Electrochemical graining method

Details Electrochemical graining method Electrochemical graining method

1994-12-22

1998-05-26

Valentine, Donald R.

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Coating predominantly single metal or alloy substrate of...

205201, 205214, 205220, 205659, 205660, 205704, 205921, C25F 304, C25D 1104, C25D 1116

Patent

active

057559490

ABSTRACT:
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/m.sup.2. 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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