Method for manufacture of heat exchanger with aluminum material

Details Method for manufacture of heat exchanger with aluminum material Method for manufacture of heat exchanger with aluminum material

F - Mech Eng,Light,Heat,Weapons

28

F

257/30, 117/114.

F28F 19/02 (2006.01)

Patent

CA 1221280

ABSTRACT OF THE DISCLOSURE A method for the manufacture of a heat exchanger with aluminum material, characterized by the steps of causing precipitation of 0.5 to 20 g/m2 of zinc on the surface of at least the liquid passing tube or members making up said liquid passing tube, of a heat exchanger fabricated of aluminum material, then applying to the surface flux formed of a mixture of potassium tetrafluoro- aluminate with potassium hexafluoroaluminate, and brazing said heat exchanger by the use of brazing filler of an aluminumsilicon alloy having a lower melting point than said aluminum material at a temperature of about 580° to about 620°C.

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