CN112538647A - Method for preparing aluminum oxide-based ceramic coating by electrolyzing liquid phase plasma on surface of stainless steel - Google Patents
Method for preparing aluminum oxide-based ceramic coating by electrolyzing liquid phase plasma on surface of stainless steel Download PDFInfo
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Abstract
Method for preparing Al by electrolyzing stainless steel surface liquid phase plasma2O3The invention discloses a method for preparing a ceramic coating, which relates to the field of stainless steel surface modification and mainly solves the problems that the existing method for preparing the ceramic coating on the surface of a stainless steel is complex in process, expensive in required equipment and difficult to prepare the ceramic coating on the surface of a workpiece with a complex shape. The method comprises the following steps: firstly, polishing and cleaning the surface of a stainless steel sample; secondly, preparing electrolyte; thirdly, connecting the sample to a double-pulse power supply, and carrying out electrolytic deposition for 5-240 min under the conditions that the temperature of the electrolyte is 10-100 ℃, the positive pulse is 10-1000V, the negative pulse is 10-500V, the working frequency is 50-2000 Hz, and the duty ratio is 5-50%; fourthly, cleaning and drying to obtain Al2O3A base ceramic coating. The method has the advantages of simple required equipment, easily adjustable process parameters, uniform ceramic coating structure, high film forming speed, simple operation and easy realization of automation. The invention is applied to the field of wear resistance and corrosion resistance of stainless steel.
Description
Technical Field
The invention relates to the field of stainless steel surface modification, in particular to a method for preparing an alumina-based ceramic coating by stainless steel surface liquid phase plasma electrolysis.
Background
Stainless steel is widely used in various fields because of its excellent corrosion resistance. However, the hardness is not high, the friction and wear performance is poor, and the composite performance requirements of wear resistance and corrosion resistance cannot be met; therefore, the range of use thereof is limited to some extent. In order to solve such a situation, it is a major problem to be solved in the present emergency to improve the wear resistance of the stainless steel surface.
As is well known, ceramics have the characteristics of high hardness and good wear resistance. Therefore, if a ceramic coating is compounded on the surface of the stainless steel, the surface performance of the stainless steel is greatly improved. The liquid phase plasma electrolysis technology is a novel technology developed on the basis of anodic oxidation for growing a ceramic coating on the surface of metal. The treatment process comprises the steps of putting metal into electrolyte, applying certain voltage for electrolysis, generating plasma micro-arc discharge on the surface of an electrode sample by an electrochemical method, and generating a ceramic film layer on the surface of the metal under the combined action of thermochemistry, plasma chemistry and electrochemistry.
The liquid phase plasma electrolysis technology is mainly divided into an anode plasma electrolysis technology and a cathode liquid phase plasma electrolysis technology according to different anode and cathode of a sample connecting power supply. The anolyte phase plasma electrolysis technology takes valve metals such as Al, Mg, Ti and the like and alloy thereof as an anode, and can prepare a wear-resistant, corrosion-resistant, impact-resistant and insulating high-quality ceramic membrane on the surface of the metal. Because plasma participates in the ceramic coating forming process, the reaction process under the plasma condition can endow the ceramic coating with excellent wear-resisting and corrosion-resisting properties. Anolyte-phase ion electrolysis is also commonly referred to as "micro-arc oxidation," but has traditionally been considered suitable only for valve metals. The invention breaks the traditional view, and Al can still be obtained on the non-valve metal stainless steel2O3A base ceramic coating. The cathode liquid phase plasma electrolysis technology takes the treated metal as a cathode, the gas film or the prefabricated film on the surface of the metal matrix is broken down and discharged under a higher voltage to generate micro-arcs, the energy of the micro-arcs sinters the deposit into a ceramic layer, the method can break the limitation of the matrix material, and the ceramic coating is obtained on the stainless steel.
The existing method has the problems of complex process for preparing the ceramic coating on the surface of the stainless steel, expensive required equipment and difficulty in preparing the ceramic coating on the surface of a workpiece with a complex shape.
Disclosure of Invention
The invention aims to provide a method for preparing an alumina-based ceramic coating by stainless steel surface liquid phase plasma electrolysis.
A method for preparing an alumina-based ceramic coating through liquid phase plasma electrolysis on a stainless steel surface comprises the steps of putting a pretreated stainless steel sample into an electrolyte, connecting the sample to a double-pulse power supply, and electrolyzing for 5-240 min under the conditions that the temperature of the electrolyte is 10-100 ℃, the positive pulse is 10-1000V, the negative pulse is 10-500V, the working frequency is 50-2000 Hz, and the duty ratio is 5-50%, so as to form the alumina-based ceramic coating on the surface of the stainless steel sample.
The further improvement of the invention is that the specific process of the surface pretreatment of the stainless steel sample comprises the following steps: and (3) grinding and polishing the stainless steel sample, and then carrying out ultrasonic cleaning by using an ethanol solution with the mass percentage of 95%.
The further improvement of the invention is that 320#, 600#, 1000# and 1500# sandpaper are adopted to polish and polish the stainless steel sample in turn; the stainless steel coupons were 310, 304, 316, 201, or 347 stainless steel.
The electrolyte comprises sodium metaaluminate, an aluminum nitrate solution and alkali, wherein the concentration of the sodium metaaluminate is 0.05-2 mol/L, the concentration of the aluminum nitrate solution is 0.01-1 mol/L, and the concentration of the alkali solution is 0.01-0.3 mol/L.
In a further development of the invention, the base is potassium hydroxide or sodium hydroxide.
The method is further improved in that electrolysis is carried out for 10-200 min under the conditions that the temperature of the electrolyte is 15-90 ℃, the positive pulse is 100-1000V, the negative pulse is 10-40V, the working frequency is 100-1800 Hz, and the duty ratio is 6-45%.
The method is further improved in that electrolysis is carried out for 20-180 min under the conditions that the temperature of the electrolyte is 25-80 ℃, the positive pulse is 10-30V, the negative pulse is 50-500V, the working frequency is 200-1600 Hz, and the duty ratio is 6-40%.
The further improvement of the invention is that the electrolysis is carried out for 20min under the conditions that the temperature of the electrolyte is 45 ℃, the positive pulse is 500V, the negative pulse is 20V, the working frequency is 1000Hz and the duty ratio is 10 percent.
Compared with the prior art, the invention has the following beneficial effects:
1. the method directly forms Al on the surface of the stainless steel by the liquid-phase plasma electrolysis technology2O3A base ceramic coating. Since the whole process is carried out in a liquid phase environment, the ceramic coating can be formed on the surface of any shape. The method has the advantages of easy adjustment of power supply technological parameters and electrolyte components, convenient control of the structure and thickness of the ceramic coating, simple equipment operation and easy realization of automation.
2. The power supply used by the method is a double-pulse power supply, the advantages of the anode plasma electrolysis technology and the cathode liquid plasma electrolysis technology are combined, the obtained ceramic coating is well combined with the matrix, and the limitation that micro-arc oxidation cannot process valve metal is broken.
Drawings
FIG. 1 shows Al prepared according to the present invention2O3A schematic cross-sectional view of a base ceramic coating;
FIG. 2 shows Al prepared in example 12O3SEM image of the surface of the base ceramic coating;
FIG. 3 shows Al prepared in example 12O3EDS picture of base ceramic coating surface.
In the figure, 1 is a porous layer, 2 is a dense layer, and 3 is a stainless steel substrate.
Detailed Description
The technical solution of the present invention is not limited to the following examples, but includes any combination between the examples.
The invention relates to a method for preparing Al by stainless steel surface liquid phase plasma electrolysis2O3The method for coating the base ceramic comprises the following steps:
firstly, surface pretreatment of a stainless steel sample: sequentially grinding and polishing stainless steel samples by using 320#, 600#, 1000# and 1500# abrasive paper, then ultrasonically cleaning for 10min by using 95% ethanol solution in percentage by mass, and then drying for later use by using a blower;
wherein, the stainless steel sample is 310, 304, 316, 201 or 347 stainless steel.
Secondly, preparing electrolyte: preparing an electrolyte by using deionized water as a solvent, wherein the electrolyte consists of a sodium metaaluminate solution with the concentration of 0.05-2 mol/L, an aluminum nitrate solution with the concentration of 0.01-1 mol/L and a strong base solution with the concentration of 0.01-0.3 mol/L, and the strong base can be potassium hydroxide or sodium hydroxide;
preferably, the electrolyte consists of a sodium metaaluminate solution with the concentration of 0.08-1.8 mol/L, an aluminum nitrate solution with the concentration of 0.01-1.5 mol/L and a strong alkali solution with the concentration of 0.03-0.25 mol/L, wherein the strong alkali can be potassium hydroxide or sodium hydroxide.
Thirdly, liquid phase plasma electrolysis process parameters: putting the stainless steel sample pretreated in the first step into electrolyte, connecting the sample on a double-pulse power supply, and electrolyzing for 5-240 min under the conditions that the temperature of the electrolyte is 10-100 ℃, the positive pulse is 10-1000V, the negative pulse is 10-500V, the working frequency is 50-2000 Hz, and the duty ratio is 5-50%;
preferably, electrolysis is carried out for 10-200 min under the conditions that the temperature of the electrolyte is 15-90 ℃, the positive pulse is 100-1000V, the negative pulse is 10-40V, the working frequency is 100-1800 Hz, and the duty ratio is 6-45%.
Preferably, electrolysis is carried out for 20-180 min under the conditions that the temperature of the electrolyte is 25-80 ℃, the positive pulse is 10-30V, the negative pulse is 50-500V, the working frequency is 200-1600 Hz, and the duty ratio is 6-40%.
Preferably, the electrolysis is carried out for 20min under the conditions that the temperature of the electrolyte is 45 ℃, the positive pulse is 500V, the negative pulse is 20V, the working frequency is 1000Hz, and the duty ratio is 10%.
Fourthly, taking the stainless steel sample treated in the third step, washing the stainless steel sample by deionized water for 3-5 times, and drying the stainless steel sample by a blower to obtain Al2O3A base ceramic coating.
Example 1
The liquid phase plasma electrolysis for preparing Al on the surface of stainless steel in the embodiment2O3The base ceramic coating is carried out according to the following steps:
firstly, surface pretreatment of a stainless steel sample: sequentially grinding and polishing stainless steel samples by using 320#, 600#, 1000# and 1500# abrasive paper, then ultrasonically cleaning for 10min by using 95% ethanol solution in percentage by mass, and then drying for later use by using a blower;
secondly, preparing electrolyte: preparing an electrolyte by using deionized water as a solvent, wherein the electrolyte consists of a sodium metaaluminate solution with the concentration of 0.2mol/L, an aluminum nitrate solution with the concentration of 0.01mol/L and a strong alkali solution with the concentration of 0.03mol/L, and the strong alkali can be potassium hydroxide or sodium hydroxide;
thirdly, liquid phase plasma electrolysis process parameters: putting the stainless steel sample pretreated in the first step into electrolyte, connecting the sample on a double-pulse power supply, and electrolyzing for 20min under the conditions that the temperature of the electrolyte is 10-100 ℃, the positive pulse is 600V, the negative pulse is 20V, the working frequency is 1000Hz, and the duty ratio is 10%;
fourthly, taking the stainless steel sample treated in the third step, washing the stainless steel sample for 3 times by using deionized water, and drying the stainless steel sample by using a blower to obtain Al2O3A base ceramic coating.
In the embodiment, the ceramic coating is directly formed on the surface of the stainless steel by a liquid-phase plasma electrolysis technology. Since the whole process is carried out in a liquid phase environment, the ceramic coating can be formed on the surface of any shape. The method has the advantages of easy adjustment of process parameters, convenient control of the structure and thickness of the ceramic coating, simple equipment operation and easy realization of automation.
The double-pulse power supply used by the invention has the advantages of an anode plasma electrolysis technology and a cathode liquid plasma electrolysis technology, and the obtained ceramic coating not only has good combination with a matrix, but also breaks through the limitation of valve metal. The technology is not limited by matrix materials and shapes, the sediment mainly comes from electrolyte, and the coating can be regulated and controlled by regulating power supply technological parameters and the electrolyte.
Al obtained by the invention2O3The cross section of the base ceramic coating is shown in fig. 1, and the whole cross section of the coating formed on the stainless steel substrate 3 is divided into two layers, namely an outer layer is a porous layer 1 and an inner layer is a dense layer 2.
For Al obtained in this example2O3The surface of the base ceramic coating was observed by Scanning Electron Microscopy (SEM), and the results are shown in fig. 2, which shows that the coating covers the entire sample surface, resembling a typical "volcano" surface topography. EDS (electron-dispersive spectroscopy) detection is carried out on the coating, and as shown in figure 3, aluminum Al and oxygen O elements mainly exist in the coating. The bonding strength of the coating and the substrate is 36MPa, the hardness of the coated sample is 1167HV, and the wear rate of the coated sample is 2.3X 10-5mg/N·m。
Example 2
This example differs from example 1 in that: the positive pulse in step three was 10V and the negative pulse was 450V, and other steps and parameters were the same as in example 1.
Al obtained in example2O3The surface of the base ceramic coating, similar to the coating of example 1, covered the entire substrate, with the majority of the aluminum Al and oxygen O elements present in the coating. The bonding strength of the coating and the substrate is 41MPa, the hardness of the coated sample is 1184HV, and the wear rate of the coated sample is 1.9 x 10-5mg/N·m。
Example 3
This example differs from example 1 in that: the concentration of the aluminum nitrate solution in the second step is 0.1mol/L, and other steps and parameters are the same as those of the embodiment 1.
Al obtained in example2O3The base ceramic coating was thicker than that obtained in example 1, and the coating had primarily aluminum Al and oxygen O elements present. The bonding strength of the coating and the substrate was 44MPa, the hardness of the coated sample was 1197HV, and the wear rate of the coated sample was 1.1X 10-5mg/N·m。
Example 4
The liquid phase plasma electrolysis for preparing Al on the surface of stainless steel in the embodiment2O3The base ceramic coating is carried out according to the following steps:
firstly, surface pretreatment of a stainless steel sample: sequentially grinding and polishing stainless steel samples by using 320#, 600#, 1000# and 1500# abrasive paper, then ultrasonically cleaning for 10min by using 95% ethanol solution in percentage by mass, and then drying for later use by using a blower;
secondly, preparing electrolyte: preparing an electrolyte by using deionized water as a solvent, wherein the electrolyte comprises a sodium metaaluminate solution, aluminum nitrate and strong base, the concentration of the sodium metaaluminate solution is 0.08mol/L, the concentration of the aluminum nitrate solution is 0.01mol/L, the concentration of the strong base is 0.25mol/L, and the strong base is potassium hydroxide;
thirdly, liquid phase plasma electrolysis process parameters: putting the stainless steel sample pretreated in the first step into electrolyte, connecting the sample on a double-pulse power supply, and electrolyzing for 240min under the conditions that the temperature of the electrolyte is 10 ℃, the positive pulse is 10V, the negative pulse is 500V, the working frequency is 2000Hz and the duty ratio is 50%;
fourthly, taking the stainless steel sample treated in the third step, washing the stainless steel sample for 3 times by using deionized water, and drying the stainless steel sample by using a blower to obtain Al2O3A base ceramic coating.
Example 5
The liquid phase plasma electrolysis for preparing Al on the surface of stainless steel in the embodiment2O3The base ceramic coating is carried out according to the following steps:
firstly, surface pretreatment of a stainless steel sample: sequentially grinding and polishing stainless steel samples by using 320#, 600#, 1000# and 1500# abrasive paper, then ultrasonically cleaning for 10min by using 95% ethanol solution in percentage by mass, and then drying for later use by using a blower;
secondly, preparing electrolyte: preparing an electrolyte by using deionized water as a solvent, wherein the electrolyte comprises a sodium metaaluminate solution, aluminum nitrate and strong base, the concentration of the sodium metaaluminate solution is 1.8mol/L, the concentration of the aluminum nitrate solution is 0.1mol/L, the concentration of the strong base is 0.03mol/L, and the strong base is sodium hydroxide;
thirdly, liquid phase plasma electrolysis process parameters: putting the stainless steel sample pretreated in the first step into electrolyte, connecting the sample on a double-pulse power supply, and electrolyzing for 5min under the conditions that the temperature of the electrolyte is 100 ℃, the positive pulse is 1000V, the negative pulse is 10V, the working frequency is 50Hz and the duty ratio is 5%;
fourthly, taking the stainless steel sample treated in the third step, washing the stainless steel sample for 3 times by using deionized water, and drying the stainless steel sample by using a blower to obtain Al2O3Base potteryAnd (4) coating with porcelain.
Example 6
The liquid phase plasma electrolysis for preparing Al on the surface of stainless steel in the embodiment2O3The base ceramic coating is carried out according to the following steps:
firstly, surface pretreatment of a stainless steel sample: sequentially grinding and polishing stainless steel samples by using 320#, 600#, 1000# and 1500# abrasive paper, then ultrasonically cleaning for 10min by using 95% ethanol solution in percentage by mass, and then drying for later use by using a blower;
secondly, preparing electrolyte: preparing an electrolyte by using deionized water as a solvent, wherein the electrolyte comprises a sodium metaaluminate solution, aluminum nitrate and strong base, the concentration of the sodium metaaluminate solution is 0.5mol/L, the concentration of the aluminum nitrate solution is 1mol/L, the concentration of the strong base is 0.1mol/L, and the strong base is potassium hydroxide;
thirdly, liquid phase plasma electrolysis process parameters: putting the stainless steel sample pretreated in the first step into electrolyte, connecting the sample on a double-pulse power supply, and electrolyzing for 100min under the conditions that the temperature of the electrolyte is 15 ℃, the positive pulse is 1000V, the negative pulse is 40V, the working frequency is 180Hz, and the duty ratio is 45%;
fourthly, taking the stainless steel sample treated in the third step, washing the stainless steel sample for 3 times by using deionized water, and drying the stainless steel sample by using a blower to obtain Al2O3A base ceramic coating.
Example 7
The liquid phase plasma electrolysis for preparing Al on the surface of stainless steel in the embodiment2O3The base ceramic coating is carried out according to the following steps:
firstly, surface pretreatment of a stainless steel sample: sequentially grinding and polishing stainless steel samples by using 320#, 600#, 1000# and 1500# abrasive paper, then ultrasonically cleaning for 10min by using 95% ethanol solution in percentage by mass, and then drying for later use by using a blower;
secondly, preparing electrolyte: preparing an electrolyte by using deionized water as a solvent, wherein the electrolyte comprises a sodium metaaluminate solution, aluminum nitrate and strong base, the concentration of the sodium metaaluminate solution is 1mol/L, the concentration of the aluminum nitrate solution is 0.5mol/L, the concentration of the strong base is 0.2mol/L, and the strong base is sodium hydroxide;
thirdly, liquid phase plasma electrolysis process parameters: putting the stainless steel sample pretreated in the first step into electrolyte, connecting the sample on a double-pulse power supply, and electrolyzing for 200min under the conditions that the temperature of the electrolyte is 90 ℃, the positive pulse is 100V, the negative pulse is 10V, the working frequency is 1800Hz and the duty ratio is 6%;
fourthly, taking the stainless steel sample treated in the third step, washing the stainless steel sample for 3 times by using deionized water, and drying the stainless steel sample by using a blower to obtain Al2O3A base ceramic coating.
Example 8
The liquid phase plasma electrolysis for preparing Al on the surface of stainless steel in the embodiment2O3The base ceramic coating is carried out according to the following steps:
firstly, surface pretreatment of a stainless steel sample: sequentially grinding and polishing stainless steel samples by using 320#, 600#, 1000# and 1500# abrasive paper, then ultrasonically cleaning for 10min by using 95% ethanol solution in percentage by mass, and then drying for later use by using a blower;
secondly, preparing electrolyte: preparing an electrolyte by using deionized water as a solvent, wherein the electrolyte comprises a sodium metaaluminate solution, aluminum nitrate and strong base, the concentration of the sodium metaaluminate solution is 1.3mol/L, the concentration of the aluminum nitrate solution is 1.5mol/L, the concentration of the strong base is 0.07mol/L, and the strong base is potassium hydroxide;
thirdly, liquid phase plasma electrolysis process parameters: putting the stainless steel sample pretreated in the step one into electrolyte, connecting the sample on a double-pulse power supply, and electrolyzing for 180min under the conditions that the temperature of the electrolyte is 25 ℃, the positive pulse is 10V, the negative pulse is 500V, the working frequency is 1600Hz and the duty ratio is 40%;
fourthly, taking the stainless steel sample treated in the third step, washing the stainless steel sample for 3 times by using deionized water, and drying the stainless steel sample by using a blower to obtain Al2O3A base ceramic coating.
Example 9
The liquid phase plasma electrolysis for preparing Al on the surface of stainless steel in the embodiment2O3The base ceramic coating is carried out according to the following steps:
firstly, surface pretreatment of a stainless steel sample: sequentially grinding and polishing stainless steel samples by using 320#, 600#, 1000# and 1500# abrasive paper, then ultrasonically cleaning for 10min by using 95% ethanol solution in percentage by mass, and then drying for later use by using a blower;
secondly, preparing electrolyte: preparing an electrolyte by using deionized water as a solvent, wherein the electrolyte comprises a sodium metaaluminate solution, aluminum nitrate and strong base, the concentration of the sodium metaaluminate solution is 1.5mol/L, the concentration of the aluminum nitrate solution is 0.7mol/L, the concentration of the strong base is 0.15mol/L, and the strong base is sodium hydroxide;
thirdly, liquid phase plasma electrolysis process parameters: putting the stainless steel sample pretreated in the first step into electrolyte, connecting the sample on a double-pulse power supply, and electrolyzing for 20min under the conditions that the temperature of the electrolyte is 80 ℃, the positive pulse is 30V, the negative pulse is 50V, the working frequency is 200Hz, and the duty ratio is 6%;
fourthly, taking the stainless steel sample treated in the third step, washing the stainless steel sample for 3 times by using deionized water, and drying the stainless steel sample by using a blower to obtain Al2O3A base ceramic coating.
The surface of the coating prepared by the invention is observed by a Scanning Electron Microscope (SEM), the test result is shown in figure 2, and the coating covers the whole surface of the sample. EDS (electron-dispersive spectroscopy) detection is carried out on the coating, and as shown in figure 3, aluminum Al and oxygen O elements mainly exist in the coating. Measurement of Al2O3The bonding strength of the base ceramic coating and the stainless steel substrate 3 is found to be more than 30 MPa. By hardness test, Al is measured2O3The hardness of the base ceramic coating samples was greater than 1100HV, while the stainless steel substrate was about 135 HV. The abrasion rate of the matrix is about 8.8 multiplied by 10 measured by the friction abrasion test-5mg/N.m, the wear rate of the coated sample is 0.6 to 3.5X 10-5mg/N·m。
Claims (8)
1. A method for preparing an alumina-based ceramic coating through liquid phase plasma electrolysis on a stainless steel surface is characterized by comprising the steps of putting a pretreated stainless steel sample into an electrolyte, connecting the sample to a double-pulse power supply, and electrolyzing for 5-240 min under the conditions that the temperature of the electrolyte is 10-100 ℃, the positive pulse is 10-1000V, the negative pulse is 10-500V, the working frequency is 50-2000 Hz, and the duty ratio is 5-50%, so that the alumina-based ceramic coating is formed on the surface of the stainless steel sample.
2. The method for preparing the alumina-based ceramic coating by the liquid phase plasma electrolysis on the surface of the stainless steel according to claim 1, which is characterized in that the specific process of the surface pretreatment of the stainless steel sample comprises the following steps: and (3) grinding and polishing the stainless steel sample, and then carrying out ultrasonic cleaning by using an ethanol solution with the mass percentage of 95%.
3. The method for preparing the alumina-based ceramic coating by the liquid phase plasma electrolysis of the stainless steel surface according to claim 1, wherein 320#, 600#, 1000# and 1500# sandpaper are used for sequentially grinding and polishing a stainless steel sample; the stainless steel coupons were 310, 304, 316, 201, or 347 stainless steel.
4. The method for preparing the alumina-based ceramic coating through liquid phase plasma electrolysis on the surface of the stainless steel according to claim 1, wherein the electrolyte comprises sodium metaaluminate, an aluminum nitrate solution and an alkali, wherein the concentration of the sodium metaaluminate is 0.05-2 mol/L, the concentration of the aluminum nitrate solution is 0.01-1 mol/L, and the concentration of the alkali solution is 0.01-0.3 mol/L.
5. The method for preparing the alumina-based ceramic coating by the liquid phase plasma electrolysis of the surface of the stainless steel according to claim 4, wherein the alkali is potassium hydroxide or sodium hydroxide.
6. The method for preparing the alumina-based ceramic coating through liquid-phase plasma electrolysis on the surface of stainless steel according to claim 1, wherein electrolysis is carried out for 10-200 min under the conditions that the temperature of the electrolyte is 15-90 ℃, the positive pulse is 100-1000V, the negative pulse is 10-40V, the working frequency is 100-1800 Hz, and the duty ratio is 6-45%.
7. The method for preparing the alumina-based ceramic coating through liquid-phase plasma electrolysis on the surface of stainless steel according to claim 1, wherein electrolysis is carried out for 20-180 min under the conditions that the temperature of the electrolyte is 25-80 ℃, the positive pulse is 10-30V, the negative pulse is 50-500V, the working frequency is 200-1600 Hz, and the duty ratio is 6-40%.
8. The method for preparing the alumina-based ceramic coating through the liquid phase plasma electrolysis on the surface of the stainless steel according to claim 1, wherein the electrolysis is carried out for 20min under the conditions that the temperature of the electrolyte is 45 ℃, the positive pulse is 500V, the negative pulse is 20V, the working frequency is 1000Hz, and the duty ratio is 10%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113430613A (en) * | 2021-06-17 | 2021-09-24 | 西安交通大学 | Method for preparing ceramic coating on inner surface and outer surface of complex special-shaped component |
| CN114214689A (en) * | 2022-01-11 | 2022-03-22 | 山东省科学院新材料研究所 | Method for electrodepositing ceramic coating by bipolar pulse cathode plasma with low current density |
| CN114214689B (en) * | 2022-01-11 | 2023-09-01 | 山东省科学院新材料研究所 | Low current density bipolar pulse cathode plasma electro-deposition ceramic coating method |
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