Gallium plating

Chemistry: electrical and wave energy – Processes and products

Patent

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Details

204146, 204224R, C25D 506, C25D 1714, C25F 500

Patent

active

042513286

ABSTRACT:
A method and apparatus for the selective plating of liquid gallium metal on conductive surfaces is disclosed. The preferred embodiment of the present invention comprises a cylindrical tube of nonconductive material having an open end covered with felt material. The felt retains a reservoir of liquid gallium; floating on the liquid gallium is a reservoir of water containing a soluble metal hydroxide. Extending through the water solution and the liquid gallium is an electrode which is preferably positioned in the gallium but not against the felt cover. The resulting electroplating brush is employed in a vertical or near vertical position to brush plate gallium onto an electrically conductive surface which is maintained at a negative electrical potential with respect to the electrode. By reversing polarity of the surface with respect to the electrode, deplating of the surface may be performed.

REFERENCES:
patent: 828814 (1906-08-01), Cunningham
patent: 2108700 (1938-02-01), Adey
patent: 2931758 (1960-04-01), Zimmerman
patent: 3346477 (1967-10-01), Wolfer
Modern Electroplating, Edited by Frederick A. Lowenheim, 3rd Edition, 1974, pp. 470, 481.

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