White decorative part and process for producing the same

Details White decorative part and process for producing the same White decorative part and process for producing the same

1997-10-14

1999-11-16

Zimmerman, John J.

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

428672, 428938, 20429813, B32B 1504, C23C 1406

Patent

active

059854693

ABSTRACT:
A white decorative part comprising: a substrate, a white hard coating formed on the substrate according to a dry plating process, and an outermost coating formed on the white hard coating according to a dry plating process, wherein the white hard coating is composed of either a nitride, a carbide, an oxide or a carbonitride of at least one element selected from among Ti, Hf, Zr, Ta, V, Cr and Al or Ti, and wherein the outermost coating is composed of an alloy of gold and any of nickel, tantalum, cobalt, palladium, silver, rhodium, titanium and iron, the proportion of the gold to the outermost coating ranging from 30 to 80 atomic % while the proportion of the nickel, tantalum, cobalt, palladium, silver, rhodium, titanium or iron to the outermost coating ranges to 20 to 70 atomic %. Further, a process for producing the white decorative part. This white decorative part has a uniform white tone of high lightness and warmth, is excellent in the adhesion between the outermost coating and the substrate and ensures an appearance of superior quality. When the outermost coating is composed of a gold-titanium or gold-iron alloy, the white decorative part is free from causing any metal allergy to the skin.

REFERENCES:
patent: 4226082 (1980-10-01), Nishida
patent: 4252862 (1981-02-01), Nishida
patent: 4403014 (1983-09-01), Bergmann
patent: 4699850 (1987-10-01), Kishi et al.
patent: 4745035 (1988-05-01), Savrer et al.
patent: 4791017 (1988-12-01), Hofmann et al.

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