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FR2400069A1 - Cleaning steel surface by removing ferrite material - by rinsing with dil. nitric acid, blasting with corundum particles and rinsing with dil. nitric acid - Google Patents

Cleaning steel surface by removing ferrite material - by rinsing with dil. nitric acid, blasting with corundum particles and rinsing with dil. nitric acid

Info

Publication number
FR2400069A1
FR2400069A1 FR7724889A FR7724889A FR2400069A1 FR 2400069 A1 FR2400069 A1 FR 2400069A1 FR 7724889 A FR7724889 A FR 7724889A FR 7724889 A FR7724889 A FR 7724889A FR 2400069 A1 FR2400069 A1 FR 2400069A1
Authority
FR
France
Prior art keywords
dil
rinsing
nitric acid
corundum
blasting
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.)
Granted
Application number
FR7724889A
Other languages
French (fr)
Other versions
FR2400069B1 (en
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.)
Voestalpine AG
Vereinigte Osterreichische Eisen und Stahlwerke AG
Original Assignee
Voestalpine AG
Vereinigte Osterreichische Eisen und Stahlwerke AG
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 Voestalpine AG, Vereinigte Osterreichische Eisen und Stahlwerke AG filed Critical Voestalpine AG
Priority to FR7724889A priority Critical patent/FR2400069A1/en
Publication of FR2400069A1 publication Critical patent/FR2400069A1/en
Application granted granted Critical
Publication of FR2400069B1 publication Critical patent/FR2400069B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

L'invention concerne des perfectionnements apportés à un procédé de nettoyage décrit. Selon l'invention, le mélange de corindon et de liquide présente une proportion de corindon de 40 à 90 % en volume, la pression de gaz est de 2,5 atmosphères au minimum et de 5,5 atmosphères au maximum et que la grosseur moyenne de grains de la fraction de corindon présentant un habitus triangulaire est de 0,2 à 0,6 mm, la quantité de corindon nécessaire dans le mélange de corindon et de liquide étant de 0,8 à 3 kg par 100 cm**2 de surface à nettoyer. Le perfectionnement permet de diminuer et même d'exclure le bouchage des fissures existantes.The invention relates to improvements to a described cleaning method. According to the invention, the mixture of corundum and liquid has a corundum proportion of 40 to 90% by volume, the gas pressure is at least 2.5 atmospheres and at most 5.5 atmospheres and that the average size of grains of the corundum fraction exhibiting a triangular habitus is 0.2 to 0.6 mm, the quantity of corundum required in the mixture of corundum and liquid being 0.8 to 3 kg per 100 cm ** 2 of surface to be cleaned. The improvement makes it possible to reduce and even exclude the plugging of existing cracks.

FR7724889A 1977-08-12 1977-08-12 Cleaning steel surface by removing ferrite material - by rinsing with dil. nitric acid, blasting with corundum particles and rinsing with dil. nitric acid Granted FR2400069A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7724889A FR2400069A1 (en) 1977-08-12 1977-08-12 Cleaning steel surface by removing ferrite material - by rinsing with dil. nitric acid, blasting with corundum particles and rinsing with dil. nitric acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7724889A FR2400069A1 (en) 1977-08-12 1977-08-12 Cleaning steel surface by removing ferrite material - by rinsing with dil. nitric acid, blasting with corundum particles and rinsing with dil. nitric acid

Publications (2)

Publication Number Publication Date
FR2400069A1 true FR2400069A1 (en) 1979-03-09
FR2400069B1 FR2400069B1 (en) 1982-09-24

Family

ID=9194514

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7724889A Granted FR2400069A1 (en) 1977-08-12 1977-08-12 Cleaning steel surface by removing ferrite material - by rinsing with dil. nitric acid, blasting with corundum particles and rinsing with dil. nitric acid

Country Status (1)

Country Link
FR (1) FR2400069A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2560893A1 (en) * 1984-03-09 1985-09-13 Snecma CHEMICAL STRIPPING BATH FOR HOT-RESISTANT ALLOY PARTS
DE4221666C1 (en) * 1992-07-02 1994-01-27 Alba Ind & Umweltschutzservice Method for opening bodies contg. explosive material - uses compressed water jet with integrated mineral and/or metal grinding particles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2560893A1 (en) * 1984-03-09 1985-09-13 Snecma CHEMICAL STRIPPING BATH FOR HOT-RESISTANT ALLOY PARTS
EP0159221A1 (en) * 1984-03-09 1985-10-23 Societe Nationale D'etude Et De Construction De Moteurs D'aviation, "S.N.E.C.M.A." Chemical pickling bath for heat-resisting alloys
US4707191A (en) * 1984-03-09 1987-11-17 Societe Nationale D'etude Et De Construction De Moteurs D'aviation (Snecma) Pickling process for heat-resistant alloy articles
DE4221666C1 (en) * 1992-07-02 1994-01-27 Alba Ind & Umweltschutzservice Method for opening bodies contg. explosive material - uses compressed water jet with integrated mineral and/or metal grinding particles

Also Published As

Publication number Publication date
FR2400069B1 (en) 1982-09-24

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Legal Events

Date Code Title Description
CD Change of name or company name
ST Notification of lapse