GB264788A - Improvements in or relating to the treatment of iron and steel articles - Google Patents

Improvements in or relating to the treatment of iron and steel articles

Info

Publication number
GB264788A
GB264788A GB20776/26A GB2077626A GB264788A GB 264788 A GB264788 A GB 264788A GB 20776/26 A GB20776/26 A GB 20776/26A GB 2077626 A GB2077626 A GB 2077626A GB 264788 A GB264788 A GB 264788A
Authority
GB
United Kingdom
Prior art keywords
treatment
iron
articles
electrolysis
sulphuric acid
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
GB20776/26A
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.)
METALS PROT CORP
Original Assignee
METALS PROT CORP
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 METALS PROT CORP filed Critical METALS PROT CORP
Publication of GB264788A publication Critical patent/GB264788A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/38—Chromatising
    • 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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/24—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Electrochemistry (AREA)
  • Laminated Bodies (AREA)
  • Chemical Treatment Of Metals (AREA)

Abstract

264,788. Metals Protection Corporation, (Assignees of Humphries, C. H.). Jan. 25, 1926, [Convention date]. Coating.-Iron and steel articles are rendered resistant to corrosion by treatment with a solution containing chromic acid with or without sulphuric acid. The action is stated to be due to the formation on the surface of an adherent, insoluble mixture of iron and chromium oxides and chromates. The process may be hastened by electrolysis. The electrolyte may contain 2 lbs. of chromic acid and ¢ oz. of sulphuric acid per gallon, the articles being connected as anodes for about 5 minutes with a current density of 10 amps. per sq. ft. A solution for treatment without electrolysis contains 2 lbs. of chromic acid and 2-15 oz. of sulphuric acid per gallon and is preferably heated to 100-150‹ F. The articles after treatment are dried, rinsed and again dried in a warm oven. The same solution may be used with electrolysis, the time required being then shorter. The coatings may be heated to 212‹ F. ; they are then adapted to receive coatings of paint or enamel.
GB20776/26A 1926-01-25 1926-08-23 Improvements in or relating to the treatment of iron and steel articles Expired GB264788A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US264788XA 1926-01-25 1926-01-25

Publications (1)

Publication Number Publication Date
GB264788A true GB264788A (en) 1927-05-26

Family

ID=21832061

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20776/26A Expired GB264788A (en) 1926-01-25 1926-08-23 Improvements in or relating to the treatment of iron and steel articles

Country Status (3)

Country Link
DE (1) DE485622C (en)
FR (1) FR620643A (en)
GB (1) GB264788A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3350285A (en) * 1963-07-20 1967-10-31 Ngk Insulators Ltd Method of forming rust-proofing and corrosion-resisting coating on metal surfaces
US3383293A (en) * 1967-03-03 1968-05-14 Plastic Clad Metal Products In Processes for drawing and coating metal substrates
GB2137659A (en) * 1983-04-08 1984-10-10 Usui Kokusai Sangyo Kk Joining cast iron member to another member of cast iron or other metal

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH291524A (en) * 1949-07-12 1953-06-30 Fantini Lorenzo Process for making objects of ferrous material, particularly steel, resistant to the formation of rust.
DE19804846A1 (en) * 1998-01-30 1999-08-05 Ethicon Gmbh Method of making blackened surgical needles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3350285A (en) * 1963-07-20 1967-10-31 Ngk Insulators Ltd Method of forming rust-proofing and corrosion-resisting coating on metal surfaces
US3383293A (en) * 1967-03-03 1968-05-14 Plastic Clad Metal Products In Processes for drawing and coating metal substrates
GB2137659A (en) * 1983-04-08 1984-10-10 Usui Kokusai Sangyo Kk Joining cast iron member to another member of cast iron or other metal
FR2543861A1 (en) * 1983-04-08 1984-10-12 Usui Kokusai Sangyo Kk PROCESS FOR TREATING A CAST IRON BEFORE FASTENING TO ANOTHER PIECE

Also Published As

Publication number Publication date
DE485622C (en) 1929-11-02
FR620643A (en) 1927-04-26

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