GB530972A - Improvements in and relating to corrosion-resisting layers on articles of aluminium and aluminium alloys - Google Patents

Improvements in and relating to corrosion-resisting layers on articles of aluminium and aluminium alloys

Info

Publication number
GB530972A
GB530972A GB14862/39A GB1486239A GB530972A GB 530972 A GB530972 A GB 530972A GB 14862/39 A GB14862/39 A GB 14862/39A GB 1486239 A GB1486239 A GB 1486239A GB 530972 A GB530972 A GB 530972A
Authority
GB
United Kingdom
Prior art keywords
solution
concentration
layers
salt
aluminium
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
GB14862/39A
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
Publication of GB530972A publication Critical patent/GB530972A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/18—After-treatment, e.g. pore-sealing
    • C25D11/24—Chemical after-treatment
    • C25D11/246—Chemical after-treatment for sealing layers
    • 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

Abstract

530,972. Treating metallic surfaces to produce a modified surface. SCHENK, M., May, 18, 1939, No. 14862. Convention date, May 20, 1938. [Glass 82 (ii)] [Also in Group XXXVI] Corrosion-resisting layers are produced on articles of Al or A1 alloys by forming, chemically or electrolytically, layers consisting at least in part of oxide or hydroxide of Al, and treating said layers with a hot aqueous solution of a neutrally reacting inorganic alkali salt the concentration of which corresponds to at least the saturation concentration at 20‹ C. while its solution in water at this concentration has a pH value between 6.5 and 8.2. The solution may comprise 12 parts by weight of potassium sulphate at 90‹C. Sulphates, thiosulphates, chlorates, perchlorates, phosphates, bromates and selenates may be used. A capillarily active substance, such as propyl or amyl alcohol fatty acids, or their compounds, aromatic sulphonic acids, sulphonated alcohols or sulphonated fatty acids, may be added to reduce the surface tension of the solution. The Specification as open to inspection under Sect. 91 states also that when capillarily active substances are employed, the concentration of the salt solution may be diminished, or reduced to zero ; thus a 2 per cent. solution of the substances known as Invadine B or Jgepon T in distilled water may be used without any addition of salt. This subject-matter does not appear in the Specification as accepted.
GB14862/39A 1938-05-20 1939-05-18 Improvements in and relating to corrosion-resisting layers on articles of aluminium and aluminium alloys Expired GB530972A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH530972X 1938-05-20

Publications (1)

Publication Number Publication Date
GB530972A true GB530972A (en) 1940-12-27

Family

ID=4518438

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14862/39A Expired GB530972A (en) 1938-05-20 1939-05-18 Improvements in and relating to corrosion-resisting layers on articles of aluminium and aluminium alloys

Country Status (2)

Country Link
FR (1) FR854932A (en)
GB (1) GB530972A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3073760A (en) * 1959-05-05 1963-01-15 Kaiser Aluminium Chem Corp Sealing of anodized coatings
US3652429A (en) * 1967-09-08 1972-03-28 Frye Ind Inc Sealing of colored anodized aluminum

Also Published As

Publication number Publication date
FR854932A (en) 1940-04-27

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