EP0090268A2 - Procédé d'anodisation de produits en aluminium et pièces aluminées - Google Patents

Procédé d'anodisation de produits en aluminium et pièces aluminées Download PDF

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Publication number
EP0090268A2
EP0090268A2 EP83102616A EP83102616A EP0090268A2 EP 0090268 A2 EP0090268 A2 EP 0090268A2 EP 83102616 A EP83102616 A EP 83102616A EP 83102616 A EP83102616 A EP 83102616A EP 0090268 A2 EP0090268 A2 EP 0090268A2
Authority
EP
European Patent Office
Prior art keywords
aluminum
anodizing
bath
parts
per liter
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
EP83102616A
Other languages
German (de)
English (en)
Other versions
EP0090268A3 (en
EP0090268B1 (fr
Inventor
Siegfried Dr. Birkle
Klaus Stöger
Hans De Vries
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to AT83102616T priority Critical patent/ATE28760T1/de
Publication of EP0090268A2 publication Critical patent/EP0090268A2/fr
Publication of EP0090268A3 publication Critical patent/EP0090268A3/de
Application granted granted Critical
Publication of EP0090268B1 publication Critical patent/EP0090268B1/fr
Expired legal-status Critical Current

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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
    • C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
    • C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
    • 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

Definitions

  • the invention relates to a method for anodizing aluminum materials and aluminized parts in aqueous alkaline, phosphate-containing, anodizing electrolytes.
  • Aluminum materials and aluminum-coated parts are not yet sufficiently stable for many applications, although self-passivation takes place in air, which is stable in the pH range from 5 to 9. However, this oxide layer is still too small for many technical applications. The layer is therefore reinforced in anodizing electrolytes.
  • an alkaline bath with sodium phosphate as the main constituent is used to produce shiny aluminum oxide layers with a maximum thickness of 4 ⁇ m.
  • a bath temperature of 20 to 90 ° C and a current density of 0.5 to 80 A / dm 2 aluminum or aluminum alloys are bright-galvanized.
  • these treatments (“glossy processes”) lead to glossy films, which are often undesirable.
  • the object of the invention is to provide aluminum materials and parts coated with aluminum, in particular iron materials, with hard abrasion-resistant and dyeable thicker aluminum oxide layers, in particular those of 10 to 20 ⁇ m, while avoiding the disadvantages mentioned above, even if the aluminum coating has any defects.
  • the flaws are e.g. the uncoated contact points in question, or in the case of profiled parts, the uncoated points, which may be present due to the limited spreadability of the aluminizing process.
  • Thick aluminum oxide layers are also to be produced on partially aluminized consumer metals, such as iron, nonferrous metal, nickel and zinc die-cast materials, without destroying the base material during anodization.
  • This object is achieved by the process of the invention in that on the aluminum material and aluminized parts in an anodizing bath which does not form any forming layers and contains 10 to 200 g of trisodium phosphate or tripotassium phosphate per liter at temperatures of 0 to 15 ° C. while passing C0 2 -free or low-CO 2 air, a preferably 10 to 20 ⁇ m thick matt anodizing layer is produced.
  • aluminum materials and aluminized parts in particular also partially aluminized parts made of iron, nickel and non-ferrous metal materials as well as zinc die-cast metals, even if they have flaws, can be anodically oxidized without technical disadvantages, so that hard, abrasion-resistant and dyeable oxide layers are formed.
  • the surfaces of aluminized parts are not shiny, but retain the appearance of the deposited aluminum layers.
  • the oxide layers produced are above all thicker than 4 ⁇ m. They are characterized by exceptional hardness and abrasion resistance.
  • the method according to the invention is also particularly suitable for achieving the aforementioned layer properties in the case of aluminum materials.
  • the bath can be operated with direct current and with impulse current.
  • Baths containing 50 to 150 g / l of trisodium phosphate or tripotassium phosphate are advantageously used to carry out the process according to the invention.
  • optically most uniform anodizing layers are obtained by adding 1 to 20 g of a complexing agent per liter of anodizing bath, for example alkali metal cyanide. Preferably 1 to 6 g of sodium cyanide are added to the bath per liter.
  • the method according to the invention is suitable for anodizing aluminum materials, aluminum flame spraying layers and roll-cladding layers, fire-aluminum layers, PVD-aluminum layers and in particular IVD and galvano-aluminum layers.
  • Galvano aluminum is an aluminum of high purity (> 99.99), good electrical conductivity and high ductility ⁇ 20 HV, which is obtained by deposition from organoaluminum electrolytes.
  • hollow bodies that are aluminized on the outside as well as workpieces with partially exposed surfaces, e.g. Parts of the apparatus with movable hinges (glasses), in which, in principle, no aluminum can be deposited at all points on the hinge, are provided according to the invention with hard, abrasion-resistant and dyeable aluminum oxide layers in thicknesses of 10 to 20 ⁇ m.
  • FIG shows in section an embodiment of a hinge 1 of an eyeglass frame made of nickel silver 4, which has an aluminum layer 2.
  • the aluminum oxide layer applied to this according to the invention is designated by 3.
  • Iron sheets 50 x 100 x 1mm were first galvanically coated in an aluminum electrolyte with the following composition with a matt galvano-aluminum layer.
  • the spectacle frames 1 to 3 were treated in an anodizing bath - as described in Example 1.
  • eyeglass frames 4 to 6 were treated after pickling in an electrolyte of the following composition, the anodizing conditions being chosen from 1 to 3:
  • the eyeglass frames 1 to 3 on the hinges looked more inconsistent after coloring the anodized layer
  • the eyeglass frames 4 to 6 gave a uniform visual appearance.
  • the complexing agent contributes to a more homogeneous oxide formation at the phase boundary with aluminum.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Electrochemical Coating By Surface Reaction (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Table Devices Or Equipment (AREA)
  • Forging (AREA)
EP83102616A 1982-03-30 1983-03-16 Procédé d'anodisation de produits en aluminium et pièces aluminées Expired EP0090268B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83102616T ATE28760T1 (de) 1982-03-30 1983-03-16 Verfahren zum anodisieren von aluminiumwerkstoffen und aluminierten teilen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3211759 1982-03-30
DE19823211759 DE3211759A1 (de) 1982-03-30 1982-03-30 Verfahren zum anodisieren von aluminiumwerkstoffen und aluminierten teilen

Publications (3)

Publication Number Publication Date
EP0090268A2 true EP0090268A2 (fr) 1983-10-05
EP0090268A3 EP0090268A3 (en) 1985-05-15
EP0090268B1 EP0090268B1 (fr) 1987-08-05

Family

ID=6159748

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83102616A Expired EP0090268B1 (fr) 1982-03-30 1983-03-16 Procédé d'anodisation de produits en aluminium et pièces aluminées

Country Status (5)

Country Link
US (1) US4439287A (fr)
EP (1) EP0090268B1 (fr)
JP (1) JPS58177493A (fr)
AT (1) ATE28760T1 (fr)
DE (2) DE3211759A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3328049A1 (de) * 1983-08-03 1985-02-21 Hoechst Ag, 6230 Frankfurt Verfahren zur einstufigen anodischen oxidation von traegermaterialien aus aluminium fuer offsetdruckplatten
US4894126A (en) * 1988-01-15 1990-01-16 Mahmoud Issa S Anodic coatings on aluminum for circuit packaging
US4898651A (en) * 1988-01-15 1990-02-06 International Business Machines Corporation Anodic coatings on aluminum for circuit packaging
US5097109A (en) * 1990-02-20 1992-03-17 General Motors Corporation Insulated aluminum weld fixture and a method of making same
GB2395491B (en) * 2001-08-14 2006-03-01 Magnesium Technology Ltd Magnesium anodisation system and methods
US6591954B2 (en) 2001-09-28 2003-07-15 Eaton Corporation Clutch brake
US7820300B2 (en) * 2001-10-02 2010-10-26 Henkel Ag & Co. Kgaa Article of manufacture and process for anodically coating an aluminum substrate with ceramic oxides prior to organic or inorganic coating
US7452454B2 (en) * 2001-10-02 2008-11-18 Henkel Kgaa Anodized coating over aluminum and aluminum alloy coated substrates
US7578921B2 (en) 2001-10-02 2009-08-25 Henkel Kgaa Process for anodically coating aluminum and/or titanium with ceramic oxides
US6916414B2 (en) 2001-10-02 2005-07-12 Henkel Kommanditgesellschaft Auf Aktien Light metal anodization
US7569132B2 (en) * 2001-10-02 2009-08-04 Henkel Kgaa Process for anodically coating an aluminum substrate with ceramic oxides prior to polytetrafluoroethylene or silicone coating
JP5334445B2 (ja) * 2008-04-07 2013-11-06 本田技研工業株式会社 アルミニウム合金製部材及びその製造方法
US9701177B2 (en) 2009-04-02 2017-07-11 Henkel Ag & Co. Kgaa Ceramic coated automotive heat exchanger components
US8609254B2 (en) 2010-05-19 2013-12-17 Sanford Process Corporation Microcrystalline anodic coatings and related methods therefor
US8512872B2 (en) 2010-05-19 2013-08-20 Dupalectpa-CHN, LLC Sealed anodic coatings

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2187937A1 (fr) * 1972-06-03 1974-01-18 Fuji Photo Film Co Ltd
JPS5431741A (en) * 1977-08-16 1979-03-08 Fuji Xerox Co Ltd Paper conveying apparatus for copying in electronic copier
US4188270A (en) * 1978-09-08 1980-02-12 Akiyoshi Kataoka Process for electrolytically forming glossy film on articles of aluminum or alloy thereof
JPS56169794A (en) * 1980-05-31 1981-12-26 Anritsu Corp Production of name plate
JPS5757890A (en) * 1980-09-19 1982-04-07 Shiyoukoushiya:Kk Surface treatment of hoop of composite material consisting of aluminum or its alloy and different metal

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5451936A (en) * 1977-09-30 1979-04-24 Shokosha Kk Electropolishing of aluminum and alloy thereof
JPS5576093A (en) * 1978-11-30 1980-06-07 Shiyoukoushiya:Kk Bright electrolysis method of aluminum or its alloy
JPS568118A (en) * 1979-11-14 1981-01-27 Minolta Camera Co Ltd T.t.l. metering automatic aperture control type single- lens reflex camera

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2187937A1 (fr) * 1972-06-03 1974-01-18 Fuji Photo Film Co Ltd
JPS5431741A (en) * 1977-08-16 1979-03-08 Fuji Xerox Co Ltd Paper conveying apparatus for copying in electronic copier
US4188270A (en) * 1978-09-08 1980-02-12 Akiyoshi Kataoka Process for electrolytically forming glossy film on articles of aluminum or alloy thereof
JPS56169794A (en) * 1980-05-31 1981-12-26 Anritsu Corp Production of name plate
JPS5757890A (en) * 1980-09-19 1982-04-07 Shiyoukoushiya:Kk Surface treatment of hoop of composite material consisting of aluminum or its alloy and different metal

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, Band 92, Nr.6, 11-02-1980, Seite 491, Nr.49414b; COLUMBUS, OHIO (US); & JP-A-54 031 741 (SHOKOSHA K.K.) 09-10-1979 *
CHEMICAL ABSTRACTS, Band 96, Nr.16, April 1982, Seite 641, Nr.132165z; COLUMBUS, OHIO (US); & JP-A-56 169 794 (ANRITSU ELECTRIC CO. LTD.) 26-12-1981 *
CHEMICAL ABSTRACTS, Band 97, Nr.10, September 1982, Seite 628, Nr.81763d; COLUMBUS,OHIO (US); & JP-A-57 057 890 (SHOKOSHA K.K.) 07-04-1982 *

Also Published As

Publication number Publication date
DE3211759A1 (de) 1983-10-06
EP0090268A3 (en) 1985-05-15
DE3372871D1 (en) 1987-09-10
JPS58177493A (ja) 1983-10-18
JPH0359149B2 (fr) 1991-09-09
EP0090268B1 (fr) 1987-08-05
US4439287A (en) 1984-03-27
ATE28760T1 (de) 1987-08-15

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