ALUMINUM-ALLOY SHEET MATERIAL FOR RADIATOR TUBE EXCELLENT IN BRAZING PROPERTY, AND RADIATOR TUBE AND HEAT EXCHANGER HAVING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an aluminum-alloy sheet material for radiator tube which has excellent brazing property and in which corrosion resistance and brazing property can be simultaneously improved and also to provide a radiator tube and a heat exchanger having the same.;SOLUTION: One surface 2a of a base material 2 composed of aluminum alloy is provided with a brazing filler metal layer 3 formed by applying a composition for brazing containing Si powder, fluoride-based flux and binder. The particle size of the Si powder ranges from 4 to 10μm, and the particle size of all the particles constituting the fluoride-based flux is ≤10μm. The other surface 2b of the aluminum-alloy base material 2 is provided with a sacrificial material layer 4 formed by applying a Zn-containing sacrificial material. By this method, the aluminum-alloy sheet material 1 for radiator tube which has the excellent brazing property on the one surface 2a side and high corrosion resistance on the other surface 2b side can be obtained.;COPYRIGHT: (C)2007,JPO&INPIT