configuration for nickel-phosphorus electroplating Anode configuration for nickel-phosphorus electroplating

1987-06-12

1988-11-22

Andrews, R. L.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204286, 204288, 204289, 204290R, 204290F, 204292, C25B 900

Patent

active

047863900

ABSTRACT:
An anode configuration is provided particularly for a bath that is used for electrolytically plating a substrate with a nickel and/or cobalt phosphorus alloy. The anode comprises a plurality of widely spaced portions of material, preferably of platinum or rhodium. The anode configuration is such that the anode has a very high current density in use--at least 200 amperes per square foot and preferably 500 amperes per square foot. The wide spacing of the anode portions may be provided in a number of different ways. A platinum wire may extend between titanium screws attached to a pair of parallel spaced titanium buses, in a zig-zag manner. A platinum wire may be welded at its opposite ends to a titanium bus, and helically wrapped around the bus, with the welding junctions covered by an insulating material (e.g. vinyl). A platinum tube may be shrink fit onto a titanium bus.

REFERENCES:
patent: 3880721 (1975-04-01), Littauer
patent: 4149956 (1979-04-01), Bess et al.
patent: 4673468 (1987-06-01), Myers et al.

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