Vacuum brazing technology is currently capable of producting aluminum automotive heat exchangers such as radiators and heater cores. The possible use of 7072 claddings on the surfaces exposed to the coolant to provide additional corrosion protection is of considerable interest. This paper describes the effect of typical vacuum brazing cycles on the distribution of zinc in 7072 clad vacuum brazing sheet. For heavier gauges (05 in.), there is sufficient retained zinc in the post-braze composite. For lighter gauges (.02 in. or less), nominal composition 7072 does not provide adequate retained zinc; however, if the initial zinc concentration is increased to 3 % there is sufficient retained zinc so that the cladding is significantly more anodic than the core. (Kursetz)


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    Title :

    Zinc distribution in vacuum brazed alclad brazing sheet


    Additional title:

    Die Zinkverteilung beim Vakuumofenloeten von plattierten Alclad-Blechen


    Contributors:

    Published in:

    Publication date :

    1978


    Size :

    7 Seiten, 10 Bilder, 3 Tabellen, 1 Quelle


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English