ATE89338T1 - PROCESS FOR ELECTROLYTIC COLORING OF ANODICALLY PRODUCED OXIDE COATINGS ON ALUMINUM AND ALUMINUM ALLOYS. - Google Patents

PROCESS FOR ELECTROLYTIC COLORING OF ANODICALLY PRODUCED OXIDE COATINGS ON ALUMINUM AND ALUMINUM ALLOYS.

Info

Publication number
ATE89338T1
ATE89338T1 AT88121038T AT88121038T ATE89338T1 AT E89338 T1 ATE89338 T1 AT E89338T1 AT 88121038 T AT88121038 T AT 88121038T AT 88121038 T AT88121038 T AT 88121038T AT E89338 T1 ATE89338 T1 AT E89338T1
Authority
AT
Austria
Prior art keywords
aluminum
stage
alternating current
oxide coatings
electrolytic coloring
Prior art date
Application number
AT88121038T
Other languages
German (de)
Original Assignee
Gartner & Co J
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 Gartner & Co J filed Critical Gartner & Co J
Application granted granted Critical
Publication of ATE89338T1 publication Critical patent/ATE89338T1/en

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
    • C25D11/20—Electrolytic after-treatment
    • C25D11/22—Electrolytic after-treatment for colouring layers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Electrochemical Coating By Surface Reaction (AREA)
  • Drawing Aids And Blackboards (AREA)

Abstract

The invention discloses a process for electrolytically colouring anodic oxide layers on aluminium or its alloys by means of alternating current in electrolytes containing metal salt. The process comprises two stages, direct current being applied in the first stage and alternating current in the second stage and a notable feature is that, instead of direct current, a modified alternating current which contains a marked cathodic component is applied in the first stage and an off-time of 10 to 60 seconds is inserted between direct current and alternating current treatment, a longer time and/or higher voltage being employed in the second stage than in the first stage.
AT88121038T 1987-12-18 1988-12-15 PROCESS FOR ELECTROLYTIC COLORING OF ANODICALLY PRODUCED OXIDE COATINGS ON ALUMINUM AND ALUMINUM ALLOYS. ATE89338T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873743113 DE3743113A1 (en) 1987-12-18 1987-12-18 METHOD FOR ELECTROLYTICALLY CARBONIZING ANODICALLY PRODUCED OXIDIVE LAYERS ON ALUMINUM AND ALUMINUM ALLOYS
EP88121038A EP0320952B1 (en) 1987-12-18 1988-12-15 Process for the electrolytic colouring of anodically obtained oxide layers on aluminium or aluminium alloys

Publications (1)

Publication Number Publication Date
ATE89338T1 true ATE89338T1 (en) 1993-05-15

Family

ID=6343004

Family Applications (1)

Application Number Title Priority Date Filing Date
AT88121038T ATE89338T1 (en) 1987-12-18 1988-12-15 PROCESS FOR ELECTROLYTIC COLORING OF ANODICALLY PRODUCED OXIDE COATINGS ON ALUMINUM AND ALUMINUM ALLOYS.

Country Status (3)

Country Link
EP (1) EP0320952B1 (en)
AT (1) ATE89338T1 (en)
DE (2) DE3743113A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0487754A1 (en) * 1990-11-25 1992-06-03 BEFELD SYSTEME GmbH Process for the electrolytic colouring of anodically obtained oxide layers on aluminium or aluminium alloys
ES2052455B1 (en) * 1992-12-31 1994-12-01 Novamax Tech Holdings PROCEDURE FOR ELECTROLYTICALLY OBTAINING ON ANODIZED ALUMINUM OF A COLOR RANGE OF VISIBLE SPECTRUM.

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1902983C3 (en) * 1968-06-21 1978-06-22 Keller, Eberhard, 7121 Freudental Process for the electrolytic coloring of anodic oxide layers on aluminum or aluminum alloys
FR2052100A5 (en) * 1969-07-16 1971-04-09 Cegedur Gp
JPS5014623B1 (en) * 1971-02-22 1975-05-29
JPS547267B2 (en) * 1973-09-21 1979-04-05
JPS5423664B2 (en) * 1975-03-06 1979-08-15
ES437604A1 (en) * 1975-05-12 1977-01-16 Empresa Nacional Aluminio System for autocontrolling and regulating the average value of the voltage applied to processes for the electrolytic coloring of anodized aluminum
ES474736A1 (en) * 1978-10-31 1979-04-01 Empresa Nacional Aluminio System for generating and autocontrolling the voltage or current wave form applicable to processes for the electrolytic coloring of anodized aluminium
ES482210A0 (en) * 1979-07-04 1982-08-01 PROCESS FOR THE ELECTROLYTIC COLORATION OF A-NODIZED ALUMINUM.
ES8201232A1 (en) * 1981-01-16 1981-12-01 Ronain Sa Process for electrolytically colouring a piece of aluminium or aluminium alloy.
US4808280A (en) * 1986-04-01 1989-02-28 Fujisash Company Method for electrolytic coloring of aluminim or aluminum alloys
DE3777806D1 (en) * 1987-01-16 1992-04-30 Alusuisse Lonza Services Ag METHOD FOR ELECTROLYTICALLY COLORING AN ANODIC OXIDE LAYER ON ALUMINUM OR ALUMINUM ALLOYS.

Also Published As

Publication number Publication date
EP0320952A3 (en) 1990-01-31
EP0320952B1 (en) 1993-05-12
DE3743113A1 (en) 1989-06-29
DE3880990D1 (en) 1993-06-17
EP0320952A2 (en) 1989-06-21
DE3743113C2 (en) 1992-05-07

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Legal Events

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REN Ceased due to non-payment of the annual fee