CN1307145A - Aluminium material surface processing method and aluminium material - Google Patents
Aluminium material surface processing method and aluminium material Download PDFInfo
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- CN1307145A CN1307145A CN00131754A CN00131754A CN1307145A CN 1307145 A CN1307145 A CN 1307145A CN 00131754 A CN00131754 A CN 00131754A CN 00131754 A CN00131754 A CN 00131754A CN 1307145 A CN1307145 A CN 1307145A
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- Prior art keywords
- aluminium
- film
- etch
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- oxide film
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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
- C25D11/16—Pretreatment, e.g. desmutting
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/20—Acidic compositions for etching aluminium or alloys thereof
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Finishing Walls (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention provides a technology by which the material is made beautiful in such a manner that the same can not be recognized as an aluminum material in its appearance of color, and the material is allowed to look better even various colors are given thereto. In this surface working method for an aluminum material in which, after pretreatment of executing etching, anodic oxidation treatment of depositing a film is executed, and a coating film is deposited thereon, the etching is executed by using acid.
Description
The present invention relates to be used for for example aluminium of building materials, outer decorated articles etc. and the method for surface finish and the aluminium of aluminum alloy materials (claiming " aluminium " in the present invention).
In the past, the building materials made of aluminium or decorative material its true qualities silvery white or bronze normally.But along with aluminium be widely used and for coordinate on every side, people get up to the color pay attention to day by day of aluminium.
Japan's special permission communique discloses a kind of like this method No. 2895537 and No. 2938781: form anode oxide film after common pre-treatment, make this oxidation film coloring with electrolytic process, and form the electrophoresis contain pigment in the above and film, the color that its grizzle etc. was not had in the past.
But through such surface working and the painted aluminium made from extrusion process or rolling looks it is can be along with the viewing angle different unsure state of a kind of color.This is owing to aluminium is to form with extrusion process or rolling, and therefore, there is countless brush line on its surface, and these brush line cause the light diffuse-reflectance.With foregoing common pretreatment process, carry out etch with alkali (NaOH) and can't eliminate brush line.
Therefore, main purpose of the present invention is, though provide a kind of can make color look beautiful almost unexpected be aluminium the technology that also can mirror with shades of colour.
For this reason, the present invention a kind ofly carries out anodic oxidation treatment after carrying out pre-treatment by etch, forms film, forms the method for surface finish of the aluminium of filming again in the above, and the feature of this method is to carry out above-mentioned etch with the acid that contains fluorochemical.
The present invention also provides the aluminium that has carried out surface working with aforesaid method.
In addition, the present invention also comprises a kind of like this aluminium, and described aluminium forms anode oxide film on the surface after carrying out pre-treatment by etch, on oxide film, form then and film, it is characterized in that, on above-mentioned surface, carry out above-mentioned etch with acid, remove brush line, form uniform bottom surface.
The present invention also comprises a kind of like this aluminium, described aluminium forms anode oxide film on the surface after carrying out pre-treatment by etch, after making this oxidation film coloring with electrolytic process, forming electrophoresis on this film films, it is characterized in that,, carry out above-mentioned etch with acid on above-mentioned surface, remove brush line, form uniform bottom surface.
At this moment, undertaken paintedly by electrolytic process, make above-mentioned oxide film bronze colour system color, by the electrophoresis processing of filming, form grey and film then, obtain brown outward appearance.
That is, in above-mentioned aluminium material surface working method, owing in pretreated etch, used the acid that contains fluorochemical, and therefore different during with use alkali etchant, can remove brush line by etch.Thus, filming on the anode oxide film that is formed by anodic oxidation treatment by the back and this oxide film can make aluminium material surface be in good state, and sense of stability is arranged, and can obtain mirroring the good appearance of color.
Formation according to above-mentioned aluminium, owing to form the uniform bottom surface of having removed brush line at aluminium material surface by pretreated etch, on this bottom surface, form anode oxide film, on oxide film, formed again and filmed, therefore, by above-mentioned film and film can make the light of reflection become stable, sense of stability is arranged, can obtain mirroring the good appearance of color.
As described in claim 4, make anode oxide film painted by electrolysis, form by electrophoresis again and film, then can demonstrate shades of colour by oxide film that overlaps each other and the color combination of filming, but this color shows owing to above-mentioned uniform bottom surface and can colour-change not take place along with the angle of observation, its beautiful degree be general aluminium can't imagine.At this moment, as described in claim 5, oxide film with bronze colour system color, made the grey of filming, then becoming with any color can both be coordinated has the brown of sense of stability, and this especially is suitable as building materials and outer decorated articles.
The following describes one embodiment of the invention.
Schema in conjunction with the surface working of Fig. 1 is handled just carries out painted example to the extrusion process aluminium section bar as aluminium and describes.
At first, the extrusion process aluminium section bar is carried out pre-treatment.That is degreasing,, etch, neutralization (step n1, n2, n3).
Degreasing and neutralization can be undertaken by well-established law, but etch (step n2) is not because therefore the brush line that produces on the surface will remove extrusion molding the time, is to use common alkali (NaOH), but carries out with acid.As long as acid has certain solubleness, the brush line on aluminium surface can be removed and get final product, but be more preferably the acid fluorochemical of use.Acid fluorochemical can be removed the brush line on aluminium surface effectively owing to its dissolution characteristics, and, add additive and can make the aluminium surface more level and smooth.In addition, its advantage comprises that also metal and medicament loss are little, can handle at lesser temps, thereby can suppress heating cost etc.
Can use with acid ammonium fluoride to the aqueous solution of main component as etchant.In order to regulate the aluminium surface treatment state, this aqueous solution is the transparent liquid that contains sulfate ion, phosphate anion, borate ion better, and its composition is looked desirable treated state and adjusted.
Etch is carried out after degreasing, washing, and its condition is 3-10 minute for concentration 100-300g/L, temperature 20-60 ℃, etch time for example, can suitably set according to desirable treated state.By etch, aluminium section bar is produced does not have brush line, evenly level and smooth bottom surface.
After above-mentioned pre-treatment, the processing (step n4, n5, n6) of carrying out successively that anodic oxidation treatment, electrolytic coloring are handled and electrophoresis is filmed.
That is,, on the bottom surface, form anode oxide film, carry out electrolytic coloring then and handle (step n5), make above-mentioned anode oxide film painted by anodic oxidation treatment (step n4).
Make in order to be suitable as outer decorated articles aluminium become can with any color coordination sense of stability brown arranged the time, anode oxide film with bronze colour system color.For this reason, can in the aqueous solution that contains Ni etc., handle.Here said bronze colour system color is meant the index of expression color, and preferably the L value is 40.0-45.0, and a value is 2.0-3.0, and the b value is 10.0-13.0.
Also manage to make do with the color beyond brown.Also can not carry out electrolytic coloring and handle, form the white that contains pigment and film and film to handle by following electrophoresis.
At last, by the electrophoresis processing (step n6) of filming, on anode oxide film, form and film.Electrophoretic paint can be transparent or white, but above-mentioned during with brown colouration, can use the coating that contains the grey series pigments beyond the adularescent.The thickness of filming is looked thickness, color of electrophoretic paint, anode oxide film etc. and is different, but should be about 10-30 μ m, and the interaction between passing through to film with the anode oxide film of bronze colour system color and the grey above it can obtain brown outward appearance.If index that will brown expression color is set at about L value 30.0-40.0, a value 1.0-3.5, b value 3.0-7.0, the brown building materials and the outer decorated articles of being suitable for of generation then, can with any color coordination, lackluster, sense of stability is arranged.
That is, be the acid that contains fluorochemical owing to what in pretreated etch, use, therefore different during with use alkali etchant, can remove brush line.Thus, filming on the anode oxide film that is formed by anodic oxidation treatment by the back and this oxide film can make aluminium material surface be in good state.By above-mentioned film and film can make the light of reflection become stable, sense of stability is arranged, can obtain mirroring the good appearance of color.
In addition, make anode oxide film painted by electrolysis, form by electrophoresis again and film, then can demonstrate shades of colour by oxide film that overlaps each other and the color combination of filming, but this color shows owing to above-mentioned uniform bottom surface and can colour-change not take place along with the angle of observation, its beautiful degree be general aluminium can't imagine.At this moment, as mentioned above, oxide film with bronze colour system color, made the grey of filming, then becoming with any color can both be coordinated has the brown of sense of stability, thereby can obtain being best suited for the aluminium of building materials and outer decorated articles.
Fig. 1 is the schema of presentation surface manufacturing procedure.
Claims (5)
1. the method for surface finish of aluminium, described method is to carry out film forming anodic oxidation treatment after carrying out pre-treatment by etch, forms on film then and films, and it is characterized in that, uses the acid that contains fluorochemical to carry out above-mentioned etch.
2. aluminium, its surface processes with the method for claim 1.
3. aluminium, described aluminium form anode oxide film on the surface after carrying out pre-treatment by etch, form on oxide film then and film, and it is characterized in that, on above-mentioned surface, carry out above-mentioned etch with acid, remove brush line, form uniform bottom surface.
4. aluminium, described aluminium form anode oxide film on the surface after carrying out pre-treatment by etch, make this oxidation film coloring with electrolytic process after, on this film, form electrophoretic method and film, it is characterized in that, on above-mentioned surface, carry out above-mentioned etch with acid, remove brush line, form uniform bottom surface.
5. aluminium as claimed in claim 4, described aluminium is undertaken painted by electrolytic process, make above-mentioned oxide film bronze colour system color, then by the electrophoresis processing of filming, forms grey and films, and obtains brown outward appearance.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP289477/1999 | 1999-10-12 | ||
| JP28947799A JP2001107293A (en) | 1999-10-12 | 1999-10-12 | Surface working method for aluminum material and aluminum material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1307145A true CN1307145A (en) | 2001-08-08 |
Family
ID=17743791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00131754A Pending CN1307145A (en) | 1999-10-12 | 2000-10-11 | Aluminium material surface processing method and aluminium material |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2001107293A (en) |
| KR (1) | KR20010039922A (en) |
| CN (1) | CN1307145A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101509891B (en) * | 2009-04-01 | 2012-05-30 | 西南铝业（集团）有限责任公司 | Can cap material conversion film uniformity detecting method |
| CN109750337A (en) * | 2017-11-01 | 2019-05-14 | M-Tech株式会社 | Aluminum alloy materials and its manufacturing method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050034863A (en) * | 2003-10-10 | 2005-04-15 | 현대자동차주식회사 | Method of painting aluminum body |
| KR101029893B1 (en) * | 2010-09-24 | 2011-04-18 | 강인성 | Manufacturing method of aluminium panel |
-
1999
- 1999-10-12 JP JP28947799A patent/JP2001107293A/en active Pending
-
2000
- 2000-09-26 KR KR1020000056393A patent/KR20010039922A/en not_active Application Discontinuation
- 2000-10-11 CN CN00131754A patent/CN1307145A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101509891B (en) * | 2009-04-01 | 2012-05-30 | 西南铝业（集团）有限责任公司 | Can cap material conversion film uniformity detecting method |
| CN109750337A (en) * | 2017-11-01 | 2019-05-14 | M-Tech株式会社 | Aluminum alloy materials and its manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001107293A (en) | 2001-04-17 |
| KR20010039922A (en) | 2001-05-15 |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |