BRIGHT ELECTROLESS PLATING PROCESS PRODUCING TWO-LAYER NICKEL COATINGS ON DIELECTRIC SUBSTRATES

摘要

BRIGHT ELECTROLESS PLATING PROCESS An adherent, bright metallic nickel coating is applied to the surface of a plastic or other dielectric part (or to a metal part) by an electroless process comprising, after suitable pretreatment of said surface, the deposition of a PRIMARY electroless nickel possessing special properties followed by a SECONDARY electroless nickel of bright appearance WITH COMPLETE ELIMINATION OF ANY SUBSEQUENT ELECTROPLATING PROCESS usually required to achieve this brightness. The nickel coating may be limited to selected surface areas of a coated part by mechanically removing portions of the primary coat prior to immersion of the part in a secondary electroless nickel bath.