GB843100A - Improvements in the cleaning of metal surfaces - Google Patents

Improvements in the cleaning of metal surfaces

Info

Publication number
GB843100A
GB843100A GB134856A GB134856A GB843100A GB 843100 A GB843100 A GB 843100A GB 134856 A GB134856 A GB 134856A GB 134856 A GB134856 A GB 134856A GB 843100 A GB843100 A GB 843100A
Authority
GB
United Kingdom
Prior art keywords
acid
water
insoluble
inert
composition
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
GB134856A
Inventor
John Kempton Aiken
Donald Kearey Howard
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.)
Geigy Co Ltd
Original Assignee
Geigy 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 Geigy Co Ltd filed Critical Geigy Co Ltd
Priority to GB134856A priority Critical patent/GB843100A/en
Publication of GB843100A publication Critical patent/GB843100A/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
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/025—Cleaning or pickling metallic material with solutions or molten salts with acid solutions acidic pickling pastes

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)
  • Detergent Compositions (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

A process for cleaning steel surfaces comprises applying to the surface a composition, suitably in the form of a paste, containing (a) hydrofluoric acid and (b) an inert material having no wetting properties, or inhibiting properties against base metal attack by the free acid, e.g. a water-insoluble inert inorganic compound, such as a water-insoluble fluoride, for example magnesium, strontium, barium, lead or, preferably, calcium fluoride, carbon black or graphite, or an organic compound such as paaffin wax or powdered polyethylene. The acid may be concentrated or dilute, and in the case where the acid concentration is not more than 20% (b) may additionally be an organic water-soluble thickening agent such as polyvinyl alcohol or gum tragacanth. In general it is preferred to use equal parts by weight of (a) and (b), but a suitable range of proportions is 1 : 3 to 3 : 1. The composition desirably also contains 0.1-5% of a wetting agent, preferably a condensate of 9 moles of ethylene oxide with 1 mole of a sec.-alcohol containing 16 carbon atoms; a corrosion inhibitor such as tolyl thiourea, may also be included. After use the acid is preferably neutralized on the surface by the application of sodium hydroxide, carbonate, bicarbonate or phosphate together, if desired, with an inert filler as at (b) above.
GB134856A 1956-01-14 1956-01-14 Improvements in the cleaning of metal surfaces Expired GB843100A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB134856A GB843100A (en) 1956-01-14 1956-01-14 Improvements in the cleaning of metal surfaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB134856A GB843100A (en) 1956-01-14 1956-01-14 Improvements in the cleaning of metal surfaces

Publications (1)

Publication Number Publication Date
GB843100A true GB843100A (en) 1960-08-04

Family

ID=9720436

Family Applications (1)

Application Number Title Priority Date Filing Date
GB134856A Expired GB843100A (en) 1956-01-14 1956-01-14 Improvements in the cleaning of metal surfaces

Country Status (1)

Country Link
GB (1) GB843100A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2527642A1 (en) * 1982-05-25 1983-12-02 Cezus Co Europ Zirconium Selective chemical machining of metals - using nitric-hydrofluoric acid soln. with paste-forming addns.
EP0101126A2 (en) * 1982-08-18 1984-02-22 Metallgesellschaft Ag Process for treating waste pickling pastes
WO2015001294A1 (en) * 2013-07-05 2015-01-08 Xeros Limited Method of treating a metal substrate

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2527642A1 (en) * 1982-05-25 1983-12-02 Cezus Co Europ Zirconium Selective chemical machining of metals - using nitric-hydrofluoric acid soln. with paste-forming addns.
EP0101126A2 (en) * 1982-08-18 1984-02-22 Metallgesellschaft Ag Process for treating waste pickling pastes
EP0101126A3 (en) * 1982-08-18 1984-03-21 Metallgesellschaft Ag Process for treating waste pickling pastes
US4478647A (en) * 1982-08-18 1984-10-23 Parker Chemical Company Process for the treatment of spent pickling paste
WO2015001294A1 (en) * 2013-07-05 2015-01-08 Xeros Limited Method of treating a metal substrate

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