| 摘要 |
PROBLEM TO BE SOLVED: To provide a tube for a heat exchanger excelling in corrosion resistance, and the heat exchanger excelling in corrosion resistance at a joint part of the tube with an external fin while the tube itself and the external fin itself have high corrosion resistance. SOLUTION: The tube for the heat exchanger is connected to the external fin OF made of an Al material with the Cu content less than 0.1 mass%, includes a core material C made of an Al material with the Cu content of 0.15-1.0 mass% and a fusing point of 600°C or higher; a brazing filler metal W made of an Al material with the Cu content less than 0.1 mass% and provided on the core material on the inner surface side of the tube; and a sacrificial anticorrosive material made of an Al material with a fusing point of 600°C or higher and provided on the core material on the outer surface side of the tube. The tube has clearances through which Cu included in the core material during brazing and diffused in fused brazing filler metal oozes out to the outer surface of the tube together with the fused brazing filler metal. COPYRIGHT: (C)2009,JPO&INPIT
|
