Article having a decorative and protective coating simulating brass
AssigneeBaldwin Hardware Corporation
InventorsStephen R. Moysan, III, Rolin W. Sugg
Life of this patent
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Abstract
An article is coated with a multilayer coating comprising a nickel layer deposited on the surface of the article, a nickel-tungsten-boron alloy layer deposited on the nickel layer, and a refractory metal compound, preferably zirconium nitride, deposited on the nickel-tungsten-boron alloy layer. The coating provides the color of polished brass to the article and also provides abrasion and corrosion protection.
Claims22
An article comprising a metallic substrate having disposed on at least a portion of its surface a multi-layer coating simulating brass comprising:
- layer comprised of semi-bright nickel;
- layer comprised of bright nickel;
- metallic layer comprised of substantially amorphous nickel-tungsten-boron alloy containing at least about 0.05 weight percent boron;
- and
- a top layer comprised of zirconium compound or titanium compound.
An article comprising a metallic substrate having on at least a portion of its surface a multi-layered coating having a brass color comprising
- a first layer comprised of semi-bright nickel;
- a second layer on at least a portion of said first layer comprised of bright nickel;
- a third metallic layer on at least a portion of said second layer comprised of substantially amorphous nickel-tungsten-boron alloy containing at least about 0.05 weight percent boron;
- and
- a top layer on at least a portion of said fourth layer comprised of a zirconium compound or titanium compound.
An article comprising a metallic substrate having disposed on at least a portion of its surface a multi-layer coating comprising:
- layer comprised of semi-bright nickel;
- layer comprised of bright nickel;
- metallic layer comprised of substantially amorphous nickel-tungsten-boron alloy containing at least about 0.05 weight percent boron;
- and
- a top layer comprised of zirconium compound or titanium compound.
An article comprising a metallic substrate having on at least a portion of its surface a multi-layered coating comprising a first layer comprised of semi-bright nickel;
- a second layer on at least a portion of said first layer comprised of bright nickel;
- a third metallic layer on at least a portion of said second layer comprised of substantially amorphous nickel-tungsten-boron alloy containing at least about 0.05 weight percent boron;
- and
- a top layer on at least a portion of said third layer comprised of a zirconium compound or titanium compound.
Dependencies are inferred from the claim text.