CN109881234A - A method of aluminium alloy is coloured by differential arc oxidation - Google Patents
A method of aluminium alloy is coloured by differential arc oxidation Download PDFInfo
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- CN109881234A CN109881234A CN201910304540.1A CN201910304540A CN109881234A CN 109881234 A CN109881234 A CN 109881234A CN 201910304540 A CN201910304540 A CN 201910304540A CN 109881234 A CN109881234 A CN 109881234A
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- arc oxidation
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Abstract
The invention discloses a kind of methods coloured by differential arc oxidation to aluminium alloy, first by Al alloy parts surface grinding and polishing on sand paper to be processed, and are cleaned and are dried with deionized water and ethyl alcohol；Then the Al alloy parts after pre-treatment are placed in electrolyte, and colorant is added in the electrolytic solution and carries out micro-arc oxidation treatment, obtain one layer of homogeneous black micro-arc oxidation ceramic layer on the Al alloy parts surface；Wherein, used electrolyte by 15~20g/L Na2B4O7.10H2The KOH of O and 5~10g/L is formed.The film layer that the above method is formed is finer and close, and ceramic layer adhesive force is strong, has very strong binding force with matrix.
Description
Technical field
The present invention relates to metal coloring technical field more particularly to a kind of aluminium alloy is coloured by differential arc oxidation
Method.
Background technique
Currently, black coating is because of its unique optical function and decoration in the process for treating surface of aluminium and Al-alloy products
Performance is with a wide range of applications in fields such as aerospace, optical instrument and electronic devices.
Alloy colouring technology in the prior art is mainly anodic oxidation, but anodic oxidation is in low voltage operating environment
The oxidation film layer of middle formation is loose, and coloring effect is unsatisfactory.
Summary of the invention
It is formed the object of the present invention is to provide a kind of method coloured by differential arc oxidation to aluminium alloy, this method
Film layer is finer and close, and ceramic layer adhesive force is strong, has very strong binding force with matrix.
The purpose of the present invention is what is be achieved through the following technical solutions:
A method of aluminium alloy is coloured by differential arc oxidation, which comprises
Step 1, by Al alloy parts surface grinding and polishing on sand paper to be processed, and cleaned with deionized water and ethyl alcohol
And it dries；
Al alloy parts after pre-treatment are placed in electrolyte by step 2, and it is micro- that colorant progress is added in the electrolytic solution
Arc oxidation processes obtain one layer of homogeneous black micro-arc oxidation ceramic layer on the Al alloy parts surface；
Wherein, used electrolyte by 15~20g/L Na2B4O7.10H2The KOH of O and 5~10g/L is formed；
The colorant being added includes the NH of the EDTA-2Na of 5~10g/L, 5~10g/L4VO3, 5~10g/L
Na2WO4, 5~10g/L KMnO4With the Cu (CH3COO) of 1~5g/L2。
During step 2 carries out micro-arc oxidation treatment, used parameter are as follows:
Electric current 3A~6A, 20~40min of frequency 500Hz~1000Hz, duty ratio 20~50% and time under constant current mode.
The Al alloy parts to be processed are 7005 aluminium alloys.
As seen from the above technical solution provided by the invention, the film layer that the above method is formed is finer and close, and ceramics
Layer adhesive force is strong, has very strong binding force with matrix.
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 the method flow schematic diagram provided in an embodiment of the present invention coloured by differential arc oxidation to aluminium alloy.
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 embodiment of the present invention is described in further detail below in conjunction with attached drawing, is implemented as shown in Figure 1 for the present invention
The method flow schematic diagram that aluminium alloy is coloured by differential arc oxidation that example provides, which comprises
Step 1, by Al alloy parts surface grinding and polishing on sand paper to be processed, and cleaned with deionized water and ethyl alcohol
And it dries；
In the step, the Al alloy parts to be processed are 7005 aluminium alloys, and specific size can for it is long × wide ×
Thickness is 20mm × 20mm × 3mm.
Al alloy parts after pre-treatment are placed in electrolyte by step 2, and it is micro- that colorant progress is added in the electrolytic solution
Arc oxidation processes obtain one layer of homogeneous black micro-arc oxidation ceramic layer on the Al alloy parts surface；
Wherein, used electrolyte by 15~20g/L Na2B4O7.10H2The KOH of O and 5~10g/L is formed；
The colorant being added includes the NH of the EDTA-2Na of 5~10g/L, 5~10g/L4VO3, 5~10g/L
Na2WO4, 5~10g/L KMnO4With the Cu (CH3COO) of 1~5g/L2。
In addition, during carrying out micro-arc oxidation treatment, used parameter are as follows:
Electric current 3A~6A, 20~40min of frequency 500Hz~1000Hz, duty ratio 20~50% and time under constant current mode.
Above-mentioned process is described in detail with specific example below:
First by the Al alloy parts surface of micro-arc oxidation treatment successively in the sand paper of 400#, 600#, 800# and 1200#
Upper polishing, and with polishing cloth polishing, then with deionized water and ethyl alcohol cleaned and dried；
Then workpiece after pre-treatment is placed in the Na by 19g/L2B4O7.10H2O, the EDTA- of KOH, 5g/L of 5.6g/L
The NH of 2Na, 10g/L4VO3, 10g/L Na2WO4, 10g/L KMnO4, 3g/L Cu (CH3COO)2In the electrolyte of composition, into
Row micro-arc oxidation treatment, to obtain one layer of homogeneous black micro-arc oxidation ceramic layer on Al alloy parts surface.
In specific operation process, power parameter is electric current 3A, frequency 500Hz and duty ratio 30% under constant current mode, processing
Time is 30min~60min.
It is worth noting that, the content being not described in detail in the embodiment of the present invention belongs to professional and technical personnel in the field's public affairs
The prior art known.
In conclusion the method for the embodiment of the present invention uses specific micro-arc oxidation process parameter, ontology is enabled aluminum alloy to
While differential arc oxidation generates ceramic membrane, the carbon in solution is black between aluminum alloy material surface and the interface of solution, passes through
The form of micelle reaches ceramic membrane pore interior with electrophoretic, the compound of black is directly generated in film layer hole, makes film
Layer has color in need, is the in-situ preparation on alloy matrix aluminum since differential arc oxidation generates black ceramic layer, determines this
Colored ceramic layer have well with the binding force of matrix.
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 (3)
1. a kind of method coloured by differential arc oxidation to aluminium alloy, which is characterized in that the described method includes:
Step 1, by Al alloy parts surface grinding and polishing on sand paper to be processed, and cleaned and dried with deionized water and ethyl alcohol
It is dry；
Al alloy parts after pre-treatment are placed in electrolyte by step 2, and colorant is added in the electrolytic solution and carries out differential of the arc oxygen
Change processing obtains one layer of homogeneous black micro-arc oxidation ceramic layer on the Al alloy parts surface；
Wherein, used electrolyte by 15~20g/L Na2B4O7.10H2The KOH of O and 5~10g/L is formed；
The colorant being added includes the NH of the EDTA-2Na of 5~10g/L, 5~10g/L4VO3, 5~10g/L Na2WO4, 5~
The KMnO of 10g/L4With the Cu (CH3COO) of 1~5g/L2。
2. the method coloured according to claim 1 by differential arc oxidation to aluminium alloy, which is characterized in that in step 2
During carrying out micro-arc oxidation treatment, used parameter are as follows:
Electric current 3A~6A, 20~40min of frequency 500Hz~1000Hz, duty ratio 20~50% and time under constant current mode.
3. the method coloured according to claim 1 by differential arc oxidation to aluminium alloy, which is characterized in that
The Al alloy parts to be processed are 7005 aluminium alloys.
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| CN201910304540.1A CN109881234A (en) | 2019-04-16 | 2019-04-16 | A method of aluminium alloy is coloured by differential arc oxidation |
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| CN201910304540.1A CN109881234A (en) | 2019-04-16 | 2019-04-16 | A method of aluminium alloy is coloured by differential arc oxidation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438546A (en) * | 2019-08-21 | 2019-11-12 | 大连理工大学 | A kind of electrolyte preparing hierarchical structure porous coating in titanium-alloy surface micro-arc oxidation |
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| CN102230205A (en) * | 2011-06-20 | 2011-11-02 | 华南理工大学 | Aluminum alloy micro-arc oxidation black ceramic membrane and preparation method thereof |
| CN102367584A (en) * | 2011-09-19 | 2012-03-07 | 北京科技大学 | Metal microarc oxidation electrolyte and method for forming black ceramic coating on metal surface by microarc oxidation |
| CN108754563A (en) * | 2018-06-14 | 2018-11-06 | 大连大学 | The 6063 aluminum alloy surface Al based on dipotassium tetraborate2O3-AlB12The preparation method of composite ceramics film layer |
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2019
- 2019-04-16 CN CN201910304540.1A patent/CN109881234A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102230205A (en) * | 2011-06-20 | 2011-11-02 | 华南理工大学 | Aluminum alloy micro-arc oxidation black ceramic membrane and preparation method thereof |
| CN102367584A (en) * | 2011-09-19 | 2012-03-07 | 北京科技大学 | Metal microarc oxidation electrolyte and method for forming black ceramic coating on metal surface by microarc oxidation |
| CN108754563A (en) * | 2018-06-14 | 2018-11-06 | 大连大学 | The 6063 aluminum alloy surface Al based on dipotassium tetraborate2O3-AlB12The preparation method of composite ceramics film layer |
Non-Patent Citations (1)
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| 田钦文: "微弧氧化制备黑色膜工艺、着色机制应用的研究现状与展望", 《材料保护》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438546A (en) * | 2019-08-21 | 2019-11-12 | 大连理工大学 | A kind of electrolyte preparing hierarchical structure porous coating in titanium-alloy surface micro-arc oxidation |
| WO2021031548A1 (en) * | 2019-08-21 | 2021-02-25 | 大连理工大学 | Electrolyte for preparing hierarchical structure porous coating on titanium alloy surface by micro-arc oxidation |
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Application publication date: 20190614 |