| 主权项 |
1. A process for coating a surface of a substrate made of nonmetallic material with a metal layer, characterized in that it consists of the following steps:
a. providing a substrate made of nonmetallic material; b. subjecting at least part of at least one surface of said substrate to a physical or chemical treatment for increasing the specific surface area thereof; c. subjecting the surface of said substrate that was treated in step b) to an oxidizing treatment, or alternatively, performing steps b) and c) in a single step b′) that is an oxidizing treatment; d. bringing the surface of said substrate that was treated in step c) or b′) into contact with a solution containing at least one ion of at least one metal and its counterion, said metal being chosen from the group constituted of the metals of groups IB and VIII of the Periodic Table of the Elements, and the solution being a basic solution; e. obtaining a substrate comprising ions of at least one metal that are chemically attached to the nonmetallic material constituting the substrate on at least one part of at least one of its surfaces; f. subjecting said ions of at least one metal that are chemically attached to the nonmetallic material constituting the substrate on a surface of said substrate to a reducing treatment and obtaining a substrate comprising atoms of at least one metal that are chemically attached to the nonmetallic material constituting the substrate on at least one part of at least one of its surfaces; g. bringing the surface comprising particles of at least one metal which was obtained in step f) into contact with a solution containing ions of at least one metal, or alternatively, carrying out steps f) and g) as a single step f′); h. obtaining a coating formed by a layer of at least one metal on the treated surface of said substrate,
said steps being optionally followed or preceded by one or more rinsing steps. |
