Aluminium articles having anodic oxide coatings and methods of c

Details Aluminium articles having anodic oxide coatings and methods of c Aluminium articles having anodic oxide coatings and methods of c

1980-04-17

1982-01-12

Davis, Curtis R.

Stock material or miscellaneous articles

Structurally defined web or sheet

Physical dimension specified

204 35N, 204 42, 204 58, 428336, 428469, C25D 1112, C25D 1122

Patent

active

043105866

ABSTRACT:
The invention provides aluminium articles having porous anodic oxide films colored by means of an optical interference effect. In FIG. 4, the article 10 carries a first anodic oxide film 12 with pores 14 enlarged at their inner ends 20 and containing deposits 22. The products may be made by growing a second anodic oxide film 26 underneath the deposits 22 which are preferably of acid-resistant material. X is at least 26 nm, Y is preferably at least 60 nm, Z is preferably 15 nm to 200 nm, (Y+Z) is preferably 75 nm to 600 nm, and W is preferably at least 15 nm.

REFERENCES:
patent: 3634208 (1972-01-01), Kuroda
patent: 3664932 (1972-05-01), Patrie
patent: 3787295 (1974-01-01), Endinger et al.
patent: 3915813 (1975-10-01), Abe et al.
patent: 4042468 (1977-08-01), Hasegawa et al.
patent: 4066516 (1978-01-01), Sato
patent: 4066816 (1978-01-01), Sheasby et al.
Walter Hubner and A. Schiltknecht, The Practical Anodizing of Aluminum, MacDonald and Evans, London, 1960, pp. 21-26.

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