ATE112089T1 - PROCESS FOR DISSOLVING OXIDES DEPOSITED ON A SUBSTRATE AND USE FOR DECONTAMINATION. - Google Patents

PROCESS FOR DISSOLVING OXIDES DEPOSITED ON A SUBSTRATE AND USE FOR DECONTAMINATION.

Info

Publication number
ATE112089T1
ATE112089T1 AT90401826T AT90401826T ATE112089T1 AT E112089 T1 ATE112089 T1 AT E112089T1 AT 90401826 T AT90401826 T AT 90401826T AT 90401826 T AT90401826 T AT 90401826T AT E112089 T1 ATE112089 T1 AT E112089T1
Authority
AT
Austria
Prior art keywords
decontamination
etching
substrate
oxides deposited
dissolving oxides
Prior art date
Application number
AT90401826T
Other languages
German (de)
Inventor
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
Application filed by Electricite De France filed Critical Electricite De France
Application granted granted Critical
Publication of ATE112089T1 publication Critical patent/ATE112089T1/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
    • 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)
  • Food Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (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)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Oxygen, Ozone, And Oxides In General (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>
AT90401826T 1989-06-27 1990-06-26 PROCESS FOR DISSOLVING OXIDES DEPOSITED ON A SUBSTRATE AND USE FOR DECONTAMINATION. ATE112089T1 (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 (1)

Publication Number Publication Date
ATE112089T1 true ATE112089T1 (en) 1994-10-15

Family

ID=9383147

Family Applications (1)

Application Number Title Priority Date Filing Date
AT90401826T ATE112089T1 (en) 1989-06-27 1990-06-26 PROCESS FOR DISSOLVING 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 (9)

* 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
WO2013041595A1 (en) * 2011-09-20 2013-03-28 Nis Ingenieurgesellschaft Mbh Method for decomposing 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
FR3143177A1 (en) 2022-12-07 2024-06-14 Electricite De France Process for dissolving oxides containing silver and cobalt contamination on a metal substrate

Family Cites Families (4)

* 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
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
EP0406098A1 (en) 1991-01-02
FR2648946B1 (en) 1994-02-04
DE69012677T2 (en) 1995-03-16
ZA904913B (en) 1991-05-29
DE69012677D1 (en) 1994-10-27
FR2648946A1 (en) 1990-12-28
EP0406098B1 (en) 1994-09-21
ES2064683T3 (en) 1995-02-01

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