| 摘要 |
PROBLEM TO BE SOLVED: To provide a clad plate with a three-layered structure which has excellent corrosion resistance to an alkalescent coolant or inferior water and excellent brazing properties under heating, and also has high strength. SOLUTION: In the clad plate with the three-layered structure, a brazing filler metal of an aluminum alloy containing 6 to 13% Si and 0.005 to 0.1% Sr is clad on one side of a core material of an Al alloy containing 0.3 to 2.0% Mn, 0.1 to 1.0% Cu and 0.3 to 2.0% Si; and a sacrificial anode material of an Al alloy containing 1 to 10% Zn, 0.3 to 0.5% Si and 0.5 to 3.0% Ni is clad on the other side. The brazing filler metal can contain≤2.0% Mg in addition to the above chemical composition. The sacrificial anode material contains one or two kinds of metals selected from 0.001 to 0.05% In and 0.001 to 0.05% Sn, or≤4.0% Mg, or 0.15 to 2.0% Fe in addition to the chemical composition. The core material may contain≤0.5% Mg in addition to the above chemical composition. COPYRIGHT: (C)2004,JPO
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