Post-plating passivation treatment

Details Post-plating passivation treatment Post-plating passivation treatment

1991-04-18

1993-01-26

Niebling, John

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

205149, 205176, 205197, 351 41, 428935, C23C 2800

Patent

active

051821729

ABSTRACT:
An improved method for inhibiting corrosion of precious metal plated objects is provided wherein a thin dichromate film coats the precious metal outer surface and fills the precious metal outer surface pores using either immersion or electrolytic methods employing passivation plating techniques. The method is useful in the manufacture of eyewear frames

REFERENCES:
patent: 3772165 (1973-11-01), Yamagishi et al.
patent: 4071417 (1978-01-01), Koontz et al.
patent: 4842961 (1989-06-01), Basile et al.
Fred W. Eppensteiner et al., Chromate Conversion Coatings, Metal Finishing, Sep., 1975, pp. 29-34.

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