CN112575358A - Aluminum-plated steel surface corrosion-resistant micro-arc oxidation film layer and preparation method and application thereof - Google Patents
Aluminum-plated steel surface corrosion-resistant micro-arc oxidation film layer and preparation method and application thereof Download PDFInfo
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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
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- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
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- 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
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
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Abstract
The invention discloses a preparation method and application of an anti-corrosion micro-arc oxidation film layer on the surface of an aluminum-plated steel product. The preparation method comprises the following steps: preparing an electrolyte: dissolving sodium hexametaphosphate, sodium silicate, sodium tungstate, disodium ethylene diamine tetraacetate, cerium dioxide and yttrium oxide in water to obtain electrolyte; micro-arc oxidation treatment: and placing the electrolyte in an electrolytic bath to connect with a cathode, connecting the aluminum-plated steel with an anode, and carrying out electrolytic oxidation treatment to obtain the micro-arc oxidation film layer of the aluminum-plated steel. According to the invention, a micro-arc oxidation coating technology is adopted, two rare earth elements of cerium and yttrium are added into the electrolyte, so that the cathode reaction can be hindered, a metal oxide film containing cerium and yttrium is formed at the anode, the generated surface oxide film layer becomes smooth and compact, the oxide film layer has lower self-corrosion current density, the corrosion resistance is obviously enhanced, and the steel substrate can be better protected.
Description
Technical Field
The invention relates to the technical field of micro-arc oxidation, in particular to an aluminum-plated steel surface corrosion-resistant micro-arc oxidation film layer and a preparation method and application thereof.
Background
In order to prevent the damage of corrosion failure of steel parts in an electric power system to a power grid and ensure the stability of local power supply, the corrosion resistance of the steel parts must be improved. For years, a great deal of research and development work has been carried out to reduce the corrosion of steel materials, and the application of surface engineering technology to the surface modification of materials has become the most concerned field of researchers, and has become an important method for prolonging the service life of steel parts.
Micro-arc oxidation treatment is also called micro-plasma oxidation or anode spark deposition. Compared with the traditional chemical oxidation treatment and anodic oxidation treatment, the method has the advantages of simple process, high production efficiency and small influence on the environment; meanwhile, the micro-arc oxidation film is formed under high temperature and high pressure generated by arc discharge, and compared with the oxidation film formed by chemical oxidation treatment and anodic oxidation treatment, the micro-arc oxidation film has higher hardness, better wear resistance and better corrosion resistance.
At present, with the development of micro-arc oxidation technology, the micro-arc oxidation technology is increasingly applied to the surface treatment of valve metals such as aluminum, magnesium, titanium and the like and alloys thereof, and the performance of a film layer is also increasingly improved. However, for most widely used steel, micro-arc oxidation is difficult to apply, mainly because the oxide produced by micro-arc oxidation on the surface of the steel cannot protect the substrate. Wenbin Yang adopts a composite electrolyte system combining sodium silicate and sodium dihydrogen phosphate, and aluminum nanoparticles are added, an oxide film protective layer is directly generated on the surface of Q235 steel through micro-arc oxidation, although the aluminum nanoparticles introduced by the electrolyte have a certain hole sealing effect on a micro-arc oxide film, the corrosion resistance of the film is still limited because the film contains more iron oxide (Wenbin Yang, Weimin Liu, zhen Jun Pen, et Al.
The prior art CN108193246A discloses a steel surface micro-arc oxidation method, which adopts an aluminum steel melting-brazing method to weld a layer of aluminum with high bonding strength on the surface of a steel matrix, and then utilizes a micro-arc oxidation technology to obtain a ceramic layer, so as to solve the problem that the direct coating on the steel surface is not firm, solve the problem of the bonding of a coating layer and the steel surface, and do not relate to the improvement of the corrosion resistance of the matrix by the related steel surface coating layer.
Disclosure of Invention
The invention aims to solve the problem that the existing oxide film generated by direct micro-arc oxidation on the surface of steel cannot well protect a matrix, and further provides a corrosion-resistant micro-arc oxide film layer on the surface of an aluminum-plated steel.
The invention also aims to provide a preparation method of the corrosion-resistant micro-arc oxidation film layer on the surface of the aluminum-plated steel.
It is still another object of the present invention to provide a method for manufacturing an aluminum plated steel product.
The above purpose of the invention is realized by the following technical scheme:
s1, preparing electrolyte: dissolving sodium hexametaphosphate, sodium silicate, sodium tungstate, disodium ethylene diamine tetraacetate, cerium dioxide and yttrium oxide in water, and uniformly stirring to obtain electrolyte;
s2, micro-arc oxidation treatment: and placing the electrolyte in an electrolytic bath to connect with a cathode, connecting the aluminum-plated steel with an anode, and carrying out electrolytic oxidation treatment to obtain the micro-arc oxidation film layer of the aluminum-plated steel.
According to the preparation method of the corrosion-resistant micro-arc oxidation film layer on the surface of the aluminum-plated steel, the micro-arc oxidation film coating technology is adopted, and after two rare earth elements, namely cerium and yttrium, are added into the electrolyte, the formed oxidation film layer has lower self-corrosion current density, and the corrosion resistance is obviously enhanced.
Preferably, the concentration of the cerium dioxide in S2 is 1.2-1.8 g/L, and the concentration of the yttrium oxide is 1.2-1.8 g/L.
Cerium dioxide and yttrium oxide with certain concentration can hinder the cathode reaction, and simultaneously, a metal oxide film containing cerium and yttrium is formed by arc discharge in the anode micro-arc oxidation process, so that the generated surface oxide film layer becomes smooth and compact, and the corrosion resistance of the obtained micro-arc oxide film layer is improved.
Further preferably, the concentration of the cerium dioxide in S2 is 1.5g/L, and the concentration of the yttrium oxide is 1.5 g/L.
Preferably, the concentration of the sodium hexametaphosphate in the S2 is 5-7 g/L, the concentration of the sodium silicate is 5-7 g/L, the concentration of the sodium tungstate is 2-4 g/L, and the concentration of the disodium ethylenediaminetetraacetate is 0.8-1.0 g/L.
The electrolyte prepared from the sodium salt in the concentration range has better uniformity and higher conductivity.
Preferably, the current density of the constant current electrolysis of S38～12A/dm3。
Too high current density can cause the electrolyte to generate heat, thereby influencing the uniformity of the solution, resulting in uneven coating, too low current density, slow coating formation and low efficiency.
Preferably, the electrolysis mode of S3 is constant current electrolysis.
The constant current density enables the micro-arc oxidation process to be carried out stably, and disturbance of electrolyte is not generated, so that membrane preparation is more uniform.
Preferably, the temperature of the electrolyte solution of S3 is 20-40 ℃.
Too high electrolyte temperature also influences the homogeneity of solution, leads to the coating film inhomogeneous, has the potential safety hazard simultaneously, and the temperature is crossed lowly and can increase power consumption.
Preferably, the micro-arc oxidation time of S3 is 30-45 min.
The oxidation time is enough to form a micro-arc oxidation film with enough thickness, the electric energy is excessively consumed due to too long time, and the film is excessively thin due to too short time.
The corrosion-resistant film layer prepared by the preparation method of the corrosion-resistant micro-arc oxidation film layer on the surface of the aluminum-plated steel is also within the protection scope of the invention.
The novel coated steel obtained by preparing the corrosion-resistant micro-arc oxidation film layer on the surface of the aluminum-plated steel by the preparation method is also within the protection scope of the invention.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a method for preparing a micro-arc oxidation film layer on the surface of an aluminum-plated steel product, which adopts a micro-arc oxidation film coating technology, two rare earth elements of cerium and yttrium are added into an electrolyte, so that the cathode reaction can be hindered, a metal oxidation film containing cerium and yttrium is formed at an anode, and simultaneously, the generated surface oxidation film layer can become smooth and compact, the formed oxidation film layer has lower self-corrosion current density, and the self-corrosion current density is as low as 10-7A·cm-2The corrosion resistance is obviously enhanced, and a steel substrate can be better protected.
Detailed Description
The present invention will be further described with reference to specific embodiments, but the present invention is not limited to the examples in any way. The starting reagents employed in the examples of the present invention are, unless otherwise specified, those that are conventionally purchased.
Example 1
A preparation method of a corrosion-resistant micro-arc oxidation film layer on the surface of an aluminum-plated steel material specifically comprises the following steps:
s1, pretreatment of aluminum-plated steel: placing the aluminized steel in acetone for ultrasonic cleaning for 5min, and then placing the aluminized steel in a constant-temperature drying oven for drying for later use, wherein the drying temperature is 75 ℃, and the drying time is 1 h;
s2, preparing electrolyte: the electrolyte is prepared from sodium hexametaphosphate, sodium silicate, sodium tungstate, disodium ethylene diamine tetraacetate, cerium dioxide, yttrium oxide and distilled water, wherein the concentration of the sodium hexametaphosphate is 5g/L, the concentration of the sodium silicate is 5g/L, the concentration of the sodium tungstate is 4g/L, the concentration of the disodium ethylene diamine tetraacetate is 1.0g/L, the concentration of the cerium dioxide is 1.8g/L and the concentration of the yttrium oxide is 1.2g/L, and the electrolyte is stirred by a mechanical stirrer at room temperature, the stirring speed is 1000rpm, and the time is 15 min;
s3, micro-arc oxidation treatment: and clamping the workpiece by using an aluminum clamp to ensure that the workpiece is completely immersed in the electrolyte, wherein the other end of the clamp is connected with a power supply anode, and a stainless steel electrolytic tank is used as a cathode. Adopting a single-pulse type micro-arc oxidation power supply, wherein the frequency is 500Hz, the pulse width is 80 mu s, and the oscillation time is 10 s; adopting a constant current mode and a current density of 8A/dm3And (3) oxidizing for 45min at the temperature of 20 ℃ at the micro-arc oxidation treatment time, washing the workpiece subjected to micro-arc oxidation treatment by using clear water, then performing ultrasonic treatment in absolute ethyl alcohol for 10min, and naturally drying to obtain the aluminum-plated steel micro-arc oxidation film layer.
Example 2
A preparation method of a corrosion-resistant micro-arc oxidation film layer on the surface of an aluminum-plated steel material specifically comprises the following steps:
s1, pretreatment of aluminum-plated steel: placing the aluminized steel in acetone for ultrasonic cleaning for 6min, and then placing the aluminized steel in a constant-temperature drying oven for drying for later use, wherein the drying temperature is 80 ℃, and the drying time is 1 h;
s2, preparing electrolyte: the electrolyte is prepared from sodium hexametaphosphate, sodium silicate, sodium tungstate, disodium ethylene diamine tetraacetate, cerium dioxide, yttrium oxide and distilled water, wherein the concentration of the sodium hexametaphosphate is 7g/L, the concentration of the sodium silicate is 7g/L, the concentration of the sodium tungstate is 2g/L, the concentration of the disodium ethylene diamine tetraacetate is 0.8g/L, the concentration of the cerium dioxide is 1.5g/L and the concentration of the yttrium oxide is 1.5g/L, and the electrolyte is stirred by a mechanical stirrer at room temperature, the stirring speed is 1500rpm, and the time is 20 min;
s3, micro-arc oxidation treatment: and clamping the workpiece by using an aluminum clamp to ensure that the workpiece is completely immersed in the electrolyte, wherein the other end of the clamp is connected with a power supply anode, and a stainless steel electrolytic tank is used as a cathode. Adopting a single-pulse type micro-arc oxidation power supply, wherein the frequency is 500Hz, the pulse width is 80 mu s, and the oscillation time is 10 s; the current density is 12A/dm in a constant current mode3And (3) oxidizing for 30min at the temperature of the electrolyte of 40 ℃, washing the workpiece subjected to micro-arc oxidation treatment by using clear water, then ultrasonically treating the workpiece in absolute ethyl alcohol for 15min, and naturally drying to obtain the aluminum-plated steel micro-arc oxidation film layer.
Example 3
A preparation method of a corrosion-resistant micro-arc oxidation film layer on the surface of an aluminum-plated steel material specifically comprises the following steps:
s1, pretreatment of aluminum-plated steel: placing the aluminized steel in acetone for ultrasonic cleaning for 6min, and then placing the aluminized steel in a constant-temperature drying oven for drying for later use, wherein the drying temperature is 85 ℃, and the drying time is 1 h;
s2, preparing electrolyte: the electrolyte is prepared from sodium hexametaphosphate, sodium silicate, sodium tungstate, disodium ethylene diamine tetraacetate, cerium dioxide, yttrium oxide and distilled water, wherein the concentration of the sodium hexametaphosphate is 6g/L, the concentration of the sodium silicate is 6g/L, the concentration of the sodium tungstate is 3g/L, the concentration of the disodium ethylene diamine tetraacetate is 0.9g/L, the concentration of the cerium dioxide is 1.2g/L and the concentration of the yttrium oxide is 1.8g/L, a single-pulse micro-arc oxidation power supply is adopted, the stirring speed is 1200rpm, and the time is 20 min;
s3, micro-arc oxidation treatment: and clamping the workpiece by using an aluminum clamp to ensure that the workpiece is completely immersed in the electrolyte, wherein the other end of the clamp is connected with a power supply anode, and a stainless steel electrolytic tank is used as a cathode. Adopting a single-pulse type micro-arc oxidation power supply, wherein the frequency is 500Hz, the pulse width is 80 mu s, and the oscillation time is 10 s; miningIn constant current mode, current density is 10A/dm3And oxidizing for 40min, keeping the temperature of the electrolyte at 30 ℃, washing the workpiece subjected to micro-arc oxidation treatment by using clear water, then carrying out ultrasonic treatment in absolute ethyl alcohol for 12min, and naturally drying to obtain the aluminum-plated steel micro-arc oxidation film layer.
Comparative example 1
A preparation method of a corrosion-resistant micro-arc oxidation film layer on the surface of an aluminum-plated steel material specifically comprises the following steps:
s1, pretreatment of aluminum-plated steel: placing the aluminized steel in acetone for ultrasonic cleaning for 6min, and then placing the aluminized steel in a constant-temperature drying oven for drying for later use, wherein the drying temperature is 85 ℃, and the drying time is 1 h;
s2, preparing electrolyte: the electrolyte is prepared from sodium hexametaphosphate, sodium silicate, sodium tungstate, disodium ethylene diamine tetraacetate, yttrium oxide and distilled water, wherein the concentration of the sodium hexametaphosphate is 6g/L, the concentration of the sodium silicate is 6g/L, the concentration of the sodium tungstate is 3g/L, the concentration of the disodium ethylene diamine tetraacetate is 0.9g/L, and the concentration of the yttrium oxide is 1.5g/L, a single-pulse micro-arc oxidation power supply is adopted, the stirring speed is 1200rpm, and the time is 20 min;
s3, micro-arc oxidation treatment: and clamping the workpiece by using an aluminum clamp to ensure that the workpiece is completely immersed in the electrolyte, wherein the other end of the clamp is connected with a power supply anode, and a stainless steel electrolytic tank is used as a cathode. Adopting a single-pulse type micro-arc oxidation power supply, wherein the frequency is 500Hz, the pulse width is 80 mu s, and the oscillation time is 10 s; adopting a constant current mode and a current density of 10A/dm3And oxidizing for 40min, keeping the temperature of the electrolyte at 30 ℃, washing the workpiece subjected to micro-arc oxidation treatment by using clear water, then carrying out ultrasonic treatment in absolute ethyl alcohol for 12min, and naturally drying to obtain the aluminum-plated steel micro-arc oxidation film layer.
Comparative example 2
A preparation method of a corrosion-resistant micro-arc oxidation film layer on the surface of an aluminum-plated steel material specifically comprises the following steps:
s1, pretreatment of aluminum-plated steel: placing the aluminized steel in acetone for ultrasonic cleaning for 6min, and then placing the aluminized steel in a constant-temperature drying oven for drying for later use, wherein the drying temperature is 85 ℃, and the drying time is 1 h;
s2, preparing electrolyte: the electrolyte is prepared from sodium hexametaphosphate, sodium silicate, sodium tungstate, disodium ethylene diamine tetraacetate, cerium dioxide and distilled water, wherein the concentration of the sodium hexametaphosphate is 6g/L, the concentration of the sodium silicate is 6g/L, the concentration of the sodium tungstate is 3g/L, the concentration of the disodium ethylene diamine tetraacetate is 0.9g/L, and the concentration of the cerium dioxide is 1.5 g/L. Adopting a single-pulse type micro-arc oxidation power supply, wherein the stirring speed is 1200rpm, and the time is 20 min;
s3, micro-arc oxidation treatment: clamping the workpiece by using an aluminum clamp to enable the workpiece to be completely immersed in the electrolyte, connecting the other end of the clamp with a power supply anode, using a stainless steel electrolytic tank as a cathode, and adopting a single-pulse type micro-arc oxidation power supply with the frequency of 500Hz, the pulse width of 80 mu s and the oscillation time of 10 s; adopting a constant current mode and a current density of 10A/dm3And oxidizing for 40min, keeping the temperature of the electrolyte at 30 ℃, washing the workpiece subjected to micro-arc oxidation treatment by using clear water, then carrying out ultrasonic treatment in absolute ethyl alcohol for 12min, and naturally drying to obtain the aluminum-plated steel micro-arc oxidation film layer.
Comparative example 3
A preparation method of a corrosion-resistant micro-arc oxidation film layer on the surface of an aluminum-plated steel material specifically comprises the following steps:
s1, pretreatment of aluminum-plated steel: placing the aluminized steel in acetone for ultrasonic cleaning for 6min, and then placing the aluminized steel in a constant-temperature drying oven for drying for later use, wherein the drying temperature is 85 ℃, and the drying time is 1 h;
s2, preparing electrolyte: the electrolyte is prepared from sodium hexametaphosphate, sodium silicate, sodium tungstate, disodium ethylene diamine tetraacetate and distilled water, wherein the concentration of the sodium hexametaphosphate is 6g/L, the concentration of the sodium silicate is 6g/L, the concentration of the sodium tungstate is 3g/L, the concentration of the disodium ethylene diamine tetraacetate is 0.9g/L, a single-pulse micro-arc oxidation power supply is adopted, the stirring speed is 1200rpm, and the time is 20 min;
s3, micro-arc oxidation treatment: and clamping the workpiece by using an aluminum clamp to ensure that the workpiece is completely immersed in the electrolyte, wherein the other end of the clamp is connected with a power supply anode, and a stainless steel electrolytic tank is used as a cathode. Adopting a single-pulse type micro-arc oxidation power supply, wherein the frequency is 500Hz, the pulse width is 80 mu s, and the oscillation time is 10 s; and (3) adopting a constant current mode, wherein the current density is 10A/dm3, the oxidation time is 40min, the temperature of the electrolyte is 30 ℃, washing the workpiece subjected to micro-arc oxidation treatment by using clear water, then carrying out ultrasonic treatment in absolute ethyl alcohol for 12min, and naturally drying to obtain the micro-arc oxidation film layer of the aluminum-plated steel.
Comparative example 4
A preparation method of a corrosion-resistant micro-arc oxidation film layer on the surface of an aluminum-plated steel material specifically comprises the following steps:
s1, pretreatment of aluminum-plated steel: placing the aluminized steel in acetone for ultrasonic cleaning for 6min, and then placing the aluminized steel in a constant-temperature drying oven for drying for later use, wherein the drying temperature is 85 ℃, and the drying time is 1 h;
s2, preparing electrolyte: the electrolyte is prepared from sodium hexametaphosphate, sodium silicate, sodium tungstate, disodium ethylene diamine tetraacetate, cerium dioxide, yttrium oxide and distilled water, wherein the concentration of the sodium hexametaphosphate is 6g/L, the concentration of the sodium silicate is 6g/L, the concentration of the sodium tungstate is 3g/L, the concentration of the disodium ethylene diamine tetraacetate is 0.9g/L, the concentration of the cerium dioxide is 2.1g/L and the concentration of the yttrium oxide is 2.4g/L, a single-pulse micro-arc oxidation power supply is adopted, the stirring speed is 1200rpm, and the time is 20 min;
s3, micro-arc oxidation treatment: clamping the workpiece by using an aluminum clamp to enable the workpiece to be completely immersed in the electrolyte, connecting the other end of the clamp with a power supply anode, using a stainless steel electrolytic tank as a cathode, and adopting a single-pulse type micro-arc oxidation power supply with the frequency of 500Hz, the pulse width of 80 mu s and the oscillation time of 10 s; adopting a constant current mode and a current density of 10A/dm3And oxidizing for 40min, keeping the temperature of the electrolyte at 30 ℃, washing the workpiece subjected to micro-arc oxidation treatment by using clear water, then carrying out ultrasonic treatment in absolute ethyl alcohol for 12min, and naturally drying to obtain the aluminum-plated steel micro-arc oxidation film layer. And (4) detecting a result:
electrochemical testing is carried out by using a CHI750C electrochemical workstation, a three-electrode system is adopted in the testing, a Pt electrode is an auxiliary electrode, a saturated calomel electrode is a reference electrode, and an electrolyte solution is 3.5% (mass fraction) NaCl solution. The scanning range of the polarization curve test is-0.9V to-0.35V, and the scanning speed is 5 mV/s. And (4) performing data analysis on the polarization curve test result by using CHI750C workstation with software to obtain corrosion current density (I)corr)。
Table 1 shows the electrochemical properties of the micro-arc oxidation film layers prepared in examples 1 to 3.
TABLE 1
| Serial number | Self-etching current density (A cm)-2) |
| Example 1 | 4.238×10-7 |
| Example 2 | 2.082×10-7 |
| Example 3 | 5.349×10-7 |
| Comparative example 1 | 9.453×10-6 |
| Comparative example 2 | 1.051×10-6 |
| Comparative example 3 | 1.578×10-6 |
| Comparative example 4 | 6.776×10-6 |
It can be seen from the examples in table 1 that the micro-arc oxide film layers obtained under the process conditions of the examples of the present invention all have good corrosion resistancePerformance, from corrosion current density as low as 10-7A·cm-2When the ceria and the yttria are absent or have concentrations beyond the range of the invention, the self-corrosion current density is reduced by 1 order of magnitude by combining the embodiments 1 to 3 and the comparative examples 1 to 4, and it can be obviously seen that the content of the invention effectively improves the corrosion resistance of the film layer.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The preparation method of the corrosion-resistant micro-arc oxidation film layer on the surface of the aluminum-plated steel is characterized by comprising the following steps of:
s1, preparing electrolyte: dissolving sodium hexametaphosphate, sodium silicate, sodium tungstate, disodium ethylene diamine tetraacetate, cerium dioxide and yttrium oxide in water to obtain electrolyte;
s2, micro-arc oxidation treatment: and placing the electrolyte in an electrolytic bath to connect with a cathode, connecting the aluminum-plated steel with an anode, and carrying out electrolytic oxidation treatment to obtain the micro-arc oxidation film layer of the aluminum-plated steel.
2. The method according to claim 1, wherein the concentration of cerium oxide in S2 is 1.2-1.8 g/L, and the concentration of yttrium oxide is 1.2-1.8 g/L.
3. The method according to claim 2, wherein the concentration of cerium oxide in S2 is 1.5g/L, and the concentration of yttrium oxide is 1.5 g/L.
4. The method according to claim 1, wherein the concentration of sodium hexametaphosphate in S2 is 5-7 g/L, the concentration of sodium silicate is 5-7 g/L, the concentration of sodium tungstate is 2-4 g/L, and the concentration of disodium ethylenediaminetetraacetate is 0.8-1.0 g/L.
5. The method according to claim 1, wherein the electrolysis current density of S3 is 8-12A/dm3。
6. The production method according to claim 5, wherein the electrolysis mode of S3 is constant current electrolysis.
7. The method according to claim 1, wherein the temperature of the electrolyte solution at S3 is 20-40 ℃.
8. The preparation method according to claim 1, wherein the micro-arc oxidation time of S3 is 30-45 min.
9. An aluminum-plated steel surface corrosion-resistant micro-arc oxidation film layer prepared by the preparation method of any one of claims 1 to 8.
10. A preparation method of an aluminized steel product, which is characterized by comprising the step of preparing a corrosion-resistant micro-arc oxidation film layer on the surface of the aluminized steel product by adopting the preparation method of the corrosion-resistant micro-arc oxidation film layer on the surface of the aluminized steel product according to any one of claims 1 to 8.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118064950A (en) * | 2024-04-25 | 2024-05-24 | 深圳市欣茂鑫实业有限公司 | Rare earth-based electrolytic coloring method, electrolyte and alloy product |
| CN118087000A (en) * | 2024-04-26 | 2024-05-28 | 诸暨市中俄联合材料实验室 | Micro-arc oxidation/thermoelectric chemical oxidation method of non-valve metal |
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| CN118087000A (en) * | 2024-04-26 | 2024-05-28 | 诸暨市中俄联合材料实验室 | Micro-arc oxidation/thermoelectric chemical oxidation method of non-valve metal |
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