Silverplate is used to describe a layer of silver, which is bonded to base metals.

A manufacturing process in which pure silver is electroplated onto a base metal, usually brass or pewter.

Method of electrically depositing a layer of silver.

Silverplate was the code reference for the United States Army Air Forces participation in the Manhattan Project during World War II. Originally the name for the aircraft modification project for the B-29 Superfortress to enable it to drop an atomic weapon, Silverplate eventually came to identify the training and operational aspects of the program as well. The airplane modification project fell under the purview of Project Alberta after March 1945.

plate with silver; "silverplate a watch"

Objects that are subjected to the plating process in order to resemble genuine silver.

a base metal -- usually an alloy of nickel, copper, and zinc -- which is plated with silver.