DE69711090D1 - METHOD FOR TREATING IRON-CONTAINING METAL ALLOYS AND TITANIUM AND ITS ALLOYS - Google Patents

METHOD FOR TREATING IRON-CONTAINING METAL ALLOYS AND TITANIUM AND ITS ALLOYS

Info

Publication number
DE69711090D1
DE69711090D1 DE69711090T DE69711090T DE69711090D1 DE 69711090 D1 DE69711090 D1 DE 69711090D1 DE 69711090 T DE69711090 T DE 69711090T DE 69711090 T DE69711090 T DE 69711090T DE 69711090 D1 DE69711090 D1 DE 69711090D1
Authority
DE
Germany
Prior art keywords
titanium
alloys
acid
containing metal
pickling
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 - Fee Related
Application number
DE69711090T
Other languages
German (de)
Other versions
DE69711090T2 (en
Inventor
Franco Mancia
Sandro Fortunati
Ezio Novaro
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.)
Acciai Speciali Terni SpA
Original Assignee
Acciai Speciali Terni SpA
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 Acciai Speciali Terni SpA filed Critical Acciai Speciali Terni SpA
Application granted granted Critical
Publication of DE69711090D1 publication Critical patent/DE69711090D1/en
Publication of DE69711090T2 publication Critical patent/DE69711090T2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
    • C25F1/02—Pickling; Descaling
    • C25F1/04—Pickling; Descaling in solution
    • C25F1/06—Iron or steel
    • 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
    • C23G1/08—Iron or steel
    • C23G1/086—Iron or steel solutions containing HF
    • 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
    • C23G1/10—Other heavy metals
    • C23G1/106—Other heavy metals refractory metals
    • 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
    • C23G1/36—Regeneration of waste pickling liquors
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
    • C25F1/02—Pickling; Descaling
    • C25F1/04—Pickling; Descaling in solution
    • C25F1/08—Refractory metals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Electrochemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Electrolytic Production Of Metals (AREA)

Abstract

A method for pickling products made of metal alloys containing iron, and products made of titanium and alloys thereof, in the absence of nitric acid as an oxidising agent, characterised by the fact that the product to be pickled is submerged in the anolyte (as the pickling solution) of an electrolytic cell in which the anolyte is made up of an aqueous solution of sulphuric acid, of hydrofluoric acid and optionally of phosphoric acid and hydrochloric acid, and with the catholyte made up of an aqueous solution of sulphuric acid and the oxidising agent in the pickling solution being the ferric ion, or the ions titanium(III) and titanium(IV).
DE69711090T 1996-12-09 1997-12-05 METHOD FOR TREATING IRON-CONTAINING METAL ALLOYS AND TITANIUM AND ITS ALLOYS Expired - Fee Related DE69711090T2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT96RM000849A IT1288407B1 (en) 1996-12-09 1996-12-09 METHOD FOR PICKLING METAL ALLOY PRODUCTS CONTAINING IRON AND TITANIUM AND ITS ALLOYS
PCT/IT1997/000300 WO1998026111A1 (en) 1996-12-09 1997-12-05 Method for pickling products in a metal alloy containing iron and in titanium and alloys thereof

Publications (2)

Publication Number Publication Date
DE69711090D1 true DE69711090D1 (en) 2002-04-18
DE69711090T2 DE69711090T2 (en) 2003-07-24

Family

ID=11404582

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69711090T Expired - Fee Related DE69711090T2 (en) 1996-12-09 1997-12-05 METHOD FOR TREATING IRON-CONTAINING METAL ALLOYS AND TITANIUM AND ITS ALLOYS

Country Status (9)

Country Link
EP (1) EP0960221B1 (en)
AT (1) ATE214436T1 (en)
AU (1) AU7847898A (en)
DE (1) DE69711090T2 (en)
ES (1) ES2178023T3 (en)
IT (1) IT1288407B1 (en)
TW (1) TW451001B (en)
WO (1) WO1998026111A1 (en)
ZA (1) ZA9710983B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1297076B1 (en) * 1997-11-24 1999-08-03 Acciai Speciali Terni Spa METHOD FOR PICKLING OF STEEL PRODUCTS
IT1302202B1 (en) 1998-09-11 2000-07-31 Henkel Kgaa ELECTROLYTIC PICKLING PROCESS WITH SOLUTIONS FREE FROM ACIDONITRICO.
DE19850524C2 (en) * 1998-11-03 2002-04-04 Eilenburger Elektrolyse & Umwelttechnik Gmbh Nitrate-free recycling pickling process for stainless steels
AT406486B (en) * 1998-12-22 2000-05-25 Andritz Patentverwaltung METHOD FOR STAINLESSING STAINLESS STEEL
IT1312556B1 (en) * 1999-05-03 2002-04-22 Henkel Kgaa STAINLESS STEEL PICKLING PROCESS IN THE ABSENCE OF ACIDONITRICO AND IN THE PRESENCE OF CHLORIDE IONS
ES2350095T3 (en) 2002-10-15 2011-01-18 HENKEL AG & CO. KGAA SOLUTION AND DECAPING PROCEDURE FOR STAINLESS STEEL.
EP1980650A1 (en) * 2007-04-05 2008-10-15 Kerma S.A. Pickling composition free from nitrates and peroxides, and method using such a composition
CN103572303B (en) * 2013-10-24 2015-11-25 中联重机股份有限公司 A kind of steel chemical pre-processing method and pickle solution used
CN111057935B (en) * 2019-12-25 2021-04-02 浦项(张家港)不锈钢股份有限公司 Preparation method of heat-resistant stainless steel
CN113788520A (en) * 2021-10-08 2021-12-14 北京首钢吉泰安新材料有限公司 Iron-chromium-aluminum pickling process, wastewater treatment method and wastewater treatment device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50133125A (en) * 1974-04-10 1975-10-22
DE3937438C2 (en) * 1989-02-23 1998-01-29 Wilfried Simmer Steel pickling process
FR2650303B1 (en) * 1989-07-26 1993-12-10 Ugine Aciers Chatillon Gueugnon PROCESS FOR ACIDIC STRIPPING OF METAL PRODUCTS CONTAINING TITANIUM OR AT LEAST ONE CHEMICAL ELEMENT OF THE TITANIUM FAMILY
JPH04362183A (en) * 1991-06-07 1992-12-15 Nippon Paint Co Ltd Method for regenerating aluminum surface cleaning bath
IT1282979B1 (en) * 1996-05-09 1998-04-03 Novamax Itb S R L PROCEDURE FOR STEEL PICKLING IN WHICH THE OXIDATION OF THE FERROUS ION IS CARRIED OUT BY ELECTROCHEMISTRY

Also Published As

Publication number Publication date
ZA9710983B (en) 1998-06-15
ITRM960849A0 (en) 1996-12-09
WO1998026111A1 (en) 1998-06-18
TW451001B (en) 2001-08-21
EP0960221A1 (en) 1999-12-01
ATE214436T1 (en) 2002-03-15
IT1288407B1 (en) 1998-09-22
AU7847898A (en) 1998-07-03
DE69711090T2 (en) 2003-07-24
ITRM960849A1 (en) 1998-06-09
ES2178023T3 (en) 2002-12-16
EP0960221B1 (en) 2002-03-13

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Legal Events

Date Code Title Description
8332 No legal effect for de
8327 Change in the person/name/address of the patent owner

Owner name: THYSSENKRUPP ACCIAI SPECIALI TERNI S.P.A., TERNI,

8370 Indication related to discontinuation of the patent is to be deleted
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee