GB713909A - Improvements relating to the removal of oxide scale from metal surfaces - Google Patents

Improvements relating to the removal of oxide scale from metal surfaces

Info

Publication number
GB713909A
GB713909A GB20044/52A GB2004452A GB713909A GB 713909 A GB713909 A GB 713909A GB 20044/52 A GB20044/52 A GB 20044/52A GB 2004452 A GB2004452 A GB 2004452A GB 713909 A GB713909 A GB 713909A
Authority
GB
United Kingdom
Prior art keywords
per cent
sodium
per
gns
oxide scale
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
GB20044/52A
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.)
Mond Nickel Co Ltd
Original Assignee
Mond Nickel Co Ltd
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 Mond Nickel Co Ltd filed Critical Mond Nickel Co Ltd
Publication of GB713909A publication Critical patent/GB713909A/en
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
    • C23G1/28—Cleaning or pickling metallic material with solutions or molten salts with molten salts
    • C23G1/32—Heavy metals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4981—Utilizing transitory attached element or associated separate material
    • Y10T29/49812—Temporary protective coating, impregnation, or cast layer

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)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Treating Waste Gases (AREA)

Abstract

Oxide scale is removed from metals resistant to alkali by immersion in a fused salt bath of which sodium flouride and sodium carbonate constitute at least 90 per cent. by weight and the ratio thereof is between 4 : 1 and 1 : 4. The bath preferably consists solely of sodium fluoride and sodium carbonate but may contain up to 5 per cent. in all of alkali metal chlorides and hydroxides, up to 2 per cent. of barium chloride and up to 2 per cent. of fluorspar and cryolite. The bath may be used at 1500-2000 DEG F. In an example, an alloy of Cu 30 per cent., Mn 1 per cent. Fe 1.4 per cent., Ni remainder is immersed in a salt bath consisting of 50 per cent. each of sodium flouride and sodium carbonate, dipped in dilute sulphuric acid and then dipped in a pickling solution containing 95 gns. per litre sulphuric acid, 65 gns. per litre sodium nitrate, 110 gns. per litre sodium chloride and 30 gns. per litre cupric chloride.
GB20044/52A 1951-08-09 1952-08-08 Improvements relating to the removal of oxide scale from metal surfaces Expired GB713909A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US241162A US2710271A (en) 1951-08-09 1951-08-09 Process for annealing and cleaning oxidized metal in a salt bath

Publications (1)

Publication Number Publication Date
GB713909A true GB713909A (en) 1954-08-18

Family

ID=22909505

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20044/52A Expired GB713909A (en) 1951-08-09 1952-08-08 Improvements relating to the removal of oxide scale from metal surfaces

Country Status (2)

Country Link
US (1) US2710271A (en)
GB (1) GB713909A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0128682A1 (en) * 1983-06-10 1984-12-19 Inco Alloys International, Inc. Method for removing glass lubricants from extrusions

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2950526A (en) * 1957-04-22 1960-08-30 William J Buehler Elevated temperature working of metals and alloys
DE2240658A1 (en) * 1972-08-18 1974-02-28 Degussa PROCESS FOR THE DEOXYDATION OF REFRACTORY METALS, IN PARTICULAR FOR THE DEOXYDATION OF NIOB AND TANTALUM
US5830291C1 (en) * 1996-04-19 2001-05-22 J & L Specialty Steel Inc Method for producing bright stainless steel
EP1411149A1 (en) * 2002-10-18 2004-04-21 Siemens Aktiengesellschaft Process for stripping coatings from components
EP1559485A1 (en) * 2004-01-30 2005-08-03 Siemens Aktiengesellschaft Method for removing a layer

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1989884A (en) * 1932-05-11 1935-02-05 Youngstown Sheet And Tube Co Method of annealing and cleaning ferrous articles
US2120494A (en) * 1935-09-25 1938-06-14 Keystone Steel & Wire Co Method of cleaning metal articles
US2237434A (en) * 1937-11-30 1941-04-08 Holden Heat treatment bath
US2370959A (en) * 1942-03-04 1945-03-06 Artemas F Holden Method of heat treatment for wire drawing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0128682A1 (en) * 1983-06-10 1984-12-19 Inco Alloys International, Inc. Method for removing glass lubricants from extrusions

Also Published As

Publication number Publication date
US2710271A (en) 1955-06-07

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