GB1197501A - Anodisation of Aluminium and its Alloys - Google Patents

Anodisation of Aluminium and its Alloys

Info

Publication number
GB1197501A
GB1197501A GB32350/67A GB3235067A GB1197501A GB 1197501 A GB1197501 A GB 1197501A GB 32350/67 A GB32350/67 A GB 32350/67A GB 3235067 A GB3235067 A GB 3235067A GB 1197501 A GB1197501 A GB 1197501A
Authority
GB
United Kingdom
Prior art keywords
acid
aluminium
alloys
naphthol
anodizing
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
GB32350/67A
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.)
Pechiney SA
Original Assignee
Pechiney SA
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 Pechiney SA filed Critical Pechiney SA
Publication of GB1197501A publication Critical patent/GB1197501A/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
    • C25D11/14—Producing integrally coloured layers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Electroplating And Plating Baths Therefor (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Electrochemical Coating By Surface Reaction (AREA)

Abstract

1,197,501. Colour anodizing of aluminium and its alloys. PECHINEY COMPAGNIE DE PRODUITS CHIMIQUES ET ELECTROMETALLURGIQUES. July 13, 1967 [July 13, 1966], No.32350/67. Heading C7B. Coloured oxide layers are formed on aluminium or aluminium base alloys by anodization in an aqueous solution comprising sulphuric acid; 2- naphthol-6:8-disulphonic acid, 2-naphthol-3:6- disulphonic acid, 1:8-dihydroxynaphthalene-3:6- disulphonic acid, or 1-naphthol-8-amino-3:6- disulphonic acid or an alkali metal salt of such an acid; and an acryclic aliphatic saturated mono- or di-carboxylic acid or ethylenically unsaturated dicarboxylic acid, none of which contains more than 5 C atoms. Preferred aliphatic acids are acetic, propionic, oxalic succinic, maleic, citraconic, and itaconic acids. For commercial, e.g. 99À5% Al and alloys containing small amounts of Mg and Si the colour obtained is generally bronze, different shades being obtained by varying the current density, bath temperature and duration of anodization. With alloys containing Mg and Mn with or without Si black coatings are obtained, while a brown coating is obtained with an Al-3% Mg alloy. Prior to anodizing, the aluminium or alloy is degreased, optionally polished, pickled in aqueous caustic soda, and rinsed successively in water, dilute nitric acid and water. After anodizing, sealing is effected in boiling nickel acetate solution.
GB32350/67A 1966-07-13 1967-07-13 Anodisation of Aluminium and its Alloys Expired GB1197501A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR69304A FR1493055A (en) 1966-07-13 1966-07-13 Direct formation of colored layers by anodization of aluminum and its alloys

Publications (1)

Publication Number Publication Date
GB1197501A true GB1197501A (en) 1970-07-08

Family

ID=8613177

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32350/67A Expired GB1197501A (en) 1966-07-13 1967-07-13 Anodisation of Aluminium and its Alloys

Country Status (13)

Country Link
US (1) US3658665A (en)
AT (1) AT268808B (en)
BE (1) BE701290A (en)
CH (1) CH464641A (en)
DE (1) DE1621144B1 (en)
ES (1) ES342899A1 (en)
FR (1) FR1493055A (en)
GB (1) GB1197501A (en)
GR (1) GR33981B (en)
LU (1) LU54074A1 (en)
NL (1) NL6709585A (en)
OA (1) OA02469A (en)
SE (1) SE329310B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3945895A (en) * 1974-12-05 1976-03-23 Fujisash Industries, Ltd. Method of producing colored anodic coating on aluminum and its alloys
US4565623A (en) * 1984-08-20 1986-01-21 Exxon Research And Engineering Co. Method for deasphalting heavy oils using a miscible solvent at a low treat ratio and a carbon dioxide antisolvent

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US25566A (en) * 1859-09-27 Apparatus for washing- gas
NL48557C (en) * 1935-12-11
NL121366C (en) * 1962-06-16

Also Published As

Publication number Publication date
US3658665A (en) 1972-04-25
NL6709585A (en) 1968-01-15
DE1621144B1 (en) 1971-04-15
SE329310B (en) 1970-10-05
BE701290A (en) 1968-01-12
OA02469A (en) 1970-05-05
FR1493055A (en) 1967-08-25
GR33981B (en) 1968-02-29
ES342899A1 (en) 1968-12-01
LU54074A1 (en) 1968-03-12
AT268808B (en) 1969-02-25
CH464641A (en) 1968-10-31

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees