GB734524A - Improvements in or relating to metal foil for electrolytic condensers - Google Patents

Improvements in or relating to metal foil for electrolytic condensers

Info

Publication number
GB734524A
GB734524A GB21668/52A GB2166852A GB734524A GB 734524 A GB734524 A GB 734524A GB 21668/52 A GB21668/52 A GB 21668/52A GB 2166852 A GB2166852 A GB 2166852A GB 734524 A GB734524 A GB 734524A
Authority
GB
United Kingdom
Prior art keywords
electrolytic
metal foil
relating
per cent
electrolytic condensers
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
Application number
GB21668/52A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB734524A publication Critical patent/GB734524A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
    • H01G9/042—Electrodes or formation of dielectric layers thereon characterised by the material
    • H01G9/045—Electrodes or formation of dielectric layers thereon characterised by the material based on aluminium
    • 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

Abstract

A metal foil for electrolytic capacitors having a suface roughened by electrolytic corrosion, consists of high-purity aluminium containing up to 0.03 per cent of a metal other than beryllium or tantalu, which forms microscopic independent crystal types more noble than aluminium in the material, while avoiding the formatiion of mixed crystals, so that it accelerates the corroison process by providing a depolarizing action. Preferably the foil includes at least 0.001 per cent of nickel or platinum, but gold, cobalt, tungsten, nolybdenum, chromium and zirconium may also be used. Alternating current may be used for electrolytic corrision in an acid bath.
GB21668/52A 1951-08-28 1952-08-28 Improvements in or relating to metal foil for electrolytic condensers Expired GB734524A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE734524X 1951-08-28

Publications (1)

Publication Number Publication Date
GB734524A true GB734524A (en) 1955-08-03

Family

ID=6641807

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21668/52A Expired GB734524A (en) 1951-08-28 1952-08-28 Improvements in or relating to metal foil for electrolytic condensers

Country Status (1)

Country Link
GB (1) GB734524A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2886432A (en) * 1955-11-18 1959-05-12 Aluminium Ind Ag Aluminum foil for electrolytic condensers
US3258318A (en) * 1963-09-10 1966-06-28 Rheinische Blattmetall Ag Etched metal foil for electrolytic capacitors and the like consisting of silver-aluminum alloys
US5518823A (en) * 1990-12-11 1996-05-21 Showa Aluminum Kabushiki Aluminum foil as electrolytic condenser electrodes
EP1734546A3 (en) * 2005-06-14 2009-02-11 Mitsubishi Aluminum Kabushiki Kaisha Aluminum foil for the electrolytic capacitor and etching method for forming etching pits
CN1921042B (en) * 2005-06-14 2011-12-14 三菱铝株式会社 Aluminum foil for the electrolytic capacitor and etching method for forming etching pits

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2886432A (en) * 1955-11-18 1959-05-12 Aluminium Ind Ag Aluminum foil for electrolytic condensers
US3258318A (en) * 1963-09-10 1966-06-28 Rheinische Blattmetall Ag Etched metal foil for electrolytic capacitors and the like consisting of silver-aluminum alloys
US5518823A (en) * 1990-12-11 1996-05-21 Showa Aluminum Kabushiki Aluminum foil as electrolytic condenser electrodes
EP1734546A3 (en) * 2005-06-14 2009-02-11 Mitsubishi Aluminum Kabushiki Kaisha Aluminum foil for the electrolytic capacitor and etching method for forming etching pits
CN1921042B (en) * 2005-06-14 2011-12-14 三菱铝株式会社 Aluminum foil for the electrolytic capacitor and etching method for forming etching pits

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