EP0159221B1 - Bain de décapage chimique pour piéces en alliage résistant à chaud - Google Patents

Bain de décapage chimique pour piéces en alliage résistant à chaud Download PDF

Info

Publication number
EP0159221B1
EP0159221B1 EP85400428A EP85400428A EP0159221B1 EP 0159221 B1 EP0159221 B1 EP 0159221B1 EP 85400428 A EP85400428 A EP 85400428A EP 85400428 A EP85400428 A EP 85400428A EP 0159221 B1 EP0159221 B1 EP 0159221B1
Authority
EP
European Patent Office
Prior art keywords
bath
acid
process according
nickel
oxides
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
Application number
EP85400428A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0159221A1 (fr
Inventor
Robert Lucien Martinou
Michel Meyer Ruimi
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.)
Safran Aircraft Engines SAS
Original Assignee
Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
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 Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA filed Critical Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
Publication of EP0159221A1 publication Critical patent/EP0159221A1/fr
Application granted granted Critical
Publication of EP0159221B1 publication Critical patent/EP0159221B1/fr
Expired 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
    • C23G1/08—Iron or steel
    • C23G1/088—Iron or steel solutions containing organic acids
    • 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
    • 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

Definitions

  • the invention relates to a surface preparation bath, that is to say a chemical dissolution bath, in particular for the removal of oxysulphides for parts of heat-resistant alloy with a nickel or iron base, especially of alloys with a high content of Molybdenum, that is to say comprising from 3.5% to 10% approximately.
  • the usual procedures for removing the hot formed oxides include, after an alkaline degreasing, descaling in an alkaline or acid medium, followed by conditioning of oxides in a potassium permanganate medium plus potassium hydroxide or by passing through a molten soda bath.
  • the final phase of detachment of residual oxides and bleaching is carried out by immersion in hydrofluoric baths. A bath of this type is indicated in document FR-A 1 292 467.
  • the object of the invention is therefore to produce chemical pickling baths, that is to say chemical dissolution and / or deoxysulphurization comprising anions in proportion capable of dissolving the oxides of the metals constituting the alloys and in particular the Molybdenum oxides.
  • baths containing at least four acids were made in a mixture in an aqueous medium and also containing a ferric salt.
  • the invention also aims to provide a method of using these baths for the chemical pickling of oxidized parts during manufacture so as to obtain a satisfactory surface condition for subsequent treatments.
  • the invention also aims to provide a method of using this bath for the chemical pickling of parts covered with oxysulfides and / or oxides after operation.
  • composition of these baths is defined in claims 1 and 2.
  • a method of chemical etching and removal of oxysulfides from nickel-based alloying parts is defined in claim 3.
  • the tolerances indicated correspond, compared to the preferred assembly as indicated, to acceptable variations in concentrations during repeated uses of the bath and which have no effect on its effectiveness.
  • the densities (d) mentioned correspond to the balers usually encountered for commercial products.
  • the H + / N0 3 - ratio was chosen to reduce the passivation of the material during chemical dissolution. Free acidity is very important (12.25N) to activate the surface of the material.
  • This bath is prepared in a tank, preferably with a plastic coating, by introducing the components in the order of the list above: the quantity of water indicated in the tank, the ferric sulfate is added slowly until dissolved complete, hydrochloric acid is slowly poured in small quantities, stirring the solution with a jet of compressed air, then the other three acids are introduced in the same order.
  • the temperature must be monitored and it should not exceed 45 ° C, especially during the introduction of hydrochloric acid in order to prevent possible splashes.
  • the average thickness of the oxides before treatment was, depending on the parts, from 0.010 to 0.030 mm. After two complete cycles, the oxide layer for each of the parts had been completely removed. No significant dissolution of the alloys after removal of the oxides has been observed.
  • the ferric sulphate bath of the invention was used for the deoxysulphurization of Nickel-based alloy turbine blades (NK15CADT) which after 12000 hours of operation were covered with a large deposit of oxysulphides.
  • NK15CADT trade name IN100
  • NK10CAD trade name 81900
  • NC13A trade name INC0713
  • Descaling and deoxysulphurization tests were carried out on parts cracked after operation, in particular distributor vanes made of NW11AC (trade name PD21).
  • the object of the treatment in this case is to prepare the parts with a view to repairing the cracks by diffusion brazing.
  • the preparation of the surfaces for the welding operation consists of a surface removal of material by mechanical treatment. This method of preparation is long and expensive.
  • the use of the bath according to the invention for the elimination of the disturbed layer in a chemical machining operation makes it possible to envisage the reduction of manufacturing costs.
  • the operating range includes an alkaline degreasing of the surface (or equivalent) followed by a depassivation in Hcl medium and finally direct immersion in the bath of the invention for a period of 7 minutes at a temperature of 30 ° C.
  • the parts are then rinsed with water and bleached in a hydrofluoric acid bath for 3 minutes at room temperature. For this temperature and this immersion time in the chemical pickling bath the dissolved thickness was 0.010 mm. It was observed that, even after forgetting the part in the bath and prolonged immersion of 25 minutes where the dissolution was 0.048 mm, the substrate had not undergone any intergranular corrosion.

Landscapes

  • 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)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
EP85400428A 1984-03-09 1985-03-06 Bain de décapage chimique pour piéces en alliage résistant à chaud Expired EP0159221B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8404169A FR2560893B1 (fr) 1984-03-09 1984-03-09 Bain de decapage chimique pour pieces en alliage resistant a chaud
FR8404169 1984-03-09

Publications (2)

Publication Number Publication Date
EP0159221A1 EP0159221A1 (fr) 1985-10-23
EP0159221B1 true EP0159221B1 (fr) 1989-08-16

Family

ID=9302147

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85400428A Expired EP0159221B1 (fr) 1984-03-09 1985-03-06 Bain de décapage chimique pour piéces en alliage résistant à chaud

Country Status (6)

Country Link
US (1) US4707191A (enrdf_load_stackoverflow)
EP (1) EP0159221B1 (enrdf_load_stackoverflow)
JP (1) JPS616287A (enrdf_load_stackoverflow)
CA (1) CA1294856C (enrdf_load_stackoverflow)
DE (1) DE3572369D1 (enrdf_load_stackoverflow)
FR (1) FR2560893B1 (enrdf_load_stackoverflow)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5154774A (en) * 1985-09-19 1992-10-13 Ugine Aciers De Chatillon Et Gueugnon Process for acid pickling of stainless steel products
US4830675A (en) * 1986-06-09 1989-05-16 Skolnik Industries, Inc. Process of koshering containers
US4850378A (en) * 1987-10-14 1989-07-25 Nelson Steel Steel pickling apparatus
US4906301A (en) * 1987-12-08 1990-03-06 Skolnik Industries, Inc. Process of koshering containers
US4956022A (en) * 1988-01-15 1990-09-11 International Business Machines Corporation Chemical polishing of aluminum alloys
JPH0273983A (ja) * 1988-09-07 1990-03-13 Nippon Parkerizing Co Ltd アルミニウム用酸性洗浄液
JP2576667B2 (ja) * 1990-06-06 1997-01-29 三菱電機株式会社 無電解ニッケル膜へのめっきの下地調整方法
JP2593577B2 (ja) * 1990-08-31 1997-03-26 株式会社東芝 コンバインドサイクル発電プラントの運転制御方法およびその運転制御装置
US5232619A (en) * 1990-10-19 1993-08-03 Praxair S.T. Technology, Inc. Stripping solution for stripping compounds of titanium from base metals
FR2673200A1 (fr) * 1991-02-25 1992-08-28 Ugine Aciers Procede de surdecapage de materiaux en acier tels que les aciers inoxydables et les aciers allies.
US5938855A (en) * 1998-01-20 1999-08-17 General Electric Company Method for cleaning a turbine component
US6174380B1 (en) * 1998-12-22 2001-01-16 General Electric Company Method of removing hot corrosion products from a diffusion aluminide coating
JP4334709B2 (ja) * 1999-12-01 2009-09-30 日本ペイント株式会社 熱交換器の化成皮膜用酸性洗浄剤、熱交換器の酸洗方法、熱交換器の処理方法および熱交換器
CN1319711C (zh) * 2001-11-05 2007-06-06 日本碍子株式会社 蜂窝状结构体成形用模具及其制造方法
EP1411149A1 (de) * 2002-10-18 2004-04-21 Siemens Aktiengesellschaft Verfahren zum Entfernen eines Schichtbereichs eines Bauteils
CH705281B1 (de) * 2004-01-29 2013-01-31 Oerlikon Trading Ag Entschichtungsverfahren.
US7077918B2 (en) 2004-01-29 2006-07-18 Unaxis Balzers Ltd. Stripping apparatus and method for removal of coatings on metal surfaces
ATE453739T1 (de) * 2004-01-29 2010-01-15 Oerlikon Trading Ag Entschichtungsverfahren
US20070125459A1 (en) * 2005-12-07 2007-06-07 General Electric Company Oxide cleaning and coating of metallic components
JP4931150B2 (ja) * 2007-06-05 2012-05-16 有限会社小野製作所 電気コネクタの雌形電気コンタクト製造方法及び電気コネクタの雌形電気コンタクト
SG165202A1 (en) * 2009-03-25 2010-10-28 United Technologies Corp Method and apparatus for cleaning a component using microwave radiation
CN105755481A (zh) * 2016-05-20 2016-07-13 黄洪飞 一种金属除锈防锈剂
US10316414B2 (en) * 2016-06-08 2019-06-11 United Technologies Corporation Removing material with nitric acid and hydrogen peroxide solution
US10377968B2 (en) * 2017-06-12 2019-08-13 General Electric Company Cleaning compositions and methods for removing oxides from superalloy substrates
US10830093B2 (en) * 2017-06-13 2020-11-10 General Electric Company System and methods for selective cleaning of turbine engine components
FR3116066B1 (fr) * 2020-11-09 2023-06-09 Institut De Recherche Tech Materiaux Metallurgie Procedes Solution de désanodisation et procédé utilisant une telle solution

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1939241A (en) * 1933-03-08 1933-12-12 Merrimac Chemical Co Pickling stainless steel
BE460366A (enrdf_load_stackoverflow) * 1945-02-23
US2662814A (en) * 1949-08-27 1953-12-15 Diversey Corp Method and composition for chemically polishing metals
US2890944A (en) * 1956-05-25 1959-06-16 North American Aviation Inc Continuous chemical milling process
US2940838A (en) * 1957-08-19 1960-06-14 Boeing Co Chemical milling
US2913360A (en) * 1958-03-20 1959-11-17 Allegheny Ludlum Steel Method of descaling nickel alloys
NL252277A (enrdf_load_stackoverflow) * 1959-06-04
US3011923A (en) * 1960-02-19 1961-12-05 Charles O Coffer Surface treatment of molybdenum metal
FR1292467A (fr) * 1960-05-27 1962-05-04 Gen Electric Procédé de nettoyage chimique des articles métalliques
US3197341A (en) * 1961-06-19 1965-07-27 Rohr Corp Method and composition for descaling stainless steels and related alloys
US3253968A (en) * 1961-10-03 1966-05-31 North American Aviation Inc Etching composition and process
US3460989A (en) * 1964-09-02 1969-08-12 John H Rusch Method of treating ferrous metal surfaces
NL6606730A (enrdf_load_stackoverflow) * 1965-05-17 1966-11-18
US3467599A (en) * 1966-08-08 1969-09-16 Philco Ford Corp Etching solution
US3544356A (en) * 1967-11-01 1970-12-01 Bell Telephone Labor Inc Process for the surface treatment of aluminum and its alloys
SU566866A1 (ru) * 1976-02-13 1977-07-30 Предприятие П/Я Х-5737 Раствор дл травлени алюмини
FR2400069A1 (fr) * 1977-08-12 1979-03-09 Voest Ag Procede de nettoyage de surfaces austenitiques de materiaux, en particulier pour l'elimination des impuretes ferritiques
JPS5624719A (en) * 1979-08-01 1981-03-09 Nissin Electric Co Ltd Actuator for breaker
US4425185A (en) * 1982-03-18 1984-01-10 United Technologies Corporation Method and composition for removing nickel aluminide coatings from nickel superalloys

Also Published As

Publication number Publication date
DE3572369D1 (en) 1989-09-21
FR2560893A1 (fr) 1985-09-13
FR2560893B1 (fr) 1986-09-12
EP0159221A1 (fr) 1985-10-23
JPH0524997B2 (enrdf_load_stackoverflow) 1993-04-09
US4707191A (en) 1987-11-17
JPS616287A (ja) 1986-01-11
CA1294856C (fr) 1992-01-28

Similar Documents

Publication Publication Date Title
EP0159221B1 (fr) Bain de décapage chimique pour piéces en alliage résistant à chaud
EP1314797B1 (en) Chemical removal of a chromium oxide coating from an article
JP4870254B2 (ja) 基体からアルミニドコーティングを除去する方法
US4655383A (en) Method of repairing heat resistant alloy parts
FR2507198A1 (fr) Procede et composition pour eliminer un revetement d'aluminium des substrats en superalliages de nickel
JP4762393B2 (ja) 拡散アルミニドコーティングからの高温腐蝕生成物の除去方法
JP4681733B2 (ja) 基材から断熱被膜を除去する方法
US3607398A (en) Chemical stripping process
NL8102705A (nl) Werkwijze voor het verwijderen van afzetting van een oppervlak.
JP2007186786A (ja) 金属構成部品の酸化物洗浄及び被覆
JPH0225430B2 (enrdf_load_stackoverflow)
US6475289B2 (en) Cleaning of internal passages of airfoils
GB2257395A (en) Etching solution for removing metallic hot gas corrosion protective layers and hot gas reaction coatings from engine blades
CN114392980A (zh) 一种用于去除tbc陶瓷涂层的熔盐制备工艺和清洗工艺
US2311623A (en) Surface treatment for aluminum
JP2003277960A (ja) マグネシウム合金の表面処理方法
RU2200211C2 (ru) Способ удаления покрытий с деталей из жаростойких сплавов
JP2713114B2 (ja) 亜鉛系めっき浴浸漬ロールの使用方法
RU1784661C (ru) Состав дл химической обработки никелевых сплавов
MXPA99012031A (en) Method of removing hot corrosion products from a diffusion aluminide coating
IES980638A2 (en) Method of cleaning metal components
MXPA97004465A (en) Method for removing a divided coating in an alloy based on nic
BE822327A (fr) Revetement anti-corrosion pour des articles en metal ferreux ayant des joints brases et son procede de formation.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19850316

AK Designated contracting states

Designated state(s): BE CH DE FR GB IT LI NL SE

17Q First examination report despatched

Effective date: 19871216

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE FR GB IT LI NL SE

ITF It: translation for a ep patent filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3572369

Country of ref document: DE

Date of ref document: 19890921

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 85400428.0

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

Ref country code: FR

Ref legal event code: CD

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20030212

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20030213

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20030221

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20030305

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20030331

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20030528

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20030604

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040306

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040307

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040331

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040331

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040331

BERE Be: lapsed

Owner name: SOC. NATIONALE D'ETUDE ET DE CONSTRUCTION DE MOTEU

Effective date: 20040331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041001

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041001

GBPC Gb: european patent ceased through non-payment of renewal fee
EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041130

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20041001

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST