Coating processes – Immersion or partial immersion – Metal base
Patent
1992-09-04
1994-04-19
Beck, Shrive
Coating processes
Immersion or partial immersion
Metal base
427304, 427305, 427438, 4274431, C23C 2600
Patent
active
053044037
ABSTRACT:
In a preferred method, a zinc-rich alloy coating is applied to a substrate using an electrolysis deposition solution which contains a metal salt of zinc and a metal salt of nickel each in an amount sufficient to provide a weight ratio of zinc to nickel (Zn:Ni) of at least about 1:1; a phosphorus-containing reducing agent in an amount sufficient to cause reduction of the zinc and the nickel to ions thereof; sufficient complexing agent to maintain the nickel ions and the zinc ions in solution; and a buffer in an amount sufficient to achieve a desired pH. Preferably, the surface of the substrate is pretreated or precatalyzed before deposition by a sensitizing step using tin and an activating step using palladium.
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Abstracts from 1991 American Chemical Society database for German Pat. No. 2747001 and Japanese Patent Nos. 57-12592 and 62-274076.
Schlesinger Mordechay
Snyder Dexter D.
Beck Shrive
Dang Vi Duong
General Moors Corporation
Plant Lawrence B.
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