EP2177647B1 - Verfahren zum Bilden einer mehrfarbigen Aluminiumlegierung - Google Patents

Verfahren zum Bilden einer mehrfarbigen Aluminiumlegierung Download PDF

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Publication number
EP2177647B1
EP2177647B1 EP09168633A EP09168633A EP2177647B1 EP 2177647 B1 EP2177647 B1 EP 2177647B1 EP 09168633 A EP09168633 A EP 09168633A EP 09168633 A EP09168633 A EP 09168633A EP 2177647 B1 EP2177647 B1 EP 2177647B1
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EP
European Patent Office
Prior art keywords
substrate
colored
oxide layer
external surface
forming
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Application number
EP09168633A
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English (en)
French (fr)
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EP2177647A1 (de
Inventor
Chia-Wei Hsu
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    • 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
    • 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
    • C25D11/022—Anodisation on selected surface areas
    • 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
    • C25D11/12—Anodising more than once, e.g. in different baths
    • 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

Definitions

  • the present invention relates to a method of forming a multicolor aluminum alloy, and more particularly to a method of forming a multicolor aluminum alloy by anodizing for preferred color quality.
  • a conventional anodizing surface treatment comprises forming a base oxide layer on a metal substrate by chemical or electrochemical treatment to provide a protective effect to the metal substrate.
  • the metal may be aluminum alloy.
  • the conventional anodizing surface treatment may further comprise steps of forming a base ink layer on the base oxide layer, forming a subsequent oxide layer and forming a subsequent ink layer on the subsequent oxide layer, wherein the steps after reforming the surface of the base layers may be repeated and the subsequent layer is included as the base in such repeated treatments to provide a multicolor effect.
  • the step of reforming the surface of the base layer requires a cutting or a milling process to expose the substrate such as cutting or milling, which uses coolant and oil that must be fully removed, or the coolant and oil prevent the surface oxide layer being formed on the substrate.
  • cutting or milling may damage the original ink layer.
  • the step of forming the surface oxide layer may cause the original oxide layer to flake, thereby allowing the metal substrate to be oxidized.
  • the surface ink layer may bleed into the base ink layer.
  • the base ink layer must also be fully removed before a surface oxide layer can be formed on the substrate so increasing a manufacturing time of the multicolor substrate.
  • the present invention provides a method of forming multicolor on aluminum alloy to mitigate or obviate the aforementioned problems.
  • the main objective of the present invention is to provide a method of forming multicolor aluminum alloy, and more particularly to a method of forming multicolor aluminum alloy using anodizing surface treatment for preferred color quality.
  • a method for forming multicolor aluminum alloy comprising steps of preparing, surface treating, forming, processing and reprocessing.
  • Preparing comprises providing an aluminum alloy substrate and cleaning with water.
  • Surface treating comprises disposing the substrate in a base electrolytic solution to form a base oxide layer by anodizing.
  • Forming comprises forming a membrane of transparent, acid-proof, insulated plastic material on the substrate.
  • Processing comprises removing local area membrane and corresponding oxide layer from the substrate and cleaning.
  • Reprocessing comprises disposing the clean substrate in a subsequent electrolytic solution to form a subsequent oxide layer on areas of the substrate exposed by the membrane by anodizing.
  • Fig. 1 is a block diagram of a method of forming multicolor aluminum alloy in accordance with the present invention.
  • a method of forming multicolor aluminum alloy in accordance with the present invention comprises steps of preparing, surface treating, forming, processing and reprocessing.
  • the step of preparing comprises acts of providing an aluminum alloy substrate having an external surface, machining the substrate to form a shaped substrate by a Computer Numerical Control (CNC) machine with coolant and oil, removing the coolant and oil from the external surface with sodium hydroxide and cleaning the shaped substrate with water, thereby removing impurities from the external surface of the substrate to provide a clean external surface.
  • CNC Computer Numerical Control
  • the step of surface treatment comprises disposing the substrate with clean external surface in a base electrolytic solution to form a colored oxide layer on the substrate by an anodizing surface treatment, removing the substrate from the base electrolytic solution after forming the base oxide layer on the external surface of the substrate and drying to form a colored substrate.
  • the step of forming comprises forming a membrane on the colored oxide layer made from a transparent acid-proof insulated plastic material, such as plastic, rubber or ceramic layer.
  • the step of processing comprises processing the substrate to remove at least one local area of membrane and corresponding local area of colored oxide layer from the external surface of the colored substrate with coolant and oil using the CNC machine, removing the coolant and oil from the colored substrate using sodium hydroxide and cleaning the external surface of the substrate with water, thereby removing impurities from and providing and clean colored substrate.
  • the step of reprocessing comprises disposing the substrate in a subsequent electrolytic solution to form a subsequent oxide layer on the external surface of the substrate exposed by the membrane, and removing the substrate from the subsequent electrolytic solution after forming the subsequent oxide layer on the external surface of the substrate and drying to add a color to the colored oxide layer.
  • the coolant and oil in subsequent steps do not adhere to the colored oxide layer so is cleaned easily.
  • the local membrane on the local colored oxide is removed, the local colored oxide is fully replaced by the oxide layer so bleeding does not occur and damage to the oxide layer is replaced with the colored layer. Therefore, a preferred color quality is achieved.

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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)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Laminated Bodies (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Forging (AREA)

Claims (10)

  1. Verfahren zum Herstellen einer mehrfarbigen Aluminiumlegierung mit den Schritten:
    Vorbereiten, umfassend
    Bereitstellen eines Aluminiumlegierungssubstrats mit einer Außenoberfläche; Maschinelle Bearbeitung des Substrats unter Verwendung von Kühlmittel und Öl, um ein geformtes Substrat auszubilden;
    Entfernen des Kühlmittels und des Öls von der Außenoberfläche des Substrats; und Reinigen des geformten Substrats mit Wasser;
    Oberflächenbehandlung mit Anordnen des geformten Substrats mit einer sauberen Außenoberfläche in einer elektrolytischen Basislösung, um eine Basisoxidschicht auf der Außenoberfläche des Substrats durch anodisierende Oberflächenbehandlung auszubilden, um ein farbiges Substrat bereitzustellen;
    Formen mit Ausbildung einer Membran auf dem farbigen Substrat, die aus einem transparenten, säurebeständigem und isolierendem Kunststoff hergestellt ist;
    Bearbeitung mit
    Bearbeiten des gefärbten Substrats, um zumindest einen lokalen Bereich der Membran und den entsprechenden lokalen Bereich der gefärbten Oxidschicht von der Außenoberfläche des gefärbten Substrats zu entfernen;
    Entfernen der Kühlflüssigkeit und des Öls vom gefärbten Substrat; und
    Reinigen der Außenoberfläche des gefärbten Substrats mit Wasser, um ein sauberes gefärbtes Substrat auszubilden; und
    Wiederaufarbeitung mit Anordnen des sauberen gefärbten Substrats in einer nachfolgenden elektrolytischen Lösung, um eine nachfolgende Oxidschicht auf der Außenoberfläche des Substrats, die durch die Membran freigelegt wurde, auszubilden.
  2. Verfahren nach Anspruch 1, wobei der Schritt der Oberflächenbehandlung ferner das Entfernen des Substrats aus der elektrolytischen Basislösung nach dem Ausbilden der Oxidschicht auf der Außenoberfläche des Substrats und dem Trocknen umfasst.
  3. Verfahren nach Anspruch 2, wobei der Wiederaufarbeitungsschritt ferner das Entfernen des Substrats aus der nachfolgenden elektrolytischen Lösung nach dem Ausbilden der nachfolgenden Oxidschicht auf der Außenoberfläche des Substrats und dem Trocknen umfasst.
  4. Verfahren nach Anspruch 3, wobei der Schritt der maschinellen Bearbeitung des Substrats mit einer computergestützten numerisch gesteuerten (CNC) Maschine durchgeführt wird.
  5. Verfahren nach Anspruch 4, wobei der Schritt des Bearbeitens des Substrats, um zumindest einen lokalen Bereich der Membran und den entsprechenden lokalen Bereich der gefärbten Oxidschicht der Außenoberfläche des gefärbten Substrats zu entfernen mit der CNC Maschine durchgeführt wird.
  6. Verfahren nach Anspruch 5, wobei bei den Schritten des Entfernens der Kühlflüssigkeit und des Öls Natronlauge verwendet wird.
  7. Verfahren nach Anspruch 1, wobei die Schritte der Oberflächenbehandlung und der Wiederaufarbeitung ferner das Entfernen des Substrats aus der elektrolytischen Lösung nach dem Ausbilden der Oxidschicht und dem Trocknen umfassen.
  8. Verfahren nach Anspruch 1, wobei der Schritt der maschinellen Bearbeitung des Substrats, um das geformte Substrat auszubilden, mit einer CNC Maschine durchgeführt wird.
  9. Verfahren nach Anspruch 1, wobei der Schritt des Bearbeitens des Substrats, um zumindest einen lokalen Bereich der Membran und den entsprechenden lokalen Bereich der gefärbten Oxidschicht der Außenoberfläche des gefärbten Substrats zu entfernen, mit einer CNC Maschine durchgeführt wird.
  10. Verfahren nach Anspruch 1, wobei bei den Schritten des Entfernens der Kühlflüssigkeit und des Öls von der Außenoberfläche des Substrats Natronlauge verwendet wird.
EP09168633A 2008-10-20 2009-08-25 Verfahren zum Bilden einer mehrfarbigen Aluminiumlegierung Active EP2177647B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW097140159A TW201016891A (en) 2008-10-20 2008-10-20 Anode multi-color surface treatment method for aluminum alloy

Publications (2)

Publication Number Publication Date
EP2177647A1 EP2177647A1 (de) 2010-04-21
EP2177647B1 true EP2177647B1 (de) 2011-03-23

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ID=41633927

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EP (1) EP2177647B1 (de)
AT (1) ATE503042T1 (de)
DE (1) DE602009000954D1 (de)
TW (1) TW201016891A (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8968548B2 (en) 2012-05-12 2015-03-03 Catcher Technology Co., Ltd. Method of forming multicolor surface
CN103498177A (zh) * 2013-09-24 2014-01-08 昆山凯诺尔金属制品有限公司 一种轻金属制品多种阳极化表面的加工方法
CN103556185B (zh) * 2013-11-20 2016-05-04 沈阳工业大学 电解铝阳极棒清理装置
GB201702213D0 (en) * 2017-02-10 2017-03-29 Multitechnic Ltd Aluminium panels
EP3741882A1 (de) 2019-05-21 2020-11-25 Bang & Olufsen A/S Verfahren zur bereitstellung einer farbigen anodisierten aluminiumoberfläche

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5867893A (ja) * 1981-10-16 1983-04-22 Tateyama Alum Kogyo Kk アルミニウムまたはアルミニウム合金の模様着色法
JPS58110694A (ja) * 1981-12-23 1983-07-01 Katsushika Press Kogyosho:Kk アルミニウム表面の複色処理方法
JPS6067691A (ja) * 1983-09-21 1985-04-18 Seiko Epson Corp 多着色時計ケ−スの製造方法
JPS6075599A (ja) * 1983-09-30 1985-04-27 Nippon Denso Co Ltd 陽極酸化皮膜の多色模様形成法
RU2072000C1 (ru) * 1993-08-23 1997-01-20 Институт химии Дальневосточного отделения РАН Способ разноцветного окрашивания изделий из алюминия и его сплавов
US20050109623A1 (en) * 2003-09-10 2005-05-26 Bao Sheng Corporation Multi-color anodizing processes

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TWI338056B (de) 2011-03-01
ATE503042T1 (de) 2011-04-15
DE602009000954D1 (de) 2011-05-05
EP2177647A1 (de) 2010-04-21
TW201016891A (en) 2010-05-01

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