| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve corrosion resistance of a tube by utilizing sacrificial corrosive action of fins to the whole tubes. <P>SOLUTION: The heat exchanger 10 made of aluminum alloy is formed by joining a header tank 4 to longitudinal end sections of the plurality of tubes 2 by brazing, the tubes 2 having corrosion resistance by sacrificial corrosive action of the fins 3 disposed among the plurality of tubes 2. As an aluminum alloy clad material for the header tank to be used in forming the header tank 4, the aluminum alloy in which a brazing material has a Si content rate of 3.5-5.0 wt.% is used. A distance L1 between the header tank 4 and the fin 3 is set to be 0-4 mm, which is shorter than a conventional one. As a result, the sacrificial corrosive action of the fins 3 can be utilized in the whole tubes, and the corrosion resistance of the tubes can be improved. <P>COPYRIGHT: (C)2012,JPO&INPIT |
