GB1067911A - Improvements in or relating to the electrolytic etching of zirconium and zirconium-base alloys - Google Patents

Improvements in or relating to the electrolytic etching of zirconium and zirconium-base alloys

Info

Publication number
GB1067911A
GB1067911A GB38812/64A GB3881264A GB1067911A GB 1067911 A GB1067911 A GB 1067911A GB 38812/64 A GB38812/64 A GB 38812/64A GB 3881264 A GB3881264 A GB 3881264A GB 1067911 A GB1067911 A GB 1067911A
Authority
GB
United Kingdom
Prior art keywords
zirconium
stage
metal
relating
away
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB38812/64A
Inventor
Jacques Delafosse
Jean Herenguel
Pierre Lelong
Simon Silberman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of GB1067911A publication Critical patent/GB1067911A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • C25D5/38—Pretreatment of metallic surfaces to be electroplated of refractory metals or nickel
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
    • C25F1/02—Pickling; Descaling
    • C25F1/04—Pickling; Descaling in solution
    • C25F1/08—Refractory metals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • ing And Chemical Polishing (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

Zr or Zr base alloy is electrolytically etched by subjecting the metal to electrolysis as anode in a bath comprising HNO3 and a source of fluoride ions, the electrolytic process comprising a first stage carried out a current density and for a period of time such that there is formed on the metal an oxide film having a thickness of more than 6 microns and a second stage carried out at a voltage which is lower than that of the first stage, during which second stage the oxide film breaks away. Oxide films which were present on the metal initially break away with the anodically produced oxide. The temperature of the electrolysis may be from 10 to 25 DEG C. Different concentrations of HNO3 and fluoride ions may be used during the oxidizing and break-away stages. The two stages may be repeated.
GB38812/64A 1963-10-01 1964-09-23 Improvements in or relating to the electrolytic etching of zirconium and zirconium-base alloys Expired GB1067911A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR949147A FR1383839A (en) 1963-10-01 1963-10-01 Process for electrolytic pickling of zirconium and its alloys and products obtained by this process

Publications (1)

Publication Number Publication Date
GB1067911A true GB1067911A (en) 1967-05-10

Family

ID=8813409

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38812/64A Expired GB1067911A (en) 1963-10-01 1964-09-23 Improvements in or relating to the electrolytic etching of zirconium and zirconium-base alloys

Country Status (8)

Country Link
US (1) US3371021A (en)
BE (1) BE653789A (en)
CH (1) CH433896A (en)
ES (1) ES304523A1 (en)
FR (1) FR1383839A (en)
GB (1) GB1067911A (en)
LU (1) LU46993A1 (en)
NL (1) NL6411398A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2343899A (en) * 1998-11-19 2000-05-24 Toshiba Kk Electrolytic treatment of nuclear waste

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60200972A (en) * 1984-03-23 1985-10-11 Hitachi Ltd Corrosion prevention of zirconium or zirconium alloy

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3242062A (en) * 1966-03-22 Fluorine-cuntaining electrolyte for electrolytic cutting of metals
US2780594A (en) * 1955-08-05 1957-02-05 Temco Aircraft Corp Electrolytic descaling
US3006827A (en) * 1959-01-06 1961-10-31 United Aircraft Corp Method of pickling titanium and compositions used therein

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2343899A (en) * 1998-11-19 2000-05-24 Toshiba Kk Electrolytic treatment of nuclear waste
GB2343899B (en) * 1998-11-19 2001-05-16 Toshiba Kk Electrolytic treatment method of zirconium and apparatus therefor

Also Published As

Publication number Publication date
US3371021A (en) 1968-02-27
ES304523A1 (en) 1965-02-01
FR1383839A (en) 1965-01-04
NL6411398A (en) 1965-04-02
BE653789A (en) 1965-01-18
LU46993A1 (en) 1964-11-23
CH433896A (en) 1967-04-15

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