Copper fin material for heat-exchanger and method of producing t

Details Copper fin material for heat-exchanger and method of producing t Copper fin material for heat-exchanger and method of producing t

1991-07-29

1993-01-05

Niebling, John

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Treating electrolytic or nonelectrolytic coating after it is...

205244, 205245, 427436, 1651341, 148536, C25D 550

Patent

active

051768127

ABSTRACT:
A copper fin material for heat-exchangers is characterized in that, on the surface of Cu or Cu alloy strip, an inner side diffused layer comprising Cu and Zn and a surface side diffused layer provided on the surface side thereof comprising Cu, Zn and elements with a lower diffusion coefficient into Cu than that of Zn is formed. A method of producing the same is characterized in that, after an alloy film comprising Zn and element with a lower diffusion coefficient into Cu than that of Zn is formed on the surface of a Cu or Cu alloy strip, a diffusion treatment is performed under heat so that, on the surface of the Cu or Cu alloy strip, an inner side diffused layer comprising Cu and Zn and a surface side diffused layer provided on the surface side thereof comprising Cu, Zn and elements with a lower diffusion coefficient into Cu than that of Zn are formed. Alternatively, the diffusion treatment under heat is combined with a rolling processing step.

REFERENCES:
patent: 4892141 (1990-01-01), Shiga et al.

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