Aluminum alloy fin assembly for heat exchangers with excellent strength, electrical conductivity, corrosion resistance and solderability and heat exchangers

摘要

Specified is an aluminum alloy fin arrangement for a heat exchanger which is free from soldering defects due to a fin deformation during brazing and is excellent in terms of strength, electrical conductivity, corrosion resistance and solderability, and a heat exchanger. An aluminum alloy fin arrangement for a heat exchanger is made of an aluminum alloy which has a composition containing as mass%: Mn: 1.2% to 2.0%, Si: 0.5% to 1.3%, Cu: 0.001% to less than 0.05%, Fe: 0.1% to 0.5%, Zn: 0.5% to 2.5% and a balance consisting of Al and unavoidable impurities, wherein at room temperature after soldering heating, the aluminum alloy fin assembly has a tensile strength of 140 MPa or more , a 0.2% proof stress of 50 MPa or more, an electrical conductivity of 42% IACS or more, an electrical potential of -800 mV or more and -710 mV or less, and a corrosion weight loss of 120 mg / dm or less after 16 weeks in a neutral salt spray test.