Surface-coated article and a method for the preparation thereof

Details Surface-coated article and a method for the preparation thereof Surface-coated article and a method for the preparation thereof

1988-05-23

1990-03-06

Herbert, Thomas J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428457, 428469, 428701, B32B 1504, B32B 1508

Patent

active

049065246

ABSTRACT:
A metal shaped article, of which aesthetic value is of importance, such as watch cases, is provided with a coating layer of a ceramic composition containing a limited amount of magnesium oxide as an essential ingredient, the balance being silicon dioxide, aluminum oxide, titanium dioxide and the like, and having a limited thickness. The ceramic-based coating layer can be deposited on the substrate surface by a dry process such as ion plating. The substrate article can be provided with excellent protection against abrasion and corrosion by the ceramic-based coating layer without affecting the beautiful appearance of the substrate surface only when the ceramic composition contains the specified amount of magnesium oxide and the ceramic-based coating layer has a specified thickness.

REFERENCES:
patent: 3026210 (1962-03-01), Cobb
patent: 4517217 (1985-05-01), Hoffman
patent: 4659629 (1987-04-01), Gartner et al.
patent: 4689270 (1987-08-01), Deckelmann et al.
patent: 4689271 (1987-08-01), Schittenhelm et al.
patent: 4704328 (1987-11-01), Imao et al.
patent: 4720419 (1988-01-01), Cairns
patent: 4726983 (1988-02-01), Harada et al.

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