Decorative and protective coating

Details Decorative and protective coating Decorative and protective coating

2007-02-20

2007-02-20

McNeil, Jennifer (Department: 1775)

Stock material or miscellaneous articles

Composite

Of inorganic material

C428S699000, C428S701000, C428S702000

Reexamination Certificate

active

11004202

ABSTRACT:
An article is coated with a multi-layer coating having the appearance of brass, nickel and stainless steel. The coating comprises a nickel or polymer base coat on the surface of said article, a chromium layer and vapor deposited on the chromium layer, a refractory metal nitride or nitride and oxide, or refractory metal alloy nitride or nitride and oxide that mimic the colors of brass, nickel and stainless steel. An oxide-containing strike layer comprised of nano-sized refractory metal crystals and/or preferentially oriented refractory metal phase with the refractory oxide for precipitation hardening. A refractory oxide layer intermediate the refractory metal strike layer and the stack layer comprised of alternative layers of refractory metal, substoichiometric refractory nitride and stoichiometric refractory nitride. This intermediate oxide layer acts as a non-conductive barrier to improve corrosion and pitting resistance. An ultra-thin refractory oxide top layer to provide further protection against corrosion.

REFERENCES:
patent: 4101703 (1978-07-01), Schintlmeister
patent: 5879532 (1999-03-01), Foster et al.
patent: 6168242 (2001-01-01), Mokerji
patent: 6196936 (2001-03-01), Meckel
patent: 6399219 (2002-06-01), Welty et al.
patent: 6743532 (2004-06-01), Chen
patent: 2004/0142205 (2004-07-01), Chen et al.
patent: 2004/0142213 (2004-07-01), Chen et al.

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