CN110438541A - A kind of particle doping type complex gradient differential arc oxidation coating and multi-stage preparation process, application - Google Patents
A kind of particle doping type complex gradient differential arc oxidation coating and multi-stage preparation process, application Download PDFInfo
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- CN110438541A CN110438541A CN201910867095.XA CN201910867095A CN110438541A CN 110438541 A CN110438541 A CN 110438541A CN 201910867095 A CN201910867095 A CN 201910867095A CN 110438541 A CN110438541 A CN 110438541A
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- 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
- C25D11/024—Anodisation under pulsed or modulated current or potential
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- 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
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- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
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Abstract
The present invention relates to a kind of particle doping type complex gradient differential arc oxidation coating and multi-stage preparation process, application.The preparation method utilizes differential arc oxidization technique, in the electrolyte containing particulate, prepares the composite coating of heterogeneous particles doping in metal surface, which is higher than center portion, and the feature of gradient distribution is presented in compound particle in differential arc oxidation coating.The preparation method is to realize that target coating decomposes micro-arc oxidation process process step by step, successively experience particle adsorb in advance, coating fast-growth, particle it is main adsorb, particle-capture is compound, coating roughness finishing, a series of phase process of coating pore self-sealing, it presses stubble to carry out, finally realizes the high quality composite coating preparation of high-compactness, low roughness, particle gradient distribution.The present invention according to the function needs of target coating, can compound high rigidity particle, self-lubricating particle, conducting particles, bioactive particles etc., apply in field of metal material surface treatment.
Description
Technical field
The invention belongs to field of material surface treatment, and in particular to a kind of particle doping type complex gradient differential arc oxidation coating
And multi-stage preparation process, application.
Background technique
Disclosing the information of the background technology part, it is only intended to increase understanding of the overall background of the invention, without certainty
It is considered as recognizing or implying in any form that information composition has become existing skill well known to persons skilled in the art
Art.
For a long time, surface-coating technology is always a kind of conventional means of material modification, can assign material originally not
The characteristic that has enhances its primary characteristic.In recent years, surface treatment of differential arc oxidation (MAO) technology as a kind of emerging development
Technology has obtained very big concern, the TRANSIENT HIGH TEMPERATURE that arc discharge can be relied on to generate on the valve metals such as aluminium, magnesium, titanium, zirconium surface
High pressure effect, grows the ceramic film based on substrate metal oxide, the film layer is due to having the spies such as high impedance, electrical isolation
Property, it can substantially enhance the corrosion resistance of alloy, there is extraordinary application prospect.
However, increasingly requiring the integrated and multifunction of product with scientific and technical innovation and the development of industrial process, being
Reach this purpose and often requires that product workpiece has various functional expressions.How to facilitate, reliably realizes product
Multifunction is a trend of market development.
Although differential arc oxidization technique can make the light-alloys such as magnesium, aluminium, titanium have preferable anti-corrosion behavior, certain reality
Under operating condition, material is not required nothing more than with good corrosion resistance, it is also required to meet the special of its specific Service Environment with some
Function, such as wearability, self-lubrication, electric conductivity, electromagnetic wave shielding, catalytic activity, bioactivity.According to the market demand, benefit
With differential arc oxidization technique, preparing complex function coating is following development trend.
Using differential arc oxidization technique, by compound some high rigidity particles in the coating, self-lubricating particle, conducting particles,
The multifunction of differential arc oxidation coating may be implemented in the heterogeneous particles such as catalytic activity particle, bioactive particles.Existing research report
Road, using differential arc oxidization technique by ZrO2、Al2O3、SiO2、SiC、TiN、MoS2、TiO2, the particles such as HA, Ag be combined to differential of the arc oxygen
Change in film layer, the spies such as wearability, self-lubrication, photocatalytic, bioactivity, the antibiotic property except membranous layer corrosion resistance can be assigned
Property.But evenly dispersed feature is presented in the heterogeneous particles in these previous composite coatings.And material is in actual use process
In, its surface characteristic is increasingly focused on, the wearability of material is such as improved above all to improve the wearability on its surface layer, improves material
The catalysis characteristics of material it is primary be also intended to improve the catalysis characteristics on its surface layer.The composite coating of conventional uniform doping has not been able to consider
Material actual use needs, to limit the promotion of composite coating.
In the past when carrying out the preparation of differential arc oxidation coating, researcher would generally be by controlling pulse voltage, frequency, duty
Than etc. parameters regulate and control the growth rate and structure of coating, this is those skilled in the art's general technology, but inventor has found: its
It is substantially the speed and form that newly-generated oxidation product is controlled by regulating and controlling the size of Single Pulse Discharge energy, it is difficult to prepare
High-compactness, low roughness, particle gradient distribution high quality composite coating.
According to another report by obtaining the technologies such as magnetron sputtering, anodic oxidation, electro-deposition and differential arc oxidization technique parallel combinations
To a set of multistep group technology, but preparation process is cumbersome, equipment investment is big, not very practical.
Summary of the invention
In order to overcome the above problem, the present invention provides a kind of particle doping type complex gradient differential arc oxidation coating and multistages
Preparation method, application.The preparation method decomposes micro-arc oxidation process process step by step, successively particle is undergone to adsorb, apply in advance
The main absorption of layer fast-growth, particle, particle-capture be compound, coating roughness finishing, a series of phase process of coating pore self-sealing, pressure
Stubble carry out, finally obtain high-compactness, low roughness, particle gradient distribution high quality composite coating.
To realize the above-mentioned technical purpose, The technical solution adopted by the invention is as follows:
A kind of particle doping type complex gradient differential arc oxidation coating, the coating is from inside to outside successively are as follows: particle adsorbs in advance
The main absorption composite layer of composite layer, fast-growth layer, high-content particle, surface finishes, the coating appearance layer particle content are high
In center portion.
In the present invention, " coating appearance layer particle content is higher than center portion " refers to: mainly concentrating the highest part of particle content
In the main absorption composite layer of high-content particle.Under normal circumstances, the relationship of particle content are as follows: the main absorption composite layer > of high-content particle
Particle adsorbs composite layer > fast-growth layer in advance.
In the present invention, particulate refers to: be added to it is in electrolyte, differential arc oxidation film layer wearability, self-lubricating can be assigned
One kind or multiclass heterogeneous particles of the characteristics such as property, photocatalytic, bioactivity, antibiotic property can adopt in some embodiments
With: ZrO2、Al2O3、SiO2、SiC、TiN、MoS2、TiO2, at least one of HA or Ag.
The research of the invention finds that: energy size, persistent state and positive and negative anodes by the way that matching pulse is targetedly arranged
Property can control the migration, trapping, compound, vector motion of external source heterogeneous particles.Based on this, the present invention is in micro-arc oxidation process model
Grading design and preparation have been carried out to differential arc oxidation film layer under farmland, particle is made successively to undergo pre- absorption, coating fast-growth, particle
Main absorption, particle-capture is compound, coating roughness finishing, a series of phase process of coating pore self-sealing, and pressure stubble carries out, final to obtain
High-compactness, low roughness, particle gradient distribution high quality composite coating.
In some embodiments, it is compound to adsorb the main absorption of composite layer, fast-growth layer, high-content particle in advance for the particle
Layer, surface finishes thickness summation be 20~100 μm, wherein the thickness accounting of fast-growth layer be not less than 50%, high-content
The thickness accounting of the main absorption composite layer of particle is 10~30%, and the coating of preparation has preferable consistency, roughness and compound
The functional expression of particle is enhanced.
The present invention also provides a kind of multi-stage preparation process of particle doping type complex gradient differential arc oxidation coating, comprising:
Step 1: being placed in pretreated sample in the electrolyte containing particulate, anode is made, with or not sample to be processed
Rust steel makees cathode forming circuit system；
Step 2: particle adsorbs the preparation of composite layer in advance: promoting particle in the absorption of sample surfaces, form dielectric layer, swash
Spark jump electric discharge；
Step 3: the preparation of fast-growth layer: making differential arc oxidation layer fast-growth, reach predetermined thickness；
Step 4: the preparation of the main absorption composite layer of high-content particle: promoting particle in the absorption of coating surface, and make to adsorb
Compound enter in coating is captured in the high hot melt that the particle of coating surface is generated；
Step 5: the preparation of surface finishes: the tip on weaken coating surface protrusion and not capturing compound into coating
Particle closes larger electric discharge hole, and grows differential arc oxidation layer slowly.
The present invention designs the complex gradient coating that gradient distribution is presented in preparation heterogeneous particles, makes heterogeneous particles more
Integrated distribution can enhance the functional expression of compound particle in material surface to the maximum extent, realize and use the best steel to make the knife's edge
Effect.
In some embodiments, the particle adsorbs the preparation condition of composite layer in advance are as follows: applies positive pulse electric current, low electricity
Pressure: 20~80V, high duty ratio: 70~90%, low frequency: 10~60Hz, application time: 5~10s.Promote particle in sample table
The absorption in face quickly forms dielectric layer, excites spark discharge.
In some embodiments, the preparation condition of the fast-growth layer are as follows: apply positive pulse electric current, high voltage: 300~
600V, middle duty ratio: 15~50%, middle frequency: 200~800Hz, application time: 180~600s.Utilize lasting high-energy
Output, makes differential arc oxidation layer fast-growth, reaches predetermined thickness.
In some embodiments, the preparation condition of the main absorption composite layer of the high-content particle are as follows:
A. positive pulse electric current is applied to circuit system, application technique is middle voltage: 180~280V, high duty ratio: 70~
90%, low frequency: 10~60Hz, application time: 5~10s；Promote particle in the absorption of coating surface, to improve particle multiple
Close the content in coating appearance layer.
B. positive pulse electric current is applied to circuit system, application technique is high voltage: 300~600V, middle duty ratio: 15~
50%, middle frequency: 200~800Hz, application time: 20~40s；Make the high hot melt that the particle for being adsorbed on coating surface is generated
Body capture is compound to be entered in coating.
C. circulation carries out step a and b, cycle-index 1~4.
In some embodiments, the preparation condition of the surface finishes are as follows:
S1: negative pulse current, high voltage appearance: 200~350V, low duty ratio: 3~10%, high frequency are applied to circuit system
Rate: 700~1500Hz, application time: 0.5~5s；By exporting high-frequency negative pulse de minimis energy, weaken coating surface
Tip is raised and does not capture the compound particle into coating, reduces Coating Surface Roughness.
S2: positive pulse electric current is applied to circuit system, application technique is high voltage: 300~600V, middle low duty ratio: 8~
15%, high frequency: 600~1000Hz, application time: 15~20s；By the output of slightly lower energy, keep differential arc oxidation layer slow
Slow growth improves coating consistency and reduces Coating Surface Roughness to close larger electric discharge hole.
S3: circulation carries out step S1 and S2, cycle-index 1~6.
In some embodiments, the composition of the electrolyte are as follows: 15~18g/L of calgon, 5~8g/L of sodium metasilicate,
3~5g/L of sodium fluoride, 4~6g/L of silicon dioxide granule；
In some embodiments, the group of the electrolyte become 3~5g/L of calgon, two hydration potassium fluorides 8~
10g/L, 5~8g/L of sodium hydroxide, 10~12ml/L of ethylene glycol, 5~8g/L of nanometer hydroxyapatite particle.
The present invention also provides the particle doping type complex gradient differential arc oxidation coatings of any above-mentioned method preparation.
The present invention also provides above-mentioned particle doping type complex gradient differential arc oxidation coatings in military project, space flight and aviation and vapour
Vehicle, weaving or the application of machinery field.
The beneficial effects of the present invention are:
(1) particle doping type complex gradient differential arc oxidation coating of the present invention is realizing differential arc oxidation coating basic function
Outside, can also be according to the specific function needs of target coating, compound high rigidity particle, self-lubricating particle, conducting particles, life wherein
Object active particle etc. is to prepare the complex functions coating such as wear-resistant coating, anti-friction coating, conductive coating, bioactivity coatings.
(2) the characteristics of particle doping type complex gradient differential arc oxidation coating of the present invention is coating appearance layer particle content
Higher than center portion, the feature of gradient distribution is presented in compound particle in differential arc oxidation coating, by carrying out gradient point to compound particle
Cloth design, can enhance the functional expression of compound particle to the maximum extent.
(3) multi-stage preparation process of particle doping type complex gradient differential arc oxidation coating of the present invention, by the differential of the arc
Oxidation process is decomposed step by step, successively undergoes particle to adsorb in advance, coating fast-growth, the main absorption of particle, particle-capture
Compound, coating roughness finishing, a series of phase process of coating pore self-sealing, pressure stubble carries out, stubble stubble is progressive, and each stage, which releives, to be had
Sequence, motivated, internal logic association, finally can be achieved high-compactness (>=90%), low roughness (Ra≤0.3 μm), particle
It is prepared by the high quality composite coating of gradient distribution.
(4) operating method of the invention it is simple, it is at low cost, have universality, be easy to large-scale production.
Detailed description of the invention
The Figure of description for constituting a part of the invention is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.
Fig. 1 is the structural schematic diagram of particle doping type complex gradient differential arc oxidation coating prepared by the embodiment of the present invention 1.
Wherein, 1. alloy substrate, 2. particles adsorb composite layer in advance, and 3. fast-growth layers, the main absorption of 4. high-content particles is again
Close layer, 5. surface finishes.
Fig. 2 is the surface microstructure figure of the differential arc oxidation complex gradient coating prepared in embodiment 1.
Fig. 3 is the surface microstructure figure of the differential arc oxidation coating prepared in comparative example 1.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the present invention.Unless another
It indicates, all technical and scientific terms that the present invention uses have logical with general technical staff of the technical field of the invention
The identical meanings understood.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to exemplary embodiments of the present invention.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As background technique is introduced, evenly dispersed, limitation is presented for the heterogeneous particles in current composite coating
The problem of coating performance is promoted.Therefore, the present invention proposes a kind of particle doping type complex gradient differential arc oxidation coating and multistage
Preparation method, specific preparation include the following steps:
(1) sample to be processed is polished, cleaned, dried, is placed in the electrolyte containing particulate, sun is made with sample to be processed
Pole makees cathode building circuit system with stainless steel, carries out differential arc oxidation preparation；
(2) positive pulse electric current is applied to circuit system, application technique is low-voltage: 20~80V, high duty ratio: 70~
90%, low frequency: 10~60Hz, application time: 5~10s；
(3) positive pulse electric current is applied to circuit system, application technique is high voltage: 300~600V, middle duty ratio: 15~
50%, middle frequency: 200~800Hz, application time: 180~600s；
(4) positive pulse electric current is applied to circuit system, application technique is middle voltage: 180~280V, high duty ratio: 70~
90%, low frequency: 10~60Hz, application time: 5~10s；
(5) positive pulse electric current is applied to circuit system, application technique is high voltage: 300~600V, middle duty ratio: 15~
50%, middle frequency: 200~800Hz, application time: 20~40s；
(6) circulation carries out step (4) and (5), cycle-index 1~4；
(7) negative pulse current is applied to circuit system, application technique is high voltage appearance: 200~350V, low duty ratio: 3~
10%, high-frequency: 700~1500Hz, application time: 0.5~5s；
(8) positive pulse electric current is applied to circuit system, application technique is high voltage: 300~600V, middle low duty ratio: 8~
15%, high frequency: 600~1000Hz, application time: 15~20s；
(9) circulation carries out step (7) and (8), cycle-index 1~6.
(10) processing sample is taken out, is cleaned up.
Wherein, the purpose of step (2) is the absorption for promoting particle in sample surfaces, quickly forms dielectric layer, excitation fire
Flower electric discharge.
Wherein, the purpose of step (3) is to export using lasting high-energy, makes differential arc oxidation layer fast-growth, reaches
Predetermined thickness.
Wherein, the purpose of step (4) is the absorption for promoting particle in coating surface, to improve particle outside composite coating
Content in surface layer.
Wherein, the purpose of step (5) is that the high hot melt for being generated the particle for being adsorbed on coating surface capture is compound
Into in coating.
Wherein, the purpose of step (7) is by exporting high-frequency negative pulse de minimis energy, the point on weaken coating surface
End is raised and does not capture the compound particle into coating, reduces Coating Surface Roughness.
Wherein, the purpose of step (8) is the output by slightly lower energy, grows differential arc oxidation layer slowly, with closing
Larger electric discharge hole improves coating consistency and reduces Coating Surface Roughness.
Technical solution of the present invention is illustrated below by way of specific embodiment.
Embodiment 1
Configure electrolyte, electrolyte composition are as follows: calgon 15g/L, sodium metasilicate 5g/L, sodium fluoride 3g/L, titanium dioxide
Silicon particle 4g/L.It is handled according to the following steps:
(1) 6061 aluminum alloy sample to be processed is polished, cleaned, dried, is placed in above-mentioned electrolyte, with sample to be processed
Make anode, make cathode building circuit system with stainless steel, carries out differential arc oxidation preparation；
(2) positive pulse electric current is applied to circuit system, application technique is low-voltage: 60V, high duty ratio: 80%, low frequency
Rate: 40Hz, application time: 10s；
(3) positive pulse electric current is applied to circuit system, application technique is high voltage: 500V, middle duty ratio: 25%, intermediate frequency
Rate: 550Hz, application time: 500s；
(4) positive pulse electric current is applied to circuit system, application technique is middle voltage: 250V, high duty ratio: 80%, low frequency
Rate: 40Hz, application time: 8s；
(5) positive pulse electric current is applied to circuit system, application technique is high voltage: 520V, middle duty ratio: 25%, intermediate frequency
Rate: 550Hz, application time: 30s；
(6) circulation carries out step (4) and (5), cycle-index 2；
(7) negative pulse current is applied to circuit system, application technique is high voltage appearance: 300V, low duty ratio: 8%, high frequency
Rate: 1200Hz, application time: 3s；
(8) positive pulse electric current is applied to circuit system, application technique is high voltage: 520V, middle low duty ratio: 10%, in
High-frequency: 800Hz, application time: 20s；
(9) circulation carries out step (7) and (8), cycle-index 3.
(10) processing sample is taken out, is cleaned up.
Processing sample surface layer is scanned Electronic Speculum observation, surface microstructure figure can be observed as shown in attached drawing 2
It arrives, sample surfaces electric discharge hole negligible amounts, and without biggish hole, also without obvious protrusion, any surface finish is smooth, and surface layer is apparent
Consistency is 95 ± 2%, surface roughness Ra=0.203 μm, coating sealing of hole and finishing excellent effect.The present embodiment realizes aluminium
The preparation of alloy surface silicon dioxide granule doping type complex gradient differential arc oxidation coating.
Embodiment 2
Configure electrolyte, electrolyte composition are as follows: calgon 3g/L, two hydration potassium fluoride 8g/L, sodium hydroxide 5g/L,
Ethylene glycol 10ml/L, nanometer hydroxyapatite particle 5g/L.It is handled according to the following steps:
(1) pure magnesium sample to be processed is polished, cleaned, dried, is placed in above-mentioned electrolyte, sun is made with sample to be processed
Pole makees cathode building circuit system with stainless steel, carries out differential arc oxidation preparation；
(2) positive pulse electric current is applied to circuit system, application technique is low-voltage: 50V, high duty ratio: 70%, low frequency
Rate: 40Hz, application time: 8s；
(3) positive pulse electric current is applied to circuit system, application technique is high voltage: 360V, middle duty ratio: 20%, intermediate frequency
Rate: 600Hz, application time: 360s；
(4) positive pulse electric current is applied to circuit system, application technique is middle voltage: 200V, high duty ratio: 70%, low frequency
Rate: 40Hz, application time: 6s；
(5) positive pulse electric current is applied to circuit system, application technique is high voltage: 380V, middle duty ratio: 20%, intermediate frequency
Rate: 600Hz, application time: 25s；
(6) circulation carries out step (4) and (5), cycle-index 3；
(7) negative pulse current is applied to circuit system, application technique is high voltage appearance: 220V, low duty ratio: 5%, high frequency
Rate: 1000Hz, application time: 3s；
(8) positive pulse electric current is applied to circuit system, application technique is high voltage: 380V, middle low duty ratio: 10%, in
High-frequency: 650Hz, application time: 15s；
(9) circulation carries out step (7) and (8), cycle-index 4.
(10) processing sample is taken out, is cleaned up.
Through scanning electron microscopic observation, sample surfaces discharge hole negligible amounts, and without biggish hole, also without obvious raised,
Any surface finish is smooth, and the apparent consistency in surface layer is 95 ± 2%, surface roughness Ra=0.285 μm, coating sealing of hole and finishing effect
It is excellent.The present embodiment realizes the system of Mg alloy surface nanometer hydroxyapatite particle doping type complex gradient differential arc oxidation coating
It is standby.
Comparative example 1
Electrolyte is configured, electrolyte composition is in the same manner as in Example 1.It is handled according to the following steps:
(1) 6061 aluminum alloy sample to be processed is polished, cleaned, dried, is placed in above-mentioned electrolyte, with sample to be processed
Make anode, make cathode building circuit system with stainless steel, carries out differential arc oxidation preparation；
(2) positive pulse electric current is applied to circuit system, application technique is voltage: 300V, duty ratio: 25%, frequency:
300Hz, application time: 40s；
(3) positive pulse electric current is applied to circuit system, application technique is voltage: 550V, duty ratio: 25%, frequency:
550Hz, application time: 600s；
(4) processing sample is taken out, is cleaned up.
Processing sample surface layer is scanned Electronic Speculum observation, surface microstructure figure can be observed as shown in attached drawing 3
It arrives, the densely covered electric discharge hole of sample surfaces, it is seen that obvious oxide protrusion, the apparent consistency in surface layer are 60 ± 3%, surface roughness
Ra=1.472 μm.
Finally it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not limited to this hair
It is bright, although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still
It can modify to technical solution documented by previous embodiment, or part is equivalently replaced.It is all in this hair
Within bright spirit and principle, any modification, equivalent replacement, improvement and so on should be included in protection scope of the present invention
Within.Above-mentioned, although specific embodiments of the present invention have been described, and it is not intended to limit the protection scope of the present invention, institute
Category field technical staff should be understood that based on the technical solutions of the present invention those skilled in the art do not need to pay wound
The various modifications or changes that the property made labour can be made are still within protection scope of the present invention.
Claims (10)
1. a kind of particle doping type complex gradient differential arc oxidation coating, which is characterized in that the coating is from inside to outside successively are as follows: grain
Sub pre- absorption composite layer, fast-growth layer, the main absorption composite layer of high-content particle, surface finishes, the coating appearance layer grain
Sub- content is higher than center portion.
2. particle doping type complex gradient differential arc oxidation coating as described in claim 1, which is characterized in that the particle pre-suction
Attached composite layer, fast-growth layer, high-content particle it is main absorption composite layer, surface finishes thickness summation be 20~100 μm,
The thickness accounting of middle fast-growth layer is not less than 50%, and the thickness accounting of the main absorption composite layer of high-content particle is 10~30%.
3. a kind of multi-stage preparation process of particle doping type complex gradient differential arc oxidation coating characterized by comprising
Step 1: being placed in pretreated sample in the electrolyte containing particulate, anode is made, with stainless steel with sample to be processed
Make cathode forming circuit system；
Step 2: particle adsorbs the preparation of composite layer in advance: promoting particle in the absorption of sample surfaces, form dielectric layer, excitation fire
Flower electric discharge；
Step 3: the preparation of fast-growth layer: making differential arc oxidation layer fast-growth, reach predetermined thickness；
Step 4: the preparation of the main absorption composite layer of high-content particle: promoting particle in the absorption of coating surface, and make to be adsorbed on painting
The high hot melt capture that the particle of layer surface is generated is compound to be entered in coating；
Step 5: the preparation of surface finishes: the tip on weaken coating surface is raised and does not capture the compound particle into coating,
Larger electric discharge hole is closed, and grows differential arc oxidation layer slowly.
4. the multi-stage preparation process of particle doping type complex gradient differential arc oxidation coating as claimed in claim 3, feature exist
In the particle adsorbs the preparation condition of composite layer in advance are as follows: apply positive pulse electric current, low-voltage: 20~80V, high duty ratio: 70
~90%, low frequency: 10~60Hz, application time: 5~10s.
5. the multi-stage preparation process of particle doping type complex gradient differential arc oxidation coating as claimed in claim 3, feature exist
In the preparation condition of the fast-growth layer are as follows: apply positive pulse electric current, high voltage: 300~600V, middle duty ratio: 15~
50%, middle frequency: 200~800Hz, application time: 180~600s.
6. the multi-stage preparation process of particle doping type complex gradient differential arc oxidation coating as claimed in claim 3, feature exist
In the preparation condition of the main absorption composite layer of high-content particle are as follows:
A. positive pulse electric current is applied to circuit system, application technique is middle voltage: 180~280V, high duty ratio: 70~90%,
Low frequency: 10~60Hz, application time: 5~10s；
B. positive pulse electric current is applied to circuit system, application technique is high voltage: 300~600V, middle duty ratio: 15~50%,
Middle frequency: 200~800Hz, application time: 20~40s；
C. circulation carries out step a and b, cycle-index 1~4.
7. the multi-stage preparation process of particle doping type complex gradient differential arc oxidation coating as claimed in claim 3, feature exist
In the preparation condition of the surface finishes are as follows:
S1: negative pulse current is applied to circuit system, high voltage appearance: 200~350V, low duty ratio: 3~10%, high-frequency:
700~1500Hz, application time: 0.5~5s；
S2: positive pulse electric current is applied to circuit system, application technique is high voltage: 300~600V, middle low duty ratio: 8~
15%, high frequency: 600~1000Hz, application time: 15~20s；
S3: circulation carries out step S1 and S2, cycle-index 1~6.
8. the multi-stage preparation process of particle doping type complex gradient differential arc oxidation coating as claimed in claim 3, feature exist
In the composition of the electrolyte are as follows: 15~18g/L of calgon, 5~8g/L of sodium metasilicate, 3~5g/L of sodium fluoride, titanium dioxide
4~6g/L of silicon particle；
Or the group of the electrolyte becomes 3~5g/L of calgon, two hydration 8~10g/L of potassium fluoride, 5~8g/ of sodium hydroxide
L, 10~12ml/L of ethylene glycol, 5~8g/L of nanometer hydroxyapatite particle.
9. the particle doping type complex gradient differential arc oxidation coating of the described in any item method preparations of claim 3-8.
10. particle doping type complex gradient differential arc oxidation coating is in military project, space flight and aviation and vapour described in claim 1,2 or 9
Vehicle, weaving or the application of machinery field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910867095.XA CN110438541B (en) | 2019-09-12 | 2019-09-12 | Particle-doped composite gradient micro-arc oxidation coating, multistage preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910867095.XA CN110438541B (en) | 2019-09-12 | 2019-09-12 | Particle-doped composite gradient micro-arc oxidation coating, multistage preparation method and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110438541A true CN110438541A (en) | 2019-11-12 |
| CN110438541B CN110438541B (en) | 2020-08-28 |
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