WO2016093782A1 - Système d'oxydation anodique à base de gel polymère - Google Patents

Système d'oxydation anodique à base de gel polymère Download PDF

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Publication number
WO2016093782A1
WO2016093782A1 PCT/TR2015/050214 TR2015050214W WO2016093782A1 WO 2016093782 A1 WO2016093782 A1 WO 2016093782A1 TR 2015050214 W TR2015050214 W TR 2015050214W WO 2016093782 A1 WO2016093782 A1 WO 2016093782A1
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WO
WIPO (PCT)
Prior art keywords
anodic oxidation
polymeric gel
oxidation process
subjected
gel based
Prior art date
Application number
PCT/TR2015/050214
Other languages
English (en)
Inventor
Yasar YILMAZ
Sevcan TABANLI
Ali GELIR
Original Assignee
Istanbul Teknik Universitesi
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 Istanbul Teknik Universitesi filed Critical Istanbul Teknik Universitesi
Publication of WO2016093782A1 publication Critical patent/WO2016093782A1/fr

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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
    • C25D11/005—Apparatus specially adapted for electrolytic conversion coating
    • 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
    • C25D11/022—Anodisation on selected surface areas
    • 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
    • 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
    • C25D11/14—Producing integrally coloured layers
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/10—Electrodes, e.g. composition, counter electrode

Definitions

  • the present invention relates to a polymeric gel based anodic oxidation system which is developed in order to perform anodic oxidation process faster, safer and in a more compact way.
  • anodic oxidation anodization
  • eloxal The process which is called as anodic oxidation, anodization, or eloxal is simply performed by submerging a metal plate as anode into an electrolyte and passing direct current between the anode and the cathode.
  • the most commonly used metal in commercial applications of anodic oxidation is aluminum.
  • tantalum, niobium, zirconium, and hafnium come after aluminum.
  • the studies of anodic oxidation of titanium are used for biological applications.
  • anodic oxidation process is performed in large tanks called anodization bath in which the acid comprising electrolyte is present, and the time for anodization process varies between 30-60 minutes.
  • Anodic oxidized aluminum materials are commonly used in both decorative and industrial applications.
  • the oxide layer formed on the aluminum surface is very tight and covers the surface of the aluminum very well. Thus, it protects the aluminum against corrosion. Additionally, it is a preferred surface process since it prevents oxidation in electronic materials.
  • the structure of the oxide layer which is formed depends on the type of the electrolyte. If an electrolyte which cannot solve the oxide layer is used, a barrier oxide layer with high density is formed. If the oxide layer which is formed dissolves during the process, a porous oxide layer is formed.
  • Porous oxide layers with coloring pigments are especially preferred for architectural applicationsv
  • the electrodes are put in a suitable electrolyte (acidic solution), and the oxidation is performed under the applied potential.
  • electrolyte acidic solution
  • this method has several drawbacks and insufficiencies. Some of these are explained below.
  • the acidic solution used for the anodic oxidation of aluminum is present freely in the anodization tank. Especially for large aluminum plates used in the industry, large amounts of acidic solution in large tanks are used. Using these large and open tanks comprising acid poses great danger for both workers and the environment.
  • the oxidation time of aluminum is quite long.
  • a potential must be applied to the anodization system for hours an days. This situation causes both time and energy loss.
  • the structure of the oxide layer formed on the aluminum surface depends on the type of the electrolyte used in the anodization bath. In this method, only one type of oxide layer can be formed on the metal surface. It is not possible to form an oxide layer having different properties at the same time on a surface by using a liquid electrolyte.
  • Aluminum ions which are dissolved by being affected from the electrolyte during the anodization will disperse in to the electrolyte.
  • the aluminum ions present in the electrolyte reach a certain concentration, either electrolyte should be changed or the concentration of the aluminum should be decreased with several chemical processes. This situation causes both time loss and an increase the cost.
  • the aim of the present invention is to provide a polymeric gel based anodic oxidation system and method in which anodic oxidation process is performed faster, safer and in a more compact way.
  • Another aim of the present invention is to provide a polymeric gel based anodic oxidation system and method wherein the process time is decreased by increasing the reaction efficiency by trapping the electrolyte comprising acid inside the polymeric gel, and the amount of the acidic solution and the concentration required for the anodization is decreased.
  • Yet another aim of the present invention is to provide a polymeric gel based anodic oxidation system and method wherein different types of oxide layers are formed on one part of metal surface being barrier and one part of metal surface being porous by changing the type of the solution trapped inside the polymeric gel, and which has an application flexibility and functionality.
  • FIG. 1 The schematic view of the polymeric gel based anodic oxidation system.
  • the components shown in Figure 1 are each given reference numbers as follows:
  • a polymeric gel based anodic oxidation system (1) which is developed in order to fulfill the objective of the invention comprises
  • At least one fixed platform (2) which carries the material to be subjected to anodic oxidation process
  • At least one polymeric gel layer (3) in which acid solution is trapped at least one conductive layer (4) which is present on the polymeric gel layer (3) and which provides electrical contact in order to apply potential to the material to be subjected to anodic oxidation process,
  • the material to be subjected to anodic oxidation process is preferably in form of a plate made from aluminum.
  • the fixed platform (2) carrying the material to be subjected to anodic oxidation is conductive.
  • various molecules, dye pigments and/or metals are added into the acidic solution trapped in the polymeric gel layer (3) in order to control the color of the oxide layer formed as a result of the anodic oxidation.
  • the acidic solution trapped in the gel does not leak out the gel in any way. Therefore, the acidic solution is kept in a more compact system instead of open tanks. This new system significantly increases the safety of the procedure.
  • the conductive plate (4) present on the polymeric gel layer (3) is made from platinum material.
  • the mesh structure of the gel present in the polymeric gel layer (3) can be controlled with chemicals used in gel synthesis. Controlling mesh structure provides control ease on the anodization time and oxide structure.
  • Oxide layer in preferred areas and structure on the material to be subjected to anodic oxidation process can be provided with this method. Furthermore, it is possible to form oxide layers having different pore diameters on the same surface. In the conventional systems using liquid electrolyte, it certainly is not possible to form oxide layer in such way.
  • the amount of the acidic solution required for the anodization process is significantly decreased. For example, in the studies that were performed, oxidation was realized with only 53 ⁇ of acid solution on a surface of approximately 1 cm 2 . In addition, acid concentration required for the anodization process is decreased to half. A solution of 10% is sufficient in the developed system, while sulfuric acid solution of 20% is generally used in industrial applications.
  • Reaction efficiency between the aluminum atoms and the acidic solution trapped in the polymeric gel significantly increases. This substantially decreases the time required for the anodization process. In the studies the oxidation of 1 cm 2 was performed only in 1 minute. Therefore, both the time for the process is decreased and the energy consumption is minimized with the developed system.

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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)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La présente invention concerne un système d'oxydation anodique (I) à base de gel polymère qui est développé pour réaliser le processus d'oxydation anodique avec un système plus rapide, plus sûr et plus compact et qui comprend essentiellement au moins une plate-forme fixe (2) qui porte le matériau devant être soumis à un processus d'oxydation anodique, au moins une couche (3) de gel polymère dans laquelle une solution acide est piégée, au moins une couche conductrice (4) qui est présente sur la couche (3) de gel polymère et qui assure un contact électrique afin d'appliquer un potentiel au matériau devant être soumis à un processus d'oxydation anodique, au moins une plate-forme mobile (5) qui porte la couche (3) de gel polymère et la plaque conductrice (4), au moins une alimentation électrique (6) qui fournit le potentiel nécessaire au processus d'oxydation anodique.
PCT/TR2015/050214 2014-12-08 2015-12-01 Système d'oxydation anodique à base de gel polymère WO2016093782A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2014/14785 2014-12-08
TR201414785 2014-12-08

Publications (1)

Publication Number Publication Date
WO2016093782A1 true WO2016093782A1 (fr) 2016-06-16

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ID=55300751

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR2015/050214 WO2016093782A1 (fr) 2014-12-08 2015-12-01 Système d'oxydation anodique à base de gel polymère

Country Status (1)

Country Link
WO (1) WO2016093782A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110129853A (zh) * 2018-02-02 2019-08-16 本田技研工业株式会社 阳极氧化膜形成处理剂和阳极氧化膜形成方法
EP3752666A4 (fr) * 2018-02-13 2021-04-07 Ariel Scientific Innovations Ltd. Proc& xc9;d& xc9; d'oxydation & xc9;lectrolytique au plasma sans bain et dispositif pour la mise en & x152;uvre de celui-ci

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1585169A (fr) * 1967-08-28 1970-01-09
GB2147008A (en) * 1983-09-21 1985-05-01 British Aerospace Surface treatment
EP0867528A1 (fr) * 1997-03-27 1998-09-30 Allgemeine Gold- Und Silberscheideanstalt Ag Electrolyte sous forme de gel comportant un métal noble
WO2013092580A2 (fr) * 2011-12-19 2013-06-27 Ionbond Ag Procédé d'anodisation, revêtement décoratif, couche de protection et article associé

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1585169A (fr) * 1967-08-28 1970-01-09
GB2147008A (en) * 1983-09-21 1985-05-01 British Aerospace Surface treatment
EP0867528A1 (fr) * 1997-03-27 1998-09-30 Allgemeine Gold- Und Silberscheideanstalt Ag Electrolyte sous forme de gel comportant un métal noble
WO2013092580A2 (fr) * 2011-12-19 2013-06-27 Ionbond Ag Procédé d'anodisation, revêtement décoratif, couche de protection et article associé

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110129853A (zh) * 2018-02-02 2019-08-16 本田技研工业株式会社 阳极氧化膜形成处理剂和阳极氧化膜形成方法
US10711362B2 (en) 2018-02-02 2020-07-14 Honda Motor Co., Ltd. Anodic oxide film forming treatment agent and method of forming an anodic oxide film
EP3752666A4 (fr) * 2018-02-13 2021-04-07 Ariel Scientific Innovations Ltd. Proc& xc9;d& xc9; d'oxydation & xc9;lectrolytique au plasma sans bain et dispositif pour la mise en & x152;uvre de celui-ci

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