Abstract: A sacrificial material, which has a cladding material and is laminated on one side of a core material, is made of an aluminum alloy comprising 1.0% to 10.0% by weight of Zn, 0.3% to 0.5% by weight of Si, 0.4% to 3.0% by weight of Ni, and the balance of Al and unavoidable impurities.

Abstract: There is disclosed a sacrificial corrosion-protective aluminum alloy for heat exchangers which contains Zn more than 4.0 wt % but 15.0 wt % or less, 0.1 to 3.0 wt % of Fe, and 0.2 to 3.0 wt % of Ni, with the balance being made of aluminum and unavoidable impurities. There is also disclosed an aluminum alloy composite material in which the said aluminum alloy is used as the sacrificial material and a heat exchanger using the aluminum alloy composite material. According to the aluminum alloy composite material, it is possible to prevent erosion of heat-exchanger tubes when refrigerant in tube is strongly alkaline and is flowing at a high flow rate.

Abstract: This invention relates to a method for producing a metallic catalyst carrier used for a catalytic convertor for an automobile, for example, and calcines a metallic catalyst carrier element obtained by alternately winding or laminating metallic plates in vacuum, and in integrally combining the connecting parts of the metallic plates by diffused junction, the metallic catalyst carrier element being calcines at 1200.degree. C. or above and a pressure of 1 Pa to 10 Pa, preferably l.5 Pa to 10 Pa, to obtain a strong metallic catalyst carrier having oxidization resistance.