GB735819A - Improvements in or relating to the coating of aluminium surfaces and to compositionstherefor - Google Patents

Improvements in or relating to the coating of aluminium surfaces and to compositionstherefor

Info

Publication number
GB735819A
GB735819A GB735819DA GB735819A GB 735819 A GB735819 A GB 735819A GB 735819D A GB735819D A GB 735819DA GB 735819 A GB735819 A GB 735819A
Authority
GB
United Kingdom
Prior art keywords
sodium
acid
ammonium
coating
potassium
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
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.)
Henkel Corp
Original Assignee
Amchem Products Inc
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 Amchem Products Inc filed Critical Amchem Products Inc
Publication of GB735819A publication Critical patent/GB735819A/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
    • C23C22/34—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 fluorides or complex fluorides
    • C23C22/37—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 fluorides or complex fluorides containing also hexavalent chromium compounds

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)
  • Chemically Coating (AREA)

Abstract

The surface of aluminium or an aluminium alloy is treated with a solution of hexavalent chromium and a fluorine compound in proportions sufficient to produce a coating on such surface, the solution also containing a soluble complex cyanide. The latter may be a ferrocyanide, ferricyanide, cobalticyanide, manganicyanide, chromic cyanide or cobaltocyanide, e.g. sodium, ammonium or potassium ferricyamide. Fluorine compounds referred to include sodium and ammonium fluosilicates, ammonium fluoride and bifluoride, hydrofluoric aid, hydrofluosilicic acid, sodium borofluoride and fluoboric acid; chromium compounds include chromic anhydride, potassium and sodium bichromates; and additional ingredients include boric acid, sodium aluminate and, to adjust pH, sulphuric acid and sodium bisulphate. U.S.A. Specifications 2,276,353 and 2,507,956 are referred to.
GB735819D 1953-03-10 1953-07-20 Improvements in or relating to the coating of aluminium surfaces and to compositionstherefor Expired GB735819A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US320762XA 1953-03-10 1953-03-10

Publications (1)

Publication Number Publication Date
GB735819A true GB735819A (en) 1955-08-31

Family

ID=21862968

Family Applications (1)

Application Number Title Priority Date Filing Date
GB735819D Expired GB735819A (en) 1953-03-10 1953-07-20 Improvements in or relating to the coating of aluminium surfaces and to compositionstherefor

Country Status (6)

Country Link
BE (1) BE521331A (en)
CH (1) CH320762A (en)
DE (1) DE976375C (en)
FR (1) FR1085484A (en)
GB (1) GB735819A (en)
NL (2) NL184345B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2993847A (en) * 1958-04-04 1961-07-25 Burroughs Corp Aluminum treating process

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2796370A (en) * 1955-03-04 1957-06-18 Charles W Ostrander Composition and method for producing corrosion resistant protective coating on aluminum and aluminum alloys
US2796371A (en) * 1955-03-16 1957-06-18 Allied Res Products Inc Corrosion resistant protective coating on aluminum and aluminum alloys
BE566276A (en) * 1957-08-19 1958-04-15

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2276353A (en) * 1935-09-28 1942-03-17 Parker Rust Proof Co Process of coating
FR840367A (en) * 1937-12-31 1939-04-25 Method and methods of treating metal surfaces
US2507956A (en) * 1947-11-01 1950-05-16 Lithographic Technical Foundat Process of coating aluminum

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2993847A (en) * 1958-04-04 1961-07-25 Burroughs Corp Aluminum treating process

Also Published As

Publication number Publication date
FR1085484A (en) 1955-02-02
CH320762A (en) 1957-04-15
NL95353C (en)
BE521331A (en)
DE976375C (en) 1963-07-25
NL184345B (en)

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