JPS6413229A - Method for regenerating substrate for magnetic disk - Google Patents

Method for regenerating substrate for magnetic disk

Info

Publication number
JPS6413229A
JPS6413229A JP16913587A JP16913587A JPS6413229A JP S6413229 A JPS6413229 A JP S6413229A JP 16913587 A JP16913587 A JP 16913587A JP 16913587 A JP16913587 A JP 16913587A JP S6413229 A JPS6413229 A JP S6413229A
Authority
JP
Japan
Prior art keywords
magnetic
substrate
layer
stripping
magnetic disk
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
JP16913587A
Other languages
Japanese (ja)
Inventor
Tadatoshi Kurozumi
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.)
Resonac Holdings Corp
Original Assignee
Showa Denko KK
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 Showa Denko KK filed Critical Showa Denko KK
Priority to JP16913587A priority Critical patent/JPS6413229A/en
Publication of JPS6413229A publication Critical patent/JPS6413229A/en
Pending legal-status Critical Current

Links

Landscapes

  • Magnetic Record Carriers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To enable the reuse of a magnetic disk substrate made of aluminum or aluminum alloy formed with a nonmagnetic underlying plating layer by stripping the magnetic layer and protective film layer successively formed on said substrate by a specified alkaline liquid. CONSTITUTION:The magnetic underlying layer, magnetic layer and protective film layer successively formed on the magnetic disk which is a defective or used magnetic disk and is made of the aluminum or aluminum alloy formed with the nonmagnetic plating layer and magnetic plating layer on the surface are stripped by the alkaline liquid contg. permanganic acid ions. The stripping liquid is prepd. by dissolving sodium permanganate or potassium permanganate and sodium hydroxide or potassium hydroxide into water. The stripping treatment is executed usually for 5-60min at 50-70 deg.C with the oxidation reduction as a main reaction, by which the above-mentioned layers can be stripped. The regenerated substrate obtd. after the stripping is subjected to mirror finishing and the respective forming layers are formed thereon. Such substrate is reusable.
JP16913587A 1987-07-07 1987-07-07 Method for regenerating substrate for magnetic disk Pending JPS6413229A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16913587A JPS6413229A (en) 1987-07-07 1987-07-07 Method for regenerating substrate for magnetic disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16913587A JPS6413229A (en) 1987-07-07 1987-07-07 Method for regenerating substrate for magnetic disk

Publications (1)

Publication Number Publication Date
JPS6413229A true JPS6413229A (en) 1989-01-18

Family

ID=15880932

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16913587A Pending JPS6413229A (en) 1987-07-07 1987-07-07 Method for regenerating substrate for magnetic disk

Country Status (1)

Country Link
JP (1) JPS6413229A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6454527B2 (en) 2000-07-31 2002-09-24 Komatsu Ltd. Noise reduction mechanism of fan device and molding method of porous damping material therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6454527B2 (en) 2000-07-31 2002-09-24 Komatsu Ltd. Noise reduction mechanism of fan device and molding method of porous damping material therefor

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