CN110004476A - A method of black ceramic layer is prepared in aluminum alloy surface - Google Patents
A method of black ceramic layer is prepared in aluminum alloy surface Download PDFInfo
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- CN110004476A CN110004476A CN201910304433.9A CN201910304433A CN110004476A CN 110004476 A CN110004476 A CN 110004476A CN 201910304433 A CN201910304433 A CN 201910304433A CN 110004476 A CN110004476 A CN 110004476A
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- ceramic layer
- aluminum alloy
- black ceramic
- alloy parts
- layer
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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
- C25D11/026—Anodisation with spark discharge
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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
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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)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention discloses a kind of methods for preparing black ceramic layer in aluminum alloy surface, 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；The Al alloy parts after pre-treatment are placed in electrolyte again, 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.The above method can directly generate black compounds in film layer hole, and film layer is made to have color in need, and make the colored ceramic layer have well with the binding force of matrix.
Description
Technical field
The present invention relates to metallochromy technical field more particularly to a kind of sides that black ceramic layer is prepared in aluminum alloy surface
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
The object of the present invention is to provide a kind of method for preparing black ceramic layer in aluminum alloy surface, this method can be in film layer
Black compounds are directly generated in hole, and film layer is made to have color in need.
The purpose of the present invention is what is be achieved through the following technical solutions:
A method of black ceramic layer is prepared in aluminum alloy surface, 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.
In step 2, the electrolyte specifically includes: the KOH of 2~5g/L, 2~5g/LNaF, 5~10g/L
Na2SiO3, 1~5g/L Na2WO4With 1~5g/L sodium citrate.
In step 2, the colorant being added is the carbon Heisui River solution of 15~20mL/L.
In step 2, during carrying out micro-arc oxidation treatment, the parameter of use are as follows:
Voltage 450V~500V, frequency 500Hz~1000Hz, duty ratio 20~50% and time 20 under constant voltage mode~
40min。
The Al alloy parts to be processed are LY-12 aluminium alloy.
As seen from the above technical solution provided by the invention, the above method can directly generate black in film layer hole
Compound makes film layer have color in need, and make the colored ceramic layer have well with the binding force of 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 that black ceramic layer is prepared in aluminum alloy surface；
Fig. 2 is the workpiece EDS figure for preparing black film layer in example of the present invention on 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
What example provided prepares the method flow schematic diagram of black ceramic layer in aluminum alloy surface, 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 LY-12 aluminium alloy.
And the size length × width x thickness of the Al alloy parts can be 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.
In this step, the electrolyte specifically includes: the KOH of 2~5g/L, 2~5g/LNaF, 5~10g/L
Na2SiO3, 1~5g/L Na2WO4With 1~5g/L sodium citrate.
The colorant being added is the carbon Heisui River solution of 15~20mL/L.
In addition, used parameter can be with during step 2 carries out micro-arc oxidation treatment are as follows:
Voltage 450V~500V, frequency 500Hz~1000Hz, duty ratio 20~50% and time 20 under constant voltage mode~
40min。
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 of KOH by 2g/L, 2g/L NaF, 6g/L2SiO3、2g/LNa2WO4、
0.5g/L sodium citrate, 20mL/L carbon Heisui River solution electrolyte in, carry out micro-arc oxidation treatment, thus in aluminium alloy work
Part surface obtain one layer of homogeneous black micro-arc oxidation ceramic layer, power parameter be constant voltage mode under voltage 500V, frequency 600Hz and
Duty ratio 20%, processing time are 30min.
It is illustrated in figure 2 the workpiece EDS figure for preparing black film layer in example of the present invention on aluminium alloy, it can by Fig. 2
Know: C element derives from atmosphere on a small quantity, and most for the aqueous solution black derived from carbon, F element derives from NaF stabilizer, W
Element derives from WO4 2-Ion, C element and W element are the essential elements for generating black ceramic layer.
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 (5)
1. a kind of method for preparing black ceramic layer in aluminum alloy surface, 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.
2. the method for preparing black ceramic layer in aluminum alloy surface according to claim 1, which is characterized in that in step 2,
The electrolyte specifically includes: the Na of the KOH of 2~5g/L, 2~5g/LNaF, 5~10g/L2SiO3, 1~5g/L Na2WO4
With 1~5g/L sodium citrate.
3. the method for preparing black ceramic layer in aluminum alloy surface according to claim 1, which is characterized in that in step 2,
The colorant being added is the carbon Heisui River solution of 15~20mL/L.
4. the method for preparing black ceramic layer in aluminum alloy surface according to claim 1, which is characterized in that in step 2,
During carrying out micro-arc oxidation treatment, the parameter of use are as follows:
Voltage 450V~500V, 20~40min of frequency 500Hz~1000Hz, duty ratio 20~50% and time under constant voltage mode.
5. the method for preparing black ceramic layer in aluminum alloy surface according to claim 1, which is characterized in that
The Al alloy parts to be processed are LY-12 aluminium alloy.
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| CN201910304433.9A CN110004476A (en) | 2019-04-16 | 2019-04-16 | A method of black ceramic layer is prepared in aluminum alloy surface |
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| CN201910304433.9A CN110004476A (en) | 2019-04-16 | 2019-04-16 | A method of black ceramic layer is prepared in aluminum alloy surface |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154673A (en) * | 2011-04-12 | 2011-08-17 | 中国船舶重工集团公司第十二研究所 | Method for preparing environment-friendly micro-arc oxidation black ceramic film on aluminum alloy surface |
| 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 |
| CN104562147A (en) * | 2014-12-22 | 2015-04-29 | 北京石油化工学院 | Method for preparing carbon-containing micro-arc oxidation ceramic layer |
| CN107964673A (en) * | 2016-10-19 | 2018-04-27 | 宁波瑞隆表面技术有限公司 | A kind of method that aluminum alloy differential arc oxidation prepares black ceramic film layer |
-
2019
- 2019-04-16 CN CN201910304433.9A patent/CN110004476A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154673A (en) * | 2011-04-12 | 2011-08-17 | 中国船舶重工集团公司第十二研究所 | Method for preparing environment-friendly micro-arc oxidation black ceramic film on aluminum alloy surface |
| 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 |
| CN104562147A (en) * | 2014-12-22 | 2015-04-29 | 北京石油化工学院 | Method for preparing carbon-containing micro-arc oxidation ceramic layer |
| CN107964673A (en) * | 2016-10-19 | 2018-04-27 | 宁波瑞隆表面技术有限公司 | A kind of method that aluminum alloy differential arc oxidation prepares black ceramic film layer |
Non-Patent Citations (2)
| Title |
|---|
| XUEFENG LIU等: "Preliminary Study on Preparation of Black Ceramic Coating Formed on Magnesium Alloy by Micro-arc Oxidation in Carbon Black Pigment-contained Electrolyte", 《 PROCEDIA ENGINEERING》 * |
| 田钦文等: "微弧氧化制备黑色膜工艺、着色机制及应用的研究现状与展望", 《材料保护》 * |
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Application publication date: 20190712 |