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 alloysInfo
- 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
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.
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)
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)
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)
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 |
-
1963
- 1963-10-01 FR FR949147A patent/FR1383839A/en not_active Expired
-
1964
- 1964-09-22 US US398423A patent/US3371021A/en not_active Expired - Lifetime
- 1964-09-22 LU LU46993D patent/LU46993A1/xx unknown
- 1964-09-23 GB GB38812/64A patent/GB1067911A/en not_active Expired
- 1964-09-30 BE BE653789D patent/BE653789A/xx unknown
- 1964-09-30 NL NL6411398A patent/NL6411398A/xx unknown
- 1964-09-30 CH CH1271064A patent/CH433896A/en unknown
- 1964-09-30 ES ES0304523A patent/ES304523A1/en not_active Expired
Cited By (2)
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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