GB510733A - Process for pickling siderurgical products - Google Patents

Process for pickling siderurgical products

Info

Publication number
GB510733A
GB510733A GB5301/38A GB530138A GB510733A GB 510733 A GB510733 A GB 510733A GB 5301/38 A GB5301/38 A GB 5301/38A GB 530138 A GB530138 A GB 530138A GB 510733 A GB510733 A GB 510733A
Authority
GB
United Kingdom
Prior art keywords
per litre
grams
iron
acid
grams per
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
GB5301/38A
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.)
JACQUES BRONFMA
JEAN LOUIS ALBERT LABERGERE
Original Assignee
JACQUES BRONFMA
JEAN LOUIS ALBERT LABERGERE
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 JACQUES BRONFMA, JEAN LOUIS ALBERT LABERGERE filed Critical JACQUES BRONFMA
Publication of GB510733A publication Critical patent/GB510733A/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
    • C23G1/081—Iron or steel solutions containing H2SO4
    • 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
    • C23G1/36—Regeneration of waste pickling liquors

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

510,733. Pickling iron and steel and alloys thereof. LABERGERE, J. L. A., and BRONFMA, J. Feb, 19, 1938, No. 5301. Convention date, Oct. 15, 1937. Drawings to Specification. [Class 82 (ii)] Iron, steel and alloys thereof are pickled in a bath containing 50-160, preferably 100-140, grams of sulphuric acid and 40-150 grams of iron, in the form of ferrous sulphate, per litre, at 50-65‹C., and are then washed in a bath containing 100-140 grams of sulphuric acid and 0-75 grams of iron, in the form of ferrous sulphate, per litre. A pickling bath containing 140 grams of acid and 50 grams of iron per litre is used at 55-60‹C. until the acid content falls to 100 grams per litre and the iron content has increased to 73 grams per litre : acid is then added to restore the initial concentration. This process is repeated twice bringing the iron content to 96 and 119 grams per litre respectively : the acid content is then raised to 120 grams per litre and pickling carried out to an acid content of 65 grams per litre and an iron content of 150 grams per litre. The pickling bath is then cooled to 20‹C. and the crystallized ferrous sulphate decanted off, giving an acid content of 89 grams per litre and an iron content of 75 grams per litre : the bath is diluted to give an acid content of 60 grams per litre and an iron content of 54 grams per litre and acid then added to restore the initial acid and iron contents. The washing may be so conducted as finally to obtain a bath suitable for pickling. Sulphonated coal tar compounds, such as those having a basis of sulphonated anthracene oil, may be employed as inhibitors.
GB5301/38A 1937-10-15 1938-02-19 Process for pickling siderurgical products Expired GB510733A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR837085T 1937-10-15

Publications (1)

Publication Number Publication Date
GB510733A true GB510733A (en) 1939-08-08

Family

ID=9298422

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5301/38A Expired GB510733A (en) 1937-10-15 1938-02-19 Process for pickling siderurgical products

Country Status (2)

Country Link
FR (1) FR837085A (en)
GB (1) GB510733A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2643205A (en) * 1949-12-27 1953-06-23 Pure Oil Co Removal of carbonaceous deposits from process equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2643205A (en) * 1949-12-27 1953-06-23 Pure Oil Co Removal of carbonaceous deposits from process equipment

Also Published As

Publication number Publication date
FR837085A (en) 1939-02-02

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