Process for etching zirconium metallic objects

Details Process for etching zirconium metallic objects Process for etching zirconium metallic objects

1986-07-22

1988-04-19

Schor, Kenneth M.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

134 3, 134 10, 156664, C23F 100

Patent

active

047387475

ABSTRACT:
A process for etching zirconium metallic articles using an aqueous bath of hydrofluoric acid and nitric acid wherein the active hydrofluoric and nitric acid contents of the bath are determined by measurement of the dissolved zirconium content of the bath, and the bath is replenished in acid to give substantially the active hydrofluoric acid concentration and ratio to nitric acid, without removal of dissolved zirconium from the bath, to increase the bath etching life.

REFERENCES:
patent: 3048503 (1962-08-01), Foote
patent: 3125474 (1964-03-01), Watkins
patent: 3933544 (1976-01-01), Haas
patent: 4105469 (1978-08-01), Megy

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