GB350420A - Improvements in or relating to the proofing of iron and steel against rust - Google Patents

Improvements in or relating to the proofing of iron and steel against rust

Info

Publication number
GB350420A
GB350420A GB37882/29A GB3788229A GB350420A GB 350420 A GB350420 A GB 350420A GB 37882/29 A GB37882/29 A GB 37882/29A GB 3788229 A GB3788229 A GB 3788229A GB 350420 A GB350420 A GB 350420A
Authority
GB
United Kingdom
Prior art keywords
mixture
diluted
chromium
solution
iron
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
GB37882/29A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB37882/29A priority Critical patent/GB350420A/en
Priority to US431048A priority patent/US1826866A/en
Publication of GB350420A publication Critical patent/GB350420A/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
    • 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
    • C23C22/33—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 containing also phosphates

Landscapes

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

Abstract

In the process claimed in the parent Specification the stock solution of phosphates is prepared by dissolving each of the metals iron, aluminium, zinc and chromium in phosphoric acid (45 DEG Be) diluted to 12 DEG Be and then mixing the solutions. Chromium oxide may be used instead of chromium and an accelerator which consists of a solution of potassium bichromate, neutral potassium chromate and monobasic ammonium phosphate with or without naphthalene may be added to the mixture of phosphate solutions. The mixture is diluted to 3 DEG Be before use or it may be evaporated to dryness at a temperature below 90 DEG C. and the compound redissolved to form a 3 DEG Be solution. The articles to be rust-proofed are immersed in the nearly boiling diluted mixture for from 1 to 1 1/2 hours.
GB37882/29A 1929-12-10 1929-12-10 Improvements in or relating to the proofing of iron and steel against rust Expired GB350420A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB37882/29A GB350420A (en) 1929-12-10 1929-12-10 Improvements in or relating to the proofing of iron and steel against rust
US431048A US1826866A (en) 1929-12-10 1930-02-24 Proofing of metal against corrosion and particularly of iron and steel against rust

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB37882/29A GB350420A (en) 1929-12-10 1929-12-10 Improvements in or relating to the proofing of iron and steel against rust

Publications (1)

Publication Number Publication Date
GB350420A true GB350420A (en) 1931-06-10

Family

ID=10399672

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37882/29A Expired GB350420A (en) 1929-12-10 1929-12-10 Improvements in or relating to the proofing of iron and steel against rust

Country Status (2)

Country Link
US (1) US1826866A (en)
GB (1) GB350420A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2418608A (en) * 1939-05-22 1947-04-08 Parker Rust Proof Co Corrosion-resistant metallic article and method of making the same
US2564864A (en) * 1948-07-02 1951-08-21 Parker Rust Proof Co Method of and solution for increasing resistance to corrosion
US3219489A (en) * 1962-05-24 1965-11-23 Conversion Chem Corp Composition and method for blackening the surfaces of cadmium and zinc

Also Published As

Publication number Publication date
US1826866A (en) 1931-10-13

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