Electrochemical graining of aluminum or aluminum alloy surfaces

Details Electrochemical graining of aluminum or aluminum alloy surfaces Electrochemical graining of aluminum or aluminum alloy surfaces

1990-05-24

1991-11-12

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

2041294, 2041295, 20412995, C25D 544, C25F 304

Patent

active

050645110

ABSTRACT:
Aluminum or its alloys are electrochemically grained by using alternate current and an aqueous electrolyte comprising specific amounts of hydrochloric acid and an oxy-acid and/or a dicarboxylic acid, preferably lactic acid and/or succinic acid, respectively. Aluminum (or an alloy thereof) thus grained, can be coated with a photosensitive layer whereby forming a printing plate. Before coating it with the photosensitive layer, the plate can also be anodized by techniques well known to those skilled in the art.

REFERENCES:
patent: 3728237 (1973-04-01), Heijenbrok et al.
patent: 4052275 (1977-10-01), Gumbinner et al.
patent: 4174269 (1979-11-01), Carlin et al.
patent: 4396468 (1983-08-01), Walls
patent: 4547275 (1985-10-01), Ejima et al.

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