| abstract |
The present invention provides a kind of corrosion resistance excellent of soldered joint part and suitable for the aluminum alloy heat exchanger of the purposes such as air-conditioning.Collector includes aluminium alloy lining material, the sacrificial anode material which has the core material of aluminium alloy and be coated on a face of core material.Core material contain the Mn of 0.3 mass of mass %~2.0 % (hereinafter referred to as %), 1.5% Si below, 0.1%~1.0% Fe and 0.05%~1.0% Cu, and remainder includes Al and inevitable impurity, sacrificial anode material contains 0.05%~1.0% Fe and 0.5%~5.0% Zn, and remainder includes Al and inevitable impurity.Collector 30mV low compared with the current potential of the current potential of manifold and pipe surface with the current potential at the joint portion of pipeline hereinafter, joint portion current potential compared with collector the low 30mV~100mV of current potential of the position of total thickness a quarter from surface of the current potential and pipeline of the position of total thickness a quarter from surface. |