GB370380A - Improvements in or relating to the pickling of metals, and the like processes - Google Patents

Improvements in or relating to the pickling of metals, and the like processes

Info

Publication number
GB370380A
GB370380A GB29738/30A GB2973830A GB370380A GB 370380 A GB370380 A GB 370380A GB 29738/30 A GB29738/30 A GB 29738/30A GB 2973830 A GB2973830 A GB 2973830A GB 370380 A GB370380 A GB 370380A
Authority
GB
United Kingdom
Prior art keywords
solution
thiazolone
acid
rhodanin
pseudo
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
GB29738/30A
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Publication of GB370380A publication Critical patent/GB370380A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • 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
    • C23G1/04—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
    • C23G1/06—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors
    • C23G1/065—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors sulfur-containing compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Detergent Compositions (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

Inhibitors for use with sulphuric acid in pickling or cleaning metals consist of derivatives of 4-thiazolone particularly those containing divalent substituents, e.g. oxygen, sulphur, or an imino group, in the 2 position, or those containing hydrogen or a monovalent hydrocarbon radical in the 3 position, or those substituted in both of the above ways. Examples given are rhodanin, pseudo-thio-hydantoin (2-imino-4-thiazolone), diphenyl-pseudo-thio-hydantoin (2-phenylimino-3-phenyl-4-thiazolone) and 2-4-diketothiazolidine. These derivatives, which are only slightly soluble in dilute acids, are added either in finely powdered form, or in solution in concentrated sulphuric or other acid, or in the form of soluble salts, e.g. a solution of rhodanin in ammonia or caustic alkali may be used. Foam producing agents, e.g. sulphite cellulose waste or molasses residues may be mixed with the inhibitor or with the solution of the inhibitor in acid or alkali.ALSO:Inhibitors for use with sulphuric, hydrochloric, or acetic acid, sodium bisulphate solution &c. in pickling or cleaning metals consist of derivatives of 4-thiazolone, particularly those containing divalent substituents, e.g. oxygen, sulphur or an imino group, in the 2 position, or those containing hydrogen or a monovalent hydrocarbon radical in the 3 position, or those substituted in both of the above ways. Examples given are rhodanin, pseudo-thiohydantoin (2-imino-4-thiazolone), diphenyl-pseudo-thio-hydantoin (2-phenylimino-3-phenyl-4-thiazolone) and 2-4-diketothiazolidine. These derivatives, which are only slightly soluble in dilute acids, are added either in finely powdered form, or in solution in concentrated sulphuric or other acid, or in the form of soluble salts, e.g. a solution of rhodanin in ammonia or caustic alkali may be used. Foam-producing agents e.g. sulphite cellulose waste or molasses residues may be mixed with the inhibitor or with the solution of the inhibitor in acid or alkali.
GB29738/30A 1929-10-04 1930-10-04 Improvements in or relating to the pickling of metals, and the like processes Expired GB370380A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US370380XA 1929-10-04 1929-10-04

Publications (1)

Publication Number Publication Date
GB370380A true GB370380A (en) 1932-04-07

Family

ID=21892107

Family Applications (2)

Application Number Title Priority Date Filing Date
GB20147/28A Expired GB320380A (en) 1929-10-04 1928-07-11 Improvements in and relating to automatic or semi-automatic telephone systems
GB29738/30A Expired GB370380A (en) 1929-10-04 1930-10-04 Improvements in or relating to the pickling of metals, and the like processes

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB20147/28A Expired GB320380A (en) 1929-10-04 1928-07-11 Improvements in and relating to automatic or semi-automatic telephone systems

Country Status (2)

Country Link
FR (1) FR677069A (en)
GB (2) GB320380A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2257395A (en) * 1991-06-20 1993-01-13 Mtu Muenchen Gmbh Etching solution for removing metallic hot gas corrosion protective layers and hot gas reaction coatings from engine blades
CN103194760A (en) * 2013-04-02 2013-07-10 北京化工大学 Foam type cleaning agent for processing iron sulfides

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2257395A (en) * 1991-06-20 1993-01-13 Mtu Muenchen Gmbh Etching solution for removing metallic hot gas corrosion protective layers and hot gas reaction coatings from engine blades
GB2257395B (en) * 1991-06-20 1995-11-01 Mtu Muenchen Gmbh Etching solution and method of removing metallic hot gas corrosion protective layers and hot gas reaction coatings from engine blades
CN103194760A (en) * 2013-04-02 2013-07-10 北京化工大学 Foam type cleaning agent for processing iron sulfides
CN103194760B (en) * 2013-04-02 2015-07-08 北京化工大学 Foam type cleaning agent for processing iron sulfides

Also Published As

Publication number Publication date
GB320380A (en) 1929-10-11
FR677069A (en)

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