Preparation of electroless nickel coating having improved proper

Details Preparation of electroless nickel coating having improved proper Preparation of electroless nickel coating having improved proper

1994-01-26

1995-03-14

Beck, Shrive

Coating processes

With pretreatment of the base

Preapplied reactant or reaction promoter or hardener

427304, 427305, 4274431, B05D 100

Patent

active

053975995

ABSTRACT:
Increases in surface resistivity of electroless nickel coatings on polycarbonate-containing substrates are inhibited by employing two electroless nickel plating solutions. The first solution is one which deposits a metal layer containing phosphorus, if any, in an amount up to 5% by weight and is used to deposit a layer at least 0.5 micron thick. The second solution is one which deposits a layer containing phosphorus in the amount of at least 5% and preferably at least 6% by weight. Another metal layer may be interposed between the two nickel layers.

REFERENCES:
patent: 3385725 (1968-05-01), Schmeckenbecher
patent: 3620804 (1971-11-01), Bauer
patent: 4160049 (1979-07-01), Narcus
patent: 4217438 (1980-08-01), Brunelle
patent: 4272584 (1981-06-01), Goldberg
patent: 4830889 (1989-05-01), Henry
patent: 4940608 (1990-07-01), Kawagishi
patent: 5132191 (1992-07-01), Zarnoch
patent: 5198096 (1993-03-01), Foust
patent: 5229169 (1993-07-01), Chao

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