Copper strip or sheet with a brown cover layer and methods for i

Details Copper strip or sheet with a brown cover layer and methods for i Copper strip or sheet with a brown cover layer and methods for i

1996-06-25

1999-10-05

Turner, Archene

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

4272551, 4272552, 4272553, 428336, 428469, 428472, 428701, 428702, C22C 900

Patent

active

059621168

ABSTRACT:
A copper strip or sheet having a red-brown to dark brown cover layer. The cover layer includes a first layer of Cu.sub.2 O which adheres to the base metal, with a thickness in the range of 0.05 to 5 .mu.m, preferably in the range of 0.1 to 1 .mu.m, and a second layer of CuO arranged on top of the first layer, with a thickness between 1 and 100 nm, preferably with a thickness between 10 and 50 nm. The cover layer is applied by heat treating the copper base to form a Cu.sub.2 O layer, followed by a second heat treatment to form a CuO layer. Alternatively, the cover layer is applied by heat treating the copper base in an oxygen containing atmosphere followed by treatment with an aqueous solution of a salt which produces an alkali reaction. The resulting copper strip or sheet of the invention is well suited for use in the construction sector.

REFERENCES:
patent: 4189331 (1980-02-01), Roy
patent: 5264049 (1993-11-01), Yoshida et al.
patent: 5643679 (1997-07-01), Ishimaru et al.
Chemical Abstracts, vol. 83, No. 2, Jul. 1975, p. 258, Abstract No. 32184t.

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