Aluminum heat exchanger and manufacturing method thereof

摘要

A sheet material for the tube 10 includes: a core material 10 b; and a sacrifical corrosion material 10 c clad on one face of the core material 10 b which becomes an outside of the tube 10 . A sheet material for the fin is a bare aluminum material on which a brazing filler metal is not clad. A mixture composition 10 e, in which powder of a brazing filler metal and flux are mixed with each other, is coated on the outside of the tube 10 . The tube 10 and the fin are brazed to each other with this mixture composition 10e. Even after the completion of brazing, the sacrifical corrosion material 10 c remains on the outside of the tube 10.