Cobalt-containing precious metal material for decoration

Details Cobalt-containing precious metal material for decoration Cobalt-containing precious metal material for decoration

1990-01-26

1991-08-06

Dean, R.

Metal treatment

Stock

Noble metal base

148431, 148281, 148286, 204 371, 204 376, C23C 802

Patent

active

050374966

ABSTRACT:
Disclosed herein is cobalt-containing precious metal material for decoration which comprises cobalt and one or more precious metals selected form the group consisting of Au, Ag, Pt and Pd, at least the cobalt on the surface being oxidized.
Also disclosed herein is a process for preparing cobalt-containing precious metal material for decoration which comprises blending cobalt and one or more precious metals selected from the group consisting of Au, Ag, Pt and Pd, and oxidizing the blend in an oxidative atmosphere so as to form the oxidized cobalt on the surface of the material.

REFERENCES:
patent: 1565200 (1925-12-01), Reeve
patent: 4504327 (1985-03-01), Inomata et al.

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