GB752940A - Method of chemically cleaning the surface of articles of zirconium or hafnium or alloys thereof and of applying adherent electrophates to zirconium or hafnium surfaces or to the surfaces of alloys of these metals - Google Patents
Method of chemically cleaning the surface of articles of zirconium or hafnium or alloys thereof and of applying adherent electrophates to zirconium or hafnium surfaces or to the surfaces of alloys of these metalsInfo
- Publication number
- GB752940A GB752940A GB13582/54A GB1358254A GB752940A GB 752940 A GB752940 A GB 752940A GB 13582/54 A GB13582/54 A GB 13582/54A GB 1358254 A GB1358254 A GB 1358254A GB 752940 A GB752940 A GB 752940A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alloys
- hafnium
- zirconium
- articles
- electrophates
- 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
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/10—Other heavy metals
- C23G1/106—Other heavy metals refractory metals
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
In a method of cleaning the surface of articles of Zr or Hf, or alloys of Zr or Hf, the article is first physically cleaned, e.g. by sand-blasting, and then immersed in an aqueous solution containing NH4F and HF in a molar ratio of 1,2-3 for 10-240 seconds at a temperature of 70 DEG -120 DEG F. The solution may contain 0,25-1 per cent. of an aliphatic amine of formula CnH2n + 1 NH2. Where 12\sEn\sE18, when the said molar ratio may be 1-3 and the quantities of NH4F and HF are preferably 0,44-1,32 and 0,44-0,88 moles/litre respectively. A surface prepared in this way is stated to be particularly suitable for receiving an electroplated metallic coating.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US752940XA | 1953-05-15 | 1953-05-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB752940A true GB752940A (en) | 1956-07-18 |
Family
ID=22124763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13582/54A Expired GB752940A (en) | 1953-05-15 | 1954-05-10 | Method of chemically cleaning the surface of articles of zirconium or hafnium or alloys thereof and of applying adherent electrophates to zirconium or hafnium surfaces or to the surfaces of alloys of these metals |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB752940A (en) |
-
1954
- 1954-05-10 GB GB13582/54A patent/GB752940A/en not_active Expired
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