GB614671A - Improvements in or relating to the formation of oxide coatings on aluminium surfaces - Google Patents

Improvements in or relating to the formation of oxide coatings on aluminium surfaces

Info

Publication number
GB614671A
GB614671A GB21635/46A GB2163546A GB614671A GB 614671 A GB614671 A GB 614671A GB 21635/46 A GB21635/46 A GB 21635/46A GB 2163546 A GB2163546 A GB 2163546A GB 614671 A GB614671 A GB 614671A
Authority
GB
United Kingdom
Prior art keywords
polyvinyl alcohol
per cent
oxide coatings
relating
formation
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
GB21635/46A
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.)
Howmet Aerospace Inc
Original Assignee
Aluminum Company of America
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 Aluminum Company of America filed Critical Aluminum Company of America
Publication of GB614671A publication Critical patent/GB614671A/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
    • C23C22/60—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 alkaline aqueous solutions with pH greater than 8
    • C23C22/66—Treatment of aluminium or alloys based thereon
    • C23C22/67—Treatment of aluminium or alloys based thereon with solutions containing hexavalent chromium
    • 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
    • C23C22/60—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 alkaline aqueous solutions with pH greater than 8
    • C23C22/66—Treatment of aluminium or alloys based thereon

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)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Laminated Bodies (AREA)

Abstract

Oxide coatings are formed on the surface of aluminium and aluminium alloys by treating them with an aqueous solution containing 0.5-6.0 per cent by weight of alkali metal carbonate and 0.2-5.0 of polyvinyl alcohol. When the solution contains only 0.2-3.0 of polyvinyl alcohol it may also contain 0.05-0.5 per cent of alkali metal chromate. Preferably the carbonate content is at least equal to the polyvinyl alcohol content. The oxide coating may be treated with hot sulphonated castor oil followed by a 15-minute treatment in 5 per cent sodium chromate solution.
GB21635/46A 1945-02-15 1946-07-19 Improvements in or relating to the formation of oxide coatings on aluminium surfaces Expired GB614671A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US578134A US2464596A (en) 1945-02-15 1945-02-15 Chemical method of coating aluminum

Publications (1)

Publication Number Publication Date
GB614671A true GB614671A (en) 1948-12-20

Family

ID=24311580

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21635/46A Expired GB614671A (en) 1945-02-15 1946-07-19 Improvements in or relating to the formation of oxide coatings on aluminium surfaces

Country Status (7)

Country Link
US (1) US2464596A (en)
BE (1) BE474285A (en)
CH (1) CH264921A (en)
DE (1) DE810097C (en)
ES (1) ES179130A1 (en)
FR (1) FR948260A (en)
GB (1) GB614671A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2504434A (en) * 1947-01-28 1950-04-18 Aluminum Co Of America Forming oxide coatings on aluminum
US2573320A (en) * 1949-03-18 1951-10-30 Pyrene Mfg Co Fire extinguisher
DE961587C (en) * 1951-06-28 1957-04-11 Basf Ag Process for the production of a dense oxide coating on objects made of aluminum or aluminum alloys
US3073760A (en) * 1959-05-05 1963-01-15 Kaiser Aluminium Chem Corp Sealing of anodized coatings
BE637664A (en) * 1960-10-10 1900-01-01
US4512818A (en) * 1983-05-23 1985-04-23 Shipley Company Inc. Solution for formation of black oxide

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1946150A (en) * 1931-05-15 1934-02-06 Aluminum Co Of America Coating of aluminum
DE655700C (en) * 1935-01-08 1938-01-21 Max Schenk Dr Process for the production of opaque, enamel-like protective layers on aluminum and its alloys
US2129071A (en) * 1935-10-31 1938-09-06 Addressograph Multigraph Planographic printing plate
US2171545A (en) * 1936-06-12 1939-09-05 Aluminum Co Of America Protective coating for aluminum and its alloys
US2137988A (en) * 1936-10-21 1938-11-22 Heresite & Chemical Company Adherent aluminum compound
US2279252A (en) * 1937-12-23 1942-04-07 Aluminum Co Of America Treating aluminum surfaces

Also Published As

Publication number Publication date
FR948260A (en) 1949-07-27
CH264921A (en) 1949-11-15
BE474285A (en) 1900-01-01
DE810097C (en) 1951-09-03
US2464596A (en) 1949-03-15
ES179130A1 (en) 1947-10-01

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