Device and method for stabilizing the rust layer on the surface of weathering steel photovoltaic support

Abstract

The present invention discloses a processing device and method for stabilizing the rust layer on the surface of a weathering steel photovoltaic support. The processing device includes a solution tank, a traction assembly and a drying assembly. The solution tank includes a first solution tank for storing an alkaline washing solution, a second solution tank for storing deionized water and a third solution tank for storing a stabilizing solution. The first solution tank, the second solution tank and the third solution tank are all equipped with heating pipes. The traction assembly can drive the photovoltaic support to enter and exit the first solution tank, the second solution tank, the third solution tank and the drying assembly. The present invention can realize the online stabilization treatment of the rust layer on the surface of a weathering steel photovoltaic support, realize industrialized, rapid and batch processing, and solve the problem that it is difficult to carry out stabilization treatment of the rust layer on the special-shaped components of the weathering steel photovoltaic support.

Description

Technical Field

[0001] The present invention belongs to the field of corrosion and protection technology, and relates to a surface treatment technology for weathering steel, and specifically refers to a treatment device and method for stabilizing the rust layer on the surface of a weathering steel photovoltaic bracket. Background Art

[0002] The photovoltaic industry has entered a period of rapid explosive growth. Traditional photovoltaic bracket materials mainly use galvanized, galvanized aluminum-magnesium and other steels. In recent years, weathering steel has gradually been promoted in the field of photovoltaic bracket materials due to its advantages such as short processing cycle, green environmental protection, and weather resistance. Weathering steel has high atmospheric corrosion resistance, which is due to the stable and dense rust layer generated on its surface. This rust layer will inhibit the penetration of corrosive media into the carbon steel matrix, thereby greatly reducing the corrosion thinning of the steel plate. However, it is difficult for weathering steel to form a stable and dense rust layer in a high temperature, high humidity, high pollution, and high chloride ion environment, resulting in a safety risk of continuous thinning.

[0003] In order to form a dense, stable and protective rust layer on the surface of weathering steel, a large number of studies on accelerated rust layer stabilization have been carried out at home and abroad. The main purpose is to shorten the time for weathering steel to form a stable rust layer and reduce the phenomenon of rust liquid dripping on the surface of weathering steel. At present, the treatment method for accelerated rust layer stabilization is mainly chemical treatment, and the treatment methods are mostly manual brushing and spraying, and industrial online treatment has not been realized. Moreover, most of the small components of photovoltaic brackets are C-shaped steel, and it is difficult to achieve treatment in the C-shaped steel groove. Therefore, it can be seen that when using the above treatment method to accelerate the rust layer stabilization treatment of weathering steel photovoltaic brackets, there are problems such as long treatment cycle, low efficiency, and difficulty in treatment.

[0004] Among the existing applied patents, the patent applied by China Railway 11th Bureau Group is "A weathering steel rust layer stabilization test device and its test method (CN20211111299.4)". The experimental device has a simple structure, the test method is easy to operate, and the feasibility is high. It can simulate the whole process of weathering steel rust layer stabilization, analyze the factors affecting the stability of weathering steel rust layer and control measures, and provide a scientific basis for the subsequent rust layer stabilization treatment of weathering steel beams. The patent applied by Shougang Group is "A weathering steel rust layer stabilization treatment solution spraying device (CN201721710315.0)". The device includes an electric sprayer, a rubber tube, a handle switch, a stainless steel spray rod, an atomizing nozzle and a recycler. There is a switch on the electric sprayer, one end of the rubber tube is connected to the recycler, and the other end passes through the electric sprayer and is connected to the handle switch. There is an atomizing nozzle at the top of the stainless steel spray rod. The patent applied for by the University of Science and Technology Beijing is "A liquid spray treatment method for promoting the formation of a stable rust layer on scaled steel (CN201310557047.3)". 0.3% to 2% FeSO4, 0.5% to 3% CuSO4, 0.3% to 2% NaHSO3, 0.5% to 3% Na2SiO3 and 0.5% to 3% tannic acid are mixed with water and stirred evenly to obtain a surface treatment agent for steel. The surface treatment agent is sprayed on the surface of the steel with oxide scale to form a chemical adsorption layer on the steel surface.

[0005] The above technology mainly describes the test device and treatment liquid for the formation of stable rust layer on weathering steel. The treatment device is a spraying device and the method is a spraying method. It does not involve a device and method of use that accelerates the formation of stable rust layer on weathering steel photovoltaic brackets with a short treatment cycle and higher efficiency. Summary of the invention

[0006] In order to solve the above technical problems, the purpose of the present invention is to provide a processing device and method for stabilizing the rust layer on the surface of a weathering steel photovoltaic bracket. It can realize the online stabilization treatment of the rust layer on the surface of a weathering steel photovoltaic bracket, realize industrialized, rapid and batch processing, and solve the problem that it is difficult to stabilize the rust layer of special-shaped components of a weathering steel photovoltaic bracket.

[0007] To achieve the above object, the technical solution of the present invention is as follows:

[0008] On the one hand, the present invention provides a processing device for stabilizing the rust layer on the surface of a weathering steel photovoltaic bracket, comprising a solution tank, a traction assembly and a drying assembly, the solution tank comprising a first solution tank for storing an alkaline washing solution, a second solution tank for storing deionized water and a third solution tank for storing a stabilizing solution, the first solution tank, the second solution tank and the third solution tank are all provided with heating pipes, and the traction assembly can drive the photovoltaic bracket to enter and exit the first solution tank, the second solution tank, the third solution tank and the drying assembly.

[0009] Preferably, the chemical components of the alkaline washing solution include by mass percentage: 10-20% sodium hydroxide, 5-10% sodium carbonate, 2-5% sodium phosphate, 5-10% sodium metasilicate, 1-5% alkyl polyoxyethylene ether phosphate ester salt, 1-3% polyether type defoamer, and the balance is deionized water. Further, the chemical components of the alkaline washing solution include by mass percentage: 18% sodium hydroxide, 6% sodium carbonate, 4% sodium phosphate, 9% sodium metasilicate, 4% alkyl polyoxyethylene ether phosphate ester salt, 2.5% polyether type defoamer, and the balance is deionized water.

[0010] Preferably, the chemical composition of the stabilizing solution includes, by mass percentage, 3-9% iron sulfate, 5-10% chromium sulfate, 3-8% sulfuric acid, and the balance is deionized water. Further, the chemical composition of the stabilizing solution includes, by mass percentage, 8% iron sulfate, 7% chromium sulfate, 7% sulfuric acid, and the balance is deionized water.

[0011] Preferably, the traction assembly comprises an overhead crane and a pylon, the overhead crane is used to provide traction, the pylon is connected to the overhead crane, and the pylon is used to hang the photovoltaic bracket.

[0012] Preferably, the drying component comprises a drying box and a heater, the top of the drying box is provided with an opening for the photovoltaic bracket to enter and exit, the heater is arranged adjacent to the drying box, and the air outlet of the heater is aligned with the air inlet on the side wall of the drying box.

[0013] On the other hand, the present invention provides a method for using the treatment device for stabilizing the rust layer on the surface of a weathering steel photovoltaic support in the above scheme, comprising:

[0014] Alkaline washing solution and stabilizing solution are prepared according to a set ratio, and the alkaline washing solution, deionized water and stabilizing solution are added to the first solution tank, the second solution tank and the third solution tank respectively;

[0015] The three tanks are heated by a heating tube, and the temperatures of the first solution tank, the second solution tank, and the third solution tank are controlled to be 50-70°C, 20-40°C, and 30-50°C, respectively;

[0016] Place the photovoltaic bracket on the bracket, control the overhead crane to pull the bracket into the first solution tank, the second solution tank, and the third solution tank in turn, and control the immersion time of the photovoltaic bracket in the first solution tank, the second solution tank, and the third solution tank to be 5 to 10 minutes, 3 to 5 minutes, and 10 to 15 minutes respectively;

[0017] The photovoltaic bracket after soaking is placed in a drying oven for drying. The temperature in the oven is controlled at 60-80°C and the drying time is controlled at 5-10 minutes.

[0018] The dried photovoltaic bracket is removed from the bracket, and the stabilization treatment of the rust layer on the surface of the weathering steel photovoltaic bracket is completed.

[0019] The technical principle of the treatment device and method for stabilizing the rust layer on the surface of the weathering steel photovoltaic bracket of the present invention is as follows:

[0020] The present invention realizes the online stabilization treatment of the rust layer on the surface of the weathering steel photovoltaic bracket. The first step is to perform alkali washing on the photovoltaic bracket to remove the surface oil stains, the second step is to use deionized water to wash the alkali washing liquid residue on the surface of the photovoltaic bracket, the third step is to perform stabilization treatment on the photovoltaic bracket, and finally the photovoltaic bracket is placed in a drying oven for drying.

[0021] Sodium hydroxide, sodium carbonate and sodium phosphate are selected as the main alkaline components of the alkaline washing solution, among which sodium hydroxide is a strong base that directly undergoes saponification reaction with oil stains, and sodium carbonate and sodium phosphate are weak bases that can slowly hydrolyze to provide reaction ions; sodium metasilicate is used as a chelating agent to undergo complexation reaction with iron powder on the surface of the photovoltaic bracket; alkyl polyoxyethylene ether phosphate salt is used as a surfactant to reduce the contact angle of oil stains on the surface of the photovoltaic bracket, which is beneficial to the removal of oil stains; the addition of polyether defoaming agent reduces the generation of foam during the alkaline washing process. The limiting principles of each component in the alkaline washing solution are as follows: the ratio of strong alkali components to weak alkali components is controlled at about 2:1, which can ensure the saponification reaction rate of the alkaline washing solution and oil stains and the continuous alkaline washing effect. Therefore, the sodium hydroxide content is limited to 10-20%, the sodium carbonate content is limited to 5-10%, and the sodium phosphate content is limited to 2-5%; due to the low iron powder content on the surface of the photovoltaic bracket, the content of sodium metasilicate as a chelating agent is limited to 5-10%; surfactants are additives, and the minimum content in the alkaline washing solution is 1%. Excessive content pushes up the price of the alkaline washing solution, so the content of alkyl polyoxyethylene ether phosphate salt is limited to 1-5%; the defoaming agent is added according to the ratio of the main alkali content, usually around 10:1, so the polyether defoaming agent is limited to 1-3%.

[0022] Three substances, namely, iron sulfate, chromium sulfate and sulfuric acid, are selected from the components of the stabilizing liquid. First, the acidity of sulfuric acid is used to corrode the iron oxide scale on the surface of the photovoltaic bracket, and then the corrosiveness of sulfate and trivalent iron ions in the three substances is used to accelerate the rusting of the steel plate surface, and finally the chromium ions are used to promote the phase transformation of the rust layer and stabilize the rust layer, thereby completing the stabilization treatment of the photovoltaic bracket. The limiting principle of each component in the stabilizing liquid is as follows: sulfuric acid is a strong acid, which mainly reacts with the iron oxide scale on the surface of the photovoltaic bracket. A low addition amount cannot achieve the effect of removing the iron oxide scale, and excessive addition will cause the substrate to be corroded, so the sulfuric acid content is limited to 3-8%; the trivalent iron ions in iron sulfate are used to react quickly with the steel plate to rust, and also have a certain corrosive effect on the steel plate, so the content of iron sulfate is limited to 3-9%; the chromium element in chromium sulfate has a stabilizing effect on the rust layer, but the price is relatively high, so the chromium sulfate content is limited to 5-10% of chromium sulfate.

[0023] The process parameter limiting principle in the treatment device for stabilizing the rust layer on the surface of the weathering steel photovoltaic bracket of the present invention is as follows: the device of the present invention is an online stabilization treatment device for the rust layer on the surface of the weathering steel photovoltaic bracket. In order to improve the reaction effect of the photovoltaic bracket in the first solution tank, the second solution tank, and the third solution tank, it is necessary to control the solution temperature in the three tanks. Since the alkali washing effect increases rapidly with the increase of the temperature of the alkali washing solution, the main alkali is gentle, the effect is significantly improved before 50°C, and the effect is slowly improved after 70°C, so the alkali washing solution temperature of the first solution tank is limited to 50-70°C. The second solution tank is used to clean and remove the alkali washing solution residue on the surface of the photovoltaic bracket. Since the alkali washing solution components used are easily soluble in water, the alkali washing solution residue can be removed at room temperature, so the alkali washing solution temperature of the second solution tank is limited to 20-40°C. The reaction speed of the stabilizing solution is greatly improved at a higher temperature, but the volatilization of the solution increases after the temperature exceeds 50°C, so the alkali washing solution temperature of the third solution tank is limited to 30-50°C. The drying oven is used to dry the photovoltaic bracket after treatment. The temperature inside the oven is set at a higher temperature. During the drying process, the surface rust layer continues to react, making the rust layer denser and more stable. Ensure that the drying time is sufficient to allow the internal reaction of the rust layer to be sufficient. Therefore, the temperature inside the oven is limited to 60-80℃ and the drying time is 5-10 minutes.

[0024] The stable rust layer obtained by using the processing device and method for stabilizing the rust layer on the surface of the weathering steel photovoltaic bracket of the present invention has the following technical parameters: (1) the thickness of the rust layer on the surface of the photovoltaic bracket is greater than 50 μm; (2) the color difference value ΔE of the rust layer on the surface of the photovoltaic bracket is less than 10; (3) the rust layer on the surface of the photovoltaic bracket is brown; (4) the resistance value of the rust layer on the surface of the photovoltaic bracket is greater than 1000 Ω.cm 2 .

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] (1) The present invention realizes the online stabilization treatment of the rust layer on the surface of the weathering steel photovoltaic bracket, and realizes the industrialized, rapid and batch processing of the photovoltaic bracket.

[0027] (2) The device for treating the rust layer on the surface of a weathering steel photovoltaic bracket of the present invention has the characteristics of reasonable structural design, easy implementation, and low construction cost.

[0028] (3) The present invention uses a dip coating method to perform rust stabilization treatment on the weathering steel photovoltaic bracket, which is suitable for various special-shaped components and sizes of photovoltaic brackets, and ensures the uniformity of the dip coating stabilizer in various areas of the photovoltaic bracket surface.

[0029] (4) The stable rust layer obtained by using the processing device and method for stabilizing the rust layer on the surface of the weathering steel photovoltaic bracket of the present invention has the characteristics of uniform color, density and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of a processing device for stabilizing the rust layer on the surface of a weathering steel photovoltaic support according to the present invention.

[0031] Numbers in the figure: 1-solution tank; 11-first solution tank; 12-second solution tank; 13-third solution tank; 2-heating tube; 3-traction component; 31-hanging rack; 4-drying component; 41-drying box; 42-heater; 5-photovoltaic bracket. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred implementation scheme of the present invention is described below in conjunction with specific examples, but it should not be understood as a limitation of this patent.

[0033] The experimental methods or test methods described in the following examples are conventional methods unless otherwise specified; the reagents and materials are obtained from conventional commercial channels or prepared by conventional methods unless otherwise specified.

[0034] like Figure 1 As shown, the present invention is a processing device for stabilizing the rust layer on the surface of a weathering steel photovoltaic bracket, the processing device includes a solution tank 1, a traction component 3 and a drying component 4, the solution tank 1 includes a first solution tank 11 for storing an alkaline washing solution, a second solution tank 12 for storing deionized water and a third solution tank 13 for storing a stabilizing solution, the first solution tank 11, the second solution tank 12 and the third solution tank 13 are all provided with a heating pipe 2, the traction component 3 can drive the photovoltaic bracket 5 to enter and exit the first solution tank 11, the second solution tank 12, the third solution tank 13 and the drying component 4.

[0035] The traction assembly 3 includes a crane and a pylon 31. The crane is used to provide traction, and the pylon 31 is connected to the crane. The pylon 31 is used to hang the photovoltaic bracket 5. The crane is used to drive the pylon 31 to achieve horizontal and vertical displacement, and its specific structure can be selected conventionally. Multiple layers of photovoltaic brackets 5 are hung on the pylon, and the specific hanging structure can be a hook or other structure that can fix the photovoltaic bracket 5.

[0036] The drying assembly 4 includes a drying box 41 and a heater 42 . An opening for the photovoltaic bracket 5 to enter and exit is provided at the top of the drying box 41 . The heater 42 is arranged adjacent to the drying box 41 , and the air outlet of the heater 42 is aligned with the air inlet on the side wall of the drying box 41 .

[0037] Based on the above structure, the present invention provides a method for using a processing device, comprising:

[0038] (1) Alkaline washing solution and stabilizing solution are prepared in a set ratio, and the alkaline washing solution, deionized water, and stabilizing solution are added to the first solution tank 11, the second solution tank 12, and the third solution tank 13 respectively;

[0039] (2) The three tanks are heated by the heating tube 2, and the temperatures of the first solution tank 11, the second solution tank 12, and the third solution tank 13 are controlled to be 50-70° C., 20-40° C., and 30-50° C., respectively;

[0040] (3) placing the photovoltaic bracket 5 on the bracket 31, controlling the overhead crane to pull the bracket 31 into the first solution tank 11, the second solution tank 12, and the third solution tank 13 in sequence, and controlling the immersion time of the photovoltaic bracket 5 in the first solution tank 11, the second solution tank 12, and the third solution tank 13 to be 5 to 10 minutes, 3 to 5 minutes, and 10 to 15 minutes, respectively;

[0041] (4) The photovoltaic bracket 5 after being immersed in the liquid is placed in a drying oven 41 for drying, the temperature in the oven is controlled at 60 to 80° C., and the drying time is controlled at 5 to 10 minutes;

[0042] (5) The dried photovoltaic bracket 5 is removed from the bracket 31, thus completing the stabilization treatment of the rust layer on the surface of the weathering steel photovoltaic bracket.

[0043] The processing device and method of the present invention will be described in detail below in conjunction with Examples 1-5.

[0044] Embodiment 1:

[0045] Prepare alkaline washing liquid and stabilizing liquid according to mass percentage, weigh the mass percentage content of each component of the alkaline washing liquid: 10% sodium hydroxide, 5% sodium carbonate, 2% sodium phosphate, 5% sodium metasilicate, 1% alkyl polyoxyethylene ether phosphate ester salt, 1% polyether defoamer, add deionized water to dissolve, stir evenly, and dissolve the agent completely. Weigh the mass percentage content of each component of the stabilizing liquid: 3% iron sulfate, 5% chromium sulfate, 3% sulfuric acid, add deionized water to dissolve, stir evenly, and dissolve the agent completely. Inject the alkaline washing liquid, deionized water, and stabilizing liquid into the first solution tank 11, the second solution tank 12, and the third solution tank 13 in the device respectively. Heat the three tanks through the heating tube 2, and control the temperatures of the first solution tank 11, the second solution tank 12, and the third solution tank 13 to be 50°C, 20°C, and 30°C, respectively. Place 10 photovoltaic brackets 5 on the bracket 31, control the overhead crane to pull the bracket 31 into the first solution tank 11, the second solution tank 12, and the third solution tank 13 in turn, and control the immersion time of the photovoltaic bracket 5 in the first solution tank 11, the second solution tank 12, and the third solution tank 13 to be 5 minutes, 3 minutes, and 10 minutes respectively. Put the photovoltaic bracket 5 after immersion into the drying oven 41 for drying, the temperature in the oven is controlled at 60°C, and the drying time is controlled at 5 minutes. Remove the dried photovoltaic bracket 5 from the bracket 31, and the stabilization treatment of the rust layer on the surface of the weathering steel photovoltaic bracket 5 is completed. A uniform brown rust layer is formed on the surface of the treated weathering steel photovoltaic bracket, the thickness of the rust layer is 50μm, the color difference value ΔE of the rust layer is 9.9, and the resistance value of the rust layer is 1010Ω.cm 2 .

[0046] Embodiment 2:

[0047] Prepare alkaline washing liquid and stabilizing liquid according to mass percentage, weigh the mass percentage content of each component of the alkaline washing liquid: 20% sodium hydroxide, 10% sodium carbonate, 5% sodium phosphate, 10% sodium metasilicate, 5% alkyl polyoxyethylene ether phosphate salt, 3% polyether defoamer, add deionized water to dissolve, stir evenly, and completely dissolve the agent. Weigh the mass percentage content of each component of the stabilizing liquid: 9% iron sulfate, 10% chromium sulfate, 8% sulfuric acid, add deionized water to dissolve, stir evenly, and completely dissolve the agent. Inject the alkaline washing liquid, deionized water, and stabilizing liquid into the first solution tank 11, the second solution tank 12, and the third solution tank 13 in the device respectively. Heat the three tanks through the heating tube 2, and control the temperatures of the first solution tank 11, the second solution tank 12, and the third solution tank 13 to be 70°C, 40°C, and 50°C, respectively. Place 20 photovoltaic brackets 5 on the bracket 31, control the overhead crane to pull the bracket 31 into the first solution tank 11, the second solution tank 12, and the third solution tank 13 in turn, and control the immersion time of the photovoltaic bracket 5 in the first solution tank 11, the second solution tank 12, and the third solution tank 13 to be 10 minutes, 5 minutes, and 15 minutes respectively. Put the photovoltaic bracket 5 after immersion into the drying oven 41 for drying, the temperature in the oven is controlled at 80°C, and the drying time is controlled at 10 minutes. Remove the dried photovoltaic bracket 5 from the bracket 31, and the stabilization treatment of the rust layer on the surface of the weathering steel photovoltaic bracket 5 is completed. A uniform brown rust layer is formed on the surface of the treated weathering steel photovoltaic bracket, the thickness of the rust layer is 60μm, the color difference value ΔE of the rust layer is 9.5, and the resistance value of the rust layer is 1100Ω.cm 2 .

[0048] Embodiment three:

[0049] Prepare alkaline washing liquid and stabilizing liquid according to mass percentage, weigh the mass percentage content of each component of the alkaline washing liquid: 15% sodium hydroxide, 7% sodium carbonate, 3% sodium phosphate, 7% sodium metasilicate, 4% alkyl polyoxyethylene ether phosphate salt, 2% polyether defoamer, add deionized water to dissolve, stir evenly, and dissolve the agent completely. Weigh the mass percentage content of each component of the stabilizing liquid: 6% iron sulfate, 6% chromium sulfate, 5% sulfuric acid, add deionized water to dissolve, stir evenly, and dissolve the agent completely. Inject the alkaline washing liquid, deionized water, and stabilizing liquid into the first solution tank 11, the second solution tank 12, and the third solution tank 13 in the device respectively. Heat the three tanks through the heating tube 2, and control the temperatures of the first solution tank 11, the second solution tank 12, and the third solution tank 13 to be 60°C, 30°C, and 40°C, respectively. Place 15 photovoltaic brackets 5 on the bracket 31, control the overhead crane to pull the bracket 31 to immerse in the first solution tank 11, the second solution tank 12, and the third solution tank 13 in turn, and control the immersion time of the photovoltaic bracket 5 in the first solution tank 11, the second solution tank 12, and the third solution tank 13 to be 8 minutes, 4 minutes, and 12 minutes respectively. Put the photovoltaic bracket 5 after immersion into the drying oven 41 for drying, the temperature in the oven is controlled at 70°C, and the drying time is controlled at 8 minutes. Remove the dried photovoltaic bracket 5 from the bracket 31, and the stabilization treatment of the rust layer on the surface of the weathering steel photovoltaic bracket 5 is completed. A uniform brown rust layer is formed on the surface of the treated weathering steel photovoltaic bracket, the thickness of the rust layer is 55μm, the color difference value ΔE of the rust layer is 9.6, and the resistance value of the rust layer is 1050Ω.cm 2 .

[0050] Embodiment 4:

[0051] Prepare alkaline washing liquid and stabilizing liquid according to mass percentage, weigh the mass percentage content of each component of the alkaline washing liquid: 15% sodium hydroxide, 9% sodium carbonate, 3% sodium phosphate, 9% sodium metasilicate, 2% alkyl polyoxyethylene ether phosphate salt, 1.5% polyether defoamer, add deionized water to dissolve, stir evenly, and completely dissolve the agent. Weigh the mass percentage content of each component of the stabilizing liquid: 4% iron sulfate, 6% chromium sulfate, 4% sulfuric acid, add deionized water to dissolve, stir evenly, and completely dissolve the agent. Inject the alkaline washing liquid, deionized water, and stabilizing liquid into the first solution tank 11, the second solution tank 12, and the third solution tank 13 in the device respectively. Heat the three tanks through the heating tube 2, and control the temperatures of the first solution tank 11, the second solution tank 12, and the third solution tank 13 to be 55°C, 25°C, and 5°C, respectively. Place 12 photovoltaic brackets 5 on the bracket 31, control the overhead crane to pull the bracket 31 to immerse in the first solution tank 11, the second solution tank 12, and the third solution tank 13 in turn, and control the immersion time of the photovoltaic bracket 5 in the first solution tank 11, the second solution tank 12, and the third solution tank 13 to be 5 minutes, 4 minutes, and 12 minutes respectively. Put the photovoltaic bracket 5 after immersion into the drying oven 41 for drying, the temperature in the oven is controlled at 65°C, and the drying time is controlled at 6 minutes. Remove the dried photovoltaic bracket 5 from the bracket 31, and the stabilization treatment of the rust layer on the surface of the weathering steel photovoltaic bracket 5 is completed. A uniform brown rust layer is formed on the surface of the treated weathering steel photovoltaic bracket, the thickness of the rust layer is 55μm, the color difference value ΔE of the rust layer is 9.8, and the resistance value of the rust layer is 1012Ω.cm 2 .

[0052] Embodiment five:

[0053] Prepare alkaline washing liquid and stabilizing liquid according to mass percentage, weigh the mass percentage content of each component of the alkaline washing liquid: sodium hydroxide 18%, sodium carbonate 6%, sodium phosphate 4%, sodium metasilicate 9%, alkyl polyoxyethylene ether phosphate ester salt 4%, polyether defoamer 2.5%, add deionized water to dissolve, stir evenly, and dissolve the agent completely. Weigh the mass percentage content of each component of the stabilizing liquid: ferrous sulfate 8%, chromium sulfate 7%, sulfuric acid 7%, add deionized water to dissolve, stir evenly, and dissolve the agent completely. Inject the alkaline washing liquid, deionized water, and stabilizing liquid into the first solution tank 11, the second solution tank 12, and the third solution tank 13 in the device respectively. Heat the three tanks through the heating tube 2, and control the temperatures of the first solution tank 11, the second solution tank 12, and the third solution tank 13 to be 65°C, 35°C, and 45°C, respectively. Place 18 photovoltaic brackets 5 on the bracket 31, control the overhead crane to pull the bracket 31 to immerse in the first solution tank 11, the second solution tank 12, and the third solution tank 13 in turn, and control the immersion time of the photovoltaic bracket 5 in the first solution tank 11, the second solution tank 12, and the third solution tank 13 to be 9 minutes, 4 minutes, and 14 minutes respectively. Put the photovoltaic bracket 5 after immersion into the drying oven 41 for drying, the temperature in the oven is controlled at 75°C, and the drying time is controlled at 8 minutes. Remove the dried photovoltaic bracket 5 from the bracket 31, and the stabilization treatment of the rust layer on the surface of the weathering steel photovoltaic bracket 5 is completed. A uniform brown rust layer is formed on the surface of the treated weathering steel photovoltaic bracket, the thickness of the rust layer is 57μm, the color difference value ΔE of the rust layer is 9.2, and the resistance value of the rust layer is 1020Ω.cm 2 .

[0054] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A method for stabilizing the rust layer on the surface of a weathering steel photovoltaic support, characterized in that: The invention comprises a treatment device for stabilizing the rust layer on the surface of a weathering steel photovoltaic support, the treatment device comprising a solution tank (1), a traction component (3) and a drying component (4), the solution tank (1) comprising a first solution tank (11) storing an alkaline washing solution, a second solution tank (12) storing deionized water and a third solution tank (13) storing a stabilizing solution, the first solution tank (11), the second solution tank (12) and the third solution tank (13) are all provided with a heating pipe (2), and the traction component (3) can drive the photovoltaic support (5) to enter and exit the first solution tank (11), the second solution tank (12), the third solution tank (13) and the drying component (4); The processing method comprises: Alkaline washing solution and stabilizing solution are prepared in a set ratio, and the alkaline washing solution, deionized water and stabilizing solution are added to a first solution tank (11), a second solution tank (12) and a third solution tank (13) respectively; The three tanks are heated by a heating tube (2), and the temperatures of the first solution tank (11), the second solution tank (12), and the third solution tank (13) are controlled to be 50-70° C., 20-40° C., and 30-50° C., respectively; Placing the photovoltaic support (5) on the bracket (31), controlling the overhead crane to pull the bracket (31) into the first solution tank (11), the second solution tank (12), and the third solution tank (13) in sequence, and controlling the immersion time of the photovoltaic support (5) in the first solution tank (11), the second solution tank (12), and the third solution tank (13) to be 5 to 10 minutes, 3 to 5 minutes, and 10 to 15 minutes, respectively; The photovoltaic support (5) after being immersed in the liquid is placed in a drying oven (41) for drying, the temperature in the oven is controlled at 60 to 80° C., and the drying time is controlled at 5 to 10 minutes; The dried photovoltaic bracket (5) is removed from the bracket (31), thus completing the stabilization treatment of the rust layer on the surface of the weathering steel photovoltaic bracket (5); The chemical components of the alkaline washing solution include, by mass percentage, 10-20% sodium hydroxide, 5-10% sodium carbonate, 2-5% sodium phosphate, 5-10% sodium metasilicate, 1-5% alkyl polyoxyethylene ether phosphate salt, 1-3% polyether defoamer, and the balance is deionized water; The chemical components of the stabilizing solution include, by mass percentage, 3-9% iron sulfate, 5-10% chromium sulfate, 3-8% sulfuric acid, and the balance is deionized water.

2. The method for stabilizing the rust layer on the surface of a weathering steel photovoltaic support according to claim 1, characterized in that: The chemical components of the alkaline washing solution include, by mass percentage, 18% sodium hydroxide, 6% sodium carbonate, 4% sodium phosphate, 9% sodium metasilicate, 4% alkyl polyoxyethylene ether phosphate salt, 2.5% polyether defoamer, and the balance is deionized water.

3. The method for stabilizing the rust layer on the surface of a weathering steel photovoltaic support according to claim 1, characterized in that: The chemical composition of the stabilizing solution includes, by mass percentage, 8% iron sulfate, 7% chromium sulfate, 7% sulfuric acid, and the balance is deionized water.

4. The method for stabilizing the rust layer on the surface of a weathering steel photovoltaic support according to claim 1, characterized in that: The traction assembly (3) comprises an overhead crane and a hanging frame (31), wherein the overhead crane is used to provide traction force, and the hanging frame (31) is connected to the overhead crane, and the hanging frame (31) is used to hang the photovoltaic support (5).

5. The method for stabilizing the rust layer on the surface of a weathering steel photovoltaic support according to claim 1, characterized in that: The drying assembly (4) comprises a drying box (41) and a heater (42); an opening for the photovoltaic bracket (5) to enter and exit is provided at the top of the drying box (41); the heater (42) is arranged adjacent to the drying box (41); and an air outlet of the heater (42) is aligned with an air inlet on a side wall of the drying box (41).

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