GB511590A - Improvements in or relating to the treatment of electrodes for electrolytic devices, such as electrolytic condensers - Google Patents
Improvements in or relating to the treatment of electrodes for electrolytic devices, such as electrolytic condensersInfo
- Publication number
- GB511590A GB511590A GB31925/37A GB3192537A GB511590A GB 511590 A GB511590 A GB 511590A GB 31925/37 A GB31925/37 A GB 31925/37A GB 3192537 A GB3192537 A GB 3192537A GB 511590 A GB511590 A GB 511590A
- Authority
- GB
- United Kingdom
- Prior art keywords
- isopropanol
- electrolytic
- etching
- treatment
- cathodes
- 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
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 abstract 12
- 238000005530 etching Methods 0.000 abstract 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract 2
- 238000000866 electrolytic etching Methods 0.000 abstract 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical class [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 1
- 239000003513 alkali Substances 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 238000009835 boiling Methods 0.000 abstract 1
- 239000003792 electrolyte Substances 0.000 abstract 1
- 235000019253 formic acid Nutrition 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 239000011780 sodium chloride Substances 0.000 abstract 1
- 239000007921 spray Substances 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
- 239000011800 void material Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
- H01G9/055—Etched foil electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- ing And Chemical Polishing (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
511,590. Electrolytic etching ; isopropanol. DUBILIER CONDENSER CO. (1925), Ltd. Nov. 19, 1937, No. 31925. Void. Convention date, Nov. 19, 1936. [Class 41] [Also in Group IV] In an electrolytic etching treatment applied to a strip A of aluminium or other metal which is to be subsequently used as an electrode in an electrolytic condenser the cathodes F, F<1> are curved so as to produce uniform etching ; in a modification the cathodes are complete cylinders of smaller radius. The etching electrolyte may consist of a solution of sodium chloride maintained at its boiling point by the current and/or a supplementary heater. After leaving the etching bath the strip is washed by sprays and passed through a bath of a volatile medium such as isopropanol and finally dried by heating. Water may be removed from used isopropanol by stirring with dehydrated sodium hydroxide and settling, the isopropanol forming the upper layer. Any alkali present in the isopropanol so recovered may be neutralised with formic acid. The water content of commercial isopropanol may also be reduced by this treatment. Specifications 416,010 and 467,024 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US511590XA | 1936-11-19 | 1936-11-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB511590A true GB511590A (en) | 1939-08-21 |
Family
ID=21969693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31925/37A Expired GB511590A (en) | 1936-11-19 | 1937-11-19 | Improvements in or relating to the treatment of electrodes for electrolytic devices, such as electrolytic condensers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB511590A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE948725C (en) * | 1952-07-10 | 1956-09-06 | Western Electric Co | Process for the production of an electrode for electrolytic capacitors from a tantalum foil |
| DE1151604B (en) * | 1951-06-19 | 1963-07-18 | British Dielectric Res Ltd | Anodic-electrolytic etching process to enlarge the surface of electrode starting material for electrolytic capacitors |
| DE1194059B (en) * | 1952-09-22 | 1965-06-03 | Siemens Ag | Process for enlarging the surface of valve metal, in particular aluminum electrodes for electrolytic capacitors and equipment for its implementation |
-
1937
- 1937-11-19 GB GB31925/37A patent/GB511590A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1151604B (en) * | 1951-06-19 | 1963-07-18 | British Dielectric Res Ltd | Anodic-electrolytic etching process to enlarge the surface of electrode starting material for electrolytic capacitors |
| DE948725C (en) * | 1952-07-10 | 1956-09-06 | Western Electric Co | Process for the production of an electrode for electrolytic capacitors from a tantalum foil |
| DE1194059B (en) * | 1952-09-22 | 1965-06-03 | Siemens Ag | Process for enlarging the surface of valve metal, in particular aluminum electrodes for electrolytic capacitors and equipment for its implementation |
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