METHOD FOR IMPARTING TARNISH PROTECTION OR TARNISH PROTECTION WITH COLOR APPEARANCE TO SILVER, SILVER ALLOYS, SILVER FILMS, SILVER PRODUCTS AND OTHER NON-PRECIOUS METALS

摘要

A method of surface coating a metallic object, including removing substantially all of the existing silver sulfide tarnish if present, ultrasonically cleaning the object with immersion in a solvent, uniformly dispersing selected nanoparticles over the surface of the object by sonicating the object in an ultrasonic bath containing the selected nanoparticles. The invention further includes quickly rinsing the object with solvent upon removal from the ultrasonic bath to inhibit formation of large agglomerates, drying the object with a flow of gas, optically inspecting the object for the presence of agglomeration and applying a barrier layer conformal coating and a protective layer conformal coating.

主权项

1. An object, comprising:
a substrate; a uniformly dispersed layer of selected nanoparticles covering the surface of the object; a barrier layer conformal coating overlying the dispersed layer of selected nanoparticles selected from a group consisting of oxides, oxynitrides, nitrides, carbides, metals, metal alloys, metal compounds, combinations of organic/inorganic complex compounds and stacks thereof; and a protective layer conformal coating.