Accession Number : AD0635647

Title :   ON ANODIC OXIDATION OF ALUMINUM IN CHROMIC ACID.

Corporate Author : INSTITUTE OF MODERN LANGUAGES INC WASHINGTON D C

Personal Author(s) : Modic, F.

Report Date : JUN 1966

Pagination or Media Count : 35

Abstract : Particular attention was here given to working with bath temperatures above 45 degrees C. Oxide films are here formed much quicker than with the earlier low bath temperatures and are characterized by an attractive and completely opaque appearance. They can also be dyed relatively quickly in saturated tints. They thus become highly suitable for decorative purposes which was not the case in the past. The report also discusses in detail the influence of impurity anions in the chromic acid bath and specifically the effect of sulfate ions on the opaqueness of the anodized items. It further makes suggestions on the control of the bath and/or possibilities of regeneration in the chromic acid process and gives some indications in regard to cost calculation. (Author)

Descriptors :   (*ANODIC COATINGS, *ALUMINUM), OXIDATION, CHROMIC ACID, DIRECT CURRENT, PROCESSING, WEST GERMANY

Subject Categories : Coatings, Colorants and Finishes
      Metallurgy and Metallography
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE