Brazing of aluminium automotive heat exchangers with NOCOLOK non corrosive flux is well established throughout theworld. A modification of this, results in substantially improved corrosion resistance. It is based on the controlled introduction of dry air into an inert atmosphere brazing furnaces soon after the completion of the braze. Separately, the use of CO2 as the oxidant in a similar cycle, produces black surfaces. The feasibility of both processes has been demonstrated on radiators, condensers and oil coolers in a laboratory batch furnace.
A modification of the NOCOLOK flux brazing process to produce superior corrosion resistance or black surfaces
Modifizierung des NOCOLOK-Hartlötverfahrens mit Flußmittel zur Verbesserung der Korrosionsbeständigkeit von schwarzen Oberflächen
SAE-Papers ; Mar ; 1-10
1990
10 Seiten, 14 Bilder, 2 Tabellen, 10 Quellen
Aufsatz (Konferenz)
Englisch
NOCOLOK Flux and Aluminum Brazing
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