CN105543929B - Novel micro-arc oxidation electrolyte composite nanometer additive and its application - Google Patents
Novel micro-arc oxidation electrolyte composite nanometer additive and its application Download PDFInfo
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- CN105543929B CN105543929B CN201511006584.4A CN201511006584A CN105543929B CN 105543929 B CN105543929 B CN 105543929B CN 201511006584 A CN201511006584 A CN 201511006584A CN 105543929 B CN105543929 B CN 105543929B
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- arc oxidation
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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
Abstract
The invention discloses a kind of novel micro-arc oxidation electrolyte composite nanometer additive and its applications.The additive package that the present invention is formed using nano zine oxide and nano-titanium dioxide, adds it in the electrolyte using silicate as main film forming agent：1. good ceramic film can be generated, can be under the premise of generation Micro-Arc Oxidized Ceramic Coating thickness be high, the comprehensive performances such as hardness, wearability, corrosion resistance of film layer significantly improve, the surfacing of film layer, porosity and micro-crack are less, and Al matrixes, α Al are mainly contained in film layer2O3Phase, γ Al2O3Phase, Al3Ti and titanium zinc（Zn0.6Ti0.4）Phase；It is the energy conservation and environmental protection technique that a kind of neither consumption cathode does not consume electrolyte again 2. the preparation process of differential arc oxidation film layer is easy to operate；3. the differential arc oxidation film thickness that the present invention generates is not high, therefore film formation time is short, and consumption energy is low, can reduce production cost, has good economic benefit.
Description
Technical field
The present invention relates to materials science field, especially a kind of novel micro-arc oxidation electrolyte composite nanometer additive and its
Using.
Background technology
Aluminium and its alloy have many advantages, such as specific strength height, excellent electric conductivity, easy processing molding because of it, it has also become non-ferrous metal
The metal material that middle usage amount is maximum, application surface is most wide.However, the chemical property of aluminium is very active, oxygen can occur at normal temperatures
Change in one layer of natural oxide film of its Surface Creation, since film is very thin and hardness is low, be insufficiently resistant to rotten caused by adverse circumstances
Erosion and extraneous friction and caused by destruction, it is therefore necessary to it is surface-treated.Surface of the differential arc oxidation as a new generation
Treatment technology can generate one layer of fine and close alumina ceramic layer in aluminum alloy surface, so as to significantly improve aluminum alloy surface
Comprehensive performance.
Differential arc oxidization technique is a kind of directly in the novel surface treatment technology of metal surface growth in situ ceramic layer, because of it
It is environmentally protective, energy-efficient and with boundless development prospect.Have using the Micro-Arc Oxidized Ceramic Coating that the technology obtains
Have the features such as hardness is high, binding force is close, abrasiveness is low, corrosion-resistant, high temperature resistance impact, can largely meet high temperature or
Part requirements under the conditions of high-speed motion, therefore suitable for every field such as military project, machinery, electronics, automobile, space flight, aviations.
The study found that differential arc oxidation mainly concentrates the optimization of research electrical parameter and the adjustment of bath composition, and it is being electrolysed
The research that composite nanometer additive is added in liquid is few, less about the report of this respect both at home and abroad at present.Therefore, it researches and develops novel
Nanometer+nano combined additive is that have very much must to can further improve the comprehensive performance of Micro-Arc Oxidized Ceramic Layer of Aluminum Alloy
It wants.
Invention content
The purpose of the present invention is：A kind of novel micro-arc oxidation electrolyte composite nanometer additive and its application are provided, by this
Compound additive is added in basic electrolyte, can be significantly improved under conditions of Micro-Arc Oxidized Ceramic Coating thickness is not high
The corrosion resistance and mechanical property of Micro-Arc Oxidized Ceramic Coating, and do not pollute the environment.
The present invention is implemented：Novel micro-arc oxidation electrolyte composite nanometer additive, in parts by weight, packet
Include 1~5 part of nano zine oxide and 2~6 parts of nano-titanium dioxides；The composition of basic electrolyte be 10 parts of sodium metasilicate, 2 parts of wolframic acids
Sodium, 2 parts of sodium hydroxides and 2000 parts of distilled water.
The application of novel micro-arc oxidation electrolyte composite nanometer additive, calculates in parts by weight, and 2~5 parts are received
Rice titanium dioxide and 3~6 parts of nano-titanium dioxides are added in basic electrolyte, and the composition of basic electrolyte is 10 parts of silicic acid
Sodium, 2 parts of sodium tungstates, 2 parts of sodium hydroxides and 2000 parts of distilled water.
Compared with prior art, the additive package that the present invention is formed using nano zine oxide and nano-titanium dioxide, will
It is added in the electrolyte using silicate as main film forming agent：1. good ceramic film can be generated, it can be in generation differential of the arc oxygen
Under the premise of change ceramic film thickness is not high, the comprehensive performances such as hardness, wearability, corrosion resistance of film layer significantly improve, film layer
Surfacing, porosity and micro-crack are less, and Al matrixes, α-Al are mainly contained in film layer2O3Phase, γ-Al2O3Phase, Al3Ti and
Titanium zinc（Zn0.6Ti0.4）Phase；It is that a kind of neither consumption cathode does not consume again 2. the preparation process of differential arc oxidation film layer is easy to operate
The energy conservation and environmental protection technique of electrolyte；3. the differential arc oxidation film thickness that the present invention generates is not high, therefore film formation time is short, consumption
Energy is low, can reduce production cost, has good economic benefit.
Description of the drawings
Attached drawing 1 is the surface structure of ceramic membrane prepared by basic electrolyte；
The surface structure for the ceramic membrane that attached drawing 2 is prepared for embodiment 1；
The surface structure for the ceramic membrane that attached drawing 3 is prepared for embodiment 2；
Attached drawing 4 prepares the relational graph of ceramic membrane friction coefficient and fraction time for different additive.
Specific embodiment
The embodiment of the present invention 1：Novel micro-arc oxidation electrolyte composite nanometer additive, differential arc oxidation basic electrolyte are
Sodium metasilicate electrolyte, including 10g/L sodium metasilicate, 2g/L sodium tungstates, 2g/L sodium hydroxides and 2L distilled water；Into basic electrolyte
Novel micro-arc oxidation electrolyte composite nanometer additive is added in, the concentration point of nano zine oxide and nano-titanium dioxide after addition
It Wei not 2g/L and 4g/L.
Differential arc oxidation step：
Differential arc oxidation processing procedure uses constant voltage mode, using sample as anode, using stainless steel electrolytic slot as cathode.It will examination
Sample drills and is inserted into aluminum conductor connection, and hang in the electrolyte being configured, and sample bottom is not contacted with oxidation trough.Then it connects
Energization source sets scheduled technological parameter（Electrical parameter is set as：Time 60min；Frequency 400Hz；Voltage 600V；Duty ratio
30%）, job key button is pressed, proceeds by differential arc oxidation experiment.Pass through circulating water cooling system in differential arc oxidation processing procedure
Electrolyte is cooled down with air pump system, keeps electrolyte temperature at 35 DEG C or so.After treating specimen reaction, power supply is closed, is taken out
Sample is simultaneously cleaned with distilled water, dried.
To the thickness of ceramic coating formed by micro-arc oxidation made from above-mentioned technique, hardness, surface roughness, corrosion resistance, wearability inspection
It tests analysis result and is shown in Table 1, surface topography is as shown in Figure 2.
The embodiment of the present invention 2：Novel micro-arc oxidation electrolyte composite nanometer additive, differential arc oxidation basic electrolyte are
Sodium metasilicate electrolyte, including 10g/L sodium metasilicate, 2g/L sodium tungstates, 2g/L sodium hydroxides and 2L distilled water；Into basic electrolyte
Novel micro-arc oxidation electrolyte composite nanometer additive is added in, the concentration point of nano zine oxide and nano-titanium dioxide after addition
It Wei not 1g/L and 3g/L.
Differential arc oxidation step is the same as embodiment 1.And to the thickness of ceramic coating formed by micro-arc oxidation, hardness, surface made from the technique
Roughness, corrosion resistance, wearability check analysis the results are shown in Table 1, and surface topography is as shown in Figure 3.
By to adding the ceramic film progressive obtained by novel composite nano additive in embodiment 1 and embodiment 2
It can detect, further to verify the experiment effect of the present invention, and with not adding in film made of the basic electrolyte of any additive
Layer compares, and the results are shown in Table 1：
According to above-mentioned experiment it is found that the present invention is using identical equipment and same basic electrolyte system, and without reaching
Under conditions of higher thicknesses of layers, the hardness, wearability and corrosion resistance of differential arc oxidation film layer are remarkably improved, to a certain degree
On can reduce energy expenditure in micro-arc oxidation process；Film surface microscopic appearance is compared by observation, it can be seen that addition
After composite nanometer additive, film layer crackle, porosity, spurting deposit are reduced, and the surface of film layer is more smooth.
Claims (2)
1. a kind of novel micro-arc oxidation electrolyte, it is characterised in that：In parts by weight, including 1~5 part of nano zine oxide and
2~6 parts of nano-titanium dioxides；The composition of basic electrolyte is 10 parts of sodium metasilicate, 2 parts of sodium tungstates, 2 parts of sodium hydroxides and 2000 parts
Distilled water.
2. a kind of application of novel micro-arc oxidation electrolyte as described in claim 1, it is characterised in that：In parts by weight
It calculates, 1~5 part of nano zine oxide and 2~6 parts of nano-titanium dioxides is added in basic electrolyte, the group of basic electrolyte
As 10 parts of sodium metasilicate, 2 parts of sodium tungstates, 2 parts of sodium hydroxides and 2000 parts of distilled water.
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| CN201511006584.4A CN105543929B (en) | 2015-12-29 | 2015-12-29 | Novel micro-arc oxidation electrolyte composite nanometer additive and its application |
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| CN105543929B true CN105543929B (en) | 2018-07-03 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108385150A (en) * | 2018-03-05 | 2018-08-10 | 中国人民解放军陆军装甲兵学院 | A kind of laminated film and preparation method thereof |
| CN108277516B (en) * | 2018-04-13 | 2022-09-27 | 中国人民解放军陆军装甲兵学院 | Micro-arc oxidation electrolyte and preparation method of micro-arc oxidation film |
| CN109487323B (en) * | 2018-12-20 | 2020-12-11 | 大连理工大学 | Electrolyte for preparing porous membrane containing bioactive elements on titanium metal surface by micro-arc oxidation |
| CN110965108A (en) * | 2019-12-27 | 2020-04-07 | 沈兰兰 | Zn-TiO2Method for producing a coating |
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