Process for anodically oxidizing aluminum and use of the materia

Details Process for anodically oxidizing aluminum and use of the materia Process for anodically oxidizing aluminum and use of the materia

1979-03-13

1980-07-08

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

204 38A, 204 58, C25D 1116, C25D 1118

Patent

active

042116198

ABSTRACT:
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 roughening, 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/dm.sup.2, and a temperature in the range of about 25.degree. to 65.degree. C.

REFERENCES:
patent: 3902976 (1975-09-01), Walls
patent: 3935080 (1976-01-01), Gumbinner
patent: 4144142 (1979-03-01), Takahashi

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