EP0090266A2 - Bain et procédé d'anodisation des pièces aluminées - Google Patents

Bain et procédé d'anodisation des pièces aluminées Download PDF

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Publication number
EP0090266A2
EP0090266A2 EP83102612A EP83102612A EP0090266A2 EP 0090266 A2 EP0090266 A2 EP 0090266A2 EP 83102612 A EP83102612 A EP 83102612A EP 83102612 A EP83102612 A EP 83102612A EP 0090266 A2 EP0090266 A2 EP 0090266A2
Authority
EP
European Patent Office
Prior art keywords
bath
anodizing
parts
aluminum
aluminized
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Withdrawn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
EP83102612A
Other languages
German (de)
English (en)
Other versions
EP0090266A3 (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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP0090266A2 publication Critical patent/EP0090266A2/fr
Publication of EP0090266A3 publication Critical patent/EP0090266A3/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Withdrawn legal-status Critical Current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
    • C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used

Definitions

  • the invention relates to a bath for anodizing aluminized parts from a sulfuric acid, aqueous solution which contains additives, and to a method for producing anodizing layers, which is carried out using such a bath.
  • 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.
  • aluminized objects e.g. made of ferrous material
  • insufficient coverage e.g. non-coated contact points or, in the case of profiled parts, the uncoated areas which may be present in non-aqueous aluminum baths and in the case of vapor deposition processes due to the limited spreadability
  • cover film e.g. non-coated contact points or, in the case of profiled parts, the uncoated areas which may be present in non-aqueous aluminum baths and in the case of vapor deposition processes due to the limited spreadability
  • varnishes of this type must be removed by either peeling them off or removing them with a suitable solvent. With cavities or holes, in those who do not have aluminum can be helped by sealing them with plugs or the like. This procedure, which is possible in principle, is technically complex and uneconomical.
  • the object of the invention is therefore to provide a bath for anodizing aluminized parts, in which • the disadvantages described above do not occur, with the aid of which it is possible, in particular, to be able to produce homogeneously connected, sufficiently thick oxide layers in a simple and economical manner if the substrate surface is not covered with aluminum on all sides.
  • this object is achieved with a bath which contains 1050 to 1400 g of sulfuric acid with a density of 1.84 per liter of anodizing bath. This corresponds to approx. 70 - 80 mass%.
  • the workpieces made of e.g. galvanically aluminized iron, copper and their alloys no longer showed any anodic resolution or dissolution restricting the use of the workpiece.
  • the bath for anodizing also contains 1 to 100 g of a polyhydric alcohol, preferably 10 to 30 g of glycerol and 1 to 100 g of a polybasic organic acid, in particular 1 to 80 g of oxalic acid, per liter.
  • the invention further relates to a method for anodizing aluminized parts using a bath of the composition specified above, which is characterized in that the bath is operated at a pH below 1 and a current density of 0.5 to 3 A / dm 2 , preferably 0.5 to 1.5 A / dm 2 at 0 to 30 ° C.
  • the method according to the invention is advantageous for anodizing base materials provided with aluminum flame spraying layers, roll-cladding layers, fire aluminum layers, PVD aluminum layers and in particular IVD aluminum layers, wherein the layers can also be partially applied to the workpiece.
  • the method according to the invention is suitable for parts coated with "galvanoaluminium" in aprotic media.
  • "Galvanoaluminium” is an aluminum of high purity (> 99.99), good electrical conductivity and high ductility (20 HVh, which is obtained by deposition from organoaluminum electrolytes.
  • partially aluminized parts preferably iron, zinc and copper materials
  • partially aluminized parts preferably iron, zinc and copper materials
  • the figure shows in section an embodiment of a hinge 1 of a spectacle frame made of nickel silver 4, which has an aluminum layer 2.
  • the oxide layer applied to this according to the invention is designated by 3.
  • test specimens 1 to 3 were anodized according to the GS anodizing process and colored with an organic, water-soluble dye.
  • test specimens 4 to 6 were anodized by the method according to the invention and also colored as above.
  • test specimens 1 to 3 While the test specimens 1 to 3 have strong seizures after 15 minutes of anodizing and can no longer be colored decoratively, the test specimens 4 to 6 show almost no signs of corrosion and are perfect in appearance.
  • the thickness of the anodized layer is approx. 10 ⁇ m after 30 minutes.

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)
  • Electrochemical Coating By Surface Reaction (AREA)
  • Electroplating And Plating Baths Therefor (AREA)
  • Electroplating Methods And Accessories (AREA)
EP83102612A 1982-03-30 1983-03-16 Bain et procédé d'anodisation des pièces aluminées Withdrawn EP0090266A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823211782 DE3211782A1 (de) 1982-03-30 1982-03-30 Bad und verfahren zum anodisieren von aluminierten teilen
DE3211782 1982-03-30

Publications (2)

Publication Number Publication Date
EP0090266A2 true EP0090266A2 (fr) 1983-10-05
EP0090266A3 EP0090266A3 (fr) 1985-05-02

Family

ID=6159755

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83102612A Withdrawn EP0090266A3 (fr) 1982-03-30 1983-03-16 Bain et procédé d'anodisation des pièces aluminées

Country Status (4)

Country Link
US (1) US4455201A (fr)
EP (1) EP0090266A3 (fr)
JP (1) JPS58177494A (fr)
DE (1) DE3211782A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105088309A (zh) * 2015-08-28 2015-11-25 华南理工大学 一种压铸铝合金的高效节能阳极氧化处理方法

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10022074A1 (de) * 2000-05-06 2001-11-08 Henkel Kgaa Elektrochemisch erzeugte Schichten zum Korrosionsschutz oder als Haftgrund
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
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
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
US20100028652A1 (en) * 2008-07-29 2010-02-04 Chung Shan Institute Of Science And Technology, Armaments Bureau, M.N.D. Metal structure with anti-erosion wear-proof and manufactured method thereof
US9701177B2 (en) 2009-04-02 2017-07-11 Henkel Ag & Co. Kgaa Ceramic coated automotive heat exchanger components
JP5642362B2 (ja) * 2009-08-14 2014-12-17 公益財団法人神奈川科学技術アカデミー 陽極酸化ポーラスアルミナおよびその製造方法
CN102787340A (zh) * 2012-08-07 2012-11-21 重庆万力联兴实业(集团)有限公司 铝合金硬质阳极氧化电解液
JP5642861B2 (ja) * 2013-09-30 2014-12-17 公益財団法人神奈川科学技術アカデミー 陽極酸化ポーラスアルミナおよびその製造方法
JP6764517B1 (ja) * 2019-11-08 2020-09-30 ドングァン ディーエスピー テクノロジー カンパニー リミテッド アルミニウム表面処理方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1869042A (en) * 1930-06-23 1932-07-26 Aluminum Colors Inc Process of coating aluminum
DE616812C (fr) * 1932-01-26
US3252875A (en) * 1961-11-09 1966-05-24 Aluminum Co Of America Aluminum anodizing method
DE1246350B (de) * 1963-03-15 1967-08-03 Langbein Pfanhauser Werke Ag Elektrolyt zur anodischen Oxydation von mit Aluminium plattierten oder auf andere Weise verbundenen Gegenstaenden aus Eisen oder Nichteisenmetallen
SU466298A1 (ru) * 1969-12-08 1975-04-05 Предприятие П/Я Р-6209 Способ анодировани алюмини и его сплавов
ZA732156B (en) * 1972-05-12 1974-01-30 Egyesuelt Izzolampa Electric discharge lamp
JPS4930341A (fr) * 1972-07-13 1974-03-18
JPS5249943A (en) * 1975-10-20 1977-04-21 Hokusei Aluminium Co Ltd Process for anodizing aluminum or its alloy
JPS5258026A (en) * 1975-11-07 1977-05-13 Riken Keikinzoku Kogyo Kk Process for forming selffcolor anodic oxidation coating on aluminum or its alloy

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105088309A (zh) * 2015-08-28 2015-11-25 华南理工大学 一种压铸铝合金的高效节能阳极氧化处理方法

Also Published As

Publication number Publication date
US4455201A (en) 1984-06-19
DE3211782A1 (de) 1983-10-06
EP0090266A3 (fr) 1985-05-02
JPS58177494A (ja) 1983-10-18

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RIN1 Information on inventor provided before grant (corrected)

Inventor name: DE VRIES, HANS

Inventor name: STOEGER, KLAUS

Inventor name: BIRKLE, SIEGFRIED, DR.