Sacrifice anode material surface slowly due to attaching are superior in the interview affinity clad to do the brazing filler metal on the aspect

摘要

PROBLEM TO BE SOLVED: To provide an aluminum alloy clad material which can suitably be used as an aluminum alloy-made heat exchanger, especially a tube material, header plate material in the heat exchanger for automobile and gives excellent corrosion resistance by displaying sufficient corrosion preventive effect as a sacrificial anode material and has excellent surface joinability by brazing on the sacrificial anode material surface.;SOLUTION: In the aluminum alloy clad material cladded with the sacrificial anode material, the sacrificial anode material is composed of 0.5-5% Zn, 0.1-0.4% Fe, 0.01-1.2% Si, 0.1-2.0% Mn and the balance Al with inevitable impurities, and if heating the aluminum clad material under conditions of 50°C/min temperature-raising speed till heating to 400°C and within 30min as reaching time till heating to 595°C, a crystal grain size on the surface of the sacrificial anode material is 0.08-0.20mm.;COPYRIGHT: (C)2007,JPO&INPIT