EP0320952A3 - Process for the electrolytic colouring of anodically obtained oxide layers on aluminium or aluminium alloys - Google Patents

Process for the electrolytic colouring of anodically obtained oxide layers on aluminium or aluminium alloys Download PDF

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Publication number
EP0320952A3
EP0320952A3 EP88121038A EP88121038A EP0320952A3 EP 0320952 A3 EP0320952 A3 EP 0320952A3 EP 88121038 A EP88121038 A EP 88121038A EP 88121038 A EP88121038 A EP 88121038A EP 0320952 A3 EP0320952 A3 EP 0320952A3
Authority
EP
European Patent Office
Prior art keywords
aluminium
stage
oxide layers
alternating current
anodically
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.)
Granted
Application number
EP88121038A
Other languages
German (de)
Other versions
EP0320952B1 (en
EP0320952A2 (en
Inventor
Gartner & Co. Josef
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
Priority to AT88121038T priority Critical patent/ATE89338T1/en
Publication of EP0320952A2 publication Critical patent/EP0320952A2/en
Publication of EP0320952A3 publication Critical patent/EP0320952A3/en
Application granted granted Critical
Publication of EP0320952B1 publication Critical patent/EP0320952B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

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  • 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)
  • Drawing Aids And Blackboards (AREA)
  • Electrochemical Coating By Surface Reaction (AREA)
  • Other Surface Treatments For Metallic Materials (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.
EP88121038A 1987-12-18 1988-12-15 Process for the electrolytic colouring of anodically obtained oxide layers on aluminium or aluminium alloys Expired - Lifetime EP0320952B1 (en)

Priority Applications (1)

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

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3743113 1987-12-18
DE19873743113 DE3743113A1 (en) 1987-12-18 1987-12-18 METHOD FOR ELECTROLYTICALLY CARBONIZING ANODICALLY PRODUCED OXIDIVE LAYERS ON ALUMINUM AND ALUMINUM ALLOYS

Publications (3)

Publication Number Publication Date
EP0320952A2 EP0320952A2 (en) 1989-06-21
EP0320952A3 true EP0320952A3 (en) 1990-01-31
EP0320952B1 EP0320952B1 (en) 1993-05-12

Family

ID=6343004

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88121038A Expired - Lifetime EP0320952B1 (en) 1987-12-18 1988-12-15 Process for the electrolytic colouring of anodically obtained oxide layers on aluminium or aluminium 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.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2053972A (en) * 1979-07-04 1981-02-11 Empresa Nacional Aluminio Electrolytic colouring of anodized aluminium
EP0239944A1 (en) * 1986-04-01 1987-10-07 Fujisash Company Method for electrolytic coloring of aluminum or aluminum alloys
EP0279146A1 (en) * 1987-01-16 1988-08-24 Alusuisse-Lonza Services Ag Process for electrolytically colouring an anodic oxide layer on aluminium or aluminium alloys

Family Cites Families (8)

* 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
ES498578A0 (en) * 1981-01-16 1981-12-01 Ronain Sa ELECTROLYTIC COLORING PROCEDURE OF AN ALUMINUM PART OR ALUMINUM ALLOY

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2053972A (en) * 1979-07-04 1981-02-11 Empresa Nacional Aluminio Electrolytic colouring of anodized aluminium
EP0239944A1 (en) * 1986-04-01 1987-10-07 Fujisash Company Method for electrolytic coloring of aluminum or aluminum alloys
EP0279146A1 (en) * 1987-01-16 1988-08-24 Alusuisse-Lonza Services Ag Process for electrolytically colouring an anodic oxide layer on aluminium or aluminium alloys

Also Published As

Publication number Publication date
DE3743113A1 (en) 1989-06-29
EP0320952B1 (en) 1993-05-12
ATE89338T1 (en) 1993-05-15
DE3743113C2 (en) 1992-05-07
DE3880990D1 (en) 1993-06-17
EP0320952A2 (en) 1989-06-21

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