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GB439404A - Process for the production of anti-corrosive oxide films on aluminium and its alloys - Google Patents

Process for the production of anti-corrosive oxide films on aluminium and its alloys

Info

Publication number
GB439404A
GB439404A GB12330/35A GB1233035A GB439404A GB 439404 A GB439404 A GB 439404A GB 12330/35 A GB12330/35 A GB 12330/35A GB 1233035 A GB1233035 A GB 1233035A GB 439404 A GB439404 A GB 439404A
Authority
GB
United Kingdom
Prior art keywords
alloys
aluminium
oxide films
production
superatmospheric pressure
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
GB12330/35A
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.)
Peintal S A
Original Assignee
Peintal S A
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 Peintal S A filed Critical Peintal S A
Publication of GB439404A publication Critical patent/GB439404A/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

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

Oxide films are formed on aluminium and its alloys by treating the metal in alkaline baths containing chromates under superatmospheric pressure and at a temperature above 100 DEG C. The superatmospheric pressure is obtained by controlling the release of the hydrogen from the container in which the reaction is carried out. Sodium chromate may be added to a bath containing an alkali such as sodium carbonate, potassium carbonate, ammonia, milk of lime, or barium hydroxide. The bath may be heated to a temperature of, for example, 115-120 DEG C. The treatment of tubes and of parts having narrow grooves or passages is referred to.
GB12330/35A 1934-04-25 1935-04-24 Process for the production of anti-corrosive oxide films on aluminium and its alloys Expired GB439404A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH439404X 1934-04-25

Publications (1)

Publication Number Publication Date
GB439404A true GB439404A (en) 1935-12-05

Family

ID=4515151

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12330/35A Expired GB439404A (en) 1934-04-25 1935-04-24 Process for the production of anti-corrosive oxide films on aluminium and its alloys

Country Status (1)

Country Link
GB (1) GB439404A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2156706A (en) * 1984-04-03 1985-10-16 Imp Clevite Inc Method of bonding a high temperature resistant polymeric material to an aluminum base substrate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2156706A (en) * 1984-04-03 1985-10-16 Imp Clevite Inc Method of bonding a high temperature resistant polymeric material to an aluminum base substrate

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