Anticorrosive solar frame and preparation method thereof

Abstract

This invention discloses an anti-corrosion solar cell frame and its preparation method, comprising a frame substrate and a protective layer. This invention effectively improves its anti-corrosion performance while ensuring its safety and stability in environments with large temperature differences and strong winds, thus guaranteeing its service life. The activating liquid imparts a large number of active groups to the surface of the solar cell substrate, which is beneficial to the adhesion of the subsequent protective layer to the solar cell substrate surface, ensuring the durability of the protective layer and extending the service life of the solar cell frame. An anodic oxide film can be formed on the surface of the solar cell substrate, and a sealing agent can be used to seal the pores of the anodic oxide film, effectively sealing the pores on the outer surface and improving the corrosion resistance of the anodic oxide film. The surface modifier forms a micro-nano rough structure on the anodic oxide film after sealing, which improves hydrophobicity, reduces the corrosion contact area, and inhibits corrosion.

Description

Technical Field

[0001] This invention relates to the field of solar cell frame technology, and more specifically, to a corrosion-resistant solar cell frame and its preparation method. Background Technology

[0002] Solar cell modules are the core and most important component of a solar power generation system. Their function is to convert solar energy into electrical energy, which can then be stored in batteries or used to power loads. A solar cell module mainly consists of: glass, EVA, TPT, and a frame. The aluminum alloy frame used in the solar cell module is high-strength and highly resistant to mechanical impact. The solar cell frame refers to the aluminum alloy profile fixing frame and bracket in the photovoltaic solar cell module; it is mainly used to fix and seal the solar cell module, enhance its strength, extend its service life, and facilitate transportation and installation.

[0003] However, existing solar cell modules often need to be installed in areas with sufficient sunlight. When used in Northwest my country, solar cell modules need to face problems such as large temperature differences between day and night and strong winds and sandstorms for a long time. Under the long-term effects of temperature differences and wind and sandstorms, the surface corrosion resistance of the solar cell frame decreases, shortening its service life. Summary of the Invention

[0004] To overcome the above-mentioned defects of the prior art, embodiments of the present invention provide a corrosion-resistant solar panel frame and a method for preparing the same.

[0005] A corrosion-resistant solar panel frame includes a frame substrate and a protective layer; the protective layer is disposed on the surface of the frame substrate, and the thickness ratio of the protective layer to the frame substrate is 1:90-100. The protective layer includes an anodic oxide film, and the base solution of the anodic oxide film comprises, by weight percentage: 17-19% sulfuric acid, 1.1-1.3% aluminum sulfate, 1.4-1.6% glycerol, and the remainder being deionized water.

[0006] Furthermore, it also includes an activating solution, a sealing agent, and a surface modifier; the activating solution comprises, by weight percentage: 4.2–4.6% aluminum chloride, 1.3–1.5% sodium methacrylate sulfonate, 0.4–0.6% hydrolyzed polymaleic anhydride, with the remainder being deionized water; the sealing agent comprises, by weight percentage: 0.7–0.9% potassium dichromate, 3.6–3.8% ammonium fluorotitanate, with the remainder being deionized water; the surface modifier comprises, by weight percentage: 0.9–1.1% stearic acid, with the remainder being an ethanol solution; the concentration of the ethanol solution is 40–60%.

[0007] Furthermore, the thickness ratio of the protective layer to the frame substrate is 1:90. The protective layer includes an anodic oxide film. The base solution of the anodic oxide film, calculated by weight percentage, includes: 17% sulfuric acid, 1.1% aluminum sulfate, 1.4% glycerol, and the remainder is deionized water. The activation solution, calculated by weight percentage, includes: 4.2% aluminum chloride, 1.3% sodium methacrylate sulfonate, 0.4% hydrolyzed polymaleic anhydride, and the remainder is deionized water. The sealing agent, calculated by weight percentage, includes: 0.7% potassium dichromate, 3.6% ammonium fluorotitanate, and the remainder is deionized water. The surface modifier, calculated by weight percentage, includes: 0.9% stearic acid, and the remainder is an ethanol solution; the concentration of the ethanol solution is 40%.

[0008] Furthermore, the thickness ratio of the protective layer to the frame substrate is 1:100. The protective layer includes an anodic oxide film. The base solution of the anodic oxide film, calculated by weight percentage, includes: 19% sulfuric acid, 1.3% aluminum sulfate, 1.6% glycerol, and the remainder is deionized water. The activation solution, calculated by weight percentage, includes: 4.6% aluminum chloride, 1.5% sodium methacrylate sulfonate, 0.6% hydrolyzed polymaleic anhydride, and the remainder is deionized water. The sealing agent, calculated by weight percentage, includes: 0.9% potassium dichromate, 3.8% ammonium fluorotitanate, and the remainder is deionized water. The surface modifier, calculated by weight percentage, includes: 1.1% stearic acid, and the remainder is an ethanol solution; the concentration of the ethanol solution is 60%.

[0009] Furthermore, the thickness ratio of the protective layer to the frame substrate is 1:95. The protective layer includes an anodic oxide film. The base solution of the anodic oxide film, calculated by weight percentage, includes: 18% sulfuric acid, 1.2% aluminum sulfate, 1.5% glycerol, and the remainder is deionized water. The activation solution, calculated by weight percentage, includes: 4.4% aluminum chloride, 1.4% sodium methacrylate sulfonate, 0.5% hydrolyzed polymaleic anhydride, and the remainder is deionized water. The sealing agent, calculated by weight percentage, includes: 0.8% potassium dichromate, 3.7% ammonium fluorotitanate, and the remainder is deionized water. The surface modifier, calculated by weight percentage, includes: 1.0% stearic acid, and the remainder is an ethanol solution; the concentration of the ethanol solution is 50%.

[0010] A method for preparing a corrosion-resistant solar panel frame, the specific preparation steps of which are as follows:

[0011] Step 1: Weigh out the sulfuric acid, aluminum sulfate, glycerol, and deionized water from the base solution of the anodic oxide film; weigh out the aluminum chloride, sodium methyl methacrylate, hydrolyzed polymaleic anhydride, and deionized water from the activation solution; weigh out the potassium dichromate, ammonium fluorotitanate, and deionized water from the sealing agent; weigh out the stearic acid and ethanol solution from the surface modifier.

[0012] Step 2: The sulfuric acid, aluminum sulfate, glycerol, and deionized water in the base solution of the anodic oxide film from Step 1 are mixed and stirred for 20-40 minutes to obtain the base solution of the anodic oxide film. The aluminum chloride, sodium methacrylate, hydrolyzed polymaleic anhydride, and deionized water in the activation solution are ultrasonically vibrated for 10-20 minutes, followed by high-temperature flame treatment for 3-5 seconds to obtain the activation solution. The potassium dichromate, ammonium fluorotitanate, and deionized water in the sealing agent are mixed and stirred for 20-40 minutes to obtain the sealing agent. The stearic acid and ethanol solution in the surface modifier are mixed and stirred for 20-40 minutes to obtain the surface modifier.

[0013] Step 3: Perform laser cleaning on the surface of the frame substrate to obtain a pre-treated frame substrate;

[0014] Step 4: Spray the activation solution from Step 2 evenly onto the pretreated frame substrate surface, and then perform high-temperature flame treatment for 3-5 seconds to obtain a surface-activated frame substrate.

[0015] Step 5: Add the surface-activated border substrate to the base solution of the anodic oxide film in Step 2, and perform anodic oxidation treatment to obtain a border substrate with an anodic oxide film on its surface;

[0016] Step 6: Add the frame substrate with anodized film on the surface from Step 5 to the sealing agent from Step 2, and ultrasonically treat it in a water bath for 20-40 minutes to obtain a frame substrate with anodized film on the surface for sealing.

[0017] Step 7: Add the frame substrate with the surface sealing anodized film from Step 6 to the surface modifier from Step 2, let it stand for 20-40 minutes, take it out and put it into a drying oven for curing for 1.5-2.5 hours to form a protective layer on the surface of the frame substrate, thus obtaining an anti-corrosion solar frame.

[0018] Furthermore, in step two, the mixing and stirring speed is 450–530 r / min, the ultrasonic frequency is 1.4–1.6 MHz, the ultrasonic power is 400–500 W, and high-temperature flame treatment is performed at 580–620 °C; in step three, the average laser power of the laser processing is 130–150 W, the scanning speed is 3400–3600 mm / s, and the number of cleaning cycles is 1–2; in step four, the amount of active liquid sprayed is 380–400 mL / m 2 The process involves high-temperature flame treatment at 580–620℃; in step five, the base liquid temperature is -5 to -2℃, and the anodizing current density is 2.3–2.7 A / dm³. 2The anodizing treatment time is 60-80 min; in step six, the water bath temperature is 60-80℃, the ultrasonic frequency is 1.3-1.5MHz, and the ultrasonic power is 300-400W; in step seven, the drying oven temperature is 110-130℃.

[0019] Furthermore, in step two, the mixing and stirring speed is 450 r / min, the ultrasonic frequency is 1.4 MHz, the ultrasonic power is 400 W, and high-temperature flame treatment is performed at 580℃; in step three, the laser processing has an average laser power of 130 W, a scanning speed of 3400 mm / s, and one cleaning cycle; in step four, the active liquid spraying volume is 380 mL / m 2 The process involves high-temperature flame treatment at 580℃; in step five, the base liquid temperature is -5℃ and the anodizing current density is 2.3A / dm³. 2 The anodizing treatment time is 60 min; in step six, the water bath temperature is 60℃, the ultrasonic frequency is 1.3MHz, and the ultrasonic power is 300W; in step seven, the drying oven temperature is 110℃.

[0020] Furthermore, in step two, the mixing and stirring speed is 530 r / min, the ultrasonic frequency is 1.6 MHz, the ultrasonic power is 500 W, and high-temperature flame treatment is performed at 620℃; in step three, the laser processing has an average laser power of 150 W, a scanning speed of 3600 mm / s, and two cleaning cycles; in step four, the active liquid spraying volume is 400 mL / m 2 The process involves high-temperature flame treatment at 620℃; in step five, the base liquid temperature is -2℃ and the anodizing current density is 2.7A / dm³. 2 The anodizing treatment time is 80 min; in step six, the water bath temperature is 80℃, the ultrasonic frequency is 1.5MHz, and the ultrasonic power is 400W; in step seven, the drying oven temperature is 130℃.

[0021] Furthermore, in step two, the mixing and stirring speed is 490 r / min, the ultrasonic frequency is 1.5 MHz, the ultrasonic power is 450 W, and high-temperature flame treatment is performed at 600℃; in step three, the laser processing has an average laser power of 140 W, a scanning speed of 3500 mm / s, and one cleaning cycle; in step four, the active liquid spraying volume is 390 mL / m 2 The process involves high-temperature flame treatment at 600℃; in step five, the base liquid temperature is -3℃ and the anodizing current density is 2.5A / dm³. 2 The anodizing treatment time is 70 min; in step six, the water bath temperature is 70℃, the ultrasonic frequency is 1.4MHz, and the ultrasonic power is 350W; in step seven, the drying oven temperature is 120℃.

[0022] The technical effects and advantages of this invention are as follows:

[0023] The anti-corrosion solar frame processed using the raw material formula of this invention can effectively improve its own anti-corrosion performance, while ensuring its safety and stability when used in environments with large temperature differences and strong winds and sandstorms, thereby ensuring its service life. The activation liquid applied to the surface of the solar substrate can impart a large number of active groups to the surface of the solar substrate, which is beneficial to the adhesion of the subsequent protective layer to the surface of the solar substrate, while ensuring the adhesion between particles inside the protective layer and reducing porosity. It can effectively prevent the protective layer from peeling off at high temperatures, ensuring the durability of the protective layer, thereby extending the service life of the solar frame. The base liquid of the anodic oxide film is used to form an anodic oxide film on the surface of the solar substrate. The pore-sealing agent is used to seal the pores of the anodic oxide film, which can effectively seal the pores on the outer surface and effectively improve the corrosion resistance of the anodic oxide film. The stearic acid and ammonium fluorotitanate in the surface modifier work together to modify the surface of the anodic oxide film after sealing, forming a micro-nano rough structure with low surface energy, which can improve hydrophobicity, reduce the corrosion contact area and inhibit corrosion, and further improve corrosion resistance.

[0024] This invention enables laser cleaning of the frame substrate surface. During the cleaning process, thermal oxidation occurs on the frame substrate surface, effectively improving the corrosion resistance of the cleaned surface. Spraying an activation solution onto the substrate surface followed by high-temperature flame treatment effectively ensures that aluminum chloride, sodium methyl methacrylate, and hydrolyzed polymaleic anhydride work together to impart a large number of active groups to the solar cell substrate surface. Anodizing is then performed on the frame substrate to create an anodic oxide film. Sealing the anodic oxide film effectively seals the surface pores. Surface modification of the sealed anodic oxide film further enhances its hydrophobic properties. The sealed and surface-modified anodic oxide film serves as a protective layer for the solar cell frame substrate. Detailed Implementation

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0026] This invention provides a corrosion-resistant solar panel frame, comprising a frame substrate and a protective layer. The protective layer is disposed on the surface of the frame substrate, and the thickness ratio of the protective layer to the frame substrate is 1:90. The protective layer includes an anodic oxide film. The base solution of the anodic oxide film, calculated by weight percentage, comprises: 17% sulfuric acid, 1.1% aluminum sulfate, 1.4% glycerol, and the remainder being deionized water. The activation solution, calculated by weight percentage, comprises: 4.2% aluminum chloride, 1.3% sodium methacrylate sulfonate, 0.4% hydrolyzed polymaleic anhydride, and the remainder being deionized water. The sealing agent, calculated by weight percentage, comprises: 0.7% potassium dichromate, 3.6% ammonium fluorotitanate, and the remainder being deionized water. The surface modifier, calculated by weight percentage, comprises: 0.9% stearic acid, and the remainder being an ethanol solution with a concentration of 40%.

[0027] This invention also provides a method for preparing a corrosion-resistant solar panel frame, the specific preparation steps of which are as follows:

[0028] Step 1: Weigh out the sulfuric acid, aluminum sulfate, glycerol, and deionized water from the base solution of the anodic oxide film; weigh out the aluminum chloride, sodium methyl methacrylate, hydrolyzed polymaleic anhydride, and deionized water from the activation solution; weigh out the potassium dichromate, ammonium fluorotitanate, and deionized water from the sealing agent; weigh out the stearic acid and ethanol solution from the surface modifier.

[0029] Step 2: The sulfuric acid, aluminum sulfate, glycerol, and deionized water in the base solution of the anodic oxide film from Step 1 are mixed and stirred for 30 minutes to obtain the base solution of the anodic oxide film; the aluminum chloride, sodium methacrylate sulfonate, hydrolyzed polymaleic anhydride, and deionized water in the activation solution are ultrasonically vibrated for 15 minutes, followed by high-temperature flame treatment for 4 seconds to obtain the activation solution; the potassium dichromate, ammonium fluorotitanate, and deionized water in the sealing agent are mixed and stirred for 30 minutes to obtain the sealing agent; the stearic acid and ethanol solution in the surface modifier are mixed and stirred for 30 minutes to obtain the surface modifier.

[0030] Step 3: Perform laser cleaning on the surface of the frame substrate to obtain a pre-treated frame substrate;

[0031] Step 4: Spray the activation solution from Step 2 evenly onto the pretreated frame substrate surface, and then perform high-temperature flame treatment for 4 seconds to obtain a surface-activated frame substrate.

[0032] Step 5: Add the surface-activated border substrate to the base solution of the anodic oxide film in Step 2, and perform anodic oxidation treatment to obtain a border substrate with an anodic oxide film on its surface;

[0033] Step 6: Add the frame substrate with anodized film on the surface from Step 5 to the sealing agent from Step 2, and ultrasonically treat it in a water bath for 30 minutes to obtain a frame substrate with anodized film on the surface for sealing.

[0034] Step 7: Add the frame substrate with the surface sealing anodized film from Step 6 to the surface modifier from Step 2, let it stand for 30 minutes, take it out and put it into a drying oven for curing for 2.0 hours to form a protective layer on the surface of the frame substrate, thus obtaining an anti-corrosion solar frame.

[0035] In step two, the mixing and stirring speed is 450 r / min, the ultrasonic frequency is 1.4 MHz, the ultrasonic power is 400 W, and high-temperature flame treatment is performed at 580℃; in step three, the laser processing has an average laser power of 130 W, a scanning speed of 3400 mm / s, and one cleaning cycle; in step four, the active liquid spraying volume is 380 mL / m 2 The process involves high-temperature flame treatment at 580℃; in step five, the base liquid temperature is -5℃ and the anodizing current density is 2.3A / dm³. 2 The anodizing treatment time is 60 min; in step six, the water bath temperature is 60℃, the ultrasonic frequency is 1.3MHz, and the ultrasonic power is 300W; in step seven, the drying oven temperature is 110℃. Example 2

[0036] Unlike Example 1, the thickness ratio of the protective layer to the frame substrate is 1:100. The protective layer includes an anodic oxide film. The base solution of the anodic oxide film, calculated by weight percentage, includes: 19% sulfuric acid, 1.3% aluminum sulfate, 1.6% glycerol, and the remainder is deionized water. The activation solution, calculated by weight percentage, includes: 4.6% aluminum chloride, 1.5% sodium methacrylate sulfonate, 0.6% hydrolyzed polymaleic anhydride, and the remainder is deionized water. The sealing agent, calculated by weight percentage, includes: 0.9% potassium dichromate, 3.8% ammonium fluorotitanate, and the remainder is deionized water. The surface modifier, calculated by weight percentage, includes: 1.1% stearic acid, and the remainder is an ethanol solution with a concentration of 60%. Example 3

[0037] Unlike Examples 1-2, the thickness ratio of the protective layer to the frame substrate is 1:95. The protective layer includes an anodic oxide film. The base solution of the anodic oxide film, calculated by weight percentage, includes: 18% sulfuric acid, 1.2% aluminum sulfate, 1.5% glycerol, and the remainder is deionized water. The activation solution, calculated by weight percentage, includes: 4.4% aluminum chloride, 1.4% sodium methacrylate sulfonate, 0.5% hydrolyzed polymaleic anhydride, and the remainder is deionized water. The sealing agent, calculated by weight percentage, includes: 0.8% potassium dichromate, 3.7% ammonium fluorotitanate, and the remainder is deionized water. The surface modifier, calculated by weight percentage, includes: 1.0% stearic acid, and the remainder is an ethanol solution with a concentration of 50%. Example 4

[0038] Unlike Example 3, in step two, the mixing and stirring speed was 530 r / min, the ultrasonic frequency was 1.6 MHz, the ultrasonic power was 500 W, and high-temperature flame treatment was performed at 620°C; in step three, the average laser power of the laser processing was 150 W, the scanning speed was 3600 mm / s, and the number of cleaning cycles was 2; in step four, the amount of active liquid sprayed was 400 mL / m 2 The process involves high-temperature flame treatment at 620℃; in step five, the base liquid temperature is -2℃ and the anodizing current density is 2.7A / dm³. 2 The anodizing treatment time is 80 min; in step six, the water bath temperature is 80℃, the ultrasonic frequency is 1.5MHz, and the ultrasonic power is 400W; in step seven, the drying oven temperature is 130℃. Example 5

[0039] Unlike Example 3, in step two, the mixing and stirring speed was 490 r / min, the ultrasonic frequency was 1.5 MHz, the ultrasonic power was 450 W, and high-temperature flame treatment was performed at 600 °C; in step three, the average laser power of the laser processing was 140 W, the scanning speed was 3500 mm / s, and the number of cleaning cycles was 1; in step four, the amount of active liquid sprayed was 390 mL / m 2 The process involves high-temperature flame treatment at 600℃; in step five, the base liquid temperature is -3℃ and the anodizing current density is 2.5A / dm³. 2 The anodizing treatment time is 70 min; in step six, the water bath temperature is 70℃, the ultrasonic frequency is 1.4MHz, and the ultrasonic power is 350W; in step seven, the drying oven temperature is 120℃.

[0040] Comparative Example 1:

[0041] Unlike Example 3, no activation solution was used.

[0042] Comparative Example 2:

[0043] Unlike Example 3, no surface modifier was used.

[0044] Comparative Example 3:

[0045] Unlike Example 3, the operation in step three is not included.

[0046] In the above embodiments and comparative examples, the frame substrate material was 7075 aluminum alloy; sulfuric acid was purchased from Sinopharm Chemical Reagent Co., Ltd., brand: HuShi, Sinopharm code: 10021608; aluminum sulfate was purchased from Sigma-Aldrich (Shanghai) Trading Co., Ltd., item number: 202614; glycerol was purchased from Sigma-Aldrich (Shanghai) Trading Co., Ltd., item number: G0400006; aluminum chloride was purchased from Sinopharm Chemical Reagent Co., Ltd., brand: HuShi, Sinopharm code: 10010618; sodium methyl allyl sulfonate was purchased from Sigma-Aldrich (Shanghai) Trading Co., Ltd. Yi Co., Ltd., item number: 186082; hydrolyzed polymaleic anhydride was purchased from Wuhan Kanos Technology Co., Ltd., item number: 04401; potassium dichromate was purchased from Sinopharm Chemical Reagent Co., Ltd., brand: Hushi, Sinopharm code: 10016618; ammonium fluorotitanate was purchased from Sigma-Aldrich (Shanghai) Trading Co., Ltd., item number: 204749; stearic acid was purchased from Sigma-Aldrich (Shanghai) Trading Co., Ltd., item number: W303518; ethanol was purchased from Sinopharm Chemical Reagent Co., Ltd., brand: Hushi, Sinopharm code: 10009218;

[0047] The anti-corrosion solar cell frames in the comparative examples and embodiments of this invention were tested. First, an automatic potential polarization test was performed on the solar cell frames. The test period was 30 days, the scanning range was -250mV to 1000mV (vs. OCP), and the scanning rate was 0.3333mV / s. Then, the measured polarization curves were fitted using C-View software to obtain the self-corrosion potential A and self-corrosion current density B of the solar cell frames in the comparative examples and embodiments.

[0048] The solar panel frame is then pretreated under the following conditions: light intensity of 200,000 lx and temperature of 60℃ and -20℃, which are switched every 12 hours. At the same time, gravel is dropped from a height of 1 meter above the solar panel frame and freely impacts the surface of the solar panel frame. The gravel particle size is 1.7-2.2 mm. The gravel impacts once per hour, with a total weight of 0.5 kg for each impact. The pretreatment time is 120 hours.

[0049] After pretreatment, an automatic potential polarization test was performed on the solar frame. The test period was 30 days, the scanning range was -250mV to 1000mV (vs. OCP), and the scanning rate was 0.3333mV / s. Then, the measured polarization curve was fitted using C-View software to obtain the self-corrosion potential C and self-corrosion current density D of the solar frame in the comparative example and the embodiment.

[0050] Calculate the self-corrosion potential loss E = (AC) / A * 100%;

[0051] Calculate the self-corrosion current density loss F = (BD) / B * 100%;

[0052] The results are shown in Table 1:

[0053] Table 1:

[0054]

[0055] As shown in the table above, the anti-corrosion solar panel frame of the present invention can effectively improve its own anti-corrosion performance, while ensuring its safety and stability when used in environments with large temperature differences and strong winds and sandstorms, thereby ensuring its service life.

[0056] In this invention, the activation solution is applied to the surface of the solar cell substrate. Aluminum chloride, sodium methyl propylene sulfonate, and hydrolyzed polymaleic anhydride work together to impart a large number of active groups to the solar cell substrate surface. This enhances the adhesion of the subsequent protective layer to the substrate surface, while also ensuring the adhesion between particles within the protective layer and reducing porosity. This effectively prevents the protective layer from peeling off at high temperatures, ensuring its durability and extending the lifespan of the solar cell frame. The anodic oxide film base solution is used to form an anodic oxide film on the solar cell substrate surface. Sulfuric acid, aluminum sulfate, glycerol, and deionized water work together to form a double-layer anodic oxide film on the solar cell substrate surface. The anodic oxide film consists of two layers: an inner barrier layer, which is thin, dense, and has high electrical resistance; and an outer porous layer, which is thicker, loose, and has low electrical resistance. A sealing agent is then used to seal the pores of the anodic oxide film, effectively sealing the pores on the outer surface. The alumina in the oxide film and the pore walls reacts chemically with a highly oxidizing potassium dichromate solution to form basic aluminum chromate or basic aluminum dichromate. This hydration of the oxide film increases its volume and seals the pores. This combined effect of product sealing and passivation effectively improves the corrosion resistance of the anodic oxide film. Ammonium fluorotitanate generates Ti(OH)₄ during the sealing process, which fills the pores and effectively improves the corrosion resistance of the anodic oxide film. The film exhibits good density and hydrophobicity, resulting in improved corrosion resistance. The stearic acid and ammonium fluorotitanate in the surface modifier work together to modify the surface of the sealed anodic oxide film, forming a micro-nano rough structure with low surface energy. This improves hydrophobicity, reduces the corrosion contact area, inhibits corrosion, and further enhances corrosion resistance. In step one, various raw materials are weighed. In step two, the raw materials are prepared into a reagent for use. In step three, the frame substrate surface undergoes laser cleaning. During the cleaning process, the frame substrate surface undergoes thermal oxidation, effectively improving the corrosion resistance of the cleaned surface. In step four, the activation solution is sprayed onto... The substrate surface is then subjected to high-temperature flame treatment, which effectively ensures that aluminum chloride, sodium methacrylate, and hydrolyzed polymaleic anhydride work together to impart a large number of active groups to the surface of the solar cell substrate. In step five, the frame substrate is anodized to produce an anodic oxide film. In step six, the anodic oxide film is sealed to effectively seal the surface pores. In step seven, the sealed anodic oxide film is surface modified to effectively enhance its surface hydrophobic properties. The anodic oxide film, after sealing and surface modification, serves as a protective layer for the solar cell frame substrate.

[0057] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A corrosion-resistant solar panel frame, characterized in that: The device includes a frame substrate and a protective layer. The protective layer is disposed on the surface of the frame substrate, and the thickness ratio of the protective layer to the frame substrate is 1:90-100. The protective layer includes an anodic oxide film, and the base solution of the anodic oxide film, calculated by weight percentage, includes: 17-19% sulfuric acid, 1.1-1.3% aluminum sulfate, 1.4-1.6% glycerol, and the remainder is deionized water. It also includes an activating solution, a sealing agent, and a surface modifier. The activating solution, calculated by weight percentage, includes: 4.2-4.6% chloride... The composition includes aluminum, 1.3-1.5% sodium methacrylate sulfonate, 0.4-0.6% hydrolyzed polymaleic anhydride, and the remainder is deionized water; the sealing agent, by weight percentage, includes: 0.7-0.9% potassium dichromate, 3.6-3.8% ammonium fluorotitanate, and the remainder is deionized water; the surface modifier, by weight percentage, includes: 0.9-1.1% stearic acid, and the remainder is an ethanol solution; the concentration of the ethanol solution is 40-60%; the preparation method of the anti-corrosion solar cell frame is as follows: Step 1: Weigh out the sulfuric acid, aluminum sulfate, glycerol, and deionized water from the base solution of the anodic oxide film; weigh out the aluminum chloride, sodium methyl methacrylate, hydrolyzed polymaleic anhydride, and deionized water from the activation solution; weigh out the potassium dichromate, ammonium fluorotitanate, and deionized water from the sealing agent; weigh out the stearic acid and ethanol solution from the surface modifier. Step 2: The sulfuric acid, aluminum sulfate, glycerol, and deionized water in the base solution of the anodic oxide film from Step 1 are mixed and stirred for 20-40 minutes to obtain the base solution of the anodic oxide film. The aluminum chloride, sodium methacrylate, hydrolyzed polymaleic anhydride, and deionized water in the activation solution are ultrasonically vibrated for 10-20 minutes, followed by high-temperature flame treatment for 3-5 seconds to obtain the activation solution. The potassium dichromate, ammonium fluorotitanate, and deionized water in the sealing agent are mixed and stirred for 20-40 minutes to obtain the sealing agent. The stearic acid and ethanol solution in the surface modifier are mixed and stirred for 20-40 minutes to obtain the surface modifier. Step 3: Perform laser cleaning on the surface of the frame substrate to obtain a pre-treated frame substrate; Step 4: Spray the activation solution from Step 2 evenly onto the pretreated frame substrate surface, and then perform high-temperature flame treatment for 3-5 seconds to obtain a surface-activated frame substrate. Step 5: Add the surface-activated border substrate to the base solution of the anodic oxide film in Step 2, and perform anodic oxidation treatment to obtain a border substrate with an anodic oxide film on its surface; Step 6: Add the frame substrate with anodized film on the surface from Step 5 to the sealing agent from Step 2, and ultrasonically treat it in a water bath for 20-40 minutes to obtain a frame substrate with anodized film on the surface for sealing. Step 7: Add the frame substrate with the surface sealing anodized film from Step 6 to the surface modifier from Step 2, let it stand for 20-40 minutes, take it out and put it into a drying oven for curing for 1.5-2.5 hours to form a protective layer on the surface of the frame substrate, thus obtaining an anti-corrosion solar frame.

2. The anti-corrosion solar panel frame according to claim 1, characterized in that: The thickness ratio of the protective layer to the frame substrate is 1:

90. The protective layer includes an anodic oxide film. The base solution of the anodic oxide film, calculated by weight percentage, includes: 17% sulfuric acid, 1.1% aluminum sulfate, 1.4% glycerol, and the remainder is deionized water. The activation solution, calculated by weight percentage, includes: 4.2% aluminum chloride, 1.3% sodium methacrylate sulfonate, 0.4% hydrolyzed polymaleic anhydride, and the remainder is deionized water. The sealing agent, calculated by weight percentage, includes: 0.7% potassium dichromate, 3.6% ammonium fluorotitanate, and the remainder is deionized water. The surface modifier, calculated by weight percentage, includes: 0.9% stearic acid, and the remainder is an ethanol solution; the concentration of the ethanol solution is 40%.

3. The anti-corrosion solar panel frame according to claim 1, characterized in that: The thickness ratio of the protective layer to the frame substrate is 1:

100. The protective layer includes an anodic oxide film. The base solution of the anodic oxide film, calculated by weight percentage, includes: 19% sulfuric acid, 1.3% aluminum sulfate, 1.6% glycerol, and the remainder is deionized water. The activation solution, calculated by weight percentage, includes: 4.6% aluminum chloride, 1.5% sodium methacrylate sulfonate, 0.6% hydrolyzed polymaleic anhydride, and the remainder is deionized water. The sealing agent, calculated by weight percentage, includes: 0.9% potassium dichromate, 3.8% ammonium fluorotitanate, and the remainder is deionized water. The surface modifier, calculated by weight percentage, includes: 1.1% stearic acid, and the remainder is an ethanol solution; the concentration of the ethanol solution is 60%.

4. The anti-corrosion solar panel frame according to claim 1, characterized in that: The thickness ratio of the protective layer to the frame substrate is 1:

95. The protective layer includes an anodic oxide film. The base solution of the anodic oxide film, calculated by weight percentage, includes: 18% sulfuric acid, 1.2% aluminum sulfate, 1.5% glycerol, and the remainder is deionized water. The activation solution, calculated by weight percentage, includes: 4.4% aluminum chloride, 1.4% sodium methacrylate sulfonate, 0.5% hydrolyzed polymaleic anhydride, and the remainder is deionized water. The sealing agent, calculated by weight percentage, includes: 0.8% potassium dichromate, 3.7% ammonium fluorotitanate, and the remainder is deionized water. The surface modifier, calculated by weight percentage, includes: 1.0% stearic acid, and the remainder is an ethanol solution; the concentration of the ethanol solution is 50%.

5. The anti-corrosion solar panel frame according to claim 1, characterized in that: In step two, the mixing and stirring speed is 450–530 r / min, the ultrasonic frequency is 1.4–1.6 MHz, the ultrasonic power is 400–500 W, and high-temperature flame treatment is performed at 580–620 °C. In step three, the laser processing uses an average laser power of 130–150 W, a scanning speed of 3400–3600 mm / s, and 1–2 cleaning cycles. In step four, the active liquid spraying volume is 380–400 mL / m. 2 High-temperature flame treatment is performed at 580–620℃; in step five, the base liquid temperature is -5 to -2℃, and the anodizing current density is 2.3–2.7 A / dm³. 2 The anodizing treatment time is 60-80 min; in step six, the water bath temperature is 60-80℃, the ultrasonic frequency is 1.3-1.5MHz, and the ultrasonic power is 300-400W; in step seven, the drying oven temperature is 110-130℃.

6. The anti-corrosion solar panel frame according to claim 5, characterized in that: In step two, the mixing and stirring speed is 450 r / min, the ultrasonic frequency is 1.4 MHz, the ultrasonic power is 400 W, and high-temperature flame treatment is performed at 580℃; in step three, the laser processing has an average laser power of 130 W, a scanning speed of 3400 mm / s, and one cleaning cycle; in step four, the active liquid spraying volume is 380 mL / m 2 The process involves high-temperature flame treatment at 580℃; in step five, the base liquid temperature is -5℃ and the anodizing current density is 2.3A / dm³. 2 The anodizing treatment time is 60 min; in step six, the water bath temperature is 60℃, the ultrasonic frequency is 1.3MHz, and the ultrasonic power is 300W; in step seven, the drying oven temperature is 110℃.

7. A corrosion-resistant solar panel frame according to claim 5, characterized in that: In step two, the mixing and stirring speed is 530 r / min, the ultrasonic frequency is 1.6 MHz, the ultrasonic power is 500 W, and high-temperature flame treatment is performed at 620℃; in step three, the laser processing has an average laser power of 150 W, a scanning speed of 3600 mm / s, and two cleaning cycles; in step four, the active liquid spraying volume is 400 mL / m 2 The process involves high-temperature flame treatment at 620℃; in step five, the base liquid temperature is -2℃ and the anodizing current density is 2.7A / dm³. 2 The anodizing treatment time is 80 min; in step six, the water bath temperature is 80℃, the ultrasonic frequency is 1.5MHz, and the ultrasonic power is 400W; in step seven, the drying oven temperature is 130℃.

8. A corrosion-resistant solar panel frame according to claim 5, characterized in that: In step two, the mixing and stirring speed is 490 r / min, the ultrasonic frequency is 1.5 MHz, the ultrasonic power is 450 W, and high-temperature flame treatment is performed at 600℃; in step three, the laser processing has an average laser power of 140 W, a scanning speed of 3500 mm / s, and one cleaning cycle; in step four, the active liquid spraying volume is 390 mL / m 2 The process involves high-temperature flame treatment at 600℃; in step five, the base liquid temperature is -3℃ and the anodizing current density is 2.5A / dm³. 2 The anodizing treatment time is 70 min; in step six, the water bath temperature is 70℃, the ultrasonic frequency is 1.4MHz, and the ultrasonic power is 350W; in step seven, the drying oven temperature is 120℃.

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