Method of forming a composite film over the surface of aluminum

Details Method of forming a composite film over the surface of aluminum Method of forming a composite film over the surface of aluminum

1988-07-18

1990-11-06

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

204376, 204 383, 204 42, C25D 1104, C25D 1122

Patent

active

049683896

ABSTRACT:
A method of forming a coposite film over the surface of aluminum materials, for forming an aluminum oxide film over the surface of an aluminum material, and metal deposits in the aluminum oxide film so as to connect electrically with the aluminum material, in which a voltage is applied to the aluminum material immersed in a sulfuric acid solution to form an aluminum oxide film having pores over the surface of the aluminum material; then the voltage is dropped sharply to near zero while the aluminum material is immersed in the sulfuric acid solution, and a voltage of approximately 0.1 V or less is applied to the aluminum material to dissolve the aluminum oxide film forming the bottoms of the pores; and then the aluminum material coated with the aluminum oxide film is nickel-plated through electroplating to form nickel deposits in the pores of the aluminum oxide film so that the nickel deposts connect electrically with the aluminum material.

REFERENCES:
patent: 3915811 (1975-10-01), Tremmel et al.
patent: 3962049 (1976-06-01), Ueki
patent: 4394415 (1983-07-01), Tsuda
patent: 4548682 (1985-10-01), Yoshida et al.
F. A. Lowenheim, Electroplating, McGraw-Hill Book Co., New York, 1978, pp. 12-16, 465-467.
F. A. Lowenheim, Electroplating, McGraw-Hill Book Co., New York, 1978, pp. 211-212, 460-464.
S. Wernick & R. Pinner, The Surface Treatment and Finishing of Aluminum, Robert Draper Ltd., Teddington, 1964, pp. 260-269.

Affiliated with

Also associated with

Rating

Method of forming a composite film over the surface of aluminum does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of forming a composite film over the surface of aluminum , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of forming a composite film over the surface of aluminum will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1305339