COMPOSITE AL ALLOY MATERIAL FOR FIN OF HEAT EXCHANGER HAVING SUPERIOR STRENGTH AT HIGH TEMPERATURE AND SIGNIFICANT SACRIFICIAL ANODE EFFECT

摘要

PURPOSE:To obtain a composite Al alloy material for the fins of a heat exchanger having superior strength at high temp. and a significant sacrificial anode effect by cladding both sides of a core material of an Al alloy contg. specified amounts of Mn and Zn with a shell material of an Al alloy contg. specified amounts of Sn and Zn. CONSTITUTION:Both sides of a core material of an Al alloy having a composition consisting of 0.1-1.5wt% Mn, 0.01-0.5wt% Zn and the balance Al with inevitable impurities are clad with a shell material of an Al alloy having a composition consisting of 0.03-0.12wt% Sn, 0.01-0.3wt% Zn and the balance Al with inevitable impurities.