| 摘要 |
PROBLEM TO BE SOLVED: To provide a brazing sheet excellent in corrosion resistance after brazing.SOLUTION: The invention relates to an aluminum alloy brazing sheet having sheet thickness of 0.18 mm or less by cladding a sacrificial material on a single side face of a core material and a brazing material on another side face, where the core material consists of an Al-Mn-Si-based aluminum alloy containing, by mass%, Cu:0.5 to 1.3%, the sacrificial material consists of an aluminum alloy containing, by mass%, Zn:4.0 to 7.0%, Mn:1.0 to 1.8%, Si:0.2 to 1.2% and the balance Al with inevitable impurities, the brazing material consists of an aluminum alloy containing Si:6.0 to 11.0% and Zn:0.1 to 3.0% and the balance Al with inevitable impurities and an area with potential difference from most rare potential of the core material of 100 mV or more is 10% to 50% of the material sheet thickness in a corrosion potential after a brazing heat treatment.SELECTED DRAWING: Figure 4 |
