| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum alloy-made fin material including corrosion resistance in addition to the strength and heat conductivity after brazing.SOLUTION: A core material 21 contains one or two kinds of 0.80-2.0% Fe and 0.2-1.5% Ni, and if necessary, 0.1-5.0% Zn and the balance Al with inevitable impurities, and a brazing material 31, which contains 5.0-12.5% Si, 0.1-5.0% Zn, 0.01-0.05% Sr and the balance Al with inevitable impurities, is cladded on one surface or both surfaces thereof. Furthermore, in order to improve the adhesion between an organic system corrosion-proof coating and a plate fin material, a dispersion state of a metal compound is suitably controlled so that intermetallic compounds, having 1.0-5.0 μm of the circular equivalent diameter, exist in 10-10pieces/mmof the number density on the surface 31a of the brazing material 31. |
