GB1062363A - Removing rust and scale from iron and steel - Google Patents

Removing rust and scale from iron and steel

Info

Publication number
GB1062363A
GB1062363A GB474166A GB474166A GB1062363A GB 1062363 A GB1062363 A GB 1062363A GB 474166 A GB474166 A GB 474166A GB 474166 A GB474166 A GB 474166A GB 1062363 A GB1062363 A GB 1062363A
Authority
GB
United Kingdom
Prior art keywords
acid
alkali metal
iron
sorbitol
acids
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
GB474166A
Inventor
Friedrich Fuchs
Klaus Wiebusch
Heinrich Mertens
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.)
BASF SE
Original Assignee
BASF SE
Badische Anilin and Sodafabrik 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 BASF SE, Badische Anilin and Sodafabrik AG filed Critical BASF SE
Publication of GB1062363A publication Critical patent/GB1062363A/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
    • C23G1/24—Cleaning or pickling metallic material with solutions or molten salts with neutral solutions

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)

Abstract

A pickling solution (pH 4 to 9) for removing rust from iron and steel contains an a-aminocarboxylic acid having at least one group with a formula <FORM:1062363/C6-C7/1> in which X denotes the radical -CH2-CH2-OH or -CH2-COOH and/or an alkali metal salt of such an acid, and a polyalcohol having at least four hydroxyl groups but no aldehyde groups e.g. erythritol, adenitol, arabitol, hexitols, xylitol, sorbitol, dulcitol, mannitol, and pentaerythritol. A reducing agent, e.g. alkali metal sulphites, bisulphites and dithionites and alkali metal salts of a-hydroxyalkenesulphinic acids and a-aminoalkenesulphinic acids. In an example 100g. of the tetrasodium salt of ethylenediaminotetracetic acid, and 100g. of sorbitol are dissolved in 1 litre of water, and the pH adjusted to 5 with sulphinic acid or sodium hydrogen sulphate.
GB474166A 1965-02-04 1966-02-03 Removing rust and scale from iron and steel Expired GB1062363A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB0080367 1965-02-04

Publications (1)

Publication Number Publication Date
GB1062363A true GB1062363A (en) 1967-03-22

Family

ID=6980686

Family Applications (1)

Application Number Title Priority Date Filing Date
GB474166A Expired GB1062363A (en) 1965-02-04 1966-02-03 Removing rust and scale from iron and steel

Country Status (2)

Country Link
BE (1) BE676011A (en)
GB (1) GB1062363A (en)

Also Published As

Publication number Publication date
BE676011A (en) 1966-08-03

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