Chemistry: electrical and wave energy – Processes and products
Patent
1979-07-12
1981-06-02
Prescott, Arthur C.
Chemistry: electrical and wave energy
Processes and products
2041291, 2041415, 219 85R, 219129, C25F 100, C25F 300, C25D 544
Patent
active
042709865
ABSTRACT:
A method and apparatus for soldering aluminum are disclosed. According to the method, the aluminum surface to be soldered is subject to conventional cleaning, then electrolytic cleaning and electrolytic etching, followed by electroplating a very thin layer of nickel on the cleaned and etched surface. The electrolytic cleaning, etching, and plating operations are all carried out by the use of a brush plating tool having an insulated handle portion, to one end of which a wire electrode encased in a porous covering composed of polyester felt is secured.
After the plating has been completed, the surface may be soldered with conventional soft solders and non-corrosive fluxes, using conventional soldering techniques.
REFERENCES:
patent: 3804726 (1974-04-01), Passal
patent: 4042475 (1977-08-01), Bijlmer
patent: 4126523 (1978-11-01), Wong
Morley et al., "The Repair of Aluminum Heat Exchanger", Welding Journal, Oct., 1978, pp. 15-22.
Aluminum Soldering Handbook, 3rd Edition, (1976), Aluminum Association, Inc., New York, N.Y. pp. 12-18.
Prescott Arthur C.
SIFCO Industries, Inc.
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