ALUMINUM ALLOY THIN PLATE FOR HEAT EXCHANGER EXCELLENT IN HIGH-TEMPERATURE SAGGING AND SACRIFICIAL ANODE PROPERTY

摘要

PURPOSE:To obtain an Al alloy thin plate for a heat exchanger having excellent high-temperature sagging and sacrificial anode properties, which consists of Zn and Mn in each prescribed ratio and the balance Al with inevitable impurities. CONSTITUTION:A titled Al alloy thin plate has composition which consists of 0.5-8.0% Zn and 0.5-1.5% Mn, by weight and the balance Al with inevitable impurities. This Al alloy thin plate has above described excellent characteristics, therefore, in case when it has been used especially for a fin material of a usual heat exchanger, corrosion of a pipe body can be prevented completely owing to an excellent sacrificial anode effect of the fin. Also, when brazing the pipe body with the fin material, the shape in case of assembling is held as it is even after brazing, therefore, a dense or sparse distribution of arrangement of the fin is not resulted. As a result, cooling and heating are executed uniformly and efficiently, and the performance and service life are improved.