CN110129857A - A method of crocus oxidation film is prepared in 7A04 aluminum alloy surface - Google Patents
A method of crocus oxidation film is prepared in 7A04 aluminum alloy surface Download PDFInfo
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- CN110129857A CN110129857A CN201910510853.2A CN201910510853A CN110129857A CN 110129857 A CN110129857 A CN 110129857A CN 201910510853 A CN201910510853 A CN 201910510853A CN 110129857 A CN110129857 A CN 110129857A
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- alloy parts
- crocus
- oxidation 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
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
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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
- C25D11/12—Anodising more than once, e.g. in different baths
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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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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention discloses a kind of methods in 7A04 aluminum alloy surface preparation crocus oxidation film, by Al alloy parts surface grinding and polishing on sand paper to be processed, and are cleaned and are dried, so that clean Al alloy parts be made；By the clean Al alloy parts at 60 DEG C 50~80s of alkali cleaning, then 20~40s of pickling at normal temperature, then cleaned and dried with deionized water and dehydrated alcohol, so that the Al alloy parts after pre-treatment be made；Al alloy parts after the pre-treatment are placed in electrolyte and carry out once electrolytic, the anode oxide film of one layer of homogeneous transparent is made on the Al alloy parts surface；Al alloy parts after the once electrolytic are placed in coloring liquid and carry out re-electrolysis, so that one layer of uniform crocus oxidation film be made on the Al alloy parts surface.Film layer prepared by the present invention is finer and close, and colour retention, weatherability and light resistance are good, long service life, and processing technology is simple, and power consumption of polymer processing is low.
Description
Technical field
The present invention relates to alloy colouring technical fields, more particularly to one kind to prepare crocus oxygen in 7A04 aluminum alloy surface
Change the method for film.
Background technique
Currently, in the surface dye technology of aluminium and Al-alloy products, crocus film layer because of its unique optical function and
Decorative performance is used widely in fields such as navigation, optical instrument, building decoration materials.
In the prior art, the oxidation film of alloy colouring has dyeing film, integral colouring film etc., and dyeing film weatherability and
Light resistance is poor, and service life is short, and integral colouring film processing technology is complicated, and power consumption of polymer processing is high.
Summary of the invention
For above-mentioned shortcoming in the prior art, the present invention provides one kind prepared in 7A04 aluminum alloy surface it is orange
The method of color oxidation film, prepared film layer is finer and close, and colour retention, weatherability and light resistance are good, long service life, and
Processing technology is simple, and power consumption of polymer processing is low.
The purpose of the present invention is what is be achieved through the following technical solutions:
A method of crocus oxidation film is prepared in 7A04 aluminum alloy surface, comprising:
Step 1, by 7A04 Al alloy parts surface grinding and polishing on sand paper to be processed, and cleaned and dried, thus
Clean Al alloy parts are made；
Step 2, by the clean Al alloy parts at 60 DEG C 50~80s of alkali cleaning, then at normal temperature pickling 20~
40s, then cleaned and dried with deionized water and dehydrated alcohol, so that the Al alloy parts after pre-treatment be made；
Al alloy parts after the pre-treatment are placed in electrolyte and carry out once electrolytic by step 3, in the aluminium alloy
The anode oxide film of one layer of homogeneous transparent is made in workpiece surface, so that the Al alloy parts after once electrolytic be made；
Al alloy parts after the once electrolytic are placed in coloring liquid and carry out re-electrolysis by step 4, thus described
One layer of uniform crocus oxidation film is made in Al alloy parts surface；Wherein, the coloring liquid includes the H of 15~25g/L2SO4
With the KMnO of 5~10g/L4。
Preferably, re-electrolysis using the Al alloy parts after the once electrolytic as anode, graphite plate as cathode,
Used parameter includes: that voltage is 6~9V, electrolysis time is 30~60s under room temperature constant voltage mode.
Preferably, the electrolyte includes the H of 140~180g/L2SO4。
Preferably, once electrolytic is using the Al alloy parts after the pre-treatment as anode, and graphite plate is as cathode, institute
The parameter of use includes: 14~18V of voltage under room temperature constant voltage mode, and electrolysis time is 20~40min.
Preferably, the used solution of alkali cleaning is the NaOH of 10wt%, and the used solution of pickling is the HNO of 10wt%3。
As seen from the above technical solution provided by the invention, provided by the present invention to be prepared in 7A04 aluminum alloy surface
The method of crocus oxidation film uses specific electrolytic colouring technology parameter, is with the transparent anode oxidation film of sulfuric acid once electrolytic
Basis carries out DC electrolysis coloring using constant current mode in the coloring liquid of metalline, and metal ion is in anode oxide film
Precipitating metal is restored in micropore, makes film layer that there is the color of crocus, and it is finer and close to be formed by film layer, it is colour retention, resistance to
Hou Xing, light resistance and service life are better than dyeing film very much, and processing energy consumption is lower than integral colouring film again.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is to prepare the process signal of the method for crocus oxidation film in 7A04 aluminum alloy surface in the embodiment of the present invention
Figure.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on this
The embodiment of invention, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, belongs to protection scope of the present invention.
The method provided by the present invention in 7A04 aluminum alloy surface preparation crocus oxidation film is retouched in detail below
It states.The content being not described in detail in the embodiment of the present invention belongs to the prior art well known to professional and technical personnel in the field.
As shown in Figure 1, a kind of method in 7A04 aluminum alloy surface preparation crocus oxidation film, includes the following steps:
Step 1, by 7A04 Al alloy parts surface grinding and polishing on sand paper to be processed, and with deionized water and dehydrated alcohol
It is cleaned, is then dried, so that clean Al alloy parts be made.
Step 2, by the clean Al alloy parts at 60 DEG C 50~80s of alkali cleaning, then at normal temperature pickling 20~
40s, then cleaned and dried with deionized water and dehydrated alcohol, so that the Al alloy parts after pre-treatment be made.
Al alloy parts after the pre-treatment are placed in electrolyte and carry out once electrolytic by step 3, in the aluminium alloy
The anode oxide film of one layer of homogeneous transparent is made in workpiece surface, so that the Al alloy parts after once electrolytic be made.
Al alloy parts after the once electrolytic are placed in coloring liquid and carry out re-electrolysis by step 4, thus described
One layer of uniform crocus oxidation film is made in Al alloy parts surface.
Specifically, should may include following embodiments in the method for 7A04 aluminum alloy surface preparation crocus oxidation film:
(1) size of 7A04 Al alloy parts to be processed can be with are as follows: radius 20mm, with a thickness of 5mm.
(2) the used solution of alkali cleaning is the NaOH of 10wt%, and the used solution of pickling is the HNO of 10wt%3。
(3) electrolyte is mainly by the H of 140~180g/L2SO4Composition.Once electrolytic uses the aluminium alloy after the pre-treatment
Workpiece uses power supply for DC current regulator power supply as anode, graphite plate as cathode, and used parameter includes: room temperature
14~18V of voltage under constant voltage mode, electrolysis time are 20~40min.
(4) coloring liquid described in includes the H of 15~25g/L2SO4With the KMnO of 5~10g/L4.Described in re-electrolysis uses
As anode, graphite plate uses power supply for DC current regulator power supply, is adopted Al alloy parts after once electrolytic as cathode
Parameter includes: that voltage is 6~9V, electrolysis time is 30~60s under room temperature constant voltage mode.
Further, the method provided by the present invention in 7A04 aluminum alloy surface preparation crocus oxidation film is using specific
Electrolytic colouring technology parameter, based on the transparent anode oxidation film of sulfuric acid once electrolytic, in the coloring liquid of metalline
DC electrolysis coloring is carried out using constant current mode, metal ion restores precipitating metal in the micropore of anode oxide film, makes film layer
Color with crocus, and it is formed by that film layer is finer and close, and colour retention, weatherability, light resistance and service life compare
Dyeing film is good very much, and energy consumption is lower than integral colouring film again.
To sum up, film layer prepared by the embodiment of the present invention is finer and close, and colour retention, weatherability and light resistance are good,
Long service life, and processing technology is simple, and power consumption of polymer processing is low.
In order to more clearly from show technical solution provided by the present invention and generated technical effect, below with tool
The method provided by the present invention in 7A04 aluminum alloy surface preparation crocus oxidation film is described in detail in body embodiment.
Embodiment 1
A method of crocus oxidation film being prepared in 7A04 aluminum alloy surface, is included the following steps:
Step A1, by 7A04 Al alloy parts surface to be processed successively in the sand paper of 400#, 600#, 800# and 1200#
Upper polishing, and with cloth polishing is polished, it is then cleaned with deionized water and dehydrated alcohol, and dry, to be made clean
Al alloy parts.
Step A2, by the clean Al alloy parts at 60 DEG C alkali cleaning 60s, then pickling 30s at normal temperature, then use
Deionized water and dehydrated alcohol are cleaned and are dried, so that the Al alloy parts after pre-treatment be made.
Step A3, the Al alloy parts after the pre-treatment are placed in the H by 160g/L2SO4It is carried out in the electrolyte of composition
Once electrolytic, once electrolytic use the Al alloy parts after the pre-treatment as anode, and graphite plate is as cathode, using power supply
For DC current regulator power supply, used parameter includes: voltage 16V under room temperature constant voltage mode, electrolysis time 30min, from
And the anode oxide film of one layer of homogeneous transparent is made on the Al alloy parts surface.
Step A4, the Al alloy parts after once electrolytic are placed in the H by 15g/L2SO4With the KMnO of 10g/L4Composition
Re-electrolysis is carried out in coloring liquid, using the Al alloy parts after the once electrolytic as anode, graphite plate is made for re-electrolysis
For cathode, use power supply for DC current regulator power supply, used parameter include: under room temperature constant voltage mode voltage be 8V, electricity
The solution time is 50s, so that one layer of uniform crocus oxidation film be made on the Al alloy parts surface.
To sum up, film layer prepared by the embodiment of the present invention is finer and close, and colour retention, weatherability and light resistance are good,
Long service life, and processing technology is simple, and power consumption of polymer processing is low.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Within the technical scope of the present disclosure, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (5)
1. a kind of method in 7A04 aluminum alloy surface preparation crocus oxidation film characterized by comprising
Step 1, by 7A04 Al alloy parts surface grinding and polishing on sand paper to be processed, and cleaned and dried, to be made
Clean Al alloy parts；
Step 2, by the clean Al alloy parts at 60 DEG C 50~80s of alkali cleaning, then 20~40s of pickling at normal temperature,
It is cleaned and is dried with deionized water and dehydrated alcohol again, so that the Al alloy parts after pre-treatment be made；
Al alloy parts after the pre-treatment are placed in electrolyte and carry out once electrolytic by step 3, in the Al alloy parts
The anode oxide film of one layer of homogeneous transparent is made in surface, so that the Al alloy parts after once electrolytic be made；
Al alloy parts after the once electrolytic are placed in coloring liquid and carry out re-electrolysis by step 4, to close in the aluminium
One layer of uniform crocus oxidation film is made in golden workpiece surface；
Wherein, the coloring liquid includes the H of 15~25g/L2SO4With the KMnO of 5~10g/L4。
2. the method according to claim 1 in 7A04 aluminum alloy surface preparation crocus oxidation film, which is characterized in that two
Using the Al alloy parts after the once electrolytic as anode, graphite plate includes: as cathode, used parameter for secondary electrolysis
Voltage is 6~9V under room temperature constant voltage mode, electrolysis time is 30~60s.
3. the method according to claim 1 or 2 in 7A04 aluminum alloy surface preparation crocus oxidation film, feature exist
In the electrolyte includes the H of 140~180g/L2SO4。
4. the method according to claim 1 or 2 in 7A04 aluminum alloy surface preparation crocus oxidation film, feature exist
In once electrolytic uses the Al alloy parts after the pre-treatment as anode, and graphite plate is as cathode, used parameter packet
Include: 14~18V of voltage under room temperature constant voltage mode, electrolysis time are 20~40min.
5. the method according to claim 1 or 2 in 7A04 aluminum alloy surface preparation crocus oxidation film, feature exist
In the used solution of alkali cleaning is the NaOH of 10wt%, and the used solution of pickling is the HNO of 10wt%3。
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| CN201910510853.2A CN110129857A (en) | 2019-06-13 | 2019-06-13 | A method of crocus oxidation film is prepared in 7A04 aluminum alloy surface |
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| CN201910510853.2A CN110129857A (en) | 2019-06-13 | 2019-06-13 | A method of crocus oxidation film is prepared in 7A04 aluminum alloy surface |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1594668A (en) * | 2004-07-15 | 2005-03-16 | 张秋声 | Imitation gold electrolytic coloring agent for aluminium and aluminium alloy products |
| CN1873059A (en) * | 2006-05-01 | 2006-12-06 | 燕山大学 | One-step method for making colour oxide film on surface of aluminium and aluminum alloy |
| CN101503813A (en) * | 2008-12-26 | 2009-08-12 | 苏州市万泰真空炉研究所有限公司 | Process for dyeing aluminum oxidation material |
| CN103741191A (en) * | 2013-11-07 | 2014-04-23 | 北京星航机电装备有限公司 | Aluminum alloy anode oxidation film layer preparation method |
-
2019
- 2019-06-13 CN CN201910510853.2A patent/CN110129857A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1594668A (en) * | 2004-07-15 | 2005-03-16 | 张秋声 | Imitation gold electrolytic coloring agent for aluminium and aluminium alloy products |
| CN1873059A (en) * | 2006-05-01 | 2006-12-06 | 燕山大学 | One-step method for making colour oxide film on surface of aluminium and aluminum alloy |
| CN101503813A (en) * | 2008-12-26 | 2009-08-12 | 苏州市万泰真空炉研究所有限公司 | Process for dyeing aluminum oxidation material |
| CN103741191A (en) * | 2013-11-07 | 2014-04-23 | 北京星航机电装备有限公司 | Aluminum alloy anode oxidation film layer preparation method |
Non-Patent Citations (3)
| Title |
|---|
| 张允诚 等: "《电镀手册》", 31 January 2007, 国防工业出版社 * |
| 李海娟 等: "泡沫铝表面处理电解着金黄色试验研究", 《太原重型机械学院学报》 * |
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