Maintenance process of high-performance aluminum alloy photovoltaic support extrusion die

Abstract

The application provides a high-performance aluminum alloy photovoltaic support extrusion die maintenance process, which comprises the following steps: putting an H13 steel extrusion die into a phosphating solution for immersion until a layer of phosphating film is formed on the surface of the H13 steel extrusion die; and using a passivation sealing liquid to perform passivation sealing treatment on the phosphated H13 steel extrusion die. The H13 steel extrusion die maintained in the later stage has high high-temperature resistance and long service life, thereby improving the surface quality of the aluminum profile and improving the production efficiency.

Description

Technical field

[0001] The present invention relates to the technical field of photovoltaic bracket manufacturing, and in particular to a maintenance process for a high-performance aluminum alloy photovoltaic bracket extrusion die. [Background Technology]

[0002] In the manufacturing of photovoltaic brackets, the raw material is typically 6005 / 6063 / 6061 aluminum alloys, which are first formed into aluminum bars. These bars are then extruded into aluminum profiles, and finally, aluminum alloy photovoltaic brackets are manufactured from these profiles. The molds used in the extrusion process are made from H13 steel. Due to its excellent heat resistance and mechanical strength, H13 steel is often used in the production of hot working molds, especially for aluminum extrusion molds.

[0003] Existing extrusion dies must undergo a nitriding treatment before use, forming a hard nitride film on the surface. This helps improve the surface strength and corrosion resistance of the die. However, long-term production applications have shown that even after nitriding, the surface quality of aluminum profiles produced by the die deteriorates due to the lack of a lubricating film. Furthermore, the die surface is prone to scratches. Therefore, damaged extrusion die surfaces require maintenance to extend their service life.

[0004] Furthermore, before existing extrusion dies are used to extrude aluminum profiles, they must be heated to 0.75-0.90 times the absolute melting point of the aluminum alloy. Typically, H13 steel extrusion dies need to be heated to 440°C to 500°C. However, ordinary phosphate coatings have low high-temperature resistance and lose their effectiveness at high temperatures of 440°C to 500°C.

[0005] In view of this, the inventors of this case conducted in-depth research on the above-mentioned issues, which led to the creation of this case. [Summary of the invention]

[0006] The present invention provides a maintenance process for a high-performance aluminum alloy photovoltaic bracket extrusion die. The surface of the H13 steel extrusion die is maintained in the later stage, so that the high-temperature resistance of the H13 steel extrusion die is enhanced, the service life of the H13 steel extrusion die is extended, and the surface quality of the produced aluminum profile is improved.

[0007] The present invention is implemented as follows: a maintenance process for a high-performance aluminum alloy photovoltaic bracket extrusion die, comprising the following steps:

[0008] Step 1: Soak the H13 steel extrusion die in the phosphating solution until a phosphating film is formed on the surface of the H13 steel extrusion die;

[0009] Step 2: Use passivation sealing liquid to passivate and seal the phosphating H13 steel extrusion die.

[0010] Furthermore, the phosphating solution is prepared as follows:

[0011] Step 1.1: Dissolve 15-20 ml of 85% phosphoric acid in 1100-1200 ml of deionized water at room temperature to form a phosphoric acid solution.

[0012] Step 1.2: Dissolve 10-15g of zinc oxide in phosphoric acid solution and stir until dissolved;

[0013] Step 1.3: Add 25-30 ml of 65% nitric acid, 0.8-1.0 g of nickel nitrate, and 1-2 g of citric acid in sequence, then add 30-35 g of calcium carbonate and stir to dissolve, then add 0.4-0.6 g each of sodium lauryl sulfate and OP-10, and finally add the additive.

[0014] Furthermore, the auxiliary agent is a mixture of 1-2 g of hydroxylamine sulfate and 0-2 g of sodium fluoride.

[0015] Furthermore, the mass ratio of the sodium lauryl sulfate and OP-10 is 1:1.

[0016] Furthermore, the H13 steel extrusion die is immersed in the phosphating solution for 5-10 minutes.

[0017] Furthermore, the passivation sealing liquid is prepared as follows:

[0018] Step 2.1: Add 10-20 ml of 50% phytic acid to 900 ml of deionized water and stir well.

[0019] Step 2.2: Add 15-20g of sodium silicate and heat to 40°C and stir to dissolve;

[0020] Step 2.3: Add 5-10 g of aluminum oxide.

[0021] Furthermore, the H13 steel extrusion die is immersed in the passivation sealing liquid for 5-10 minutes.

[0022] The advantages of the present invention are:

[0023] 1. The post-maintenance process of H13 steel extrusion dies for producing aluminum alloy photovoltaic brackets includes immersion in phosphating solution and passivation and sealing treatment. First, immersion in phosphating solution forms a phosphating film on the surface of the H13 steel extrusion die. Phosphating treatment can be carried out at room temperature, and the process is simple. Secondly, passivation and sealing treatment increases the gaps in the phosphating film on the surface of the H13 steel extrusion die, which can produce a lubricating effect and thus extend the service life of the H13 steel extrusion die. The phosphating film after passivation and sealing can withstand a maximum temperature of 800°C, making the H13 steel extrusion die resistant to high temperatures and improving the surface quality of the produced aluminum profiles.

[0024] 2. Calcium carbonate and zinc oxide are added to the phosphating solution to produce calcium zinc phosphate coating. The calcium zinc phosphate ion has a large specific surface area, which makes the mold have stronger anti-rust activity.

[0025] 3. Since nickel nitrate is added to the phosphating solution formula, the phosphating solution has a high efficiency phosphating effect. The mold only needs to be immersed in the phosphating solution for 5-10 minutes to form a phosphating film on the mold surface.

[0026] 4. Additives are used in the phosphating solution formula to lower the reaction temperature so that the mold can react with the phosphating solution to form a phosphating film at room temperature, which plays a promoting role and reduces the reaction conditions.

[0027] 5. The passivation sealing liquid reacts with the phosphate film to generate compounds such as ZnSiO3 and CaSiO3, forming a colloidal coating that covers the surface of the phosphate film, blocking the pores between the grains and the phosphate film, significantly improving the density of the phosphate film, and thus improving the lubrication effect.

Brief Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments.

[0029] Figure 1 This is the surface image of the existing H13 steel extrusion die after nitriding treatment under the SEM electron microscope.

[0030] Figure 2 This is a surface image of the H13 steel extrusion die of the present invention after phosphating treatment under a SEM electron microscope.

[0031] Figure 3 This is a surface image of the H13 steel extrusion die after passivation and sealing treatment under a SEM electron microscope. [Specific implementation method]

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention.

[0033] Please refer to Figure 1-3 As shown, the present invention provides a maintenance process for a high-performance aluminum alloy photovoltaic bracket extrusion die, comprising the following steps:

[0034] Step 1: Soak the H13 steel extrusion die in the phosphating solution until a phosphating film is formed on the surface of the H13 steel extrusion die;

[0035] Step 2: Use passivation sealing liquid to passivate and seal the phosphating H13 steel extrusion die.

[0036] The maintenance process of the H13 steel extrusion die for producing aluminum alloy photovoltaic brackets according to the present invention comprises immersion in a phosphating solution treatment and a passivation and sealing treatment. First, the immersion in the phosphating solution forms a phosphating film on the surface of the H13 steel extrusion die, and the phosphating treatment can be performed at room temperature, which is a simple process. Second, the passivation and sealing treatment increases the gaps between the phosphating films on the surface of the H13 steel extrusion die, thereby producing a lubricating effect and thereby extending the service life of the H13 steel extrusion die. The phosphating film after passivation and sealing has a maximum temperature resistance of up to 800° C., which makes the H13 steel extrusion die have high-temperature resistance and can also improve the surface quality of the produced aluminum profile.

[0037] In the present invention, the phosphating solution is environmentally friendly and pollution-free, and the preparation method of the phosphating solution is:

[0038] Step 1.1: Dissolve 15-20 ml of 85% phosphoric acid in 1100-1200 ml of deionized water at room temperature to form a phosphoric acid solution.

[0039] Step 1.2: Dissolve 10-15 g of zinc oxide in phosphoric acid solution and stir to dissolve it; zinc oxide provides the raw material for producing calcium zinc phosphate coating.

[0040] Step 1.3: Add 25-30 ml of 65% nitric acid, 0.8-1.0 g of nickel nitrate, and 1-2 g of citric acid in sequence, then add 30-35 g of calcium carbonate and stir to dissolve, then add 0.4-0.6 g each of sodium lauryl sulfate and OP-10, and finally add the additive.

[0041] Adding 65% nitric acid and phosphoric acid together acts as an acid to dissolve zinc oxide and calcium carbonate. The 65% nitric acid mainly maintains the acidity and stabilizes the bath solution.

[0042] Nickel nitrate is added to refine the coating, accelerate the formation of the phosphate film, and increase the anti-rust effect.

[0043] Citric acid is added to adjust the free acidity and has a complexing effect.

[0044] Calcium carbonate is added to produce calcium zinc phosphate coating with zinc oxide. The calcium zinc phosphate ion has a large specific surface area, which makes the mold have stronger anti-rust activity.

[0045] In the present invention, the auxiliary agent is a mixture of 1-2g of hydroxylamine sulfate and 0-2g of sodium fluoride. Phosphating of steel generally requires high-temperature heating of the solution. The auxiliary agent is used in the phosphating solution formulation of the present invention to lower the reaction temperature, allowing the mold to react with the phosphating solution to form a phosphating film at room temperature, thereby promoting the reaction and reducing reaction conditions.

[0046] In the present invention, the auxiliary agent is preferably a mixture of 2 g of hydroxylamine sulfate and 2 g of sodium fluoride.

[0047] In the present invention, the ratio of the additives sodium dodecyl sulfate and OP-10 is preferably 1:1, with 0.5 g of sodium dodecyl sulfate and 0.5 g of OP-10, so as to optimize the effects of the two additives and promote the phosphating reaction.

[0048] In the present invention, the H13 steel extrusion die is immersed in the phosphating solution for 5-10 minutes. Due to the addition of nickel nitrate, the phosphating solution has a highly efficient phosphating effect. A phosphating film forms on the die surface after only 5-10 minutes of immersion, significantly improving maintenance efficiency.

[0049] In the present invention, the passivation sealing liquid is prepared as follows:

[0050] Step 2.1: Add 10-20 ml of 50% phytic acid to 900 ml of deionized water and stir evenly; adding 50% phytic acid makes the passivation sealing solution more stable. It is a good metal additive. In addition to acidity, it also has corrosion inhibition function.

[0051] Step 2.2: Add 15-20g of sodium silicate and heat to 40℃ and stir to dissolve.

[0052] Step 2.3: Add 5-10 g of aluminum oxide.

[0053] The purpose of the passivation sealing treatment is to form a closed passivation film on the surface of the phosphate film, which plays a protective role and also increases the lubrication performance of the phosphate film. The passivation sealing liquid reacts with the phosphate film to generate compounds such as ZnSiO3 and CaSiO3, forming a colloidal coating that covers the surface of the phosphate film, blocking the pores between the grains and the phosphate film, significantly improving the density of the phosphate film, and thus improving the lubrication effect of the phosphate film.

[0054] In the present invention, the H13 steel extrusion die is immersed in the passivation sealing liquid for 5-10 minutes.

[0055] The present post-processing maintenance process is targeted at H13 steel extrusion dies. The H13 steel grade is 4Cr5MoSiV1, which contains 0.32%-0.45% carbon, 0.80%-1.20% silicon, 0.20%-0.50% manganese, 4.75%-5.50% chromium, 1.10%-1.75% molybdenum, 0.80%-1.20% vanadium, and small amounts of trace elements such as phosphorus and sulfur. Several experiments were conducted to further illustrate the beneficial technical effects of the H13 steel extrusion die post-processing maintenance process.

[0056] Experimental Group 1

[0057] Preliminary pretreatment: Use a small piece of silicon carbide sandpaper to polish the rusty areas on the surface of the H13 steel extrusion die, then put it into acetone ultrasonic cleaning for 5 minutes, then put the sample into 10% hydrochloric acid for 1 minute, rinse with clean water, and dry it with cold air to obtain the H13 steel extrusion die to be tested.

[0058] In the first experiment, the pretreated H13 steel extrusion die was reciprocated and polished 30 times with 1000-grit, 20 cm long sandpaper under a pressure of 1 kg. The die was then subjected to a wear test, a neutral salt spray test according to the GB 6458-86 standard, and a high-temperature resistance test of the phosphoric acid film. The surface of the nitrided H13 steel extrusion die was also recorded using an SEM optical electron microscope.

[0059] Second experiment: Under a pressure of 1kg, the H13 steel extrusion die after the first experiment was immersed in phosphating solution for phosphating treatment. After drying, it was reciprocated and polished 30 times with 1000-grit 20cm long sandpaper. Then, it was tested for wear, neutral salt spray under GB 6458-86 standard, and high temperature resistance of the phosphoric acid film. At the same time, the surface image of the H13 steel extrusion die after phosphating treatment was recorded using an SEM optical electron microscope.

[0060] In this experiment, the phosphating solution was prepared as follows: 18 ml of 85% phosphoric acid was dissolved in 1150 ml of deionized water at room temperature to form a phosphoric acid solution; 12 g of zinc oxide was then dissolved in the phosphoric acid solution and stirred to dissolve; finally, 27 ml of 65% nitric acid, 1 g of nickel nitrate, and 2 g of citric acid were added in sequence, and 33 g of calcium carbonate was added and stirred to dissolve, and then 0.5 g of sodium dodecyl sulfate, 0.5 g of OP-10, 2 g of hydroxylamine sulfate, and 2 g of sodium fluoride were added and stirred evenly to obtain the desired phosphating solution.

[0061] The third experiment: Under a pressure of 1kg, the H13 steel extrusion die after the second experiment was passivated and sealed. After drying, it was reciprocated and polished 30 times with 1000-grit 20cm long sandpaper. Then, a wear test, a neutral salt spray test under the GB 6458-86 standard, and a high-temperature resistance test of the phosphoric acid film were performed in sequence. At the same time, a SEM optical electron microscope was used to record the surface image of the H13 steel extrusion die after passivation and sealing treatment.

[0062] In this experiment, the passivation sealing liquid was prepared as follows: 15 ml of 50% phytic acid was added to 900 ml of deionized water and stirred evenly; 18 g of sodium silicate was added and heated to 40°C and stirred to dissolve; finally, 5 g of aluminum oxide was added and stirred evenly to obtain the desired passivation sealing liquid.

[0063] Table 1 Various parameters of H13 steel extrusion die after three experiments

[0064]

[0065] It can be seen from Table 1 that after phosphating treatment, the wear per unit area of ​​the mold is reduced and the neutral salt spray resistance time is increased; after passivation and sealing treatment, the wear per unit area of ​​the mold is greatly reduced, and the neutral salt spray resistance time is greatly increased. At the same time, the high temperature resistance of the phosphate film is greatly improved, the probability of phosphate film damage is reduced, and the service life is increased.

[0066] Experimental Group 2

[0067] Preliminary pretreatment: Use a small piece of silicon carbide sandpaper to polish the rusty areas on the surface of the H13 steel extrusion die, then put it into acetone ultrasonic cleaning for 5 minutes, then put the sample into 10% hydrochloric acid for 1 minute, rinse with clean water, and dry it with cold air to obtain the H13 steel extrusion die to be tested.

[0068] In the first experiment, the pretreated H13 steel extrusion die was reciprocated and polished 30 times with 1000-grit, 20 cm long sandpaper under a pressure of 1 kg. The die was then subjected to a wear test, a neutral salt spray test according to the GB 6458-86 standard, and a high-temperature resistance test of the phosphoric acid film. The surface of the nitrided H13 steel extrusion die was also recorded using an SEM optical electron microscope.

[0069] Second experiment: Under a pressure of 1kg, the H13 steel extrusion die after the first experiment was immersed in phosphating solution for phosphating treatment. After drying, it was reciprocated and polished 30 times with 1000-grit 20cm long sandpaper. Then, it was tested for wear, neutral salt spray under GB 6458-86 standard, and high temperature resistance of the phosphoric acid film. At the same time, the surface image of the H13 steel extrusion die after phosphating treatment was recorded using an SEM optical electron microscope.

[0070] In this experiment, the phosphating solution was prepared as follows: 17 ml of 85% phosphoric acid was dissolved in 1150 ml of deionized water at room temperature to form a phosphoric acid solution; 10 g of zinc oxide was then dissolved in the phosphoric acid solution and stirred to dissolve; finally, 25 ml of 65% nitric acid, 0.8 g of nickel nitrate, and 1 g of citric acid were added in sequence, and 30 g of calcium carbonate was added and stirred to dissolve, and then 0.4 g of sodium dodecyl sulfate, 0.6 g of OP-10, 1 g of hydroxylamine sulfate, and 1 g of sodium fluoride were added and stirred evenly to obtain the desired phosphating solution.

[0071] The third experiment: Under a pressure of 1kg, the H13 steel extrusion die after the second experiment was passivated and sealed. After drying, it was reciprocated and polished 30 times with 1000-grit 20cm long sandpaper. Then, a wear test, a neutral salt spray test under the GB 6458-86 standard, and a high-temperature resistance test of the phosphoric acid film were performed in sequence. At the same time, a SEM optical electron microscope was used to record the surface image of the H13 steel extrusion die after passivation and sealing treatment.

[0072] In this experiment, the passivation sealing liquid was prepared as follows: 10 ml of 50% phytic acid was added to 900 ml of deionized water and stirred evenly; 15 g of sodium silicate was added and heated to 40°C and stirred to dissolve; finally, 6 g of aluminum oxide was added and stirred evenly to obtain the desired passivation sealing liquid.

[0073] Table 2 Various parameters of H13 steel extrusion die after three experiments

[0074]

[0075] It can be seen from Table 2 that after phosphating treatment, the wear per unit area of ​​the mold is reduced and the neutral salt spray resistance time is increased; after passivation and sealing treatment, the wear per unit area of ​​the mold is greatly reduced, and the neutral salt spray resistance time is greatly increased. At the same time, the high temperature resistance of the phosphate film is greatly improved, the probability of phosphate film damage is reduced, and the service life is increased.

[0076] Experimental Group 3

[0077] Preliminary pretreatment: Use a small piece of silicon carbide sandpaper to polish the rusty areas on the surface of the H13 steel extrusion die, then put it into acetone ultrasonic cleaning for 5 minutes, then put the sample into 10% hydrochloric acid for 1 minute, rinse with clean water, and dry it with cold air to obtain the H13 steel extrusion die to be tested.

[0078] In the first experiment, the pretreated H13 steel extrusion die was reciprocated and polished 30 times with 1000-grit, 20 cm long sandpaper under a pressure of 1 kg. The die was then subjected to a wear test, a neutral salt spray test according to the GB 6458-86 standard, and a high-temperature resistance test of the phosphoric acid film. The surface of the nitrided H13 steel extrusion die was also recorded using an SEM optical electron microscope.

[0079] Second experiment: Under a pressure of 1kg, the H13 steel extrusion die after the first experiment was immersed in phosphating solution for phosphating treatment. After drying, it was reciprocated and polished 30 times with 1000-grit 20cm long sandpaper. Then, it was tested for wear, neutral salt spray under GB 6458-86 standard, and high temperature resistance of the phosphoric acid film. At the same time, the surface image of the H13 steel extrusion die after phosphating treatment was recorded using an SEM optical electron microscope.

[0080] In this experiment, the phosphating solution was prepared as follows: at room temperature, 20 ml of 85% phosphoric acid was dissolved in 1150 ml of deionized water to form a phosphoric acid solution; 15 g of zinc oxide was then dissolved in the phosphoric acid solution and stirred to dissolve; finally, 30 ml of 65% nitric acid, 0.9 g of nickel nitrate, and 2 g of citric acid were added in sequence, and 35 g of calcium carbonate was added and stirred to dissolve, and then 0.6 g of sodium dodecyl sulfate, 0.4 g of OP-10, and 2 g of hydroxylamine sulfate were added and stirred evenly to obtain the desired phosphating solution.

[0081] The third experiment: Under a pressure of 1kg, the H13 steel extrusion die after the second experiment was passivated and sealed. After drying, it was reciprocated and polished 30 times with 1000-grit 20cm long sandpaper. Then, a wear test, a neutral salt spray test under the GB 6458-86 standard, and a high-temperature resistance test of the phosphoric acid film were performed in sequence. At the same time, a SEM optical electron microscope was used to record the surface image of the H13 steel extrusion die after passivation and sealing treatment.

[0082] In this experiment, the passivation sealing liquid was prepared as follows: 20 ml of 50% phytic acid was added to 900 ml of deionized water and stirred evenly; 20 g of sodium silicate was added and heated to 40°C and stirred to dissolve; finally, 10 g of aluminum oxide was added and stirred evenly to obtain the desired passivation sealing liquid.

[0083] Table 3 Various parameters of H13 steel extrusion die after three experiments

[0084]

[0085] It can be seen from Table 3 that after phosphating treatment, the wear per unit area of ​​the mold is reduced and the neutral salt spray resistance time is increased; after passivation and sealing treatment, the wear per unit area of ​​the mold is greatly reduced and the neutral salt spray resistance time is greatly increased. At the same time, the high temperature resistance of the phosphate film is greatly improved, the probability of phosphate film damage is reduced, and the service life is increased.

[0086] Since the wear amount of experimental group 1 was the smallest and the wear resistance was the best after three experiments, the H13 steel extrusion die obtained from the three experiments of experimental group 1 was used to produce aluminum profiles, and aluminum bars were made of 6005 series aluminum. The maximum extrusion speed of the H13 steel extrusion die when producing aluminum profiles was measured, and the maximum amount of aluminum profiles that could be produced before the H13 steel extrusion die was strained was measured.

[0087] Table 4 Production parameters of H13 steel extrusion die after three experiments

[0088]

[0089] From Table 4 we can see that:

[0090] 1. The amount of aluminum profiles that can be produced by the H13 steel extrusion die after passivation and sealing treatment is greatly increased, that is, the service life is extended; at the same time, due to the enhanced lubrication performance of the surface of the H13 steel extrusion die after passivation, the maximum speed of aluminum extrusion per unit time is significantly increased, thereby improving the production efficiency of aluminum profiles.

[0091] 2. The overall performance of the H13 steel extrusion die after passivation and sealing treatment is better than that after only phosphating treatment. The overall performance of the H13 steel extrusion die after only phosphating treatment is better than that of the H13 steel extrusion die after only nitriding treatment.

[0092] 3. The phosphate film after passivation and sealing can withstand a maximum temperature of 800°C, making the H13 steel extrusion die have high temperature resistance.

[0093] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A maintenance process for a high-performance aluminum alloy photovoltaic bracket extrusion die, characterized by: The steps include: Step 1: Immerse the H13 steel extrusion die in a phosphating solution until a phosphating film is formed on the surface of the H13 steel extrusion die. The phosphating solution is prepared as follows: Step 1.1: Dissolve 15-20 ml of 85% phosphoric acid in 1100-1200 ml of deionized water at room temperature to form a phosphoric acid solution. Step 1.2: Dissolve 10-15g of zinc oxide in phosphoric acid solution and stir until dissolved; Step 1.3: Then, add 25-30 ml of 65% nitric acid, 0.8-1.0 g of nickel nitrate, and 1-2 g of citric acid in sequence, add 30-35 g of calcium carbonate, stir and dissolve, then add 0.4-0.6 g each of sodium lauryl sulfate and OP-10, and finally add auxiliary agents, which are 1-2 g of hydroxylamine sulfate and 0-2 g of sodium fluoride; Step 2: Use a passivation sealing liquid to perform passivation sealing treatment on the phosphated H13 steel extrusion die; the passivation sealing liquid is prepared as follows: Step 2.1: Add 10-20 ml of 50% phytic acid to 900 ml of deionized water and stir well. Step 2.2: Add 15-20g of sodium silicate and heat to 40°C and stir to dissolve; Step 2.3: Add 5-10 g of aluminum oxide.

2. The maintenance process for the high-performance aluminum alloy photovoltaic bracket extrusion die according to claim 1 is characterized by: The mass ratio of the sodium lauryl sulfate and OP-10 is 1:

1.

3. The maintenance process for the high-performance aluminum alloy photovoltaic bracket extrusion die according to claim 1 is characterized by: The H13 steel extrusion die is immersed in the phosphating solution for 5-10 minutes.

4. The maintenance process for the high-performance aluminum alloy photovoltaic bracket extrusion die according to claim 3 is characterized by: The H13 steel extrusion die is immersed in the passivation sealing liquid for 5-10 minutes.

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