CN114517320A - Surface passivation treatment process for aluminum alloy template - Google Patents

Surface passivation treatment process for aluminum alloy template Download PDF

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CN114517320A
CN114517320A CN202111678563.2A CN202111678563A CN114517320A CN 114517320 A CN114517320 A CN 114517320A CN 202111678563 A CN202111678563 A CN 202111678563A CN 114517320 A CN114517320 A CN 114517320A
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aluminum alloy
alloy template
passivation
solution
mass concentration
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唐华强
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Chongqing Xinjiurong Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
    • C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F3/00—Brightening metals by chemical means
    • C23F3/02—Light metals
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/16—Pretreatment, e.g. desmutting

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • ing And Chemical Polishing (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

The invention relates to the technical field of building templates and discloses a surface passivation treatment process for an aluminum alloy template, which comprises the steps of grinding, polishing and cleaning the aluminum alloy template; carrying out laser drilling on the construction surface of the aluminum alloy template; placing the aluminum alloy template in sodium hydroxide and Na3PO4Soaking in the mixed solution; immersing the construction surface of the aluminum alloy template into passivation solution, performing composite anodic oxidation for 50-80min under the voltage of 110-220V, washing with deionized water, and drying to obtain an anodic oxidation aluminum alloy template; the passivation solution comprises fluozirconic acid, silicon tetrafluoride, urea, carboxymethyl cellulose and polytetrafluoroethylene emulsion, and the solvent of the passivation solution is ethanol solution with the mass concentration of 10-30%; and (3) placing the anodic aluminum oxide alloy template into deionized water for soaking treatment, and then taking out and airing. The invention can be applied to aluminumA layer of uniform and compact passivation film is formed on the construction surface of the alloy template, so that the alloy template has good corrosion resistance and high hardness, and the passivation film layer is prevented from being damaged in rubbing.

Description

Surface passivation treatment process for aluminum alloy template
Technical Field
The invention relates to the technical field of building templates, in particular to a surface passivation treatment process for an aluminum alloy template.
Background
The aluminum alloy template is a new generation template system following a plywood template, a combined steel template system, a steel frame wood (bamboo) plywood system, a large template system and an early-dismantling template system. The aluminum alloy template is a template which is made of aluminum alloy sections as main materials through processes of machining, welding and the like and is suitable for concrete engineering. The formwork mainly comprises three parts, namely an aluminum panel, a bracket and a connecting piece, has complete and matched universal accessories, can be combined and spliced into an integral formwork with different sizes and complicated external dimensions, is an assembled and industrialized construction system formwork, and greatly improves the construction efficiency.
Because the aluminum alloy template is mainly made of aluminum, the chemical property of the aluminum is more active, a layer of extremely thin oxide film is easily formed on the surface of the aluminum alloy template in the atmospheric environment, the thickness of the aluminum alloy template is usually a few nanometers, and the aluminum alloy template has a certain protection effect on a substrate, but the natural oxide film is too thin and is extremely easy to damage, particularly in the alkaline environment, OH (OH)-When the content is high, corrosion is easy to occur, and pitted surfaces and bubbles are generated on the surface of concrete. The pH value of slurry in the concrete is generally about 12.5, and the aluminum alloy template is corroded due to chemical reaction under the alkaline condition, so that the service life of the aluminum alloy template is shortened. Therefore, in order to prolong the service life of the aluminum alloy template and improve the economic benefit, the aluminum alloy template is subjected to necessary surface passivation treatment before use. The patent with the application number of CN201911364232.4 discloses a surface-passivated aluminum alloy template and a preparation method thereof, wherein the surface-passivated aluminum alloy template comprises an aluminum alloy substrate and a passivation film on the surface of the aluminum alloy substrate, the passivation film is obtained by acting a passivation film-forming solution on the surface of the aluminum alloy substrate, and the passivation film-forming solution comprises the following raw materials: the preparation method comprises the following steps of: surface treatment, passivation treatment and sealing treatment of the aluminum alloy substrate.
Although the technical scheme forms a layer of uniform and dense passive film on the surface of the aluminum alloy template, the passive film has good corrosion resistance, according to the use feedback of a construction site, when the aluminum alloy template is used in the construction site, the situation that the template and the template or other hard objects are rubbed and collided can be avoided, the layer of passive film is easy to be damaged due to rubbing and collision in the rubbing and collision process, the damaged area is corroded by strong-alkaline concrete in the construction process, and the service life of the aluminum alloy template can be influenced to a certain extent.
Disclosure of Invention
In view of the above, the present invention provides a passivation treatment process for an aluminum alloy template surface, which can form a uniform and dense passivation film on a construction surface of the aluminum alloy template, and has good corrosion resistance and high hardness, so as to prevent the passivation film from being damaged by rubbing.
The invention solves the technical problems by the following technical means:
a surface passivation treatment process of an aluminum alloy template comprises the following steps,
s1, grinding and polishing the aluminum alloy template, and then cleaning;
s2, performing laser drilling on the construction surface of the aluminum alloy template by adopting a nanosecond laser;
s3, placing the aluminum alloy template in sodium hydroxide and Na3PO4Soaking in the mixed solution;
s4, immersing the construction surface of the aluminum alloy template into passivation solution, performing composite anodic oxidation for 50-80min under the voltage of 110-220V, washing with deionized water, and drying to obtain an anodic oxidation aluminum alloy template; the passivation solution comprises fluozirconic acid, silicon tetrafluoride, urea, carboxymethyl cellulose and polytetrafluoroethylene emulsion, and the solvent of the passivation solution is an ethanol solution with the mass concentration of 10-30%;
s5, placing the anodic aluminum oxide alloy template into deionized water for soaking treatment, and then taking out and airing.
Further, when the aluminum alloy template is polished in the step S1, the construction surface of the aluminum alloy template is immersed into the polishing solution with the temperature of 80-90 ℃ for polishing for 15-20S, and then the construction surface of the aluminum alloy template is washed by deionized water, wherein the polishing solution comprises 250-350g/L NaOH and 80-120g/L NaNO215-25g/L NaF and 15-25g/L Na3PO4. The aluminum alloy template construction surface after polishing is smooth and flat, and the post laser drilling and the post passive film forming uniformity are facilitated.
Further, when the laser drilling is performed on the construction surface of the aluminum alloy template in the step S2, the construction surface of the aluminum alloy template is immersed in deionized water, then laser drilling is performed by using a nanosecond laser, wherein the pulse width of the laser is 5-7ns, the wavelength is 1064nm, the power is 3-5W, the repetition frequency is 10kHz, the depth of the aluminum alloy template construction surface immersed in the water surface is 15-30mm, and the aluminum alloy template construction surface is washed clean by the deionized water and then dried after being processed. Therefore, nanosecond laser drilling is carried out on the construction surface of the aluminum alloy template, the construction surface of the aluminum alloy template is provided with shallow and tiny micropores which cannot be seen by naked eyes basically, the flatness of the construction surface of the aluminum alloy template cannot be influenced, the existence of the micropores can increase the thickness of a formed passivation film, and partial silicon dioxide and polytetrafluoroethylene can be filled.
Further, in the step S3, the mass concentration of the sodium hydroxide is 200-300g/L, and the Na is3PO4The concentration of the active ingredients is 50-80g/L, and the soaking time is 15-20 min. Using sodium hydroxide and Na3PO4And cleaning the aluminum alloy template.
Further, in the step S4, before passivation, the aluminum alloy template is heated to 120-150 ℃, the temperature of the passivation solution is maintained at 50-70 ℃, and oxygen is introduced into the passivation solution during passivation. Before soaking, the temperature of the aluminum alloy template is heated to 120-150 ℃, when the aluminum alloy template is passivated by using passivation solution, the heated aluminum alloy has higher activity, so that the passivation efficiency of the aluminum alloy template can be improved, the passivation thickness of a passivation film of the aluminum alloy template can also be improved, and oxygen can be introduced to oxidize more silicon ions during anodic oxidation to form a silicon dioxide film in micropores of the passivation film to fill the micropores of the passivation film.
Further, in the step S4, the mass concentration of fluozirconic acid in the passivation solution is 20 to 30g/L, the mass concentration of silicon tetrafluoride is 5 to 8g/L, the mass concentration of urea is 8 to 12g/L, the mass concentration of carboxymethyl cellulose is 3 to 5g/L, the mass concentration of polytetrafluoroethylene emulsion is 1 to 2g/L, and the solvent of the passivation solution is an ethanol solution with the mass concentration of 10 to 30%.
Further, in the step S4, the mass concentration of fluozirconic acid in the passivation solution is 25g/L, the mass concentration of silicon tetrafluoride is 6.5g/L, the mass concentration of urea is 10g/L, the mass concentration of carboxymethyl cellulose is 4g/L, the mass concentration of polytetrafluoroethylene emulsion is 1.5g/L, and the solvent of the passivation solution is an ethanol solution with the mass concentration of 20%.
Further, the temperature of the deionized water in the step S5 is 92-96 ℃, and the treatment time in the deionized water is 10-15 min. After the passivation film is treated in high-temperature deionized water at 92-96 ℃, the passivation film can expand, so that film holes in the passivation film contract inwards, silicon dioxide and polytetrafluoroethylene particles are tightly sealed in the film holes, the passivation film, the silicon dioxide and the polytetrafluoroethylene can be more compact, the film holes in the passivation film are sealed, impurities are prevented from entering the film holes to damage the passivation film, and the density and the strength of the passivation film can be increased more.
Further, in the step S4, when the aluminum alloy template is passivated, the passivation solution is subjected to ultrasonic oscillation by using ultrasonic waves, and the frequency of the ultrasonic waves is 30 to 40 KHz. The ultrasonic vibration can accelerate the tiny particles in the polytetrafluoroethylene emulsion to enter the micropores of the passivation film.
The invention has the beneficial effects that:
when the passivation film is formed by passivating the construction surface of the aluminum alloy template, the passivation film is formed by taking fluozirconic acid as a main material, the urea as an organic additive can improve the film forming speed, shorten the film forming time and enhance the corrosion resistance of the passivation film, and the added carboxymethyl cellulose and the urea have a synergistic effect, so that the flatness of the passivation film can be higher in the process of quickly forming the passivation film; when the passivation film is formed, because the passivation film has a large number of passivation film micropores on the microcosmic surface, when anodic oxidation is carried out, silicon ions hydrolyzed by silicon tetrafluoride in ethanol can be deposited in the micropores of the passivation film, and under the oxidation of oxygen, a plurality of silicon dioxide particles are filled in the micropores, and polytetrafluoroethylene emulsion can also be deposited in the micropores of the passivation film; silica and polytetrafluoroethylene particle enter into the micropore of passive film, then use hot water to soak, the passive film can expand in soaking, thereby make the inside shrink of diaphragm orifice on the passive film, with the tight seal of silica and polytetrafluoroethylene particle in the diaphragm orifice of passive film, make passive film and silica, polytetrafluoroethylene can be inseparabler, not only make the diaphragm orifice of passive film sealed, avoid other impurity to get into the diaphragm orifice and cause the damage to the passive film, also can be more increase the density and the intensity of passive film, thereby not only make the construction face of aluminum alloy template have good corrosion resistance, still have stronger hardness, avoid damaging the passive film in wiping, the life of extension aluminum alloy template.
Detailed Description
The present invention will be described in detail with reference to examples below:
examples 1,
The surface passivation treatment process for the aluminum alloy template comprises the following steps of:
s1, grinding the aluminum alloy template to be flat, then immersing the construction surface of the aluminum alloy template into polishing solution with the temperature of 80 ℃ for polishing for 15S, and washing the construction surface of the aluminum alloy template clean by using deionized water, wherein the polishing solution comprises 250g/L NaOH and 80g/L NaNO215g/L NaF and 15g/L Na3PO4；
S2, performing laser drilling on the construction surface of the aluminum alloy template by adopting a nanosecond laser, immersing the construction surface of the aluminum alloy template into deionized water during laser drilling, and then performing laser drilling by utilizing the nanosecond laser, wherein the pulse width of laser is 5ns, the wavelength is 1064nm, the power is 3W, the repetition frequency is 10kHz, the depth of the aluminum alloy template construction surface immersed into the water surface is 15mm, and the aluminum alloy template construction surface is washed clean by deionized water and then dried after being processed;
s3, placing the aluminum alloy template in sodium hydroxide and Na3PO4The mixed solution of (1) is soaked, the mass concentration of the sodium hydroxide is 200g/L, and the Na is3PO4The concentration of the raw materials is 50g/L, and the soaking time is 15 min;
s4, heating the aluminum alloy template to 120 ℃, immersing the construction surface of the aluminum alloy template into a passivation solution, performing composite anodic oxidation for 50min under the voltage of 110V, keeping the temperature of the passivation solution at 50 ℃ during passivation, introducing oxygen into the passivation solution during passivation, performing ultrasonic oscillation on the passivation solution by using ultrasonic waves, wherein the frequency of the ultrasonic waves is 30KHz, washing with deionized water, and drying to obtain an anodized aluminum alloy template; the passivation solution comprises a mixed solution composed of fluozirconic acid, silicon tetrafluoride, urea, carboxymethyl cellulose and polytetrafluoroethylene emulsion, the mass concentration of the fluozirconic acid in the passivation solution is 20g/L, the mass concentration of the silicon tetrafluoride is 5g/L, the mass concentration of the urea is 8g/L, the mass concentration of the carboxymethyl cellulose is 3g/L, the mass concentration of the polytetrafluoroethylene emulsion is 1g/L, and the solvent of the passivation solution is an ethanol solution with the mass concentration of 10%;
and S5, placing the anodized aluminum alloy template into deionized water for soaking treatment, taking out and airing, wherein the temperature of the deionized water is 92 ℃, and the treatment time in the deionized water is 10 min.
Examples 2,
The surface passivation treatment process for the aluminum alloy template comprises the following steps of:
s1, grinding the aluminum alloy template to be flat, then immersing the construction surface of the aluminum alloy template into polishing solution with the temperature of 85 ℃ for polishing for 18S, and washing the construction surface of the aluminum alloy template clean by using deionized water, wherein the polishing solution comprises 300g/L NaOH and 100g/L NaNO220g/L NaF and 20g/L Na3PO4；
S2, performing laser drilling on the construction surface of the aluminum alloy template by adopting a nanosecond laser, immersing the construction surface of the aluminum alloy template into deionized water during laser drilling, and then performing laser drilling by utilizing the nanosecond laser, wherein the pulse width of laser is 6ns, the wavelength is 1064nm, the power is 4W, the repetition frequency is 10kHz, the depth of the aluminum alloy template construction surface immersed into the water surface is 23mm, and the aluminum alloy template construction surface is washed clean by deionized water and then dried after being processed;
s3, placing the aluminum alloy template in sodium hydroxide and Na3PO4The mixed solution of (1) is soaked, the mass concentration of the sodium hydroxide is 250g/L, and the Na is3PO4The concentration of the soaking solution is 65g/L, and the soaking time is 17 min;
s4, heating the aluminum alloy template to 135 ℃, immersing the construction surface of the aluminum alloy template into passivation solution, performing composite anodic oxidation for 65min under the voltage of 165V, keeping the temperature of the passivation solution at 60 ℃ during passivation, introducing oxygen into the passivation solution during passivation, performing ultrasonic oscillation on the passivation solution by using ultrasonic waves, wherein the frequency of the ultrasonic waves is 35KHz, washing with deionized water, and drying to obtain an anodized aluminum alloy template; the passivation solution comprises a mixed solution composed of fluozirconic acid, silicon tetrafluoride, urea, carboxymethyl cellulose and polytetrafluoroethylene emulsion, the mass concentration of the fluozirconic acid in the passivation solution is 25g/L, the mass concentration of the silicon tetrafluoride is 6.5g/L, the mass concentration of the urea is 10g/L, the mass concentration of the carboxymethyl cellulose is 4g/L, the mass concentration of the polytetrafluoroethylene emulsion is 1.5g/L, and the solvent of the passivation solution is an ethanol solution with the mass concentration of 20%;
and S5, placing the anodized aluminum alloy template into deionized water for soaking treatment, taking out and airing, wherein the temperature of the deionized water is 94 ℃, and the treatment time in the deionized water is 13 min.
Examples 3,
The surface passivation treatment process for the aluminum alloy template comprises the following steps of:
s1, grinding the aluminum alloy template to be flat, then immersing the construction surface of the aluminum alloy template into polishing solution with the temperature of 90 ℃ for polishing for 20S, and washing the construction surface of the aluminum alloy template with deionized water, wherein the polishing solution comprises 350g/L NaOH and 120g/L NaNO225g/L NaF and 25g/L Na3PO4；
S2, performing laser drilling on the construction surface of the aluminum alloy template by adopting a nanosecond laser, immersing the construction surface of the aluminum alloy template into deionized water during laser drilling, and then performing laser drilling by utilizing the nanosecond laser, wherein the pulse width of laser is 7ns, the wavelength is 1064nm, the power is 5W, the repetition frequency is 10kHz, the depth of the aluminum alloy template construction surface immersed into the water surface is 30mm, and the aluminum alloy template construction surface is washed clean by deionized water and then dried after being processed;
s3, placing the aluminum alloy template in sodium hydroxide and Na3PO4The mixed solution of (1) is soaked, the mass concentration of the sodium hydroxide is 300g/L, and the Na is3PO4The concentration of the raw materials is 80g/L, and the soaking time is 20 min;
s4, heating the aluminum alloy template to 150 ℃, immersing the construction surface of the aluminum alloy template into passivation solution, carrying out composite anodic oxidation for 80min under the voltage of 220V, keeping the temperature of the passivation solution at 70 ℃ during passivation, introducing oxygen into the passivation solution during passivation, carrying out ultrasonic oscillation on the passivation solution by using ultrasonic waves, wherein the frequency of the ultrasonic waves is 40KHz, washing with deionized water, and drying to obtain the anodic oxidation aluminum alloy template; the passivation solution comprises a mixed solution composed of fluozirconic acid, silicon tetrafluoride, urea, carboxymethyl cellulose and polytetrafluoroethylene emulsion, the mass concentration of the fluozirconic acid in the passivation solution is 30g/L, the mass concentration of the silicon tetrafluoride is 8g/L, the mass concentration of the urea is 12g/L, the mass concentration of the carboxymethyl cellulose is 5g/L, the mass concentration of the polytetrafluoroethylene emulsion is 2g/L, and the solvent of the passivation solution is an ethanol solution with the mass concentration of 30%;
and S5, placing the anodized aluminum alloy template into deionized water for soaking treatment, taking out and airing, wherein the temperature of the deionized water is 96 ℃, and the treatment time in the deionized water is 15 min.
Examples 4,
This example is different from example 2 only in that: in step S4, the aluminum alloy template is not heated, and the temperature of the passivation solution is kept at normal temperature.
Examples 5,
This example differs from example 2 only in that: in this embodiment, in step S4, no oxygen is introduced into the passivation solution during passivation.
Examples 6,
This example differs from example 2 only in that: in the present embodiment, in step S4, after the aluminum alloy template is passivated, the aluminum alloy template is not soaked in deionized water at 92-96 ℃.
Example 7,
This example differs from example 2 only in that: in step S4, when the aluminum alloy template is passivated, the passivation solution is not subjected to ultrasonic oscillation.
Comparative examples,
The comparative example is an aluminum alloy form disclosed in the background art under application No. CN 201911364232.4.
The aluminum alloy templates prepared in the above examples 1-7 and the comparative examples were subjected to alkali resistance tests twice, all according to GB/T8013.3-2018 standard, wherein the concentration of sodium hydroxide in experiment 1 is 5g/L, and the concentration of sodium hydroxide in experiment 2 is 10 g/L. As a result, in examples 1 to 7 and comparative examples, corrosion of the base metal occurred, and no spots were observed on the film surface and no darkening due to corrosion was observed. It is demonstrated that the aluminum alloy templates prepared in examples 1 to 7, and the comparative example have strong alkali resistance of the oxide film.
The passivation films of the aluminum alloy templates prepared in the above examples 1 to 7 and comparative examples were subjected to flatness test, and the results obtained by taking arbitrary 10 points (unit: μm) of the surface of the aluminum alloy template, measuring the thickness thereof and subtracting the thickness of the surface of the aluminum alloy template were as follows, and the passivation films of the respective examples were subjected to hardness test, and the results were also as follows:
Figure BDA0003453195570000081
Figure BDA0003453195570000091
it can be seen from the above tests that the construction surface of the aluminum alloy template prepared in each example is smooth, but the hardness of the passivation film of the aluminum alloy template prepared in example 2 is the highest, and the hardness of the passivation films prepared in examples 1 to 3 is higher than that of the passivation films prepared in other examples, which indicates that the aluminum alloy template prepared in example 2 has better corrosion resistance and stronger hardness, and can avoid damaging the passivation film layer during rubbing, so that the service life of the aluminum alloy template is longer.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims. The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.

Claims (9)

1. The surface passivation treatment process of the aluminum alloy template is characterized by comprising the following steps of: comprises the following steps of (a) carrying out,
s1, grinding and polishing the aluminum alloy template, and then cleaning;
s2, performing laser drilling on the construction surface of the aluminum alloy template by adopting a nanosecond laser;
s3, placing the aluminum alloy template in sodium hydroxide and Na3PO4Soaking in the mixed solution;
s4, immersing the construction surface of the aluminum alloy template into passivation solution, performing composite anodic oxidation for 50-80min under the voltage of 110-220V, washing with deionized water, and drying to obtain an anodic oxidation aluminum alloy template; the passivation solution comprises fluozirconic acid, silicon tetrafluoride, urea, carboxymethyl cellulose and polytetrafluoroethylene emulsion, and the solvent of the passivation solution is an ethanol solution with the mass concentration of 10-30%;
s5, placing the anodic aluminum oxide alloy template into deionized water for soaking treatment, and then taking out and airing.
2. The surface passivation treatment process of the aluminum alloy template as recited in claim 1, wherein: when the aluminum alloy template is polished in the step S1, the construction surface of the aluminum alloy template is immersed into polishing solution at the temperature of 80-90 ℃ for polishing for 15-20S, and then the construction surface of the aluminum alloy template is washed by deionized water, wherein the polishing solution comprises 250-350g/L NaOH and 80-120g/L NaNO215-25g/L NaF and 15-25g/L Na3PO4。
3. The surface passivation treatment process of the aluminum alloy template as recited in claim 2, characterized in that: when the laser drilling is performed on the construction surface of the aluminum alloy template in the step S2, the construction surface of the aluminum alloy template is immersed into deionized water, then laser drilling is performed by using a nanosecond laser, wherein the pulse width of the laser is 5-7ns, the wavelength is 1064nm, the power is 3-5W, the repetition frequency is 10kHz, the depth of the aluminum alloy template construction surface immersed into the water surface is 15-30mm, and the aluminum alloy template construction surface is washed clean by the deionized water and then dried after being processed.
4. The surface passivation treatment process of the aluminum alloy template as recited in claim 3, characterized in that: in the step S3, the mass concentration of the sodium hydroxide is 200-300g/L, and the Na is3PO4The concentration of the active ingredients is 50-80g/L, and the soaking time is 15-20 min.
5. The surface passivation treatment process of the aluminum alloy template as recited in claim 4, wherein: in the step S4, before passivation, the aluminum alloy template is heated to 120-150 ℃, the temperature of the passivation solution is kept at 50-70 ℃, and oxygen is introduced into the passivation solution during passivation.
6. The surface passivation treatment process of the aluminum alloy template as recited in claim 5, wherein: in the step S4, the mass concentration of fluozirconic acid in the passivation solution is 20-30g/L, the mass concentration of silicon tetrafluoride is 5-8g/L, the mass concentration of urea is 8-12g/L, the mass concentration of carboxymethyl cellulose is 3-5g/L, the mass concentration of polytetrafluoroethylene emulsion is 1-2g/L, and the solvent of the passivation solution is an ethanol solution with the mass concentration of 10-30%.
7. The surface passivation treatment process of the aluminum alloy template as recited in claim 6, wherein: in the step S4, the mass concentration of fluozirconic acid in the passivation solution is 25g/L, the mass concentration of silicon tetrafluoride is 6.5g/L, the mass concentration of urea is 10g/L, the mass concentration of carboxymethyl cellulose is 4g/L, the mass concentration of polytetrafluoroethylene emulsion is 1.5g/L, and the solvent of the passivation solution is 20% of ethanol solution.
8. The surface passivation treatment process of the aluminum alloy template as recited in claim 7, wherein: the temperature of the deionized water in the step S5 is 92-96 ℃, and the treatment time in the deionized water is 10-15 min.
9. The surface passivation treatment process of the aluminum alloy template as recited in claim 8, wherein: in the step S4, when the aluminum alloy template is passivated, the passivation solution is subjected to ultrasonic oscillation by using ultrasonic waves, and the frequency of the ultrasonic waves is 30 to 40 KHz.
CN202111678563.2A 2021-12-31 2021-12-31 Surface passivation treatment process for aluminum alloy template Pending CN114517320A (en)

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