Patent ID: 6258415
Filing Date: 2001-07-10
Classification: C23C,C25D,Y10S,Y10T

Abstract:
A process for plating aluminum alloy substrates with iron consisting of the following steps, each step followed by a water rinse:(a) treating said aluminum substrate with a zincate bath to deposit an immersion layer of zinc metal thereon;(b) plating on said zincate-treated aluminum surface a layer of nickel from an electroless nickel bath;(c) electroplating on said nickel layer a layer of iron from an iron sulfate bath; and(d) electroplating on said iron layer a layer of tin from an alkaline tin bath,wherein said electroless nickel bath supersedes a copper cyanide bath and said iron sulfate bath supersedes an iron chloride bath, said electroless nickel bath and said iron sulfate bath as a first combination being substantially less toxic than said copper cyanide bath and said iron chloride bath as a second combination.