EP1700934A2 - Procédé pour la preparation de couches d'oxydes et de silicates - Google Patents

Procédé pour la preparation de couches d'oxydes et de silicates Download PDF

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Publication number
EP1700934A2
EP1700934A2 EP05027776A EP05027776A EP1700934A2 EP 1700934 A2 EP1700934 A2 EP 1700934A2 EP 05027776 A EP05027776 A EP 05027776A EP 05027776 A EP05027776 A EP 05027776A EP 1700934 A2 EP1700934 A2 EP 1700934A2
Authority
EP
European Patent Office
Prior art keywords
metal surfaces
oxide
silicate
preparation
magnesium
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Withdrawn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
EP05027776A
Other languages
German (de)
English (en)
Other versions
EP1700934A3 (fr
Inventor
Reinhold Separautzki
Andreas Dr. Mucha
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP1700934A2 publication Critical patent/EP1700934A2/fr
Publication of EP1700934A3 publication Critical patent/EP1700934A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • C25D11/024—Anodisation under pulsed or modulated current or potential
    • 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
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D9/00—Electrolytic coating other than with metals

Definitions

  • the invention relates to a process for the preparation of oxide and silicate layers on metal surfaces in a liquid electrolyte, in particular for the metals aluminum, magnesium and their alloys, and for tantalum, titanium, niobium and zirconium.
  • the DE 41 04 847 C2 shows a method of ceramizing metal surfaces, in which metal parts are ceramified in a liquid electrolyte by spark discharge.
  • the parts are connected to the multiphase, periodic power source, so that the parts alternately take over the function of the anode and cathode.
  • a counter electrode not to be ceramized is thus not required.
  • this object is achieved in that in the preparation of the oxide and silicate layers in the liquid electrolyte, a bipolar current source is used whose polarity can be changed.
  • Oxyd and silicate layers with a thickness of more than 20 microns can be made faster and cheaper.
  • the action of the current in the second or millisecond range is made. In between is reversed in the millisecond range.
  • the density of the oxide and silicate layers can be significantly increased. It is also proposed to choose the pulse ratio greater than 1: 1, i. H. the time period during which the part to be coated is connected as a cathode, to choose greater than the period of time during which the part to be coated is connected as an anode.
  • a forged vehicle wheel, consisting of the magnesium alloy AZ80, is first cleaned in a bath of 10% acetic acid.
  • the vehicle wheel is immersed in an electrolyte I consisting of an aqueous solution of potassium hydroxide (KOH) and sodium fluoride (NaF) and connected to a power source.
  • the power source supplies a current between 30 to 100 A.
  • the vehicle wheel is switched as a cathode and activated for about 40 seconds.
  • the current is then pulsed for 30 minutes so that the motor vehicle wheel is connected as an anode for a period of 30 ms and as a cathode for a period of 130 ms.
  • the result is a layer of magnesium oxides and aluminum oxides in the thickness of 3 to 10 microns.
  • the further unipolar coating takes place in the electrolyte II, consisting of an aqueous solution of KOH, NaF and sodium metasilicate (Na 2 O 3 Si).
  • the immersed in the electrolyte II wheel is connected for 55 ms with +250 V as the anode and 500 ms at -250 V as the cathode.
  • the total treatment time is 20 minutes.
  • a layer of magnesium silicate layer thickness of 10 to 20 microns.
  • Both electrolytes are heated to 30 to 40 ° C or cooled.
  • magnesium silicate is impermeable to corrosive media.
  • the total layer is shown in the micrograph after the single figure: on a wheel 1 of magnesium, a 3.25 micron thick oxide layer 2, consisting of magnesium oxides, and a 11.61 micron thick silicate layer 3, consisting of magnesium silicate applied by the process described above ,

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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)
  • Chemical Treatment Of Metals (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
EP05027776A 2005-03-11 2005-12-19 Procédé pour la preparation de couches d'oxydes et de silicates Withdrawn EP1700934A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005011322A DE102005011322A1 (de) 2005-03-11 2005-03-11 Verfahren zur Herstellung von Oxyd- und Silikatschichten auf Metalloberflächen

Publications (2)

Publication Number Publication Date
EP1700934A2 true EP1700934A2 (fr) 2006-09-13
EP1700934A3 EP1700934A3 (fr) 2008-08-06

Family

ID=36481359

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05027776A Withdrawn EP1700934A3 (fr) 2005-03-11 2005-12-19 Procédé pour la preparation de couches d'oxydes et de silicates

Country Status (3)

Country Link
US (1) US20060201815A1 (fr)
EP (1) EP1700934A3 (fr)
DE (1) DE102005011322A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102304739A (zh) * 2011-09-19 2012-01-04 北京科技大学 高耐磨耐蚀自润滑陶瓷层微弧氧化制备方法及其电解液

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090278396A1 (en) * 2008-05-12 2009-11-12 Gm Global Technology Operations, Inc. Corrosion isolation of magnesium components
CN102367584B (zh) * 2011-09-19 2014-04-16 北京科技大学 金属微弧氧化电解液及金属微弧氧化表面黑色陶瓷化方法
DE102017217227A1 (de) * 2017-09-27 2019-03-28 Bayerische Motoren Werke Aktiengesellschaft Radscheiben - Radanlagenverbindung für ein Fahrzeugrad
US11898084B2 (en) 2018-09-04 2024-02-13 Saudi Arabian Oil Company Suspension supporting additive for water-based drilling and completions fluids
KR20210055068A (ko) 2018-09-04 2021-05-14 사우디 아라비안 오일 컴퍼니 합성 작용화된 첨가제, 합성 방법 및 사용 방법
US11414584B2 (en) * 2018-09-04 2022-08-16 Saudi Arabian Oil Company Viscosity supporting additive for water-based drilling and completions fluids

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD299074A5 (de) 1987-12-16 1992-03-26 Freiberger Ne-Metalle Gmbh,De Schmiermittel auf anorganischer basis zum pressen und ziehen
DE4104847C2 (fr) 1991-02-16 1993-04-08 Ahc-Oberflaechentechnik Friebe & Reininghaus Gmbh, 5014 Kerpen, De

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902976A (en) * 1974-10-01 1975-09-02 S O Litho Corp Corrosion and abrasion resistant aluminum and aluminum alloy plates particularly useful as support members for photolithographic plates and the like
US4517059A (en) * 1981-07-31 1985-05-14 The Boeing Company Automated alternating polarity direct current pulse electrolytic processing of metals
DE3808609A1 (de) * 1988-03-15 1989-09-28 Electro Chem Eng Gmbh Verfahren zur erzeugung von korrosions- und verschleissbestaendigen schutzschichten auf magnesium und magnesiumlegierungen
RU2023762C1 (ru) * 1991-06-27 1994-11-30 Научно-техническое бюро "Энергия" Московского межотраслевого объединения "Ингеоком" Способ нанесения покрытий на алюминиевые сплавы
IL109857A (en) * 1994-06-01 1998-06-15 Almag Al Electrolytic process and apparatus for coating metals
SK121099A3 (en) * 1997-03-11 2000-06-12 Almag Al Process and apparatus for coating metals
CA2315792A1 (fr) * 1997-12-17 1999-06-24 Isle Coat Limited Procede permettant d'obtenir des revetements de protection durs sur des articles faits d'alliages d'aluminium
FR2808291B1 (fr) * 2000-04-26 2003-05-23 Mofratech Procede electrolytique d'oxydation pour l'obtention d'un revetement ceramique a la surface d'un metal
US6916414B2 (en) * 2001-10-02 2005-07-12 Henkel Kommanditgesellschaft Auf Aktien Light metal anodization
US6495267B1 (en) * 2001-10-04 2002-12-17 Briggs & Stratton Corporation Anodized magnesium or magnesium alloy piston and method for manufacturing the same
US6919012B1 (en) * 2003-03-25 2005-07-19 Olimex Group, Inc. Method of making a composite article comprising a ceramic coating

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD299074A5 (de) 1987-12-16 1992-03-26 Freiberger Ne-Metalle Gmbh,De Schmiermittel auf anorganischer basis zum pressen und ziehen
DE4104847C2 (fr) 1991-02-16 1993-04-08 Ahc-Oberflaechentechnik Friebe & Reininghaus Gmbh, 5014 Kerpen, De

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102304739A (zh) * 2011-09-19 2012-01-04 北京科技大学 高耐磨耐蚀自润滑陶瓷层微弧氧化制备方法及其电解液
CN102304739B (zh) * 2011-09-19 2015-06-03 北京科技大学 高耐磨耐蚀自润滑陶瓷层微弧氧化制备方法及其电解液

Also Published As

Publication number Publication date
US20060201815A1 (en) 2006-09-14
EP1700934A3 (fr) 2008-08-06
DE102005011322A1 (de) 2006-09-14

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