EP0919645A3 - Aluminium casting piece with an aluminium oxide conversion coating and process for its manufacture - Google Patents

Aluminium casting piece with an aluminium oxide conversion coating and process for its manufacture Download PDF

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Publication number
EP0919645A3
EP0919645A3 EP98121771A EP98121771A EP0919645A3 EP 0919645 A3 EP0919645 A3 EP 0919645A3 EP 98121771 A EP98121771 A EP 98121771A EP 98121771 A EP98121771 A EP 98121771A EP 0919645 A3 EP0919645 A3 EP 0919645A3
Authority
EP
European Patent Office
Prior art keywords
die
aluminium
cast aluminum
manufacture
aluminum
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.)
Withdrawn
Application number
EP98121771A
Other languages
German (de)
French (fr)
Other versions
EP0919645A2 (en
Inventor
Peter Prof. Dr. Kurze
Dora Banerjee
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.)
Aalberts Surface Technologies GmbH Kerpen
Original Assignee
AHC Oberflaechenechnik GmbH
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 AHC Oberflaechenechnik GmbH filed Critical AHC Oberflaechenechnik GmbH
Publication of EP0919645A2 publication Critical patent/EP0919645A2/en
Publication of EP0919645A3 publication Critical patent/EP0919645A3/en
Withdrawn legal-status Critical Current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
    • 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
    • C25D11/16—Pretreatment, e.g. desmutting

Landscapes

  • 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)

Abstract

Um die Korrosionsschutz- und Verschleißschutz-Eigenschaften und die elektrische Isolation und Einfärbbarkeit von Aluminiumdruckgußteilen zu verbessern, wird das Aluminiumdruckgußwerkstück mit einer dichten reinen Aluminiumschicht von 5 bis 50 µm haftfest überzogen und anschließend so anodisiert, daß die reine Aluminiumschicht vollständig und der darunterliegende Druckguß partiell in eine Aluminiumoxid-Konversionsschicht umgewandelt werden. Das so erhaltene Aluminiumdruckgußteil hat eine aus zwei Phasen bestehende Aluminiumoxid-Konversionsschicht, deren äußere eine homogene feinkörnige Struktur und die innere in den Aluminiumdruckguß reinreichende Phase eine grobkörnige unregelmäßige Struktur besitzt.To the corrosion protection and wear protection properties and the electrical It will improve the insulation and colorability of die-cast aluminum Die-cast aluminum workpiece with a dense pure aluminum layer from 5 to 50 µm coated and then anodized so that the pure Complete aluminum layer and the underlying die casting partially in one Alumina conversion layer to be converted. The so obtained Die-cast aluminum has a two-phase alumina conversion layer, the exterior of which has a homogeneous fine-grained structure and the inner phase reaching into the die-cast aluminum a coarse-grained irregular Has structure.

EP98121771A 1997-11-19 1998-11-16 Aluminium casting piece with an aluminium oxide conversion coating and process for its manufacture Withdrawn EP0919645A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19751256 1997-11-19
DE1997151256 DE19751256C2 (en) 1997-11-19 1997-11-19 Die-cast aluminum part with an aluminum oxide conversion layer and process for its production

Publications (2)

Publication Number Publication Date
EP0919645A2 EP0919645A2 (en) 1999-06-02
EP0919645A3 true EP0919645A3 (en) 2004-01-07

Family

ID=7849206

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98121771A Withdrawn EP0919645A3 (en) 1997-11-19 1998-11-16 Aluminium casting piece with an aluminium oxide conversion coating and process for its manufacture

Country Status (2)

Country Link
EP (1) EP0919645A3 (en)
DE (1) DE19751256C2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19960646A1 (en) * 1999-12-16 2001-07-05 Fed Mogul Deutschland Gmbh Production of a thermally and mechanically loaded surface layer on cast pistons in I.C. engines comprises applying an aluminum layer to the surface of the component and anodizing
DE10134559B4 (en) * 2001-07-16 2008-10-30 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Process for coating components, processable dispersible coatings and use
EP2166200A1 (en) 2008-09-23 2010-03-24 Franz Rübig & Söhne GmbH & Co. KG Valve spring disc and method for its manufacture

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2338063A1 (en) * 1973-07-26 1975-04-03 Siemens Ag PROCESS FOR COATING HIGH-FREQUENCY HEATING COILS MADE OF COPPER, BRASS, SILVER OR ALUMINUM
DE2166843A1 (en) * 1971-05-07 1976-03-11 Siemens Ag Electroplating light metal alloys - with aluminium, in an organometallic electrolyte
FR2579999A1 (en) * 1985-04-03 1986-10-10 Preci Coat Sa Process for treating the surface of an article made of aluminium alloys and article made of aluminium alloys and obtained by this process

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2166843A1 (en) * 1971-05-07 1976-03-11 Siemens Ag Electroplating light metal alloys - with aluminium, in an organometallic electrolyte
DE2338063A1 (en) * 1973-07-26 1975-04-03 Siemens Ag PROCESS FOR COATING HIGH-FREQUENCY HEATING COILS MADE OF COPPER, BRASS, SILVER OR ALUMINUM
FR2579999A1 (en) * 1985-04-03 1986-10-10 Preci Coat Sa Process for treating the surface of an article made of aluminium alloys and article made of aluminium alloys and obtained by this process

Also Published As

Publication number Publication date
EP0919645A2 (en) 1999-06-02
DE19751256C2 (en) 2001-04-19
DE19751256A1 (en) 1999-05-27

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