EP 0305943 B1 19931020 - Etching process for zirconium metallic objects.
Title (en)
Etching process for zirconium metallic objects.
Title (de)
Ätzverfahren für Metallgegenstände aus Zirkonium.
Title (fr)
Procédé de décapage d'objets métalliques en zirconium.
Publication
Application
Priority
US 9122587 A 19870831
Abstract (en)
[origin: EP0305943A2] A process for determining the dissolved zirconium content of a hydrofluoric acid - nitric acid etching bath (7) for zirconium articles by determining the rise in temperature of a volume of the bath (7) upon immersion therein of a known quantity of zirconium metal (15), immersing a known quantity of zirconium metal (15) into a portion of the bath (7), measuring the rise in temperature over a predetermined period of time of said portion (7), determining the dissolved zirconium content of the bath (7) as a function of the rise in temperature, and treating the bath (7) dependent upon the dissolved zirconium content so determined to be in the bath (7).
IPC 1-7
IPC 8 full level
C23F 1/00 (2006.01); C23F 1/08 (2006.01); C23F 1/26 (2006.01)
CPC (source: EP KR)
Designated contracting state (EPC)
BE DE ES FR GB IT SE
DOCDB simple family (publication)
EP 0305943 A2 19890308; EP 0305943 A3 19900110; EP 0305943 B1 19931020; DE 3885044 D1 19931125; DE 3885044 T2 19940217; ES 2045045 T3 19940116; JP S6475685 A 19890322; KR 890003986 A 19890419
DOCDB simple family (application)
EP 88114045 A 19880829; DE 3885044 T 19880829; ES 88114045 T 19880829; JP 21821188 A 19880831; KR 880011240 A 19880831