DE69012677D1 - Process for the dissolution of oxides deposited on a substrate and use for decontamination. - Google Patents

Process for the dissolution of oxides deposited on a substrate and use for decontamination.

Info

Publication number
DE69012677D1
DE69012677D1 DE69012677T DE69012677T DE69012677D1 DE 69012677 D1 DE69012677 D1 DE 69012677D1 DE 69012677 T DE69012677 T DE 69012677T DE 69012677 T DE69012677 T DE 69012677T DE 69012677 D1 DE69012677 D1 DE 69012677D1
Authority
DE
Germany
Prior art keywords
decontamination
etching
dissolution
substrate
oxides deposited
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 - Lifetime
Application number
DE69012677T
Other languages
German (de)
Other versions
DE69012677T2 (en
Inventor
Didier Noel
Jacques Gregoire
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.)
Electricite de France SA
Original Assignee
Electricite de France SA
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 Electricite de France SA filed Critical Electricite de France SA
Application granted granted Critical
Publication of DE69012677D1 publication Critical patent/DE69012677D1/en
Publication of DE69012677T2 publication Critical patent/DE69012677T2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/001—Decontamination of contaminated objects, apparatus, clothes, food; Preventing contamination thereof
    • G21F9/002—Decontamination of the surface of objects with chemical or electrochemical processes
    • G21F9/004—Decontamination of the surface of objects with chemical or electrochemical processes of metallic surfaces

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Electrochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

Process for dissolving oxide deposited on a metal substrate. This process comprises the following stages: a) etching with an oxidising solution containing a permanganate anion at a pH of between 2 and 6, preferably between 2 and 4, the etching period being chosen so that the exponential stage is finished, the oxidising solution also containing a sulphate ion at a concentration of between 10<-2> and 10<-5>, preferably between 10<-3> and 10<-4>N; b) a reductive etching by means of an easily degradable organic compound. Application to the decontamination of components of nuclear power stations. <IMAGE>
DE69012677T 1989-06-27 1990-06-26 Process for the dissolution of oxides deposited on a substrate and use for decontamination. Expired - Lifetime DE69012677T2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8908524A FR2648946B1 (en) 1989-06-27 1989-06-27 PROCESS FOR THE DISSOLUTION OF OXIDE DEPOSITED ON A METAL SUBSTRATE AND ITS APPLICATION TO DECONTAMINATION

Publications (2)

Publication Number Publication Date
DE69012677D1 true DE69012677D1 (en) 1994-10-27
DE69012677T2 DE69012677T2 (en) 1995-03-16

Family

ID=9383147

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69012677T Expired - Lifetime DE69012677T2 (en) 1989-06-27 1990-06-26 Process for the dissolution of oxides deposited on a substrate and use for decontamination.

Country Status (6)

Country Link
EP (1) EP0406098B1 (en)
AT (1) ATE112089T1 (en)
DE (1) DE69012677T2 (en)
ES (1) ES2064683T3 (en)
FR (1) FR2648946B1 (en)
ZA (1) ZA904913B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2699936B1 (en) * 1992-12-24 1995-01-27 Electricite De France Process for dissolving oxides deposited on a metal substrate.
DE19818772C2 (en) * 1998-04-27 2000-05-31 Siemens Ag Process for reducing the radioactivity of a metal part
JP3977963B2 (en) 1999-09-09 2007-09-19 株式会社日立製作所 Chemical decontamination method
FR2850673B1 (en) * 2003-02-04 2006-09-08 Electricite De France METHOD OF DISSOLVING OXIDES DEPOSITED ON A STELLITE METAL SUBSTRATE
US10056163B2 (en) 2011-09-20 2018-08-21 Siempelkamp NIS Ingenieurgesellschaft mbH Method for dissolving an oxide layer
DE102013102331B3 (en) 2013-03-08 2014-07-03 Horst-Otto Bertholdt Process for breaking down an oxide layer
DE102016104846B3 (en) 2016-03-16 2017-08-24 Areva Gmbh A method of treating waste water from decontamination of a metal surface, waste water treatment apparatus and use of the waste water treatment apparatus
EP4269657A1 (en) * 2022-04-29 2023-11-01 Technochim SA Method for dissolving metal oxides from life sciences equipment

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4481040A (en) * 1981-06-17 1984-11-06 Central Electricity Generating Board Of Sudbury House Process for the chemical dissolution of oxide deposits
SE435329B (en) * 1983-02-09 1984-09-17 Studsvik Energiteknik Ab DECOMINATION OF PRESSURE WATER REACTORS
GB2191329B (en) * 1986-06-04 1989-12-13 British Nuclear Fuels Plc Decontamination of surfaces
BE904936A (en) * 1986-06-17 1986-10-16 Lemmens Godfried PROCESS FOR THE DECONTAMINATION OF RADIOACTIVALLY CONTAMINATED MATERIALS.

Also Published As

Publication number Publication date
FR2648946B1 (en) 1994-02-04
ES2064683T3 (en) 1995-02-01
DE69012677T2 (en) 1995-03-16
ATE112089T1 (en) 1994-10-15
EP0406098A1 (en) 1991-01-02
EP0406098B1 (en) 1994-09-21
ZA904913B (en) 1991-05-29
FR2648946A1 (en) 1990-12-28

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Legal Events

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8364 No opposition during term of opposition