Method for making corrosion resistance heat exchangers

Details Method for making corrosion resistance heat exchangers Method for making corrosion resistance heat exchangers

1988-06-02

1989-08-01

Godici, Nicholas P.

Metal fusion bonding

Process

Plural joints

228209, 228223, 228254, 22826317, 228226, 204 33, 204 371, 204 384, B23K 112, B23K 119, F28D 1906, F28D 2100

Patent

active

048527912

ABSTRACT:
A method for producing corrosion resistance heat exchangers having a plurality of aluminum tubular elements and fin members, the method comprising immersing the tubular elements in a bath with passing an electric current so that the surfaces thereof are covered with zinc layers of 0.3 .mu.m or more in thickness; combining the zinc plated tubular elements with fin members covered with a brazing sheet so that a core is provisionally formed; painting the provisional core with a non-corrosive flux; and placing the provisional core in a furnace to braze the fin members to the tubular elements, and also to enable the zinc layers to diffuse over the surfaces of the tubular elements.

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patent: 4645119 (1987-02-01), Haramaki et al.
patent: 4705206 (1987-11-01), Kamiya et al.

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