GB397538A - Improvements in and relating to the preparation of aluminium or aluminium alloy anodes for electrolytic condensers and rectifiers - Google Patents
Improvements in and relating to the preparation of aluminium or aluminium alloy anodes for electrolytic condensers and rectifiersInfo
- Publication number
- GB397538A GB397538A GB516032A GB516032A GB397538A GB 397538 A GB397538 A GB 397538A GB 516032 A GB516032 A GB 516032A GB 516032 A GB516032 A GB 516032A GB 397538 A GB397538 A GB 397538A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aluminium
- oxide coating
- rectifiers
- aluminium alloy
- direct current
- 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
- 229910000838 Al alloy Inorganic materials 0.000 title abstract 3
- 239000004411 aluminium Substances 0.000 title abstract 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title abstract 2
- 229910052782 aluminium Inorganic materials 0.000 title 1
- 239000011248 coating agent Substances 0.000 abstract 3
- 238000000576 coating method Methods 0.000 abstract 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 abstract 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 abstract 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract 2
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 abstract 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract 1
- 229910019142 PO4 Inorganic materials 0.000 abstract 1
- 239000003513 alkali Substances 0.000 abstract 1
- 150000001342 alkaline earth metals Chemical class 0.000 abstract 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 abstract 1
- 239000012153 distilled water Substances 0.000 abstract 1
- 239000003792 electrolyte Substances 0.000 abstract 1
- 150000004679 hydroxides Chemical class 0.000 abstract 1
- 238000007654 immersion Methods 0.000 abstract 1
- 229910017604 nitric acid Inorganic materials 0.000 abstract 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract 1
- 239000010452 phosphate Substances 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 abstract 1
- 235000017557 sodium bicarbonate Nutrition 0.000 abstract 1
- 229910000029 sodium carbonate Inorganic materials 0.000 abstract 1
- PBYZMCDFOULPGH-UHFFFAOYSA-N tungstate Chemical compound [O-][W]([O-])(=O)=O PBYZMCDFOULPGH-UHFFFAOYSA-N 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- H01G9/0029—Processes of manufacture
- H01G9/0032—Processes of manufacture formation of the dielectric layer
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
Aluminium or aluminium alloy anodes for electrolytic condensers and rectifiers are treated so as to form a comparatively thick low resistance oxide coating either chemically or by the electrolytic action of direct current, the anode then having a dielectric thin oxide coating deposited thereon electrolytically by direct current. The low-resistance film may be formed chemically by immersion in a solution containing 3 per cent of sodium carbonate and 3 per cent of sodium bicarbonate at a temperature of about 98 DEG C. The electrode is then dipped in dilute nitric acid and washed in distilled water. Other metallic salts may be added to the solution of carbonates. Solutions containing the hydroxides of the alkali or alkaline earth metals may also be used, preferably at a lower temperature such as 45 DEG C. The coated electrode is then introduced into an electrolyte of the borate, phosphate, or tungstate type, where the dielectric oxide coating is deposited electrolytically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB516032A GB397538A (en) | 1932-02-20 | 1932-02-20 | Improvements in and relating to the preparation of aluminium or aluminium alloy anodes for electrolytic condensers and rectifiers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB516032A GB397538A (en) | 1932-02-20 | 1932-02-20 | Improvements in and relating to the preparation of aluminium or aluminium alloy anodes for electrolytic condensers and rectifiers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB397538A true GB397538A (en) | 1933-08-21 |
Family
ID=9790808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB516032A Expired GB397538A (en) | 1932-02-20 | 1932-02-20 | Improvements in and relating to the preparation of aluminium or aluminium alloy anodes for electrolytic condensers and rectifiers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB397538A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2444725A (en) * | 1944-08-09 | 1948-07-06 | Sprague Electric Co | Electrolytic condenser |
| DE974298C (en) * | 1942-05-23 | 1960-11-17 | Siemens Ag | Method of manufacturing an electrolytic capacitor |
| US3087872A (en) * | 1960-09-15 | 1963-04-30 | Sprague Electric Co | Electrolytic capacitor and method for producing same |
| US3245888A (en) * | 1961-01-27 | 1966-04-12 | Gen Electric | Method of electroforming an electrolytic capacitor electrode |
-
1932
- 1932-02-20 GB GB516032A patent/GB397538A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE974298C (en) * | 1942-05-23 | 1960-11-17 | Siemens Ag | Method of manufacturing an electrolytic capacitor |
| US2444725A (en) * | 1944-08-09 | 1948-07-06 | Sprague Electric Co | Electrolytic condenser |
| US3087872A (en) * | 1960-09-15 | 1963-04-30 | Sprague Electric Co | Electrolytic capacitor and method for producing same |
| US3245888A (en) * | 1961-01-27 | 1966-04-12 | Gen Electric | Method of electroforming an electrolytic capacitor electrode |
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