TW366369B - Process for dissolving oxides deposited on a metal substrate - Google Patents

Process for dissolving oxides deposited on a metal substrate

Info

Publication number
TW366369B
TW366369B TW083102704A TW83102704A TW366369B TW 366369 B TW366369 B TW 366369B TW 083102704 A TW083102704 A TW 083102704A TW 83102704 A TW83102704 A TW 83102704A TW 366369 B TW366369 B TW 366369B
Authority
TW
Taiwan
Prior art keywords
metal substrate
oxides deposited
dissolving oxides
action
temperature
Prior art date
Application number
TW083102704A
Other languages
Chinese (zh)
Inventor
Henri Spychala
Didier Noel
Jacques Gregoire
Original Assignee
Electricite De France
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
Priority claimed from FR9215722A external-priority patent/FR2699936B1/en
Application filed by Electricite De France filed Critical Electricite De France
Application granted granted Critical
Publication of TW366369B publication Critical patent/TW366369B/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts

Landscapes

  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

The invention relates to a process for dissolving oxides deposited on a metal substrate. The object of the invention is to decontaminate substrates polluted by deposits of radioactive materials, without having any significant etching action on the substrate. This object is achieved by a process which comprises at least one cycle consisting of: (a) performing an oxidizing action using a solution containing at least permanganate, at a temperature between 80 and 85 DEG C, (b) performing a reducing action by means of a solution incorporating a reducing agent and nitric acid, at a pH below 2 and at a temperature between 80 and 85 DEG C.
TW083102704A 1992-12-24 1994-03-28 Process for dissolving oxides deposited on a metal substrate TW366369B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9215722A FR2699936B1 (en) 1992-12-24 1992-12-24 Process for dissolving oxides deposited on a metal substrate.

Publications (1)

Publication Number Publication Date
TW366369B true TW366369B (en) 1999-08-11

Family

ID=57941095

Family Applications (1)

Application Number Title Priority Date Filing Date
TW083102704A TW366369B (en) 1992-12-24 1994-03-28 Process for dissolving oxides deposited on a metal substrate

Country Status (2)

Country Link
KR (1) KR100313971B1 (en)
TW (1) TW366369B (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0071336B1 (en) * 1981-06-17 1986-03-26 Central Electricity Generating Board Process for the chemical dissolution of oxide deposits

Also Published As

Publication number Publication date
KR960700360A (en) 1996-01-20
KR100313971B1 (en) 2002-02-28

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Legal Events

Date Code Title Description
MK4A Expiration of patent term of an invention patent