| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a brazing sheet composed of an aluminum alloy for a heat exchanger having excellent pitting corrosion resistance and sufficient strength, and to provide a heat exchanger. <P>SOLUTION: In the brazing sheet 1, a sacrificial anode material 3 is pasted on one side 2a in an aluminum alloy core material 2, further, a brazing filler metal 4 is pasted on the other side 2b, the sacrificial anode material 3 is composed of an internal sacrificial anode layer 3a and an external anode sacrificial layer 3b, the potential of the external sacrificial anode layer 3b is made baser than that of the internal sacrificial anode layer 3a, the Zn content in the external sacrificial anode layer 3a is higher than that in the internal sacrificial anode layer 3b, the internal sacrificial anode layer 3a comprises 0.1 to 4.0 wt.% Zn, and further, the external sacrificial anode layer 3b comprises 2.0 to 10.0 wt.% Zn. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
