Patent ID: 8152047
Filing Date: 2012-04-10
Classification: B23K,F28D,F28F,Y10T

Abstract:
1. A method of forming a corrosion resistant aluminum-copper heat exchanger, the method comprising: providing at least one aluminum tube for conveying a pressurized fluid; providing at least one aluminum connector, having an exterior and an interior; at least partially coating one end of the exterior of the at least one aluminum connector; providing a cladding material for brazing the aluminum tube to the aluminum connector; brazing the aluminum tube to the uncoated end of the aluminum connector in a controlled atmosphere brazing oven; providing at least one copper tube; providing a cladding material for brazing the at least partially coated end of the aluminum connector to the copper tube; brazing the partially coated end of the aluminum connector to the copper inlet tube or copper outlet tube; and, wherein the coated end of the aluminum connector is coated with a metal having a higher solidus temperature than the brazing temperature used to braze the aluminum connector to the copper tube.