초록 ▼

A copper alloy plumbing fixture containing interdispersed lead particles coated non-continuously on a water contact surface to resist the leaching of lead into potable water systems. The leach resistant fixture is prepared by immersing conventional copper alloys in a bismuth nitrate solution, select

A copper alloy plumbing fixture containing interdispersed lead particles coated non-continuously on a water contact surface to resist the leaching of lead into potable water systems. The leach resistant fixture is prepared by immersing conventional copper alloys in a bismuth nitrate solution, selectively and non-continuously coating the lead dispersoid particles on the water contact surface with bismuth, tin or copper.

대표청구항 ▼

[ What is claimed is:] [30.] An article for use in fluid containment and transportation, said article comprising:a flow directing piece shaped to provide a fluid flow conduit, said flow directing piece having an exterior surface, said exterior surface including a fluid contact surface adjacent said

[ What is claimed is:] [30.] An article for use in fluid containment and transportation, said article comprising:a flow directing piece shaped to provide a fluid flow conduit, said flow directing piece having an exterior surface, said exterior surface including a fluid contact surface adjacent said fluid flow conduit;a perimeter portion of said flow directing piece comprising said exterior surface, said perimeter portion extending to a depth of smaller than about 50-100 microns into said flow directing piece from said exterior surface, said perimeter portion comprising lead;an interior portion of said flow directing piece surrounded by said exterior portion, said interior portion comprising lead; anda lead leach inhibitor in said flow directing piece, said perimeter portion having an average concentration of lead leach inhibitor that is greater than the average concentration of lead leach inhibitor in said interior portion.