Anodically oxidizing aluminum in electrolyte containing...

Details Anodically oxidizing aluminum in electrolyte containing... Anodically oxidizing aluminum in electrolyte containing...

C - Chemistry, Metallurgy

25

D

204/24.5

C25D 11/08 (2006.01) B41N 3/03 (2006.01) C25D 11/04 (2006.01)

Patent

CA 1137917

?oc 78, 011 PROCESS FOR ANODICALLY OXIDIZING ALUMINUM AND USE OF THE MATERIAL SO PREPARED AS A PRINTING PLATE SUPPORT Abstract of the Disclosure This invention relates to an improvement in the process for anodically oxidizing materials in the form of strips, foils, or plates comprised of aluminum or aluminum alloys in an aqueous electrolyte containing sulfuric acid and aluminum ions, if appropriate, after a foregoing mechanical, chemical, or electrochemical roughen- ing, the improvement comprising anodically oxidizing the material in an electrolyte having a concentration of sulfuric acid in the range of about 25 to 100 g per liter and of aluminum ions in the range of about 10 to 25 g per liter, at a current density in the range of about 4 to 25 A/dm2, and a temperature in the range of about 25 to 65°C.

323343

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