Etching process for zirconium metallic objects

Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step

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156664, 436 55, 436 83, 134 3, C23F 100

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active

049274929

ABSTRACT:
A process is disclosed for determining the dissolved zirconium content of a hydrofluoric acid-nitric acid etching bath for zirconium articles by determining the rise in temperature of a volume of the bath upon immersion therein of a known quantity of zirconium metal, immersing a known quantity of zirconium metal into a portion of the bath, measuring the rise in temperature over a predetermined period of time of said portion, determining the dissolved zirconium content of the bath as a function of the rise in temperature, and treating the bath dependent upon the dissolved zirconium content so determined to be in the bath.

REFERENCES:
patent: 2827724 (1958-03-01), Edds
patent: 3007769 (1961-11-01), McCord et al.
patent: 3048503 (1962-08-01), Foote et al.
patent: 3125474 (1964-03-01), Watkins et al.
patent: 3959046 (1976-05-01), Bussmann et al.
patent: 4105469 (1978-08-01), Megy et al.
patent: 4395302 (1983-07-01), Courduvelis

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