ES2064683T3 - DISSOLUTION PROCEDURE OF OXIDE DEPOSITED ON A METALLIC SUBSTRATE AND ITS APPLICATION TO DECONTAMINATION. - Google Patents

DISSOLUTION PROCEDURE OF OXIDE DEPOSITED ON A METALLIC SUBSTRATE AND ITS APPLICATION TO DECONTAMINATION.

Info

Publication number
ES2064683T3
ES2064683T3 ES90401826T ES90401826T ES2064683T3 ES 2064683 T3 ES2064683 T3 ES 2064683T3 ES 90401826 T ES90401826 T ES 90401826T ES 90401826 T ES90401826 T ES 90401826T ES 2064683 T3 ES2064683 T3 ES 2064683T3
Authority
ES
Spain
Prior art keywords
decontamination
application
oxide deposited
metallic substrate
etching
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
ES90401826T
Other languages
Spanish (es)
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 ES2064683T3 publication Critical patent/ES2064683T3/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)
  • 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)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (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>
ES90401826T 1989-06-27 1990-06-26 DISSOLUTION PROCEDURE OF OXIDE DEPOSITED ON A METALLIC SUBSTRATE AND ITS APPLICATION TO DECONTAMINATION. Expired - Lifetime ES2064683T3 (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
ES2064683T3 true ES2064683T3 (en) 1995-02-01

Family

ID=9383147

Family Applications (1)

Application Number Title Priority Date Filing Date
ES90401826T Expired - Lifetime ES2064683T3 (en) 1989-06-27 1990-06-26 DISSOLUTION PROCEDURE OF OXIDE DEPOSITED ON A METALLIC SUBSTRATE AND ITS APPLICATION TO 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
EP2758966B1 (en) 2011-09-20 2016-03-16 Horst-Otto Bertholdt 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
EP4269657B1 (en) * 2022-04-29 2025-06-04 Technochim SA Method for dissolving metal oxides from life sciences equipment
FR3143177B1 (en) 2022-12-07 2024-12-13 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
ATE18822T1 (en) * 1981-06-17 1986-04-15 Central Electr Generat Board PROCESSES FOR THE CHEMICAL DECOMPOSITION 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
ATE112089T1 (en) 1994-10-15
EP0406098A1 (en) 1991-01-02
DE69012677D1 (en) 1994-10-27
ZA904913B (en) 1991-05-29
DE69012677T2 (en) 1995-03-16
EP0406098B1 (en) 1994-09-21
FR2648946A1 (en) 1990-12-28
FR2648946B1 (en) 1994-02-04

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