CN112760692B - Aluminum alloy anodic oxidation sealing liquid and sealing method thereof - Google Patents
Aluminum alloy anodic oxidation sealing liquid and sealing method thereof Download PDFInfo
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Abstract
The invention provides an aluminum alloy anodic oxidation sealing liquid which comprises 6g/L-12g/L of silica sol, 60g/L-75g/L of polyurethane and 3g/L-6g/L of surfactant. According to the invention, through the interaction of the added nano silica sol, the polyurethane and the surfactant, the nano silica sol can reach the bottom of micropores formed by anodic oxidation along with the flow of the polyurethane, and the micropores are blocked from inside to outside, so that the sealing effect is remarkable; the preparation method of the sealing liquid is simple, the sealing liquid generates a cavitation effect under the action of ultrasonic waves, the intermolecular surface tension is reduced until the surface tension is balanced, the sealing liquid is more beneficial to being applied to the sealing process of aluminum alloy, and the sealing effect of aluminum alloy micropores is improved; in addition, the sealing liquid is simple to apply, the sealing method is stable, the sealing liquid has the advantages of safety and environmental protection under the condition of ensuring the sealing effect and the film thickness, and the corrosion resistance of the aluminum alloy anodic oxide film can be obviously improved.
Description
Technical Field
The invention relates to the technical field of oxide films of aluminum alloys, in particular to aluminum alloy anodic oxidation sealing liquid and a sealing method thereof.
Background
Aluminum or aluminum alloy is one of the metal materials which are the widest in use range and the largest in use amount, but the aluminum or aluminum alloy is easy to corrode in a humid environment, and the aluminum or aluminum alloy is often treated by anodic oxidation in industry to generate an anodic oxide film with a film thickness controllable porous structure, so that the corrosion resistance and the wear resistance of the aluminum or aluminum alloy are improved. However, the formed anodic oxide film with the honeycomb porous structure has high porosity and adsorptivity, so that the anodic oxide film is easy to pollute, and a corrosive medium is easy to adsorb to the pores of the film layer to corrode, so that the service life of aluminum or aluminum alloy is shortened. Therefore, in order to reduce the corrosion rate of aluminum or aluminum alloy and prolong the service life of the aluminum or aluminum alloy, the aluminum or aluminum alloy needs to be subjected to hole sealing treatment by using a hole sealing technology, so that the adsorption capacity of an oxide film is reduced, and the pollution resistance and the corrosion resistance of the oxide film are improved. At present, most of China adopts a hydration sealing and medium and normal temperature metal salt sealing mode to carry out surface treatment on common aluminum alloy, and when a workpiece is used in a corrosive environment, a bichromate sealing process is mainly adopted for carrying out protection treatment. However, the sealing method in the prior art has the problems of heavy energy consumption and heavy pollution of nickel salt and chromium salt, and the performance of the oxide film can be influenced by the thicker film formed by sealing.
In summary, the above problems still remain to be solved in the field of sealing of oxide films of aluminum alloys.
Disclosure of Invention
Based on this, in order to solve among the prior art that aluminium alloy anodic oxidation seals and has that the energy consumption is big, the pollution is heavy to and the oxide film thickness that forms can influence the problem of oxide film performance. The invention provides an aluminum alloy anodic oxidation sealing liquid and a sealing method thereof, and the specific technical scheme is as follows:
the aluminum alloy anodic oxidation sealing liquid comprises silica sol, polyurethane and a surfactant, wherein the concentration of the silica sol is 6-12 g/L; the concentration of the polyurethane is 60g/L-75 g/L; the concentration of the surfactant is 3g/L-6 g/L.
Preferably, the concentration of the silica sol is 10 g/L; the concentration of the polyurethane is 70 g/L; the concentration of the surfactant is 5 g/L.
Preferably, the aluminum alloy anodizing sealing solution takes deionized water as a solvent.
Preferably, the surfactant is a fatty acid methyl ester ethoxylate.
Preferably, the silica sol is a nano silica sol.
Preferably, the pH value of the aluminum alloy anodizing sealing liquid is 4.5-6.8.
In addition, the preparation method of the aluminum alloy anodic oxidation sealing liquid comprises the following steps:
adding deionized water with the required amount of 2/3 into a stirring kettle, preheating to 35-45 ℃, adding the silica sol, and continuously stirring for 1-3 h to obtain a mixture A;
adding the polyurethane, the surfactant and deionized water with the amount required by 1/3 into the mixture A, heating to 75-90 ℃ at the heating rate of 5 ℃/min, preserving the temperature, and continuously stirring for 25-40 min under the assistance of ultrasound to obtain a mixture B;
and adjusting the pH value of the mixture B to 4.5-6.8, and continuously stirring for 5-10 min to obtain the aluminum alloy anodic oxidation sealing liquid.
Preferably, the power of the ultrasonic assistance is 150W-350W.
And the method comprises the step of placing the aluminum alloy in the aluminum alloy anodic oxidation sealing liquid for sealing treatment for 35-45 s.
Preferably, the temperature of the aluminum alloy anodizing sealing liquid is 65-70 ℃.
The aluminum alloy anodic oxidation sealing liquid in the scheme has the advantages that the nano silica sol, the polyurethane and the surfactant are added to interact, so that the nano silica sol can reach the bottoms of micropores formed by anodic oxidation along with the flow of the polyurethane, and the micropores are blocked from inside to outside, and the sealing effect is remarkable; the preparation method of the sealing liquid is simple, the sealing liquid generates a cavitation effect under the action of ultrasonic waves, the intermolecular surface tension is reduced until the surface tension is balanced, the sealing liquid is more beneficial to being applied to the sealing process of aluminum alloy, and the sealing effect of aluminum alloy micropores is improved; in addition, the sealing liquid is simple to apply, the sealing method is stable, the sealing liquid has the advantages of safety and environmental protection under the condition of ensuring the sealing effect and the film thickness, and the corrosion resistance of the aluminum alloy anodic oxide film can be obviously improved.
Drawings
FIG. 1 is a graph showing the polarization curves of anodized films in 3.5% NaCl solution for different comparative test groups;
FIG. 2 is a schematic of Nyquist plots of the anodized films of the different comparative test groups in a 3.5% NaCl solution.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The aluminum alloy anodic oxidation sealing liquid in one embodiment of the invention comprises silica sol, polyurethane and a surfactant, wherein the concentration of the silica sol is 6-12 g/L; the concentration of the polyurethane is 60g/L-75 g/L; the concentration of the surfactant is 3g/L-6 g/L.
In one embodiment, the concentration of the silica sol is 10 g/L; the concentration of the polyurethane is 70 g/L; the concentration of the surfactant is 5 g/L.
In one embodiment, the aluminum alloy anodizing sealing solution takes deionized water as a solvent.
In one embodiment, the surfactant is a fatty acid methyl ester ethoxylate.
In one embodiment, the silica sol is a nano silica sol.
In one embodiment, the silica sol is an aqueous silica sol.
In one embodiment, the pH value of the aluminum alloy anodizing sealing liquid is 4.5-6.8.
In addition, the invention also provides a preparation method of the aluminum alloy anodic oxidation sealing liquid, which comprises the following steps:
adding deionized water with the required amount of 2/3 into a stirring kettle, preheating to 35-45 ℃, adding the silica sol, and continuously stirring for 1-3 h to obtain a mixture A;
adding the polyurethane, the surfactant and deionized water with the amount required by 1/3 into the mixture A, heating to 75-90 ℃ at the heating rate of 5 ℃/min, preserving the temperature, and continuously stirring for 25-40 min under the assistance of ultrasound to obtain a mixture B;
and adjusting the pH value of the mixture B to 4.5-6.8, and continuously stirring for 5-10 min to obtain the aluminum alloy anodic oxidation sealing liquid.
In one embodiment, the power of the ultrasonic assistance is 150W-350W.
In one embodiment, the pH of mixture B is adjusted using an acidic adjusting agent.
In one embodiment, the invention also provides a sealing method of the aluminum alloy anodizing sealing liquid, which comprises the step of placing an aluminum alloy in the aluminum alloy anodizing sealing liquid for 35s-45s to carry out sealing treatment.
In one embodiment, the aluminum alloy anodizing sealing liquid has a temperature of 65-70 ℃.
The aluminum alloy anodic oxidation sealing liquid in the scheme has the advantages that the nano silica sol, the polyurethane and the surfactant are added to interact, so that the nano silica sol can reach the bottoms of micropores formed by anodic oxidation along with the flow of the polyurethane, and the micropores are blocked from inside to outside, and the sealing effect is remarkable; the preparation method of the sealing liquid is simple, the sealing liquid generates a cavitation effect under the action of ultrasonic waves, the intermolecular surface tension is reduced until the surface tension is balanced, the sealing liquid is more beneficial to being applied to the sealing process of aluminum alloy, and the sealing effect of aluminum alloy micropores is improved; in addition, the sealing liquid is simple to apply, the sealing method is stable, the sealing liquid has the advantages of safety and environmental protection under the condition of ensuring the sealing effect and the film thickness, and the corrosion resistance of the aluminum alloy anodic oxide film can be obviously improved.
Embodiments of the present invention will be described in detail below with reference to specific examples.
Example 1:
a sealing method of aluminum alloy anodic oxidation sealing liquid comprises the following steps:
adding 0.67L of deionized water into a stirring kettle, preheating to 35 ℃, adding 6g of nano silica sol, and continuously stirring for 1h to obtain a mixture A;
adding 60g of polyurethane, 3g of fatty acid methyl ester ethoxylate and 0.33L of deionized water into the mixture A, heating to 75 ℃ at the heating speed of 5 ℃/min, preserving heat, and continuously stirring for 25min under the assistance of ultrasonic waves with the power of 150W to obtain a mixture B;
adjusting the pH value of the mixture B to 4.5 by using an acidic regulator, and continuously stirring for 5min to obtain an aluminum alloy anodic oxidation sealing liquid for later use;
after 2024 aluminum alloy is selected to carry out the treatment steps of chemical degreasing → hot water washing → cold water washing → alkali etching → deionized water washing → bright light → deionized water washing, the 2024 aluminum alloy is placed in 180g/L sulfuric acid solution, the 2024 aluminum alloy is taken as an anode, the aluminum plate is taken as a cathode, and the current density is 1.25A/dm2And (3) carrying out sulfuric acid anodic oxidation for 30min, cleaning with deionized water again, placing the 2024 aluminum alloy in an aluminum alloy anodic oxidation sealing solution at the temperature of 65 ℃ for sealing treatment for 35s, and taking out the sealed 2024 aluminum alloy.
Example 2:
a sealing method of aluminum alloy anodic oxidation sealing liquid comprises the following steps:
adding 0.67L of deionized water into a stirring kettle, preheating to 45 ℃, adding 12g of nano silica sol, and continuously stirring for 3 hours to obtain a mixture A;
adding 75g of polyurethane, 6g of fatty acid methyl ester ethoxylate and 0.33L of deionized water into the mixture A, heating to 90 ℃ at a heating speed of 5 ℃/min, preserving heat, and continuously stirring for 40min under the assistance of ultrasound with the power of 350W to obtain a mixture B;
adjusting the pH value of the mixture B to 6.8 by using an acidic regulator, and continuously stirring for 10min to obtain an aluminum alloy anodic oxidation sealing liquid for later use;
after 2024 aluminum alloy is selected to carry out the treatment steps of chemical degreasing → hot water washing → cold water washing → alkali etching → deionized water washing → bright light → deionized water washing, the 2024 aluminum alloy is placed in 180g/L sulfuric acid solution, the 2024 aluminum alloy is taken as an anode, the aluminum plate is taken as a cathode, and the current density is 1.25A/dm2And (3) carrying out sulfuric acid anodic oxidation for 30min, cleaning with deionized water again, placing the 2024 aluminum alloy in an aluminum alloy anodic oxidation sealing solution at the temperature of 70 ℃ for sealing treatment for 45s, and taking out the sealed 2024 aluminum alloy.
Example 3:
a sealing method of aluminum alloy anodic oxidation sealing liquid comprises the following steps:
adding 0.67L of deionized water into a stirring kettle, preheating to 40 ℃, adding 10g of nano silica sol, and continuously stirring for 2 hours to obtain a mixture A;
adding 70g of polyurethane, 5g of fatty acid methyl ester ethoxylate and 0.33L of deionized water into the mixture A, heating to 85 ℃ at the heating speed of 5 ℃/min, preserving heat, and continuously stirring for 30min under the assistance of ultrasound with the power of 200W to obtain a mixture B;
adjusting the pH value of the mixture B to 5.2 by using an acidic regulator, and continuously stirring for 8min to obtain an aluminum alloy anodic oxidation sealing liquid for later use;
after 2024 aluminum alloy is selected to carry out the treatment steps of chemical degreasing → hot water washing → cold water washing → alkali etching → deionized water washing → bright light → deionized water washing, the 2024 aluminum alloy is placed in 180g/L sulfuric acid solution, the 2024 aluminum alloy is taken as an anode, the aluminum plate is taken as a cathode, and the current density is 1.25A/dm2And (3) carrying out sulfuric acid anodic oxidation for 30min, cleaning with deionized water again, placing the 2024 aluminum alloy in aluminum alloy anodic oxidation sealing liquid at the temperature of 68 ℃ for sealing treatment for 40s, and taking out the sealed 2024 aluminum alloy.
Example 4:
a sealing method of aluminum alloy anodic oxidation sealing liquid comprises the following steps:
adding 0.67L of deionized water into a stirring kettle, preheating to 42 ℃, adding 8g of nano silica sol, and continuously stirring for 3 hours to obtain a mixture A;
adding 72g of polyurethane, 4g of fatty acid methyl ester ethoxylate and 0.33L of deionized water into the mixture A, heating to 85 ℃ at a heating rate of 5 ℃/min, preserving heat, and continuously stirring for 35min under the assistance of ultrasound with the power of 300W to obtain a mixture B;
adjusting the pH value of the mixture B to 6.8 by using an acidic regulator, and continuously stirring for 9min to obtain an aluminum alloy anodic oxidation sealing liquid for later use;
after 2024 aluminum alloy is selected to carry out the treatment steps of chemical degreasing → hot water washing → cold water washing → alkali etching → deionized water washing → bright light → deionized water washing, the 2024 aluminum alloy is placed in 180g/L sulfuric acid solution, the 2024 aluminum alloy is taken as an anode, the aluminum plate is taken as a cathode, and the current density is 1.25A/dm2And (3) carrying out sulfuric acid anodic oxidation for 30min, cleaning with deionized water again, placing the 2024 aluminum alloy in an aluminum alloy anodic oxidation sealing solution at the temperature of 70 ℃ for sealing treatment for 42s, and taking out the sealed 2024 aluminum alloy.
Comparative example 1:
a sealing method of aluminum alloy anodic oxidation sealing liquid comprises the following steps:
sequentially adding 10g of nano silica sol, 70g of polyurethane and 5g of fatty acid methyl ester ethoxylate into 1L of deionized water, and uniformly stirring to obtain a mixture A;
adjusting the pH value of the mixture A to 5.2 by using an acidic regulator, and continuously stirring for 8min to obtain an aluminum alloy anodic oxidation sealing liquid for later use;
after 2024 aluminum alloy is selected to carry out the treatment steps of chemical degreasing → hot water washing → cold water washing → alkali etching → deionized water washing → bright light → deionized water washing, the 2024 aluminum alloy is placed in 180g/L sulfuric acid solution, the 2024 aluminum alloy is taken as an anode, the aluminum plate is taken as a cathode, and the current density is 1.25A/dm2And (3) carrying out sulfuric acid anodic oxidation for 30min, cleaning with deionized water again, placing the 2024 aluminum alloy in aluminum alloy anodic oxidation sealing liquid at the temperature of 68 ℃ for sealing treatment for 40s, and taking out the sealed 2024 aluminum alloy.
Comparative example 2:
a sealing method of aluminum alloy anodic oxidation sealing liquid comprises the following steps:
adding 0.67L of deionized water into a stirring kettle, preheating to 40 ℃, adding 10g of nano silica sol, and continuously stirring for 2 hours to obtain a mixture A;
adding 70g of polyurethane and 0.33L of deionized water into the mixture A, heating to 85 ℃ at the heating rate of 5 ℃/min, preserving heat, and continuously stirring for 30min under the assistance of ultrasonic with the power of 200W to obtain a mixture B;
adjusting the pH value of the mixture B to 5.2 by using an acidic regulator, and continuously stirring for 8min to obtain an aluminum alloy anodic oxidation sealing liquid for later use;
after 2024 aluminum alloy is selected to carry out the treatment steps of chemical degreasing → hot water washing → cold water washing → alkali etching → deionized water washing → bright light → deionized water washing, the 2024 aluminum alloy is placed in 180g/L sulfuric acid solution, the 2024 aluminum alloy is taken as an anode, the aluminum plate is taken as a cathode, and the current density is 1.25A/dm2And (3) carrying out sulfuric acid anodic oxidation for 30min, cleaning with deionized water again, placing the 2024 aluminum alloy in aluminum alloy anodic oxidation sealing liquid at the temperature of 68 ℃ for sealing treatment for 40s, and taking out the sealed 2024 aluminum alloy.
Comparative example 3:
a sealing method of aluminum alloy anodic oxidation sealing liquid comprises the following steps:
adding 0.67L of deionized water into a stirring kettle, preheating to 40 ℃, adding 10g of nano silica sol, and continuously stirring for 2 hours to obtain a mixture A;
adding 5g of fatty acid methyl ester ethoxylate and 0.33L of deionized water into the mixture A, heating to 85 ℃ at a heating rate of 5 ℃/min, keeping the temperature, and continuously stirring for 30min under the assistance of 200W ultrasound to obtain a mixture B;
adjusting the pH value of the mixture B to 5.2 by using an acidic regulator, and continuously stirring for 8min to obtain an aluminum alloy anodic oxidation sealing liquid for later use;
selecting 2024 aluminum alloy to carry out the treatment steps of chemical degreasing → hot water washing → cold water washing → alkaline etching → deionized water washing → light emitting → deionized water washingThen, the 2024 aluminum alloy was placed in a 180g/L sulfuric acid solution at a current density of 1.25A/dm using the 2024 aluminum alloy as an anode and an aluminum plate as a cathode2And (3) carrying out sulfuric acid anodic oxidation for 30min, cleaning with deionized water again, placing the 2024 aluminum alloy in aluminum alloy anodic oxidation sealing liquid at the temperature of 68 ℃ for sealing treatment for 40s, and taking out the sealed 2024 aluminum alloy.
The first test example: corrosion resistance
The 2024 aluminum alloy subjected to the sealing treatment of examples 1 to 4 and the 2024 aluminum alloy subjected to the sealing treatment of comparative examples 1 to 3 were placed in 3.5% by mass NaCl solutions, respectively, while the 2024 aluminum alloy not subjected to the sealing treatment was used as a blank, and the relevant indexes were measured, and the results are shown in table 1 below.
Table 1:
as can be seen from the data analysis in table 1, the self-corrosion potential of the 2024 aluminum alloy in examples 1 to 4 after being subjected to the sealing treatment with the aluminum alloy anodizing sealing solution is more biased to the positive potential, and compared with the blank control line, the self-corrosion current density of the 2024 aluminum alloy in examples 1 to 4 after being subjected to the sealing treatment with the aluminum alloy anodizing sealing solution is significantly lower than that of the blank control line, which illustrates the synergistic effect of the sealing solution in the present invention, so that the 2024 aluminum alloy after being subjected to the aluminum alloy anodizing sealing solution has significant corrosion resistance. In addition, the analysis in conjunction with fig. 1 also makes it clear that: the aluminum alloy anodic oxidation sealing liquid disclosed by the invention has an excellent sealing effect and is beneficial to improving the corrosion resistance of aluminum alloy.
Test example two: wear resistance
The 2024 aluminum alloys subjected to the sealing treatment of examples 1 to 4 and the 2024 aluminum alloys subjected to the sealing treatment of comparative examples 1 to 3 were each sanded for 20 minutes using an apparatus of an HSR-2M type high-speed reciprocating friction abrasion tester. The parameters are adjusted to load 10N, the test time is 10min, the running speed is 500t/m, the reciprocating length is 3mm, the specification of the load sensor is 200N, the measurement mode is reciprocating friction, and the test results are shown in Table 2.
Table 2:
the data analysis in table 2 shows that the aluminum alloy treated by the aluminum alloy anodic oxidation sealing liquid of the invention has excellent wear resistance and can effectively reduce the wear loss of the surface of the aluminum alloy, and the aluminum alloy anodic oxidation sealing liquid in the comparative example 1 does not have the ultrasonic auxiliary effect in the preparation process, and the intermolecular acting force influences the aluminum alloy anodic oxidation sealing liquid to ensure that the aluminum alloy anodic oxidation sealing liquid cannot achieve more excellent sealing effect; the components of the aluminum alloy anodizing sealant fluid in comparative example 2 and comparative example 3 are different from those in examples 1 to 4, but the sealing effect of the obtained aluminum alloy anodizing sealant fluid is not as good as that of the aluminum alloy anodizing sealant fluid in examples 1 to 4, which shows that the aluminum alloy anodizing sealant fluid has a synergistic effect, and is helpful for improving the sealing effect and further improving the wear resistance of the surface of the aluminum alloy.
In addition, the following tests were also performed to examine the influence of temperature on the sealing effect, and the test conditions and test results are shown in table 3.
The test method comprises the following steps: after 2024 aluminum alloy is selected to carry out the treatment steps of chemical degreasing → hot water washing → cold water washing → alkali etching → deionized water washing → bright light → deionized water washing, the 2024 aluminum alloy is placed in 180g/L sulfuric acid solution, the 2024 aluminum alloy is taken as an anode, the aluminum plate is taken as a cathode, and the current density is 1.25A/dm2And (3) carrying out sulfuric acid anodic oxidation for 30min, cleaning with deionized water again, and then placing 2024 aluminum alloy in the aluminum alloy anodic oxidation sealing liquid prepared in the example 4 for sealing treatment.
Table 3:
the results in table 3 were obtained by subjective analysis, and it can be seen from the data analysis in table 3 that the sealing treatment of the present invention at a temperature of 65 ℃ to 70 ℃ for 35s to 45s has an excellent sealing effect, and the sealing treatment also has the advantages of short time and low energy consumption.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
For comparison, different comparative test groups are also set, including an anodic oxidation unclosed test group, a boiling water blocked test group, a nickel acetate test group, a potassium dichromate blocked group, and an aqueous silica sol blocked group (the aqueous silica sol is specifically a nano silica sol, namely the aluminum alloy anodic oxidation blocking solution in example 1 is subjected to blocking treatment), and the specific results are shown in fig. 1 and fig. 2, and it can be seen from the analysis in fig. 1 that the blocking treatment by using the aqueous silica sol has an excellent blocking effect.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. The aluminum alloy anodic oxidation sealing liquid is characterized by comprising components of silica sol, polyurethane and a surfactant, wherein the concentration of the silica sol is 6-12 g/L; the concentration of the polyurethane is 60g/L-75 g/L; the concentration of the surfactant is 3g/L-6 g/L;
the preparation method of the aluminum alloy anodic oxidation sealing liquid comprises the following steps:
adding deionized water with the required amount of 2/3 into a stirring kettle, preheating to 35-45 ℃, adding the silica sol, and continuously stirring for 1-3 h to obtain a mixture A;
adding the polyurethane, the surfactant and deionized water with the amount required by 1/3 into the mixture A, heating to 75-90 ℃ at the heating rate of 5 ℃/min, preserving the temperature, and continuously stirring for 25-40 min under the assistance of ultrasound to obtain a mixture B;
adjusting the pH value of the mixture B to 4.5-6.8, and continuously stirring for 5-10 min to obtain aluminum alloy anodic oxidation sealing liquid;
the sealing method of the aluminum alloy anodic oxidation sealing liquid comprises the step of placing an aluminum alloy in the aluminum alloy anodic oxidation sealing liquid for sealing treatment for 35-45 s, wherein the temperature of the aluminum alloy anodic oxidation sealing liquid is 65-70 ℃.
2. The aluminum alloy anodizing sealing liquid according to claim 1, wherein the concentration of the silica sol is 10 g/L; the concentration of the polyurethane is 70 g/L; the concentration of the surfactant is 5 g/L.
3. The aluminum alloy anodizing sealant solution of claim 1, wherein deionized water is used as a solvent.
4. The aluminum alloy anodizing sealant fluid of claim 3, wherein said surfactant is a fatty acid methyl ester ethoxylate.
5. The aluminum alloy anodizing sealing liquid according to claim 4, wherein the silica sol is a nano silica sol.
6. The aluminum alloy anodizing sealant fluid of claim 5, wherein the pH of the aluminum alloy anodizing sealant fluid is 4.5-6.8.
7. The aluminum alloy anodizing sealing liquid according to claim 1, wherein the power of the ultrasonic assistance is 150-350W.
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| CN205885512U (en) * | 2016-04-20 | 2017-01-18 | 深圳市龙岗区骨科医院 | Medical rivet |
| CN105970268A (en) * | 2016-07-28 | 2016-09-28 | 关亚玲 | Treatment method for aluminum alloy surface anodic oxidation-hole sealing |
| WO2020217694A1 (en) * | 2019-04-25 | 2020-10-29 | 栗田工業株式会社 | Sealing treatment method for anodized surface of aluminum or aluminum alloy |
| CN110965099A (en) * | 2019-12-31 | 2020-04-07 | 苏州市科渠金属制品有限公司 | Aluminum alloy mirror surface anodic oxidation method |
| CN111206275A (en) * | 2020-02-17 | 2020-05-29 | 王勇 | Strong acid and strong basicity resistant hole sealing treatment method for aluminum alloy anodic oxide film |
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