Non-chromium containing black multi-layer coatings

Details Non-chromium containing black multi-layer coatings Non-chromium containing black multi-layer coatings

2007-10-26

2009-06-02

Speer, Timothy M (Department: 1794)

Stock material or miscellaneous articles

Composite

Of silicon containing

C428S632000, C428S633000, C428S680000, C428S450000

Reexamination Certificate

active

07541095

ABSTRACT:
The disclosed invention relates to black multi-layer coatings for metallic substrates (1) or substrates having a metallic coating (2) and to articles covered, or partially covered with such coatings. The black coating consists of a black first layer (3) substantially comprised of nickel and a second polymeric silicate inorganic layer (4). The present invention may additionally have a third layer comprised substantially of organic constituents (5). This invention offers properties currently unavailable or insufficient in existing technologies. The present invention provides enhanced corrosion resistant, adherent black coatings which are thin enough to allow application to fasteners while providing a uniform black color, the combination of which have only been available previously with the use of hexavalent or trivalent chromium conversion coatings.

REFERENCES:
patent: 5023146 (1991-06-01), Saito et al.
patent: 6376022 (2002-04-01), Mallow et al.
patent: 2006/0228569 (2006-10-01), Kojima et al.
patent: 03/021009 (2003-03-01), None
International Search Report from corresponding International Application No. PCT/US 07/82693, mailed Mar. 6, 2008.
Written Opinion from corresponding International Application No. PCT/US 07/82693, mailed Mar. 6, 2008.

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