WO2012111739A1 - 金属部材の表面処理方法及びそれにより得られた金属部材 - Google Patents
金属部材の表面処理方法及びそれにより得られた金属部材 Download PDFInfo
- Publication number
- WO2012111739A1 WO2012111739A1 PCT/JP2012/053635 JP2012053635W WO2012111739A1 WO 2012111739 A1 WO2012111739 A1 WO 2012111739A1 JP 2012053635 W JP2012053635 W JP 2012053635W WO 2012111739 A1 WO2012111739 A1 WO 2012111739A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- metal member
- fluorine
- anodized film
- based polymer
- sealing treatment
- Prior art date
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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
-
- 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
-
- 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
- C25D11/22—Electrolytic after-treatment for colouring layers
-
- 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
-
- 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
- C25D11/26—Anodisation of refractory metals or alloys based thereon
-
- 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
- C25D11/30—Anodisation of magnesium or alloys based thereon
Definitions
- the present invention relates to a surface treatment method for an anodizable metal member and a metal member having improved surface characteristics.
- a metal member made of aluminum and its alloy, magnesium and its alloy, titanium and its alloy, etc. is widely subjected to an anodic oxide film treatment for the purpose of improving corrosion resistance, improving design and the like.
- the anodic oxide film alone may have insufficient corrosion resistance for long-term use.
- dirt easily adheres.
- a coloring step such as secondary electrolytic coloring after the anodizing treatment
- the discoloration is large due to insufficient corrosion resistance of the anodized film.
- a clear coating by anion electrodeposition coating or the like is performed after anodizing treatment.
- Patent Document 1 discloses a technique for forming a PTFE (polytetrafluoroethylene) coating layer on the surface of an alumite film, which is intended to prevent wax rim bars.
- PTFE polytetrafluoroethylene
- Patent Document 2 discloses a process of immersing the amorphous fluororesin in a solution containing a hydrophilic amorphous fluororesin for the purpose of allowing the amorphous fluororesin to enter the pores of the anodized film, but it is not sufficient in quality alone. Preliminary heat treatment is performed, and a fluororesin layer must be polymerized and laminated thereon by heating at 200 ° C. for 30 minutes. Therefore, the coating layer disclosed in the publication is also thick and has a coating-like texture, and when heated to a high temperature of 200 ° C., there is a problem that the anodized film is crisp.
- An object of the present invention is to provide a surface treatment method having improved surface characteristics while maintaining the metal texture of the surface of the metal member, and a metal member obtained thereby.
- the surface-treated metal member according to the present invention is made of fluorine having a thickness of 100 nm or less by subjecting the surface of the anodized film formed on the metal surface to the surface of the anodized film before contact with the fluorine polymer solution and then subjecting the surface to a water vapor sealing treatment. It is characterized by having a system polymer layer and a composite sealing treatment layer continuously formed thereunder, in which a fluorine-based polymer has entered the pores of the anodized film.
- the present invention includes those having an electrolytic coloring step after the formation of the anodized film, as long as the fluoropolymer solution is brought into contact before the sealing treatment and the water vapor sealing treatment is performed.
- a step of forming a porous anodic oxide film on the metal surface As a surface treatment of such a metal member, a step of forming a porous anodic oxide film on the metal surface, and a step of bringing the anodic oxide film into contact with a fluoropolymer solution in an unsealed or semi-sealed state; And a step of performing a water vapor sealing process thereafter.
- an electrolytic coloring step may be provided between the step of forming the anodized film and the step of contacting with the fluoropolymer solution.
- the present invention has a composite sealing treatment layer formed by water vapor sealing in a state in which a fluorine-based polymer has entered the pores of the anodized film from the viewpoint of emphasizing the metal texture of the metal surface.
- the thickness of the fluorine-based polymer layer continuously formed thereon may be thin.
- the thickness of the fluoropolymer layer may be 100 nm or less, and preferably 10 nm or less.
- the metal member applied to the present invention is a material that can form a porous anodic oxide film, and mainly includes aluminum, magnesium, titanium, and alloys thereof. Further, the type of the anodized film is not particularly limited as long as it is porous, and the anodized film is anodized using a known electrolyte such as sulfuric acid or organic acid.
- the term “before sealing treatment” means that before the sealing treatment with water vapor, including those washed with water after anodizing, those washed with hot water, and those half-sealed with hot water at 60 to 90 ° C. included. Also included are those that are washed with water after anodization, electrolytically colored, and then washed with water and hot water.
- electrolytic coloring is before sealing treatment, and after the formation of the anodized film, DC electrolysis, AC electrolysis treatment, etc. are performed in an aqueous solution containing various metal ions such as nickel ions and tin ions, and metal ions are introduced into the pores. It means to precipitate.
- the water vapor sealing treatment refers to a sealing treatment using normal pressure or pressurized water vapor.
- the fluoropolymer used in the present invention is a fluoropolymer having a molecular weight that can be dissolved in a solvent to form a solution.
- polytetrafluoroethylene, copolymers of polytetrafluoroethylene such as ethylene-tetrafluoroethylene copolymer, polyvinyl fluoride and copolymers thereof, polyvinylidene fluoride and copolymers thereof, polychlorotrifluoroethylene and The copolymer etc. are mentioned as an example.
- a fluoropolymer having a perfluoroalkyl group imparted with water repellency and oil repellency and improved antifouling property is also effective.
- polyperfluoroalkyl (meth) acrylate poly 2- (perfluoroalkyl) ethyl (meth) acrylate, tetrafluoroethylene-perfluoroalkyl vinyl ether, polyperfluoroalkyl vinyl, poly 2- (perfluoroalkylethyl vinyl), etc.
- the solvent used in the present invention may be an organic solvent such as ketones such as acetone, MEK and MIBK, ethyl acetate, butyl acetate, diethyl ether, dioxane, ethanol, isopropyl alcohol, etc., but a fluorine-based polymer having high affinity with the fluorine-based polymer. Solvents are preferred. In addition, fluorine-based solvents do not require special exhaust and explosion-proof equipment. Examples of the fluorine-based solvent include perfluorocarbon, hydrofluorocarbon, hydrochlorofluorocarbon, hydrofluoroether, perfluoropolyether, hydrofluoropolyether and the like. Further, in the present invention, contacting with the fluoropolymer solution means that any means such as dipping, spraying, brushing, etc. can be selected.
- the surface-treated metal member according to the present invention has a composite sealing treatment layer in which a fluoropolymer has entered into the pores of the anodized film, so that it has excellent adhesion and is continuously formed on the fluoropolymer. Since the layer is as thin as 100 nm or less, a conventional film-like texture does not appear. As a result, it has excellent long-term corrosion resistance, and the water- and oil-repellent properties of the fluorine-based polymer make it difficult to get dirt and can be easily cleaned simply by wiping. In addition, in the case of electrolytic coloring, discoloration of the colored color tone can be suppressed by improving the corrosion resistance of the anodized film.
- the preparation conditions of the test sample are shown.
- the evaluation result of a test sample is shown.
- An SEM image is shown.
- the component analysis result of a film cross section is shown.
- the evaluation result of the test sample colored secondary electrolytically is shown.
- the photograph after the test of a secondary electrolytic coloring film is shown.
- Example 1 was washed with water after forming the anodized film, and Example 2 was subjected to semi-sealing treatment (washing) at 80 ° C. for 10 minutes using pure water after forming the anodized film.
- Comparative Example 1 boiling water was sealed at 100 ° C. for 20 minutes using pure water after the formation of the anodized film.
- Comparative Example 2 a primer for a fluororesin was applied after the sealing treatment of Comparative Example 1, and then dipped into the fluoropolymer solution and dried.
- Comparative Example 3 was the same as Example 2 up to the step of dipping into a fluoropolymer solution, and then dried without a water vapor sealing treatment.
- Comparative Example 4 after the formation of the anodized film, the same process as in Example 2 was carried out until dipping into the fluorine-based polymer solution, and then boiling water was sealed with pure water at 100 ° C. for 20 minutes.
- the samples obtained in Examples 1 to 3 and Comparative Examples 1 to 4 were visually evaluated for appearance, and then a 200 Hr salt spray test was performed based on JIS Z 2371 to measure the color difference before and after the test (color).
- Color difference meter CR-400 manufactured by KONICA MINOLTA).
- the table of FIG. 1 shows the test sample preparation conditions, and FIG. 2 shows the evaluation results.
- DIP means dipping.
- any of the test samples of Examples 1 to 3 maintained the texture of the metal surface as it was, and no surface change was observed before and after the salt spray test.
- the surface of Comparative Example 1 was slightly whitened, and Comparative Example 2 was observed after the primer, and the texture was inferior. Since Comparative Example 3 was not dipped into a fluorine-based polymer solution and then steam sealed, whitening (discoloration) was observed in the salt spray test.
- boiling water sealing was carried out after dipping in a fluoropolymer solution, and the surface was slightly whitened. From this, it became clear that dipping or spraying the fluorine-based polymer solution to the fluorine-based polymer solution is insufficient and the subsequent water vapor sealing treatment is effective.
- FIG. 3 shows an SEM photograph.
- FIG. 4 shows component analysis values for the surface, the upper section and the lower section of FIG. As a result, the thickness of the fluoropolymer layer on the surface was so thin that the thickness could not be measured.
- Example 4 and Comparative Example 5 the photograph after the test of Example 4 and Comparative Example 5 is shown in FIG.
- FIG. 1 the photograph after the test of Example 4 and Comparative Example 5 is shown in FIG.
- a fluorine-based polymer layer in the secondary electrolytically colored anodic oxide film it was possible to improve the corrosion resistance while maintaining the metal texture on the surface by forming a fluorine-based polymer layer in the secondary electrolytically colored anodic oxide film and subjecting it to water vapor sealing treatment.
- the present invention is a surface treatment method suitable for a metal member capable of forming a porous anodic oxide film, and can be applied to many fields such as automobile parts as long as it is a field using such a metal member.
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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)
- Laminated Bodies (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012558003A JP5878133B2 (ja) | 2011-02-18 | 2012-02-16 | 金属部材の表面処理方法 |
EP12747582.0A EP2677068A4 (en) | 2011-02-18 | 2012-02-16 | METHOD FOR SURFACE TREATMENT OF A METALLIC ELEMENT AND METAL ELEMENT THUS OBTAINED |
US14/000,123 US20130319868A1 (en) | 2011-02-18 | 2012-02-16 | Surface treatment method for metal member and metal member obtained by the same |
CN201280008871.7A CN103392030B (zh) | 2011-02-18 | 2012-02-16 | 金属部件的表面处理方法以及由该方法得到的金属部件 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011-033126 | 2011-02-18 | ||
JP2011033126 | 2011-02-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012111739A1 true WO2012111739A1 (ja) | 2012-08-23 |
Family
ID=46672651
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/053635 WO2012111739A1 (ja) | 2011-02-18 | 2012-02-16 | 金属部材の表面処理方法及びそれにより得られた金属部材 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20130319868A1 (zh) |
EP (1) | EP2677068A4 (zh) |
JP (1) | JP5878133B2 (zh) |
CN (1) | CN103392030B (zh) |
WO (1) | WO2012111739A1 (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2509335A (en) * | 2012-12-31 | 2014-07-02 | Univ Tartu | Double-structured corrosion resistant coatings and methods of application |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102012005308B4 (de) | 2011-12-23 | 2022-03-17 | Wabco Gmbh | Druckluftversorgungsanlage, Druckluftversorgungssystem und Fahrzeug, insbesondere PKW, mit einer Druckluftversorgungsanlage |
CN106191961B (zh) * | 2014-05-22 | 2017-11-21 | 江苏理工学院 | 一种铝合金表面处理中的封闭处理方法 |
US9359686B1 (en) | 2015-01-09 | 2016-06-07 | Apple Inc. | Processes to reduce interfacial enrichment of alloying elements under anodic oxide films and improve anodized appearance of heat treatable alloys |
US20160289858A1 (en) * | 2015-04-03 | 2016-10-06 | Apple Inc. | Process to mitigate grain texture differential growth rates in mirror-finish anodized aluminum |
GB2541756C (en) * | 2015-08-28 | 2021-03-17 | Tata Motors European Technical Ct Plc | Coated substrate and method of fabrication thereof |
US9970080B2 (en) | 2015-09-24 | 2018-05-15 | Apple Inc. | Micro-alloying to mitigate the slight discoloration resulting from entrained metal in anodized aluminum surface finishes |
WO2017165634A1 (en) * | 2016-03-23 | 2017-09-28 | Maxterial, Inc. | Articles including adhesion enhancing coatings and methods of producing them |
US10174436B2 (en) | 2016-04-06 | 2019-01-08 | Apple Inc. | Process for enhanced corrosion protection of anodized aluminum |
US11352708B2 (en) | 2016-08-10 | 2022-06-07 | Apple Inc. | Colored multilayer oxide coatings |
US11242614B2 (en) | 2017-02-17 | 2022-02-08 | Apple Inc. | Oxide coatings for providing corrosion resistance on parts with edges and convex features |
EP3682046B1 (en) * | 2017-09-15 | 2023-06-21 | Oerlikon Surface Solutions AG, Pfäffikon | Method for producing coating with colored surface |
US11549191B2 (en) | 2018-09-10 | 2023-01-10 | Apple Inc. | Corrosion resistance for anodized parts having convex surface features |
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JPH06184793A (ja) * | 1992-12-21 | 1994-07-05 | Mitsubishi Heavy Ind Ltd | アルミニウム合金製品の表面処理方法 |
JPH11104560A (ja) * | 1997-10-03 | 1999-04-20 | Sky Alum Co Ltd | 樹脂塗装アルミニウム合金部材およびその製造方法 |
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- 2012-02-16 CN CN201280008871.7A patent/CN103392030B/zh not_active Expired - Fee Related
- 2012-02-16 WO PCT/JP2012/053635 patent/WO2012111739A1/ja active Application Filing
- 2012-02-16 EP EP12747582.0A patent/EP2677068A4/en not_active Withdrawn
- 2012-02-16 JP JP2012558003A patent/JP5878133B2/ja not_active Expired - Fee Related
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GB2509335A (en) * | 2012-12-31 | 2014-07-02 | Univ Tartu | Double-structured corrosion resistant coatings and methods of application |
Also Published As
Publication number | Publication date |
---|---|
CN103392030B (zh) | 2017-02-15 |
US20130319868A1 (en) | 2013-12-05 |
EP2677068A4 (en) | 2016-10-05 |
JP5878133B2 (ja) | 2016-03-08 |
EP2677068A1 (en) | 2013-12-25 |
JPWO2012111739A1 (ja) | 2014-07-07 |
CN103392030A (zh) | 2013-11-13 |
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