GB919493A - Method of pickling iron-containing surfaces - Google Patents

Method of pickling iron-containing surfaces

Info

Publication number
GB919493A
GB919493A GB889259A GB889259A GB919493A GB 919493 A GB919493 A GB 919493A GB 889259 A GB889259 A GB 889259A GB 889259 A GB889259 A GB 889259A GB 919493 A GB919493 A GB 919493A
Authority
GB
United Kingdom
Prior art keywords
acid
acids
salt
component
solution
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
GB889259A
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.)
Siemens Schuckertwerke AG
Siemens AG
Original Assignee
Siemens Schuckertwerke AG
Siemens 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
Priority claimed from DES53033A external-priority patent/DE1107046B/en
Priority claimed from DES53981A external-priority patent/DE1133960B/en
Priority claimed from DES57325A external-priority patent/DE1130666B/en
Application filed by Siemens Schuckertwerke AG, Siemens AG filed Critical Siemens Schuckertwerke AG
Publication of GB919493A publication Critical patent/GB919493A/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
    • C23G1/08—Iron or steel

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

Ferrous metals are pickled at a temperature of at least 100 DEG C with a solution having a pH of 3-4 and comprising (A) hydrochloric acid or sulphuric acid or a mixture of either of said acids with hydrofluoric acid or a salt thereof, (B) hydrazine, hydroxylamine, ammonia or an organic amine, or a salt thereof, and (C) a compound capable of forming, by reaction with the sludge removed from the metal, a soluble iron complex which is stable at the treatment temperature. Specified compounds suitable as component (C) are citric acid, tartaric acid, salts of these acids, grape sugar and cane sugar. Applications referred to are removal of rust from the interior surfaces of tube systems and boiler installations. If desired, the pickling solution may be formed in situ, e.g. by treating first with component (B), and then adding components (C) and (A).
GB889259A 1957-04-06 1959-03-13 Method of pickling iron-containing surfaces Expired GB919493A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DES53033A DE1107046B (en) 1957-04-06 1957-04-06 Process for removing rust from objects and systems made of iron and / or steel, in particular for cleaning boiler systems and arrangement for carrying out the process
DES53981A DE1133960B (en) 1957-06-22 1957-06-22 Modification of the process for derusting objects and systems made of iron and / or steel, in particular pipe systems and boiler systems, into a process for simultaneous derusting and silica removal
DES57325A DE1130666B (en) 1958-03-13 1958-03-13 Process for removing rust from objects and systems made of iron and / or steel, in particular pipe systems and boiler systems

Publications (1)

Publication Number Publication Date
GB919493A true GB919493A (en) 1963-02-27

Family

ID=27212608

Family Applications (1)

Application Number Title Priority Date Filing Date
GB889259A Expired GB919493A (en) 1957-04-06 1959-03-13 Method of pickling iron-containing surfaces

Country Status (2)

Country Link
CH (1) CH416260A (en)
GB (1) GB919493A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006072780A1 (en) * 2005-01-05 2006-07-13 Houghton Australia Pty Limited Cleaning formulation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006072780A1 (en) * 2005-01-05 2006-07-13 Houghton Australia Pty Limited Cleaning formulation

Also Published As

Publication number Publication date
CH416260A (en) 1966-06-30

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