ALUMINUM ALLOY BRAZING SHEET FOR HEAT EXCHANGER HAVING EXCELLENT CORROSION RESISTANCE AND METHOD OF PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To obtain characteristics excellent in corrosion resistance as for an aluminum alloy brazing sheet for a heat exchanger. SOLUTION: The aluminum alloy brazing sheet is obtained by cladding an aluminum alloy brazing filler metal on one side of a core material consisting of an aluminum alloy, and cladding a sacrificial anode material on the other side. The sacrificial anode material consists of an aluminum alloy comprising elements forming an intermetallic compound nobler than the matrix of the sacrificial anode material, and the balance Al with inevitable impurities. The intermetallic compound having a particle diameter (the diameter of the equivalent circle) of 0.5 to 0.9μm is allowed to exist by 2×103to 2×105pieces per mm2in the matrix. COPYRIGHT: (C)2004,JPO