| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum alloy cladding material which can maintain high corrosion resistance even when it is made thinner.SOLUTION: An aluminum alloy cladding material 1 includes a core material S, a first skin material G cladded on one surface of the core material S, and a film F formed on a surface of the first skin material G. The core material S is structured of an aluminum alloy consisting of 0.30-1.50 mass% Si, 0.60-2.00 mass% Mn, 0.10-2.50 mass% Cu, 0.05-0.50 mass% Ti, 0.01-0.50 mass% Fe and the balance Al with inevitable impurities. The first skin material G is an oxyhydroxide film which is structured of an Al-Zn alloy containing 2.0-12.0 mass% Zn, satisfies at least either of a cladding ratio of 1.0% or higher, or a thickness of the first skin material G of 5.0 μm or more, has a thickness of the coating F of 0.1-10 μm, and contains 70% or more boehmite.SELECTED DRAWING: Figure 1 |
