CN108468075A - A kind of electrolyte and its application process of differential arc oxidation self-lubricating composite ceramic coating - Google Patents
A kind of electrolyte and its application process of differential arc oxidation self-lubricating composite ceramic coating Download PDFInfo
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- CN108468075A CN108468075A CN201810259342.3A CN201810259342A CN108468075A CN 108468075 A CN108468075 A CN 108468075A CN 201810259342 A CN201810259342 A CN 201810259342A CN 108468075 A CN108468075 A CN 108468075A
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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
- C25D11/026—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
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
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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
- C25D11/26—Anodisation of refractory metals or alloys based thereon
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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
- C25D11/30—Anodisation of magnesium or alloys based thereon
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Abstract
The present invention discloses a kind of electrolyte and its application process of differential arc oxidation self-lubricating composite ceramic coating.Electrolyte of the present invention includes common micro-arc oxidation electrolyte, nanometer additive, micron order MoS2Powder.Its application process, substrate are to common are non-ferrous metal and its alloy, specifically：Nanometer additive, micron order MoS is added in common micro-arc oxidation electrolyte2Powder is prepared using constant current mode, and current density is 3 15A/dm2, the differential arc oxidation time is 30 60 minutes.The present invention by being added the micron order MoS with self-lubricating function in the electrolytic solution2Powder body material, on the one hand, the pore size for the coating that micron particles size is prepared with differential arc oxidation matches, and is conducive to give full play to MoS2The lubricant effect of powder body material；On the other hand, these micropores can store MoS2, to further improve the friction and wear behavior of composite ceramic coat.
Description
Technical field
The invention belongs to technical field of micro-arc oxidization, are related to a kind of composite ceramics preparing self-lubricating in non-ferrous metal surface
The electrolyte and its application process of coating.
Background technology
Differential arc oxidization technique, which is one kind, directly growing pottery in the non ferrous metal and their alloys surface in situ such as aluminium, magnesium, titanium
The new technology of porcelain coating.The arc differential oxide ceramic coating prepared in aluminum alloy surface using the technology is firmly combined with matrix, tool
There are the excellent properties such as good wear-resisting, corrosion-resistant, high temperature impact resistance, thus in aerospace, machinery, electronics, weaving, decoration etc.
Field has broad application prospects.However, alumina ceramic coating prepared by differential arc oxidation has porous structure, it is this poroid
Structure makes coating hardness be unevenly distributed, to further affect its friction and wear behavior.
In order to solve this problem,《Improvement of structural and mechanical properties
of alumina coatings by incorporation of TiO2andɑ-Al2O3nanoadditives》It proposes in the differential of the arc
Al is added in oxidation electrolyte2O3And TiO2Nano-powder fills cavernous structure, obtains fine and close, uniform nano ceramics and applies
Layer, the nano ceramic coat that the hardness distribution of coating is enhanced when being also relatively not added with nano-powder, but prepares
Friction and wear behavior is not significantly improved.《Improvement of surface porosity and
properties of alumina films by incorporation of Fe micrograins in micro-arc
oxidation》Micron order Fe particles are added to fill the micropore of coating in proposition in the electrolytic solution, are prepared for the pottery of uniform high hardness
Porcelain coating, but compared to the ceramic coating for not adding Fe particles, the friction coefficient that the coating of micron order Fe particles is added only is omited
It shades small.《Effects of addition of Al(NO3)3to electrolytes on alumina coatings by
plasma electrolytic oxidation》It is proposed the Al (NO that various concentration is added in micro-arc oxidation electrolyte3)3, lead to
Cross increase Al (NO3)3Concentration can improve the microhardness of coating.《Effect of additives on structure
and corrosion resistance of ceramic coatings on Mg–Li alloy by micro-arc
oxidation》Na is added in proposition in the electrolytic solution2B4O7And EDTA, thus it is possible to vary the surface topography of coating.《Effects of
Current Density on the Microstructure and the Corrosion Resistance of Alumina
Coatings Embedded with SiC Nano-particles Produced by Micro-arc Oxidation》It carries
Go out that SiC nano particles are added in the electrolytic solution to improve the corrosion resistance of coating.
In order to further improve the friction and wear behavior of nano ceramic coat, on the basis of above-mentioned electrolyte, the present invention
Further it is added to the micron order MoS with self-lubricating function2Powder body material：On the one hand, micron particles size and differential of the arc oxygen
The pore size for changing the coating prepared matches, and is conducive to give full play to MoS2The lubricant effect of powder body material, on the other hand, this
Hole can store MoS slightly2, to further improve the friction and wear behavior of composite ceramic coat.
Invention content
It is an object of the invention in view of the deficiencies of the prior art, provide a kind of differential arc oxidation self-lubricating composite ceramic
The electrolyte of coating, the composite ceramic coat is uniform, fine and close, has preferable antifriction effect.
The technical solution adopted for solving the technical problem of the present invention is：
A kind of electrolyte of differential arc oxidation self-lubricating composite ceramic coating, including common micro-arc oxidation electrolyte, nanometer add
Add agent, micron order MoS2Powder；
The common micro-arc oxidation electrolyte is silicate, borate or aluminate；Wherein silicate electrolyte is by 1g/
l KOH、10g/l Na2SiO3Composition.
The nanometer additive is Al2O3Or TiO2Nano-powder；Size is 20-50nm, a concentration of 0.5-4g/l；
The micron order MoS2Greatly 0.8-1.2 μm, concentration range 0.5-7g/l of the size of powder granule, preferably
1-5g/l, more preferably 2-4g/l.Concentration is too small, MoS2Incorporation it is limited, improve that friction effect is not apparent enough, and concentration is too
When big, due to MoS2Hardness itself is very low, and excessive incorporation can influence whole wear-resisting property.
It is a further object to provide the application process of above-mentioned electrolyte, substrate be common are non-ferrous metal and its
Alloy (can be aluminium, magnesium, titanium etc.), specifically：
Nanometer additive, micron order MoS is added in common micro-arc oxidation electrolyte2Powder is prepared using constant current mode,
Current density is 3-15A/dm2, the differential arc oxidation time is 30-60 minutes, obtains required differential arc oxidation self-lubricating composite ceramic
Coating.
The beneficial effects of the invention are as follows：
The present invention by being added the micron order MoS with self-lubricating function in the electrolytic solution2Powder body material, on the one hand, micro-
The pore size for the coating that scale particles size is prepared with differential arc oxidation matches, and is conducive to give full play to MoS2Powder body material
Lubricant effect；On the other hand, these micropores can store MoS2, to further improve the friction and abrasion of composite ceramic coat
Energy.
Description of the drawings
Fig. 1 is the micron order MoS for being added to various concentration2The scanning electron microscope of the composite ceramic coat prepared after powder is shone
Piece, (a) 0g/l, (b) 1g/l, (c) 3g/l, (d) 5g/l, (e) 7g/l；
Fig. 2 is to be added to different amounts of micron order MoS2The fretting wear curve of the composite ceramic coat prepared after powder
Figure.
Specific implementation mode
Below according to specific embodiment, the present invention will be described in detail, and the objects and effects of the present invention will be more apparent.
Embodiment 1
Using 1g/l KOH, 10g/l Na2SiO3The silicate electrolyte of composition, in the electrolytic solution be added size be 20~
The Al of 50nm2O3Nano-powder, a concentration of 0.5g/l, is prepared using constant current mode, current density 4.5A/dm2, differential arc oxidation
Time is 60 minutes.The micron order MoS of various concentration is added as needed in above-mentioned electrolyte2Powder, concentration range be 0~
7g/l prepares composite ceramic coat as electrolyte.
Fig. 1 is to be added to different amounts of micron order MoS2The stereoscan photograph of the composite ceramic coat prepared after powder,
(a)0g/l,(b)1g/l,(c)3g/l,(d)5g/l,(e)7g/l；Fig. 2 are added to different amounts of micron order MoS2It is made after powder
The fretting wear curve of standby composite ceramic coat.As seen from the figure, with not plus micron order MoS2Powder is compared, and is added to micro-
Meter level MoS2Prepared composite ceramic coat hole considerably reduces after powder, finer and close, uniform；Importantly, adding
The micron order MoS of suitable amount (3g/l) is added2After powder, the friction and wear behavior of composite ceramic coat has obtained significantly changing
Kind, friction process is highly stable, and friction coefficient is substantially reduced.
Embodiment 2
In borate (Na2B4O7˙10H2O, concentration 10g/l) electrolyte, it is 20~50nm's that size is added in the electrolytic solution
TiO2Nano-powder, a concentration of 4g/l, is prepared using constant current mode, current density 4A/dm2, the differential arc oxidation time is 60 points
Clock.The micron order MoS of various concentration is added as needed in above-mentioned electrolyte2Powder, a concentration of 0.5g/l, 1g/l, 2g/l,
4g/l, 5g/l, 7g/l prepare composite ceramic coat as electrolyte.
With not plus micron order MoS2Powder is compared, and micron order MoS is added to2Prepared composite ceramic coat hole after powder
Gap considerably reduces, finer and close, uniform；Importantly, being added to proper amount of micron order MoS2(2g/l, 4g/l) powder
Afterwards, the friction and wear behavior of composite ceramic coat has obtained apparent improvement, and friction process is highly stable, and friction coefficient obviously drops
It is low.
Embodiment 3
In aluminate (NaAlO2, concentration 15g/l) and electrolyte, the TiO that size is 20~50nm is added in the electrolytic solution2It receives
Rice flour body, a concentration of 2g/l, is prepared using constant current mode, current density 15A/dm2, the differential arc oxidation time is 30 minutes.
The micron order MoS of various concentration is added as needed in above-mentioned electrolyte2Powder, a concentration of 0.5g/l, 1g/l, 2g/l, 4g/l,
5g/l, 7g/l prepare composite ceramic coat as electrolyte.
With not plus micron order MoS2Powder is compared, and micron order MoS is added to2Prepared composite ceramic coat hole after powder
Gap considerably reduces, finer and close, uniform；Importantly, being added to proper amount of micron order MoS2After powder, composite ceramics
The friction and wear behavior of coating has obtained apparent improvement, and friction process is highly stable, and friction coefficient is substantially reduced.
Above-described embodiment is the citing of the present invention, although disclosing highly preferred embodiment of the present invention and attached for the purpose of illustration
Figure, but it will be appreciated by those skilled in the art that：Without departing from the spirit and scope of the invention and the appended claims,
Various substitutions, changes and modifications are all possible.Therefore, the present invention should not be limited to interior disclosed in most preferred embodiment and attached drawing
Hold.
Claims (5)
1. a kind of electrolyte of differential arc oxidation self-lubricating composite ceramic coating, it is characterised in that including common differential arc oxidation electrolysis
Liquid, nanometer additive, micron order MoS2Powder；
The nanometer additive is Al2O3Or TiO2Nano-powder；Size is 20-50nm, a concentration of 0.5-4g/l；
The micron order MoS2Greatly 0.8-1.2 μm of the size of powder granule, a concentration of 0.5-7g/l.
2. a kind of electrolyte of differential arc oxidation self-lubricating composite ceramic coating as described in claim 1, it is characterised in that described
Common micro-arc oxidation electrolyte be silicate, borate or aluminate.
3. a kind of electrolyte of differential arc oxidation self-lubricating composite ceramic coating as described in claim 1, it is characterised in that described
Micron order MoS2A concentration of 1-5g/l of powder granule.
4. a kind of electrolyte of differential arc oxidation self-lubricating composite ceramic coating as described in claim 1, it is characterised in that described
Micron order MoS2A concentration of 2-4g/l of powder granule.
5. a kind of application process of the electrolyte of differential arc oxidation self-lubricating composite ceramic coating as described in claim 1, special
Sign is that substrate is to common are non-ferrous metal and its alloy, specifically：
Nanometer additive, micron order MoS is added in common micro-arc oxidation electrolyte2Powder is prepared using constant current mode, electric current
Density is 3-15A/dm2, the differential arc oxidation time is 30-60 minutes, obtains required differential arc oxidation self-lubricating composite ceramic coating；
The nanometer additive is Al2O3Or TiO2Nano-powder；Size is 20-50nm, a concentration of 0.5-4g/l；
The micron order MoS2Greatly 0.8-1.2 μm of the size of powder granule, a concentration of 0.5-7g/l.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110195248A (en) * | 2019-06-24 | 2019-09-03 | 哈尔滨工业大学 | A kind of metal material of modification and the method for modifying of metal surface |
| CN110315293A (en) * | 2019-07-11 | 2019-10-11 | 重庆金猫纺织器材有限公司 | The processing technology of ceramic ring spinning |
| CN112342591A (en) * | 2020-10-19 | 2021-02-09 | 四川轻化工大学 | Electrolyte solution for magnesium alloy surface micro-arc oxidation and preparation method of black coating |
| CN112501666A (en) * | 2020-12-14 | 2021-03-16 | 江阴金属材料创新研究院有限公司 | Treatment method of long-acting corrosion-resistant coating on surface of aluminum frame of solar component |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112342591B (en) * | 2020-10-19 | 2021-11-23 | 四川轻化工大学 | Electrolyte solution for magnesium alloy surface micro-arc oxidation and preparation method of black coating |
| CN112501666A (en) * | 2020-12-14 | 2021-03-16 | 江阴金属材料创新研究院有限公司 | Treatment method of long-acting corrosion-resistant coating on surface of aluminum frame of solar component |
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Application publication date: 20180831 |