Process for the soldering of the cooler assembly to automobile r

Details Process for the soldering of the cooler assembly to automobile r Process for the soldering of the cooler assembly to automobile r

1975-09-12

1977-07-26

Smith, Al Lawrence

Metal fusion bonding

Process

Plural joints

228206, 228214, 228242, B23K 102

Patent

active

040377741

ABSTRACT:
An improved method is disclosed for the soldering together of the cooling assembly of automobile radiators wherein aluminum fins, a first part of the cooling assembly, are etched in a solution consisting essentially of 10 to 14% sodium hydroxide, 4 to 7% zinc cyanide, 20 to 30% technical urea with the balance water for a period of 15 to 30 seconds at a temperature of 32 .degree. to 60.degree. C prior to undergoing treatment with a protective coating and eventual soldering to cooling pipes made of copper, brass, steel or aluminum, the remainder of the cooling assembly.

REFERENCES:
patent: 2791553 (1957-05-01), Connor et al.
patent: 3631588 (1972-01-01), Barozzi

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