GB1109293A - Anodized finish on aluminum alloys - Google Patents

Anodized finish on aluminum alloys

Info

Publication number
GB1109293A
GB1109293A GB21684/65A GB2168465A GB1109293A GB 1109293 A GB1109293 A GB 1109293A GB 21684/65 A GB21684/65 A GB 21684/65A GB 2168465 A GB2168465 A GB 2168465A GB 1109293 A GB1109293 A GB 1109293A
Authority
GB
United Kingdom
Prior art keywords
alloy
hno3
anodizing
effected
particles
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
GB21684/65A
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.)
Reynolds Metals Co
Original Assignee
Reynolds Metals Co
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 Reynolds Metals Co filed Critical Reynolds Metals Co
Publication of GB1109293A publication Critical patent/GB1109293A/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
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/10—Etching compositions
    • C23F1/14—Aqueous compositions
    • C23F1/32—Alkaline compositions
    • C23F1/36—Alkaline compositions for etching aluminium or alloys thereof
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
    • 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
    • C25D11/14—Producing integrally coloured layers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • ing And Chemical Polishing (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Metal Rolling (AREA)
  • Cell Electrode Carriers And Collectors (AREA)

Abstract

A sparkling appearance is produced on an Albase alloy containing 5 to 9% Si by homogenizing the alloy by heating for 50 to 70 hours at a temperature below the eutectic temperature of the alloy, ca. 1000 DEG C., hot rolling the alloy to form a plate, preferentially removing Al from the alloy surface layer to expose protruding particles of Si, and anodizing the treated alloy to produce an anodic coating containing a random distribution of embedded Si particles. The Al removal may be effected with NaOH solution preceded by a HF-HNO3 or if desired a H3PO4-HNO3 pre-etc and may be followed by a HF-HNO3 desmutting dip. Anodizing is effected at 70 DEG F. in sulphuric acid with a C.D. of 10 to 20 A.S.F. with an initial voltage of 17.5 and a terminal voltage of 22. The treated alloy may also contain 0.4 to 0.7% Cr or a small amount of Fe.
GB21684/65A 1964-06-03 1965-05-21 Anodized finish on aluminum alloys Expired GB1109293A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US372200A US3400057A (en) 1964-06-03 1964-06-03 Alloy and finishing system

Publications (1)

Publication Number Publication Date
GB1109293A true GB1109293A (en) 1968-04-10

Family

ID=23467120

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21684/65A Expired GB1109293A (en) 1964-06-03 1965-05-21 Anodized finish on aluminum alloys

Country Status (2)

Country Link
US (1) US3400057A (en)
GB (1) GB1109293A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2040876A5 (en) * 1969-04-16 1971-01-22 Cegedur
US3772166A (en) * 1972-07-21 1973-11-13 Perma Technological Ind Inc Electrolytic process for slating a curvilinear aluminum workpiece
US4002541A (en) * 1972-11-03 1977-01-11 Design Systems, Inc. Solar energy absorbing article and method of making same
JPS50148236A (en) * 1974-05-21 1975-11-27
US4086715A (en) * 1976-04-21 1978-05-02 Blonigen Quentin P Multiple rating device
FR2721041B1 (en) * 1994-06-13 1997-10-10 Pechiney Recherche Aluminum-silicon alloy sheet intended for mechanical, aeronautical and space construction.
JP3818102B2 (en) * 2001-08-31 2006-09-06 住友電気工業株式会社 Heat dissipation substrate, method for manufacturing the same, and semiconductor device
WO2012076467A2 (en) * 2010-12-06 2012-06-14 Bang & Olufsen A/S A method to obtain a radiation scattering surface finish on an object

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE407433A (en) * 1934-02-10
US2202682A (en) * 1939-03-25 1940-05-28 Pittsburgh Plate Glass Co Writing surface
US2262696A (en) * 1939-10-21 1941-11-11 Aluminum Co Of America Method of treating aluminum alloys
US2851626A (en) * 1952-10-28 1958-09-09 Gen Electric Co Ltd Cathode ray tubes
US3020219A (en) * 1959-01-12 1962-02-06 Electralab Printed Electronics Process for producing oxide coatings on high silicon aluminum alloy
US3041259A (en) * 1959-07-31 1962-06-26 Hanson Van Winkle Munning Co Cleaning aluminum surfaces
US3153278A (en) * 1959-08-28 1964-10-20 Kaiser Aluminium Chem Corp Method of forming a composite aluminum article
US3164494A (en) * 1960-10-19 1965-01-05 Reynolds Metals Co Bright finished aluminum alloy system
US3180806A (en) * 1961-07-03 1965-04-27 Aluminum Co Of America Surface treatment of aluminum base alloys and resulting product
DE1208504B (en) * 1961-08-10 1966-01-05 Metall Werke Merkur G M B H Process for the production of high-gloss aluminum sheets or strips
US3328274A (en) * 1966-11-25 1967-06-27 Kaiser Aluminium Chem Corp Method of anodizing aluminum

Also Published As

Publication number Publication date
US3400057A (en) 1968-09-03

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