EP 0305943 A3 19900110 - ETCHING PROCESS FOR ZIRCONIUM METALLIC OBJECTS
Title (en)
ETCHING PROCESS FOR ZIRCONIUM METALLIC OBJECTS
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)
Citation (search report)
- [A] NL 6515842 A 19661227
- [AD] DE 2828547 A1 19800103 - DIDIER WERKE AG
- [A] US 3419446 A 19681231 - BENTON ROBERT C
- [APD] EP 0254539 A1 19880127 - WESTINGHOUSE ELECTRIC CORP [US]
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