EP1486588A2 - Procédé pour hydrater l'oxyde de métal posé sur des pièces en métal, aussi bien que les pièces hydratées - Google Patents

Procédé pour hydrater l'oxyde de métal posé sur des pièces en métal, aussi bien que les pièces hydratées Download PDF

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Publication number
EP1486588A2
EP1486588A2 EP03022760A EP03022760A EP1486588A2 EP 1486588 A2 EP1486588 A2 EP 1486588A2 EP 03022760 A EP03022760 A EP 03022760A EP 03022760 A EP03022760 A EP 03022760A EP 1486588 A2 EP1486588 A2 EP 1486588A2
Authority
EP
European Patent Office
Prior art keywords
oxide layer
metal
metal oxide
aluminum
partial
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
EP03022760A
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German (de)
English (en)
Other versions
EP1486588A3 (fr
EP1486588B1 (fr
Inventor
Wolfgang Schabel
Hans Binder
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.)
Sueddeutsche Aluminium Manufaktur GmbH
Original Assignee
Sueddeutsche Aluminium Manufaktur 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.)
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Publication date
Application filed by Sueddeutsche Aluminium Manufaktur GmbH filed Critical Sueddeutsche Aluminium Manufaktur GmbH
Priority to SI200332561T priority Critical patent/SI1486588T1/en
Publication of EP1486588A2 publication Critical patent/EP1486588A2/fr
Publication of EP1486588A3 publication Critical patent/EP1486588A3/fr
Application granted granted Critical
Publication of EP1486588B1 publication Critical patent/EP1486588B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C25D11/18—After-treatment, e.g. pore-sealing
    • 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
    • C25D11/24—Chemical after-treatment
    • C25D11/246—Chemical after-treatment for sealing layers

Definitions

  • the invention relates to a method for hydrating metal oxide layers having metal parts.
  • an aluminum component is present as the metal part, a thin, so-called natural aluminum oxide layer spontaneously forms on the surface under atmospheric conditions, which gives the aluminum component a relatively good corrosion protection.
  • Anodic (electrolytic) oxidation of the aluminum component makes it possible to form a porous anodic aluminum oxide layer on the surface, which is very hard and resistant to wear. Due to its pore structure, the anodic aluminum oxide layer has a very large surface area.
  • the aluminum oxide layer is hydrated. In this case, water is stored in the form of crystal water in the initially amorphous aluminum oxide layer. The volume of this alumina hydrate is greater than that of the alumina, so that the pores of the alumina layer are filled and sealed.
  • Anodized aluminum components withstand many mechanical and chemical stresses due to their aluminum oxide layer.
  • anodic oxide layers are attacked in both alkaline and acidic solutions.
  • Such solutions are increasingly used in the cleaning of aluminum components.
  • the surface is covered with highly transparent coatings.
  • Particularly suitable are so-called SolGel lacquers based on SiO 2 .
  • Such coating systems are baked after application by dipping, spraying, rolling or casting in an oven at temperatures up to 300 ° C. During this firing, the SiO 2 crosslinks, so that the layer can thereby develop its protective properties.
  • the invention is therefore based on the object, the above To avoid disadvantages.
  • a method for solving this problem Hydration of metal oxide layers containing metal parts provided in which the hydrating only in the area of one opposite the thickness of the metal oxide layer thinner, outboard Surface layer by stopping the hydration process for obtaining a partially hydrated metal oxide layer is carried out.
  • a metal part which is a Metal oxide layer produced in particular by anodizing can not be "completely” hydrated, so that the pores the oxide layer does not fill up completely, but they become only in the area of the surface, ie in the surface layer mentioned locked.
  • the surface layer forms only a part the thickness of the entire metal oxide layer. So that's just one partial densification or hydration before.
  • the metal oxide layer is generated by anodizing. Among them is especially one to understand electrolytic treatment method.
  • the metal part may consist of pure metal or of a Alloy.
  • it is provided that it is the metal part around an aluminum part or aluminum alloy part with one the metal oxide layer forming aluminum oxide layer or Aluminum alloy oxide layer.
  • the partial hydration may preferably be carried out with hot Water or with hot steam. Especially a hot water bath is used.
  • the partial hydration is preferred with a Temperature less than 100 ° C, in particular with a temperature of 65 ° C to 99 ° C, performed.
  • the water bath has a temperature less than 100 ° C, in particular a temperature of 65 ° C to 99 ° C, on.
  • the partial hydration over a Treatment period of 0.5 to 120 minutes can be provided.
  • additives are added.
  • the additives are in particular polycarbonates, polyhydroxy compounds, Polyhydroxycarboxylates, polyphosphonates and / or polycarboxylic acids.
  • the partially hydrated metal part or its partially hydrated metal oxide layer is preferred with a surface coating Mistake.
  • a surface coating Mistake are in particular a transparent, in particular a highly transparent surface coating.
  • a ceramic surface coating be applied.
  • This ceramic surface coating is designed as a thin-ceramic coating, the means, it has a thickness of 0.2 to 7 ⁇ , in particular from 0.5 to 5 ⁇ on.
  • the surface coating can be sprayed, rolled, Casting or diving, preferably with electrostatic support, be applied.
  • the surface coating becomes particular cured by heating.
  • the surface coating used is in particular silica or a coating comprising silica.
  • the invention relates to a metal part with a hydrated metal oxide layer.
  • the metal oxide layer is only in the area of one opposite their thickness thinner, outer surface layer by stopping the hydrating process for obtaining one only hydrated partially hydrated metal oxide layer.
  • a metal part is an aluminum part or aluminum alloy part.
  • Whose Aluminum oxide layer or aluminum alloy oxide layer is preferably an anodized aluminum oxide layer or Aluminiumlegleitersoxid für.
  • On the surface this layer is preferably a ceramic coating, in particular a thin ceramic coating.
  • the process of anodizing, hydrating and coating, in particular a coating with a SolGel system is as follows:
  • the aluminum part is degreased. optional It can be mechanically polished before degreasing. After this Degreasing is followed by a rinse. If optional after degreasing a pickling is provided, it is first rinsed, then pickled and then rinsed again. Next comes an acidic Pickling. At this point can also be provided: Optional Rinsing, optional chemical or electrochemical glazing, optional Rinse, optional alkaline decoction, optional rinse, optional picking sour, with all or some of these processes in succession or only one of these operations is / will be performed.
  • the aluminum part is anodized, which in particular takes place electrolytically. Afterwards, a rinse is done carried out.
  • the hydration takes place only in the area opposite the thickness of the aluminum oxide layer thinner, outer surface layer by stopping the hydration process for the Obtaining an only partially hydrated aluminum oxide layer.
  • the Hydration is in a hot water at a Temperature of 65 ° C to 99 ° C and a treatment time of less than 3 minutes per ⁇ m of the aluminum oxide layer.
  • additives such as polycarbonates, Polyhydroxy compounds, polyhydroxycarboxylates, polyphosphonates and / or polycarboxylic acids added.
  • the Surface of the partially hydrated aluminum part with a ceramic surface coating with a thickness of 0.5 to 5 provided.
  • a heat treatment especially in the range of 150 to 300 ° C, the coating crosslinked.
  • the coating is a SolGel system or other low-molecular paint systems.
  • the surface coating has in particular silicon dioxide.
  • FIG. 1 shows a section through the mentioned aluminum part 1, which has an aluminum oxide layer 2.
  • the thickness of the aluminum oxide layer 2 is marked D. It can be seen that the Alumina layer 2 a plurality of open at the surface 3 Having pores 4.
  • the aluminum oxide layer 2 of the aluminum part 1 was prepared by anodizing, ie electrolytic treatment, generated.
  • FIG. 2 It can be seen from FIG. 2 that the aluminum part 1 of FIG. 1 partially hydrated.
  • the treatment took place in a hot Water bath and was not completed, but broken off.
  • the pores 4 have not completely filled and closed, but the hydration has only in the range of a surface layer 5 of the alumina layer 2 so took place that the pores 4 filled only in the upper area and closed but are still within the alumina layer 2, now, however, with a shortened length, are.
  • the aluminum oxide layer 2 is thus composed of a pore 4 having Base layer 6 of thickness X and the overlying outer, hydrated surface layer 5 of thickness Y together.
  • D X + Y.
  • a surface coating 7 was applied to the surface 3 of the partially hydrated aluminum oxide layer 2 according to FIG. This is a thin-ceramic surface coating which - due to the closed pores 4- can not or only slightly penetrate into the partially hydrated aluminum oxide layer 2.
  • the applied ceramic surface layer 7 was crosslinked.
  • the surface coating is 5 to 7 microns thick and has SiO 2 .
  • the inventive method at Use aluminum parts for the automotive industry. That's the way it is possible, for example, trim strips and the like by means of the said process steps optically very attractive train.
  • the method may also be used for household items, For example, cake pans, pans, pans and the like be used.
  • the coating material is a SolGel system used.

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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)
  • General Chemical & Material Sciences (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Laminated Bodies (AREA)
  • Chemically Coating (AREA)
EP03022760.7A 2002-10-10 2003-10-10 Procédé pour hydrater l'oxyde de métal pose sur des pièces en métal Expired - Lifetime EP1486588B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200332561T SI1486588T1 (en) 2002-10-10 2003-10-10 Method for the hydrogenation of metal parts with metallo-oxide layers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20220540U 2002-10-10
DE20220540 2002-10-10

Publications (3)

Publication Number Publication Date
EP1486588A2 true EP1486588A2 (fr) 2004-12-15
EP1486588A3 EP1486588A3 (fr) 2006-09-06
EP1486588B1 EP1486588B1 (fr) 2017-12-13

Family

ID=33185814

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03022760.7A Expired - Lifetime EP1486588B1 (fr) 2002-10-10 2003-10-10 Procédé pour hydrater l'oxyde de métal pose sur des pièces en métal

Country Status (6)

Country Link
EP (1) EP1486588B1 (fr)
ES (1) ES2658830T3 (fr)
HU (1) HUE036817T2 (fr)
PT (1) PT1486588T (fr)
SI (1) SI1486588T1 (fr)
TR (1) TR201802092T4 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2824221A1 (fr) * 2013-07-12 2015-01-14 Eloxal Höfler GmbH Procédé de fabrication d'un substrat d'aluminium résistant à la corrosion et à l'usure
EP2904131A1 (fr) * 2012-10-08 2015-08-12 Süddeutsche Aluminium Manufaktur GmbH Procédé de production d'un revêtement sol-gel sur une surface à revêtir d'un composant et composant correspondant
US11312107B2 (en) * 2018-09-27 2022-04-26 Apple Inc. Plugging anodic oxides for increased corrosion resistance

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB965837A (en) * 1962-06-19 1964-08-06 Charles Calvin Cohn Treatment of aluminum oxide coatings
US3440150A (en) * 1966-02-10 1969-04-22 Martin Marietta Corp Dual-seal anodized aluminum
BE817875A (fr) * 1973-07-30 1974-11-18 Procede pour augmenter l'adherence d'une couche isolante photoconductrice sur un substrat conducteur et application a un element de formation d'image utilise dans un appareil electrophotographique

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2904131A1 (fr) * 2012-10-08 2015-08-12 Süddeutsche Aluminium Manufaktur GmbH Procédé de production d'un revêtement sol-gel sur une surface à revêtir d'un composant et composant correspondant
EP2824221A1 (fr) * 2013-07-12 2015-01-14 Eloxal Höfler GmbH Procédé de fabrication d'un substrat d'aluminium résistant à la corrosion et à l'usure
WO2015003798A1 (fr) * 2013-07-12 2015-01-15 Eloxal Höfler Gmbh Procédé de fabrication d'un substrat en aluminium résistant à la corrosion et à l'usure
US11312107B2 (en) * 2018-09-27 2022-04-26 Apple Inc. Plugging anodic oxides for increased corrosion resistance

Also Published As

Publication number Publication date
HUE036817T2 (hu) 2018-07-30
TR201802092T4 (tr) 2018-03-21
ES2658830T3 (es) 2018-03-12
PT1486588T (pt) 2018-02-27
EP1486588A3 (fr) 2006-09-06
SI1486588T1 (en) 2018-03-30
EP1486588B1 (fr) 2017-12-13

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