C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
204/1, 204/134,
C25D 5/02 (2006.01) C25D 17/00 (2006.01) C25F 3/02 (2006.01) C25F 7/00 (2006.01) H05K 3/07 (2006.01)
Patent
CA 1112205
Abstract of the Disclosure A method of electrochemically processing metallic surfaces of workpieces arranged in a contact-free manner with regard to the cathode and anode of an electrolytic cell by means of an electrolyte. For the purpose of transferring an electric charge onto the workpiece surface to be pro- cessed, the electrolyte contains suspended electrically conductive bodies. These electrically conductive bodies are charged in a first chamber of the cell that contains the electrode the polarity of which determines the pro- cessing (oxidative or reductive treatment) of the workpiece surface. A shielding diaphragm or ion exchange membrane prevents the electrically con- ductive bodies from discharging on the counter-electrode, the electrolyte being positively circulated in a circuit between the charging electrode and the workpiece to be processed. Outside the electrolytic cell, after separation of the suspended electrically conductive bodies, electrolyte is withdrawn from the circuit, and is introduced into the second chamber of electrolytic cell that contains the counter-electrode shielded by the diaphragm. A conveying line for the electrolyte containing the electrically conductive bodies extends between the first chamber of the electrolytic cell and the treatment chamber. One portion of said conveying line outside the electrolytic cell comprises a porous wall which is permeable to the electro- lyte but retains the electrically conductive bodies. An annular chamber formed between the porous wall and a surrounding outer pipe communicates with the second chamber (containing the counter-electrode) in the electrolytic cell for exchanging electrolyte.
285074
Faul Wolfgang
Kastening Bertel
Kernforschungsanlage Julich Gesellschaft Mit Beschrankter Haftun
Smart & Biggar
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