Prevention of Zinc Sublimation from Alclad Vacuum Brazing Sheet by Calcium Addition to 7072 Cladding 800799
7072 alclad sheet has long been applied for aluminum heat exchanger components because of the excellent cathodic protection.
However, the sacrificial anode effect of 7072 cladding would be impaired by zinc sublimation during vacuum brazing cycles.
This paper describes the effect of additional calcium to 7072 cladding on zinc sublimation in vacuum brazed alclad sheet.
For lighter gauge (0.4 mm), 7072 cladding does not provide adequate retained zinc after vacuum brazing, but 7072 cladding with calcium will have sufficient retained zinc to afford galvanic protection to the core.
Citation: Kawase, H. and Tanaka, T., "Prevention of Zinc Sublimation from Alclad Vacuum Brazing Sheet by Calcium Addition to 7072 Cladding," SAE Technical Paper 800799, 1980, https://doi.org/10.4271/800799. Download Citation
Author(s):
Hiroshi Kawase, Takakazu Tanaka
Affiliated:
Furukawa Aluminum Co., Ltd.
Pages: 11
Event:
Passenger Car Meeting & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Heat exchangers
Joining
Calcium
Aluminum
Vacuum
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »
