Electrochemical graining method

Details Electrochemical graining method Electrochemical graining method

C - Chemistry, Metallurgy

25

F

C25F 3/04 (2006.01) B41N 1/00 (2006.01) B41N 3/03 (2006.01) G03F 7/038 (2006.01)

Patent

CA 2137423

A plate-, foil- or web-shaped workpiece of aluminum or an alloy thereof is subjected, in an electrolyte bath, to an alternating current at a frequency of 0.1 to 25 Hz. During the AC treatment, an anodic potential is imposed on the workpiece, in the range of 0 to 5 Volts. The total charge input is 10 to 60 kC/m2. Prior to the electrochemical graining, the workpiece is mechanically grained. After the graining steps, an etching treatment as well as an anodical oxidation and, thereafter, a hydrophilization are performed.

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