Method for the currentless catalytic precipitation of aluminum

Details Method for the currentless catalytic precipitation of aluminum Method for the currentless catalytic precipitation of aluminum

1977-08-01

1979-03-13

Esposito, Michael F.

Coating processes

Electrical product produced

Metal coating

427 58, 427304, 427352, 427436, 106 111, 106 125, C23C 302

Patent

active

041443608

ABSTRACT:
The invention relates to a method for the currentless catalytic precipitation of aluminum. The surface of insulating and conductive materials (substrates) to be aluminized is (1) catalyzed, while a film-forming moisture-insensitive layer is developed, with a compound active at the boundary surfaces, by a brief immersion in a dilute solution of (a) a modified ester or acylate of titanium, zirconium or vanadium, substituted at the metal atom with short- and long-chain organic radicals or (b), a chloride of the transition metals of the IV and V secondary group of the periodic system of the elements and a water-containing metal soap of a polyvalent metal, preferably aluminum soaps; (2) is intensively rinsed with aprotic solvents, preferably having a boiling point of over 100.degree. C.; and (3) is immersed in a 1 to 4% solution of trialkylaminalanes in a solvent mixture of aromatic and highly viscous aliphatic compounds. A homogeneous and strongly adhering aluminum coating is thereby obtained.
Insulating and conductive materials and components, e.g., electronic components and reflectors can in this manner be homogeneously coated with strongly adherent aluminum.

REFERENCES:
patent: 3537878 (1970-11-01), Baudrand
patent: 3639139 (1972-02-01), Schneggenburger
patent: 3963841 (1976-06-01), Anschel

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