Aluminum alloy strips for heat exchangers

Details Aluminum alloy strips for heat exchangers Aluminum alloy strips for heat exchangers

2002-11-12

2010-10-12

King, Roy (Department: 1793)

Metal treatment

Stock

Aluminum base

C148S551000

Reexamination Certificate

active

07811394

ABSTRACT:
Aluminum alloy strips less than 0.3 mm thick for making heat exchangers, containing, in wt. %: Si<1.0, Fe<1.0, Cu<0.8, Mg<1.0, Mn≦1.8, Zn<2.0, In<0.2, Sn<0.2, Bi<0.2, Ti<0.2, Cr<0.25, Zr<0.25, Si+Fe+Mn+Mg>0.8, other elements <0.05, each and <0.15 in total. The strips have between the surface and half the thickness a difference of corrosion potential, measured relative to a saturated calomel electrode in accordance with the ASTM G69 standard, of at least 10 mV. The invention also concerns a method for making such strips by continuous casting in conditions promoting formation of segregations in the strip core, optionally hot rolling, cold rolling optionally with one or several intermediate or final annealing(s) of 1 to 20 hours at a temperature between 200 and 450° C. The fins or separators made from the inventive strips have enhanced resistance to perforating corrosion.

REFERENCES:
patent: 4737198 (1988-04-01), Shabel et al.
patent: 5476725 (1995-12-01), Papich et al.
patent: 5518064 (1996-05-01), Romanowski et al.
patent: 6165291 (2000-12-01), Jin et al.
patent: 0039211 (1981-11-01), None
patent: 0694356 (1996-01-01), None
patent: 01034548 (1989-02-01), None
patent: 9852707 (1998-11-01), None
English translation of JP 01034548. (Feb. 6, 1989).
Menet et al, XP-002241149 “Light Metals 1997”, Proc. Conf. Orlando, FL, pp. 753-756, 1997.
Thomas et al, XP-002241150 “Alumitech '94”, Proc. Conf. Atlanta, GA, 427-447, 1994.
Sahoo et al, XP-002241151 “Extraction, Refining and Fabrication of Light Metals”; Edmonds et al, pp. 257-270, 1991.
Jin et al, XP-002241152 “Casting of Near Net Shape Products”, pp. 645-653, 1988.

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