Coating processes – With pretreatment of the base – Preapplied reactant or reaction promoter or hardener
Patent
1976-10-04
1978-06-06
Kendall, Ralph S.
Coating processes
With pretreatment of the base
Preapplied reactant or reaction promoter or hardener
427305, 427309, 427437, 427438, 156664, 252 793, 176 82, 148 624, 148 614R, C23C 302
Patent
active
040937569
ABSTRACT:
A process for the electroless deposition of a metal layer on an article comprised of zirconium or a zirconium alloy is disclosed. The article is activated in an aged aqueous solution comprising from about 10 to about 20 grams per liter ammonium bifluoride and from about 0.75 to about 2 grams per liter of sulfuric acid. The solution is aged by immersion of pickled zirconium in the solution for at least about 10 minutes. The loosely adhering film formed on the article in the activating step is removed and the article is contacted with an electroless plating solution containing the metal to be deposited on the article upon sufficient contact with the article.
REFERENCES:
patent: 2928757 (1960-03-01), Lee et al.
patent: 2955061 (1960-10-01), Jenkins et al.
patent: 3029158 (1962-04-01), Lee
patent: 3264219 (1966-10-01), McGrew
patent: 3667991 (1972-06-01), Miller
patent: 3725217 (1973-04-01), Hartshorn
patent: 4017368 (1977-04-01), Wax et al.
General Electric Company
James, Jr. Ivor J.
Kendall Ralph S.
Laub Sam E.
Turner Samuel E.
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