HIGHLY CORROSION-RESISTANT ALUMINIUM ALLOY BRAZING SHEET, AND FLOW CHANNEL FORMING COMPONENT WHICH IS FOR VEHICLE HEAT EXCHANGER AND WHICH USES SAID BRAZING SHEET

摘要

The present invention addresses the issues of: providing a highly corrosion-resistant aluminium alloy brazing sheet which has sacrificial corrosion resistance properties on both surfaces thereof, has brazing capability on one surface thereof, and prevents the occurrence of preferential corrosion; and providing a flow channel forming component which is for a vehicle heat exchanger and which uses the aluminium alloy brazing sheet. The above issue is resolved by means of: a highly corrosion-resistant aluminium alloy brazing sheet which is provided with an aluminium alloy core material, an aluminium alloy brazing material which is clad to one surface of the core material, and an aluminium alloy sacrificial anode material which is clad to the other surface of the core material, the aluminium alloy brazing sheet being a combination of the brazing material which includes specific amounts of each of Si, Zn, Cu and Fe, the sacrificial anode material which includes specific amounts of each of Zn, Si and Fe, and the core material which includes specific amounts of each of Si, Fe, Cu and Mn; and a flow channel forming component which is for a vehicle heat exchanger and which uses the aluminium alloy brazing sheet.