COPPER RADIATOR FOR MOTOR CARS EXCELLENT IN CORROSION RESISTANCE AND METHOD OF MANUFACTURING THE SAME

摘要

A copper radiator is disclosed, wherein fins are fitted to the outside of a plurality of tubes, through which a heat-exchanging medium flows, by bonding with solder, to form a copper core, and a seat plate is fitted to one or both ends of the core by bonding with solder to connect tanks thereto. The thickness of oxidized film on the surface of the fins after assembly is not more than 1200 .ANG.. Methods described therein include the soldering of the core being carried out in a nonoxidizing atmosphere and/or the core being submitted to a reduction treatment by heating in a reducing atmosphere during assembling the radiator after the formation of core. The core may also be submitted to a dipping treatment in a copper oxide-dissolvable or reducing solution during assembling the radiator after the formation of core and that, subsequent to the respective treatments aforementioned, a rust inhibitor can be adsorbed or adhered onto the surface of the fins in the process of the assembling of radiator after formation of the core.