Selective stripping apparatus

Details Selective stripping apparatus Selective stripping apparatus

1989-06-07

1991-03-26

Valentine, Donald R.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204237, 204272, 204273, 204275, 156345, 156642, 156656, C25F 500, C25F 700

Patent

active

050026496

ABSTRACT:
An apparatus for electroplating a selected surface of a workpiece, or electrolytically or chemically stripping a plating therefrom, comprises an electrode or center constrictor member having an active surface with a selected shape to combine with the selected surface of the workpiece to define an elongated gap of at least about 0.050 inches therebetween, means for supporting this constrictor member in a fixed position to define the elongated gap; solution circulating means for forcing a stripping solution through the gap in a generally closed path at a velocity to exchange stripping solution in the gap at a rate of at least 25 times per minute. When used for either electroplating or electrolytically stripping, the apparatus is provided with means for applying current flow between the selected workpiece surface and the active surface of the electrode through the gap at a current density of at least 2.0 amperes/in.sup.2.

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