Protective film on Cu-Sn alloys

Details Protective film on Cu-Sn alloys Protective film on Cu-Sn alloys

1983-10-03

1984-10-23

Rutledge, L. Dewayne

Metal treatment

Compositions

Heat treating

428469, 428629, 428633, B32B 1504

Patent

active

044786514

ABSTRACT:
A heat treatment for providing copper-tin alloys with a substantially continuous tin-phosphorous-oxide protective layer that improves the appearance and the tarnish resistance of the alloys is disclosed. The heat treatment comprises heating the alloys in a reducing atmosphere having a dew point of at least about 65.degree. F. and a temperature in the range of about 700.degree. C. to about 900.degree. C. for a time in the range of about 2 hours to about 24 hours.

REFERENCES:
patent: 2327127 (1943-08-01), Rath
patent: 4195124 (1980-03-01), Doi et al.

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