GB489884A - Processes for etching electrode metal for electrolytic condensers and the like - Google Patents
Processes for etching electrode metal for electrolytic condensers and the likeInfo
- Publication number
- GB489884A GB489884A GB14548/37A GB1454837A GB489884A GB 489884 A GB489884 A GB 489884A GB 14548/37 A GB14548/37 A GB 14548/37A GB 1454837 A GB1454837 A GB 1454837A GB 489884 A GB489884 A GB 489884A
- Authority
- GB
- United Kingdom
- Prior art keywords
- metal
- etching
- copper
- foil
- solution
- 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
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/02—Etching
- C25F3/04—Etching of light metals
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- ing And Chemical Polishing (AREA)
Abstract
489,884. Etching. MALLORY PATENTS HOLDING CO., Ltd. May 25, 1937, No. 14548. Convention date, Aug. 6, 1936. [Class 100 (ii)] Metal for use in the manufacture of electrodes for electrolytic condensers and the like is etched by contacting the metal with a metal electropositive thereto and subjecting the contacted metal to the action of an etching solution having an acidity such that its pH value is below zero. Aluminium foil 10 is passed successively through tanks 12 ... 16 and then through a drier 17. The tank 14 contains an etching-fluid through which the foil passes between a screen-drum 19 and a screen-belt 21 both made of copper of about 100 mesh, the inside surface of the drum being exposed to the fluid, which consists of hydrochloric acid containing 15-25 per cent of fullstrength acid but not exceeding 50 per cent. The tank 12 contains a cleaning-fluid such as caustic soda solution or hydrofluoric acid, and the tanks 13, 15, 16 contain water for washing the foil. In a modification, the drum and belt are omitted, and the foil is passed through a solution of a displaceable metal ion such as lead, copper, or nickel, e.g. a 0À5 to 2À0 per cent solution of copper or lead chloride, to deposit a thin porous layer of metal on the foil before etching. In place of a metal ion, metal powder or metal compounds such as copper sulphide, copper oxide, or lead oxide may be used. Specification 453,042 is referred to. The Specification as open to inspection under Sect. 91 describes apparatus in which the contacting metal is added to the etching- bath. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US489884XA | 1936-08-06 | 1936-08-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB489884A true GB489884A (en) | 1938-08-05 |
Family
ID=21957495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14548/37A Expired GB489884A (en) | 1936-08-06 | 1937-05-25 | Processes for etching electrode metal for electrolytic condensers and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB489884A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2730494A (en) * | 1950-09-16 | 1956-01-10 | Gen Motors Corp | Process of electrolytic deburring of metal |
| DE1031891B (en) * | 1952-03-13 | 1958-06-12 | Dr Karl Kilchling | Process for roughening electrodes for electrolytic capacitors |
| DE1033781B (en) * | 1954-07-28 | 1958-07-10 | Aluminium Walzwerke Singen | Process for the production of chemically or electrochemically strongly roughened aluminum surfaces for electrolytic capacitors |
| DE1122177B (en) * | 1954-07-09 | 1962-01-18 | Siemens Ag | Process for the production of roughened electrodes, in particular aluminum electrodes 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
- 1937-05-25 GB GB14548/37A patent/GB489884A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2730494A (en) * | 1950-09-16 | 1956-01-10 | Gen Motors Corp | Process of electrolytic deburring of metal |
| DE1031891B (en) * | 1952-03-13 | 1958-06-12 | Dr Karl Kilchling | Process for roughening electrodes 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 |
| DE1122177B (en) * | 1954-07-09 | 1962-01-18 | Siemens Ag | Process for the production of roughened electrodes, in particular aluminum electrodes for electrolytic capacitors |
| DE1033781B (en) * | 1954-07-28 | 1958-07-10 | Aluminium Walzwerke Singen | Process for the production of chemically or electrochemically strongly roughened aluminum surfaces for electrolytic capacitors |
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