초록 ▼

An article is coated with a multi-layer coating comprising a copper layer, a nickel layer, a chrome layer, a refractory metal layer, preferably zirconium layer, a sandwich layer comprised of alternating layers of a refractory metal compound and a refractory metal, a refractory metal compound layer,

An article is coated with a multi-layer coating comprising a copper layer, a nickel layer, a chrome layer, a refractory metal layer, preferably zirconium layer, a sandwich layer comprised of alternating layers of a refractory metal compound and a refractory metal, a refractory metal compound layer, preferably zirconium nitride layer, and a refractory metal oxide layer or a layer comprised of the reaction products of refractory metal, oxygen and nitrogen. The coating provides the color of polished brass to the article and also provides abrasion protection, corrosion protection, and improved acid resistance.

대표청구항 ▼

[ What is claimed is:] [1.] An article having on at least a portion of its surface a multi-layer protective coating comprising, in order:first layer comprising at least one layer comprised of copper;second layer comprising at least one layer comprised of nickel;third layer comprised of chrome;fourth

[ What is claimed is:] [1.] An article having on at least a portion of its surface a multi-layer protective coating comprising, in order:first layer comprising at least one layer comprised of copper;second layer comprising at least one layer comprised of nickel;third layer comprised of chrome;fourth layer comprised of zirconium, titanium or zirconium-titanium alloy;fifth sandwiched layer comprised of plurality of layers comprised of zirconium compound layer, titanium compound layer or zirconium-titanium alloy compound layer, said compound being selected from the group consisting of nitrides, carbides and carbonitrides, alternating with zirconium layer, titanium layer or zirconium-titanium alloy layer;sixth layer comprised of zirconium compound, titanium compound or zirconium-titanium alloy compound, said compound being selected from the group consisting of nitrides, carbides and carbonitrides; andseventh layer having a thickness at least effective to improve the acid resistance of said coating comprised of zirconium oxide, titanium oxide or zirconium-titanium alloy oxide.