B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 15/01 (2006.01) B32B 15/18 (2006.01) C23C 18/18 (2006.01) C23C 18/32 (2006.01) C23C 28/02 (2006.01) C25D 5/12 (2006.01) C25D 5/44 (2006.01)
Patent
CA 2107866
IRON-PLATED ALUMINUM ALLOY PARTS AND METHOD FOR PLATING SAME ABSTRACT OF THE DISCLOSURE A process for plating aluminum alloy substrates (10), such as 390 aluminum alloy pistons (12), with iron compris- es (a) plating on the aluminum substrate a layer of zincate from a zincate bath; (b) plating on the zincate layer a layer (14) of nickel from an electroless nickel bath; (c) plating on the nickel layer a layer (16) of iron from an iron ammonium sulfate bath; and (d) plating on the iron layer a layer (18) of tin from an alkaline tin bath. Dur- ing the electroless plating, the zincate layer, which pro- tects the underlying aluminum against oxidation, is sacri- ficed. All of these baths are environmentally much safer than cyanide and chloride. They are also cost effective and can be utilized in a totally closed loop plating sys- tem.
Hughes Aircraft Company
Sim & Mcburney
LandOfFree
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