JPS5576098A - Production of electrode for aluminum electrolytic capacitor - Google Patents

Production of electrode for aluminum electrolytic capacitor

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Publication number
JPS5576098A
JPS5576098A JP14967978A JP14967978A JPS5576098A JP S5576098 A JPS5576098 A JP S5576098A JP 14967978 A JP14967978 A JP 14967978A JP 14967978 A JP14967978 A JP 14967978A JP S5576098 A JPS5576098 A JP S5576098A
Authority
JP
Japan
Prior art keywords
expansion rate
surface expansion
foil
pits
temperature
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.)
Pending
Application number
JP14967978A
Other languages
Japanese (ja)
Inventor
Tadashi Yamazaki
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP14967978A priority Critical patent/JPS5576098A/en
Publication of JPS5576098A publication Critical patent/JPS5576098A/en
Pending legal-status Critical Current

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  • ing And Chemical Polishing (AREA)

Abstract

PURPOSE: To form an aluminum electrode foil of a high surface expansion rate and tensile strength by letting sodium hyposulfite exist in a high-concentration high- temperature hydrochloric acid solution and applying DC electrolytic etching under the specific conditions.
CONSTITUTION: At the time of expanding the surface area of an Al metal foil through electrolytic etching, sodium hyposulfite is added at 2W6% into the bath of HCl concentrations 3W15%, and while the solution temperature is being maintained at 75°C or more, the foil is pretreated by using the electric quantity of DC 2W 30 Coulomb/cm2, after which it is subjected to deep etching at current density 0.02W0.1A/cm2 DC at the same temperature, whereby the pits of diameters made 4 times larger than those by conventional methods are formed. Because of this, the decrease in surface expansion rate in the high pressure region is small and since the shape of the pits becomes perpendicular and regular cylindrical form, the surface expansion rate becomes extremely high.
COPYRIGHT: (C)1980,JPO&Japio
JP14967978A 1978-12-05 1978-12-05 Production of electrode for aluminum electrolytic capacitor Pending JPS5576098A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14967978A JPS5576098A (en) 1978-12-05 1978-12-05 Production of electrode for aluminum electrolytic capacitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14967978A JPS5576098A (en) 1978-12-05 1978-12-05 Production of electrode for aluminum electrolytic capacitor

Publications (1)

Publication Number Publication Date
JPS5576098A true JPS5576098A (en) 1980-06-07

Family

ID=15480447

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14967978A Pending JPS5576098A (en) 1978-12-05 1978-12-05 Production of electrode for aluminum electrolytic capacitor

Country Status (1)

Country Link
JP (1) JPS5576098A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5766616A (en) * 1980-10-13 1982-04-22 Showa Aluminium Co Ltd Method of producing alumihum foil for electrolytic condenser electrode
JPS5766620A (en) * 1980-10-13 1982-04-22 Showa Aluminium Co Ltd Method of etching aluminum foil for electrolytic conddnser electrode
JPS6063916A (en) * 1984-07-31 1985-04-12 昭和アルミニウム株式会社 Method of electrolytically etching aluminum foil for electrolytic condenser electrode

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5766616A (en) * 1980-10-13 1982-04-22 Showa Aluminium Co Ltd Method of producing alumihum foil for electrolytic condenser electrode
JPS5766620A (en) * 1980-10-13 1982-04-22 Showa Aluminium Co Ltd Method of etching aluminum foil for electrolytic conddnser electrode
JPS6225247B2 (en) * 1980-10-13 1987-06-02 Showa Aluminium Co Ltd
JPS6225248B2 (en) * 1980-10-13 1987-06-02 Showa Aluminium Co Ltd
JPS6063916A (en) * 1984-07-31 1985-04-12 昭和アルミニウム株式会社 Method of electrolytically etching aluminum foil for electrolytic condenser electrode
JPH0315816B2 (en) * 1984-07-31 1991-03-04 Showa Aluminium Co Ltd

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