Method for improving the fillet-forming capability of aluminum v

Details Method for improving the fillet-forming capability of aluminum v Method for improving the fillet-forming capability of aluminum v

1991-04-16

1992-04-07

Seidel, Richard K.

Metal fusion bonding

Process

Critical work component, temperature, or pressure

228206, 228183, 29890054, 156665, B23K 35363, B23K10114, B23K10310

Patent

active

051020335

ABSTRACT:
The fillet-forming ability of brazeable aluminum alloy materials, such as brazing sheet or heat exchanger components, for example fins, tubes and headers, is significantly improved by treating the material, prior to brazing, with an aqueous acid solution containing a dilute mixture of HF and HNO.sub.3. The treatment generally takes place for a period of not less than 5 seconds within the temperature range from about 15 to about 98.degree. C.

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Metals Handbook, 9th ed., vol. 6, "Welding Brazing and Soldering", 1983, pp. 1025, 1029.

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