GB985300A - Process for coating aluminium articles - Google Patents

Process for coating aluminium articles

Info

Publication number
GB985300A
GB985300A GB1259763A GB1259763A GB985300A GB 985300 A GB985300 A GB 985300A GB 1259763 A GB1259763 A GB 1259763A GB 1259763 A GB1259763 A GB 1259763A GB 985300 A GB985300 A GB 985300A
Authority
GB
United Kingdom
Prior art keywords
articles
mono
treatment
specified
amines
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
GB1259763A
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.)
Alcan Holdings Switzerland AG
Original Assignee
Alusuisse Holdings AG
Schweizerische Aluminium AG
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
Priority claimed from CH386662A external-priority patent/CH400718A/en
Priority claimed from CH1218562A external-priority patent/CH417274A/en
Application filed by Alusuisse Holdings AG, Schweizerische Aluminium AG filed Critical Alusuisse Holdings AG
Publication of GB985300A publication Critical patent/GB985300A/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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F3/00—Brightening metals by chemical means
    • C23F3/02—Light metals
    • C23F3/03—Light metals with acidic solutions
    • 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
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F3/00—Electrolytic etching or polishing
    • C25F3/16—Polishing
    • C25F3/18—Polishing of light metals
    • C25F3/20—Polishing of light metals of aluminium

Abstract

A process for farming a protective coating of boehmite (AlOOH) on clean Al or Al alloy articles comprises treating the articles with aqueous solutions of an organic amine or amide having a pH of between 7.5 and 9.7. The solution may be at 75-100 DEG C. and may be applied by dipping or spraying. It may additionally contain an oxidizing substance, e.g. H2O2. Prior to treatment, the articles may be chemically or electrochemically polished and, after treatment, they may be heated at 100-300 DEG C. Preferred amines or amides are triethanolamine, (e.g. 0.002-0.3% w/w), mono- or di-ethanolamine, formamide or acetamide. Other specified amines are mono-, di- and trimethylamine, ethylene diamine, diethylamine and hexamethylene tetramine. Specified Al articles which may be treated are kitchen and camping equipment, wire, wire netting, rivets and screws. Swiss Specification 295,082 is referred to.
GB1259763A 1962-03-30 1963-03-29 Process for coating aluminium articles Expired GB985300A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH386762 1962-03-30
CH386662A CH400718A (en) 1962-03-30 1962-03-30 Process for producing a boehmite layer on aluminum objects
CH1218562A CH417274A (en) 1962-03-30 1962-10-17 Process for producing a boehmite layer on aluminum objects

Publications (1)

Publication Number Publication Date
GB985300A true GB985300A (en) 1965-03-03

Family

ID=27174577

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1259763A Expired GB985300A (en) 1962-03-30 1963-03-29 Process for coating aluminium articles

Country Status (1)

Country Link
GB (1) GB985300A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3473971A (en) * 1965-08-02 1969-10-21 Alusuisse Process of producing inorganic layers on metallic articles
FR2930023A1 (en) * 2008-04-09 2009-10-16 Valeo Systemes Thermiques Surface treatment method for motor vehicle's charge air cooler, involves carrying out hydrothermal treatment on components and brazing points to cover components and points with boehmite film and protect components and points from corrosion
WO2023049722A1 (en) * 2021-09-24 2023-03-30 Novelis Inc. Surface treatment of metal substrates simultaneous with solution heat treatment or continuous annealing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3473971A (en) * 1965-08-02 1969-10-21 Alusuisse Process of producing inorganic layers on metallic articles
FR2930023A1 (en) * 2008-04-09 2009-10-16 Valeo Systemes Thermiques Surface treatment method for motor vehicle's charge air cooler, involves carrying out hydrothermal treatment on components and brazing points to cover components and points with boehmite film and protect components and points from corrosion
WO2023049722A1 (en) * 2021-09-24 2023-03-30 Novelis Inc. Surface treatment of metal substrates simultaneous with solution heat treatment or continuous annealing

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