Method of making a corrosion resistant aluminum heat exchanger u

Details Method of making a corrosion resistant aluminum heat exchanger u Method of making a corrosion resistant aluminum heat exchanger u

1986-02-12

1989-05-23

Goldberg, Howard N.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

228183, B21D 3302

Patent

active

048317012

ABSTRACT:
A method of treating a heat exchanger made of aluminum or an aluminum alloy comprising applying onto the surface of the aluminum heat exchanger a noncorrosive flux having a flux core with an outer coating of zinc or a zinc alloy formed by vacuum vapor deposition or ion plating, and then heating the resulting heat exchanger to effect brazing. A diffused zinc layer forms on the surface of the heat exchanger and protects it from corrosion, in particular, from electrolytic corrosion.

REFERENCES:
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patent: 4358485 (1982-11-01), Kern et al.
patent: 4579605 (1986-04-01), Kawase et al.
patent: 4619715 (1986-10-01), Hwang
Metal Handbood, 8th Ed., vol. 6, Welding and Brazing: Brazing of Aluminum Alloys, American Society for Metals, 1971, pp. 675-684.

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