C - Chemistry – Metallurgy – 25 – F
Patent
C - Chemistry, Metallurgy
25
F
204/117, 204/84
C25F 3/22 (2006.01) C25F 7/00 (2006.01)
Patent
CA 1127997
Abstract of the Disclosure An apparatus and method for using same are dis- closed for electro-polishing large flat or slightly curved surfaces on metal objects. The apparatus includes a shallow structure for electro-polishing flat horizontal surfaces, and a thin deep structure for electro-polishing vertical surfaces. The structure may be a tank having a liquid bath therein for immersing therein the metal object to be electro-polished. If the object is too large to be im- mersed in a separate tank, a temporary liquid bath con- taining structure is built on and around the object such that the surface to be electro-polished forms a boundary of the liquid containing structure In either embodiment, a movable electrode (cathode) is suspended from the sides of the structure and includes an active portion thereof which is positioned parallel to and spatially related to at least a portion of the surface to be electro-polished. In the method, the object is given a positive electric charge, the cathode (ungrounded) is given a negative charge, and as a portion of the surface is electro-polished, the cathode is moved, either continuously intermittently across the entire surface on which polishing is desired.
309667
Jumer John F.
Osler Hoskin & Harcourt Llp
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