GB532661A - Improvements in or relating to the cleaning and pickling of metals and to compositions for use therein - Google Patents

Improvements in or relating to the cleaning and pickling of metals and to compositions for use therein

Info

Publication number
GB532661A
GB532661A GB1193639A GB1193639A GB532661A GB 532661 A GB532661 A GB 532661A GB 1193639 A GB1193639 A GB 1193639A GB 1193639 A GB1193639 A GB 1193639A GB 532661 A GB532661 A GB 532661A
Authority
GB
United Kingdom
Prior art keywords
sulphamic acid
pickling
paste
weight
cleaning
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
GB1193639A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to GB1193639A priority Critical patent/GB532661A/en
Publication of GB532661A publication Critical patent/GB532661A/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

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

532,661. Pickling ; cleansing compositions. DU PONT DE NEMOURS & CO., E. I., and HUNT, J. K. April 20, 1939, No. 11936. [Class 82 (ii)] [Also in Group III] A process for cleaning and pickling metal and other surfaces contaminated with rust or other metallic oxides comprises applying to the said surfaces a composition consisting of an aqueous solution of a water-soluble compound containing the sulphamic acid radicle NH 2 SO 3 , e.g. ammonium sulphamate or sulphamic acid. The solution may also include an inhibitor and/or a wetting agent such as alkaline soaps of fatty acids or turkey red oil. The solution may be converted into the form of a paste by adding a bodying agent such as glycerol or colloidal minerals, e.g. clay. Abrasives may also be. added. The paste is applied to the surface to be treated, preferably with a damp cloth. For pickling metals such as copper, brass, iron or steel, solutions of sulphamic acid are used preferably with the addition of an inhibitor such as cinchona bark alkaloid or pyridine derivatives or thioureas. An example of such a bath is one containing ten per cent. by weight of sulphamic acid and 0.025 per cent. by weight of sulphurized quinodine, the temperature of the bath being 150‹F. An example of a paste cleaning composition is one containing 20 parts by weight of Bentonite clay, 30 of water, 2 of octyl alcohol sulphate and 10 of sulphamic acid.
GB1193639A 1939-04-20 1939-04-20 Improvements in or relating to the cleaning and pickling of metals and to compositions for use therein Expired GB532661A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1193639A GB532661A (en) 1939-04-20 1939-04-20 Improvements in or relating to the cleaning and pickling of metals and to compositions for use therein

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1193639A GB532661A (en) 1939-04-20 1939-04-20 Improvements in or relating to the cleaning and pickling of metals and to compositions for use therein

Publications (1)

Publication Number Publication Date
GB532661A true GB532661A (en) 1941-01-29

Family

ID=9995357

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1193639A Expired GB532661A (en) 1939-04-20 1939-04-20 Improvements in or relating to the cleaning and pickling of metals and to compositions for use therein

Country Status (1)

Country Link
GB (1) GB532661A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3216857A (en) * 1962-05-21 1965-11-09 Wyandotte Chemicals Corp Process for removal of carbonaceous deposits
CN115110085A (en) * 2021-10-23 2022-09-27 赵晓峰 Novel method for improving stripping process in copper and alloy hydrogen peroxide chemical polishing system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3216857A (en) * 1962-05-21 1965-11-09 Wyandotte Chemicals Corp Process for removal of carbonaceous deposits
CN115110085A (en) * 2021-10-23 2022-09-27 赵晓峰 Novel method for improving stripping process in copper and alloy hydrogen peroxide chemical polishing system

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