ALUMINUM ALLOY MATERIAL OF EXCELLENT CORROSION RESISTANCE, PLATE FIN TYPE HEAT EXCHANGER AND PLATE TYPE HEAT EXCHANGER

摘要

PROBLEM TO BE SOLVED: To provide an aluminum alloy material of excellent corrosion resistance even if directly forming a fluororesin corrosion-proof coating film on the surface of the aluminum alloy material without applying coating substrate treatment, and to provide a plate fin type heat exchanger and a plate type heat exchanger using the aluminum alloy material for a heat transfer part with a corrosive fluid as a medium.;SOLUTION: When directly forming the fluororesin film on the surface of the aluminum alloy material used for the plate fin type heat exchanger, the plate type heat exchanger or the like using a heat transfer part with the corrosive fluid as the medium without forming the coating backing film, the alloy material is formed of an aluminum alloy composition selected from either one of JIS3000, 5000 and 6000 with a 0.2% proof stress of 150 MPa or larger, and the amount of an Mg concentration to the alloy surface is minimized to improve the durability of coating film adhesion.;COPYRIGHT: (C)2009,JPO&INPIT