GB1059207A - Methods of improving the corrosion-resistance of aluminum surfaces - Google Patents

Methods of improving the corrosion-resistance of aluminum surfaces

Info

Publication number
GB1059207A
GB1059207A GB44811/65A GB4481165A GB1059207A GB 1059207 A GB1059207 A GB 1059207A GB 44811/65 A GB44811/65 A GB 44811/65A GB 4481165 A GB4481165 A GB 4481165A GB 1059207 A GB1059207 A GB 1059207A
Authority
GB
United Kingdom
Prior art keywords
corrosion
ions
resistance
improving
methods
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
GB44811/65A
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 GB1059207A publication Critical patent/GB1059207A/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
    • C23C22/82—After-treatment
    • C23C22/83—Chemical after-treatment

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

The corrosion-resistance of an aluminium metal or alloy surface is improved by treating a chromate conversion coating upon the surface at a temperature of at least 65 DEG C. with an aqueous alkaline (pH 8 to 12) solution containing 15 to 100 g/1 of a soluble hexavalent chromium-containing compound (calculated as Na2Cr2O7) e.g. one or more Na, K, Li or ammonium salts of chromic acid. The chromate conversion coating may be formed on the surface by treating it with an acidic solution containing soluble hexavalent Cr ions (chromic acid) and an halogenated accelerating agent, e.g. KZr- and ammonium boro-fluorides, with or without ferro- or ferricyanide ions and/or salts of complex heteropolymolybdates and/or Ba, Sb, or Sn ions.
GB44811/65A 1964-10-22 1965-10-22 Methods of improving the corrosion-resistance of aluminum surfaces Expired GB1059207A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US405854A US3364080A (en) 1964-10-22 1964-10-22 Method of improving the corrosion resistance of chromate conversion coated aluminum surface

Publications (1)

Publication Number Publication Date
GB1059207A true GB1059207A (en) 1967-02-15

Family

ID=23605520

Family Applications (1)

Application Number Title Priority Date Filing Date
GB44811/65A Expired GB1059207A (en) 1964-10-22 1965-10-22 Methods of improving the corrosion-resistance of aluminum surfaces

Country Status (3)

Country Link
US (1) US3364080A (en)
DE (1) DE1521669B1 (en)
GB (1) GB1059207A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4504325A (en) * 1982-03-19 1985-03-12 The Boeing Company Method for sealing an aluminum oxide film
EP0487200B1 (en) * 1990-11-14 2000-06-21 Titeflex Corporation Fluoropolymer aluminium laminate

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2563431A (en) * 1951-08-07 Method of improving the resistance
US2120212A (en) * 1936-01-10 1938-06-07 Curtin Howe Corp Phosphated metal coating
US2288007A (en) * 1941-02-26 1942-06-30 Westinghouse Electric & Mfg Co Corrosion resistant film on zinc
US2544139A (en) * 1947-07-01 1951-03-06 Du Pont Process for enameling aluminumrich alloys
NL275534A (en) * 1961-03-15

Also Published As

Publication number Publication date
DE1521669B1 (en) 1969-12-04
US3364080A (en) 1968-01-16

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