Curtain wall aluminum plate surface anti-corrosion protective coating structure

Abstract

The utility model belongs to the technical field of curtain wall protection, and discloses a curtain wall aluminum plate surface anti-corrosion protective coating structure which comprises a primer layer, a coating layer and a coating layer, the middle anti-corrosion layer is arranged on the side, away from the surface of the aluminum plate, of the primer layer and used for corrosion prevention; the finishing coat layer is arranged on one side, far away from the primer layer, of the middle anti-corrosion layer and is used for decoration; wherein the middle anti-corrosion layer comprises at least one sub-coating; and the primer layer is used for enhancing the adhesive force among the middle anti-corrosion layer, the finish paint layer and the aluminum plate. Through the arrangement of the primer layer, the middle anti-corrosion layer and the finish paint layer, meanwhile, the primer layer is attached to the surface of the aluminum plate, the middle anti-corrosion layer is arranged on the side, away from the surface of the aluminum plate, of the primer layer, the finish paint layer is arranged on the side, away from the primer layer, of the middle anti-corrosion layer, and the three-layer structure of the primer layer, the middle anti-corrosion layer and the finish paint layer has a synergistic effect to form a multi-layer protective barrier; external corrosion factors are effectively isolated, and the service life of the curtain wall aluminum plate is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of curtain wall protection, and particularly relates to an anti-corrosion protection coating structure on the surface of curtain wall aluminum plates. Background Art

[0002] As an important part of the building facade, curtain wall aluminum plates are exposed to the natural environment for a long time and are easily eroded by various factors such as rainwater, ultraviolet rays, and air pollutants. Therefore, applying an anti-corrosion coating on its surface can effectively extend the service life of the aluminum plate and maintain its good appearance and performance.

[0003] During the use of existing curtain wall aluminum plates, traditional single-layer or double-layer coating structures are difficult to meet the high requirements for anti-corrosion and other needs. Especially in harsh natural environments, the coating is prone to peeling and damage, which in turn affects the service life of the aluminum plate and the aesthetics of the coating. Summary of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide an anti-corrosion protection coating structure on the surface of curtain wall aluminum plates to solve the problems in the above background art.

[0005] To solve the above technical problems, the utility model provides an anti-corrosion protection coating structure on the surface of curtain wall aluminum plates, including:

[0006] A primer layer for adhering to the surface of the aluminum plate;

[0007] An intermediate anti-corrosion layer disposed on the side of the primer layer away from the surface of the aluminum plate for anti-corrosion;

[0008] And a topcoat layer disposed on the side of the intermediate anti-corrosion layer away from the primer layer for decoration;

[0009] Wherein, the intermediate anti-corrosion layer includes at least one sub-layer; the primer layer is used to enhance the adhesion between the intermediate anti-corrosion layer, the topcoat layer and the aluminum plate.

[0010] Through such a design, the three-layer structures of the primer layer, the intermediate anti-corrosion layer and the topcoat layer cooperate to form a multi-layer protection barrier, effectively isolating external corrosion factors and extending the service life of the curtain wall aluminum plate. In addition, the high weather resistance design of the topcoat layer enables the coating to still maintain good appearance and performance in harsh natural environments.

[0011] Preferably, the projections of the primer layer, the intermediate anti-corrosion layer and the topcoat layer on the surface of the aluminum plate are all coincidentally arranged.

[0012] Through such a design, the intermediate anti-corrosion layer can completely cover the primer layer, and the topcoat layer can completely cover the intermediate anti-corrosion layer. This overlapping arrangement ensures the continuity and integrity of the coating, thereby improving the overall performance and protection effect of the coating.

[0013] Preferably, the intermediate anti-corrosion layer includes a single sub-layer.

[0014] Through such a design, the construction is simpler and faster. The construction personnel only need to focus on the construction quality and performance of a single sub-layer, without having to consider the mutual influence and cooperation issues between sub-layers too much. This helps to shorten the construction period and reduce the construction cost.

[0015] Preferably, the intermediate anti-corrosion layer includes at least two sub-layers. The sub-layers are distributed in parallel along the direction away from the aluminum plate surface of the primer layer, and the projections of the sub-layers on the aluminum plate surface coincide with the projection of the primer layer on the aluminum plate surface.

[0016] Through such a design, the overall performance of the coating can be further enhanced. Each sub-layer can be optimized for different requirements, such as increasing leveling property, improving anti-corrosion performance, etc. Such a combination can form a more complex and effective protection system to meet higher requirements for the coating.

[0017] Preferably, the thickness of the intermediate anti-corrosion layer is greater than that of the topcoat layer; the thickness of the topcoat layer is greater than that of the primer layer.

[0018] Through such a design, the cost can be reduced while ensuring the realization of anti-corrosion and other effects.

[0019] Preferably, the intermediate anti-corrosion layer uses at least two of epoxy resin, polyester resin, and amino resin.

[0020] Through such a design, different materials of sub-layers can be selected and combined according to the overall design requirements of the coating system to achieve the best performance effect.

[0021] Preferably, the intermediate anti-corrosion layer includes three sub-layers, and each sub-layer uses epoxy resin, polyester resin, and amino resin respectively;

[0022] The sub-layer using epoxy resin is attached to the primer layer. The sub-layer using polyester resin is placed on the side away from the primer layer of the sub-layer using epoxy resin. The sub-layer using amino resin is placed on the side away from the sub-layer using epoxy resin of the sub-layer using polyester resin.

[0023] Through such a design, an economical and efficient intermediate coating system can be constructed to provide comprehensive protection for the substrate.

[0024] Preferably, at least one sub - coating is set as one of an acrylic coating, a fluorocarbon coating, and an electrostatic powder spray coating.

[0025] Preferably, a protective film is provided on the side of the topcoat layer away from the intermediate anti - corrosion layer.

[0026] Through such a design, the protective film can protect the curtain wall aluminum plate during the transportation of the curtain wall aluminum plate and the like.

[0027] The beneficial effects of the present utility model: Through the settings of the primer layer, the intermediate anti - corrosion layer, and the topcoat layer, at the same time, the primer layer is attached to the surface of the aluminum plate, the intermediate anti - corrosion layer is placed on the side of the primer layer away from the surface of the aluminum plate, and the topcoat layer is placed on the side of the intermediate anti - corrosion layer away from the primer layer. The three - layer structure of the primer layer, the intermediate anti - corrosion layer, and the topcoat layer acts synergistically to form a multi - layer protection barrier, effectively isolating external corrosion factors and extending the service life of the curtain wall aluminum plate. In addition, the high weather resistance design of the topcoat layer enables the coating to maintain good appearance and performance even in harsh natural environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 is the overall structural schematic diagram of the anti - corrosion protection coating structure on the surface of the curtain wall aluminum plate in the embodiment of the present utility model;

[0030] Figure 2 is Figure 1 the structural schematic diagram after omitting the protective film;

[0031] Figure 3 is Figure 2 the structural schematic diagram from another perspective;

[0032] Figure 4 is the structural schematic diagram of the primer layer and the topcoat layer in the embodiment of the present utility model;

[0033] Figure 5 is the structural schematic diagram of the intermediate anti - corrosion layer with multiple sub - coatings in the embodiment of the present utility model.

[0034] The reference numerals are as follows:

[0035] 1. Primer layer;

[0036] 2. Intermediate anti - corrosion layer; 21. Sub - coating;

[0037] 3. Topcoat layer;

[0038] 4. Protective film.

[0039] In the drawings, like parts are designated by like reference numerals. The drawings are not drawn to scale. Detailed implementation manners

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0041] Embodiment 1

[0042] As Figures 1 to 5 shown, the present utility model provides an anti-corrosion protection coating structure for the surface of curtain wall aluminum plates, including:

[0043] A primer layer 1 for adhering to the surface of the aluminum plate;

[0044] An intermediate anti-corrosion layer 2 disposed on the side of the primer layer 1 away from the surface of the aluminum plate for anti-corrosion;

[0045] And a topcoat layer 3 disposed on the side of the intermediate anti-corrosion layer 2 away from the primer layer 1 for decoration;

[0046] Wherein, the intermediate anti-corrosion layer 2 includes at least one sub-layer 21; the primer layer 1 is used to enhance the adhesion between the intermediate anti-corrosion layer 2, the topcoat layer 3 and the aluminum plate.

[0047] Optionally, the primer layer 1 is set as an epoxy resin primer or a polyurethane primer. The primer layer 1 uses a primer material with high adhesion and corrosion resistance, and is directly coated on the surface of the curtain wall aluminum plate to form a dense protective film, enhance the bonding force between the coating and the aluminum plate substrate, and provide a good adhesion basis for the subsequent coatings.

[0048] The main function of the primer layer 1 is to enhance the adhesion between the subsequent coatings (the intermediate anti-corrosion layer 2 and the topcoat layer 3) and the aluminum plate substrate; the surface of the aluminum plate may be contaminated with grease, oxides or other impurities during processing, transportation or storage, which will affect the bonding strength between the coating and the substrate; through its special chemical composition and physical properties, the primer can penetrate into the tiny pores on the surface of the aluminum plate to form mechanical locking and chemical bonding, thus significantly improving the adhesion of the coating. In addition, the primer layer 1 provides a clean, uniform and easily wettable base for the subsequent coatings. It fills the tiny defects and unevenness on the surface of the aluminum plate, enabling the subsequent coatings to spread more smoothly and evenly on the surface of the aluminum plate, avoiding problems such as uneven coating thickness or blistering caused by the uneven base. The primer layer 1 can initially provide anti-corrosion protection.

[0049] Optionally, the intermediate anti-corrosion layer 2 is a fluorocarbon coating layer or a polyurethane coating layer. As the core anti-corrosion layer, the intermediate anti-corrosion layer 2 uses special coatings with excellent weather resistance, chemical corrosion resistance and good barrier properties, such as fluorocarbon coatings or polyurethanes, to further enhance the anti-corrosion ability of the coating, while increasing the overall thickness and hardness of the coating to resist external mechanical damage.

[0050] Optionally, the topcoat layer 3 is set as a super weather-resistant polyester paint or an acrylic paint. As the outermost layer, the topcoat layer 3 selects topcoat materials with high weather resistance, high gloss and good self-cleaning properties, giving the coating an aesthetic decorative effect, while resisting the effects of ultraviolet radiation, rain erosion and air pollutants, and protecting the intermediate anti-corrosion layer 2 from being damaged.

[0051] Here is also a reference for the process of treating curtain wall aluminum plates as follows: Pretreatment, first clean and decontaminate the surface of the aluminum plate to remove impurities such as grease and oxides; Primer coating, use special spraying equipment or hand tools to evenly coat the primer layer 1 according to the required thickness and coverage area; Intermediate anti-corrosion layer 2 coating, after the primer layer 1 is dry, coat the intermediate anti-corrosion layer 2 using the same method, paying attention to controlling the coating thickness and uniformity; Topcoat layer 3 coating, after the intermediate anti-corrosion layer 2 is completely cured, coat the topcoat layer 3 to ensure the aesthetics and weather resistance of the overall coating; After each process is completed, conduct inspections on quality indicators such as coating thickness, adhesion, and gloss to ensure that the coating quality meets the design requirements.

[0052] The anti-corrosion coating on the surface of the aluminum plate is composed of a primer layer 1, an intermediate anti-corrosion layer 2 and a topcoat layer 3. By setting the primer layer 1, the intermediate anti-corrosion layer 2 and the topcoat layer 3, at the same time, the primer layer 1 is attached to the surface of the aluminum plate, the intermediate anti-corrosion layer 2 is placed on the side of the primer layer 1 away from the surface of the aluminum plate, and the topcoat layer 3 is placed on the side of the intermediate anti-corrosion layer 2 away from the primer layer 1. The three-layer structure of the primer layer 1, the intermediate anti-corrosion layer 2 and the topcoat layer 3 acts synergistically to form a multi-layer protection barrier, effectively isolating external corrosion factors and prolonging the service life of the curtain wall aluminum plate. In addition, the high weather resistance design of the topcoat layer 3 enables the coating to maintain good appearance and performance in harsh natural environments.

[0053] The substrate generally refers to the aluminum plate in the present utility model.

[0054] Embodiment 2

[0055] In this embodiment, the projections of the primer layer 1, the intermediate anti-corrosion layer 2 and the topcoat layer 3 on the surface of the aluminum plate are all set to coincide.

[0056] Optionally, the primer layer 1 completely covers the surface of the aluminum plate.

[0057] By setting the projections of the primer layer 1, the intermediate anti-corrosion layer 2 and the topcoat layer 3 on the surface of the aluminum plate to coincide, complete coverage of the primer layer 1 by the intermediate anti-corrosion layer 2 and complete coverage of the intermediate anti-corrosion layer 2 by the topcoat layer 3 can be achieved; when the primer layer 1 completely covers the surface of the aluminum plate, this coincident setting ensures the continuity and integrity of the coating, thereby improving the overall performance and protection effect of the coating.

[0058] Embodiment 3

[0059] In this embodiment, the intermediate anti-corrosion layer 2 includes a single sub-layer 21.

[0060] As mentioned above, the intermediate anti-corrosion layer 2 includes at least one sub-layer 21. In this embodiment, the intermediate anti-corrosion layer 2 includes a single sub-layer 21.

[0061] Since the intermediate anti-corrosion layer 2 only includes a single sub-layer 21, the thickness of this single sub-layer 21 is the thickness of the intermediate anti-corrosion layer 2.

[0062] Compared with the setting when the intermediate anti-corrosion layer 2 includes multiple sub-layers 21, for the setting where the intermediate anti-corrosion layer 2 only includes a single sub-layer 21, the construction of the single sub-layer 21 is simpler and faster. The construction personnel only need to pay attention to the construction quality and performance of the single sub-layer 21, and do not need to consider the mutual influence and cooperation problems between the sub-layers 21 too much. This helps to shorten the construction period and reduce the construction cost.

[0063] Embodiment 4

[0064] In this embodiment, the intermediate anti-corrosion layer 2 includes at least two sub-layers 21. Each sub-layer 21 is distributed in parallel along the direction away from the aluminum plate surface of the primer layer 1, and the projections of each sub-layer 21 on the aluminum plate surface coincide with the projection of the primer layer 1 on the aluminum plate surface.

[0065] As mentioned above, the intermediate anti-corrosion layer 2 includes at least one sub-layer 21. In this embodiment, the intermediate anti-corrosion layer 2 includes at least two sub-layers 21.

[0066] Taking the case where the intermediate anti-corrosion layer 2 includes two sub-layers 21 as an example, the two sub-layers 21 are distributed in parallel along the direction away from the aluminum plate surface of the primer layer 1, and the projections of the two sub-layers 21 on the aluminum plate surface coincide with the projection of the primer layer 1 on the aluminum plate surface. During construction, one of the sub-layers 21 is coated first, and after it is cured, the other sub-layer 21 is coated.

[0067] Since the intermediate anti-corrosion layer 2 includes at least two sub-layers 21, the sum of the thicknesses of each sub-layer 21 is the thickness of the intermediate anti-corrosion layer 2.

[0068] The setting that the intermediate anti-corrosion layer 2 includes at least two sub-layers 21 has the following effects: By setting more than one sub-layer 21, the overall performance of the coating can be further enhanced. Each sub-layer 21 can be optimized for different requirements, such as increasing the leveling property and improving the anti-corrosion performance. Such a combination can form a more complex and effective protection system to meet higher requirements for the coating.

[0069] It should be further noted that when the thickness of the intermediate anti-corrosion layer 2 in Embodiment 3 is the same as that of the intermediate anti-corrosion layer 2 in this embodiment, since the intermediate anti-corrosion layer 2 in this embodiment includes at least two sub-layers 21 and belongs to a layered design, it generally can form a denser protection layer and more effectively isolate the aluminum plate from the erosion of the external environment. Each sub-layer 21 can block the penetration of moisture, oxygen, and other corrosive substances to a certain extent, and the superposition effect of multiple sub-layers 21 can further improve the anti-corrosion effect. In addition, although setting more than one sub-layer 21 generally requires more construction time, in the long run, its better anti-corrosion effect and longer service life generally will reduce the maintenance cost and replacement cost.

[0070] Embodiment 5

[0071] In this embodiment, the thickness of the intermediate anti-corrosion layer 2 is greater than the thickness of the topcoat layer 3; the thickness of the topcoat layer 3 is greater than the thickness of the primer layer 1.

[0072] A reference for the thicknesses of the intermediate anti-corrosion layer 2, the topcoat layer 3, and the primer layer 1 is given as follows: the thickness of the primer layer 1 is set between 20 and 30 microns; the thickness of the intermediate anti-corrosion layer 2 is set between 50 and 250 microns; the thickness of the topcoat layer 3 is set between 40 and 50 microns.

[0073] Optionally, the thickness of the primer layer 1 is set to 25 microns; the thickness of the intermediate anti-corrosion layer 2 is set to 80 microns; the thickness of the topcoat layer 3 is set to 45 microns.

[0074] It should be noted that, as the first layer of the coating system, the main function of the primer layer 1 is to enhance the adhesion between the coating and the aluminum plate substrate and initially protect the aluminum plate substrate from corrosion. Therefore, an overly thick primer layer 1 is not required to achieve the effect, and a thinner primer layer 1 also helps to reduce material consumption and cost; the intermediate anti-corrosion layer 2 is the part of the coating system that provides the main anti-corrosion protection, and it requires a sufficient thickness to form an effective barrier to isolate the aluminum plate substrate from the external environment; the topcoat layer 3 is the outermost layer of the coating system, and its main function is to provide an aesthetic decorative effect and resist the erosion of the external environment such as ultraviolet rays and moisture. Although the topcoat layer 3 also requires a certain thickness to ensure these properties, its thickness can be slightly smaller compared to the intermediate anti-corrosion layer 2.

[0075] By setting the thickness of the intermediate anti-corrosion layer 2 to be greater than that of the topcoat layer 3 and the thickness of the topcoat layer 3 to be greater than that of the primer layer 1, the cost can be reduced while ensuring the achievement of anti-corrosion and other effects.

[0076] In addition, each layer of the coating system needs to maintain a certain balance to ensure the stability and durability of the overall performance, and the gradient setting of the thicknesses of the primer layer 1, the intermediate anti-corrosion layer 2, and the topcoat layer 3 helps to achieve this balance. For example, a thinner primer layer 1 helps to reduce the stress concentration between the primer layer 1 and the aluminum plate substrate.

[0077] At the same time, during the construction process, the control of the coating thickness is an important link. An overly thick coating may lead to problems such as increased construction difficulty, extended drying time, and material waste. Therefore, on the premise of ensuring the performance of the coating system, reasonably controlling the thickness of each layer can reduce costs and improve construction efficiency.

[0078] It should be emphasized that the structures within the present utility model can be adjusted according to the actual situation. For example, the thicknesses of the intermediate anti-corrosion layer 2, the topcoat layer 3, and the primer layer 1 can be adjusted according to actual needs. For example, when the intermediate anti-corrosion layer 2 includes multiple sub-layers 21, the thicknesses of the respective sub-layers 21 may not be the same.

[0079] Example 6

[0080] In this embodiment, the intermediate anti-corrosion layer 2 adopts at least two of epoxy resin, polyester resin, and amino resin.

[0081] When the intermediate anti-corrosion layer 2 includes only a single sub-layer 21, generally only a single material is used for the intermediate anti-corrosion layer 2, such as epoxy resin.

[0082] When the intermediate anti-corrosion layer 2 includes at least two sub-layers 21, different materials of sub-layers 21 can be selected for combined use according to the overall design requirements of the coating system to achieve the best performance effect. For example, at least two of epoxy resin, polyester resin, and amino resin are used for the intermediate anti-corrosion layer 2.

[0083] Example 7

[0084] In this example, the intermediate anti-corrosion layer 2 includes three sub-layers 21, and each sub-layer 21 uses epoxy resin, polyester resin, and amino resin respectively;

[0085] The sub-layer 21 using epoxy resin is adhered to the primer layer 1. The sub-layer 21 using polyester resin is placed on the side of the sub-layer 21 using epoxy resin away from the primer layer 1. The sub-layer 21 using amino resin is placed on the side of the sub-layer 21 using polyester resin away from the sub-layer 21 using epoxy resin.

[0086] The thickness of the intermediate anti-corrosion layer 2 is greater than the thickness of the topcoat layer 3; the thickness of the topcoat layer 3 is greater than the thickness of the primer layer 1.

[0087] The sub-layer 21 using epoxy resin is adhered to the primer layer 1. This sub-layer 21 can be used as a primer enhancement layer to effectively enhance the adhesion between the coating and the substrate and form an anti-corrosion barrier. The sub-layer 21 using polyester resin is placed on the side of the sub-layer 21 using epoxy resin away from the primer layer 1. This sub-layer 21 is mainly used to fill the micro-defects on the substrate surface and at the same time provide additional barrier performance to prevent the penetration of harmful substances such as moisture and oxygen. The sub-layer 21 using amino resin is placed on the side of the sub-layer 21 using polyester resin away from the sub-layer 21 using epoxy resin. This sub-layer 21 is used to improve the overall hardness and gloss of the coating.

[0088] Example 8

[0089] In this example, at least one sub-layer 21 is set as one of an acrylic coating, a fluorocarbon coating, and an electrostatic powder spray coating.

[0090] Example 9

[0091] In this example, a protective film 4 is provided on the side of the topcoat layer 3 away from the intermediate anti-corrosion layer 2.

[0092] The protective film 4 can be made of materials such as high-pressure polyethylene.

[0093] The protective film 4 and the topcoat layer 3 are separably arranged. The protective film 4 is used to protect the curtain wall aluminum plate during the transportation of the curtain wall aluminum plate and the like. After the curtain wall aluminum plate is installed, the protective film 4 needs to be torn off.

[0094] The protective film 4 may include a bubble film, so as to better protect the edge turning parts of the curtain wall aluminum plate.

[0095] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0096] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. The anti-corrosion protection coating structure on the surface of the curtain wall aluminum plate is characterized in that Including: A primer layer (1) for adhering to the surface of the aluminum plate; An intermediate anti-corrosion layer (2) disposed on the side of the primer layer (1) away from the surface of the aluminum plate for anti-corrosion; And a topcoat layer (3) disposed on the side of the intermediate anti-corrosion layer (2) away from the primer layer (1) for decoration; Wherein, the intermediate anti-corrosion layer (2) includes at least one sub-layer (21); the primer layer (1) is used to enhance the adhesion between the intermediate anti-corrosion layer (2), the topcoat layer (3) and the aluminum plate.

2. The anti-corrosion protection coating structure on the surface of the curtain wall aluminum plate according to claim 1, wherein The projection of the primer layer (1) on the surface of the aluminum plate, the projection of the intermediate anti-corrosion layer (2) on the surface of the aluminum plate, and the projection of the topcoat layer (3) on the surface of the aluminum plate are all coincidentally arranged.

3. The anti-corrosion protection coating structure on the surface of the curtain wall aluminum plate according to claim 2, wherein The intermediate anti-corrosion layer (2) includes a single sub-layer (21).

4. The anti-corrosion protection coating structure on the surface of the curtain wall aluminum plate according to claim 2, characterized in that, The intermediate anti-corrosion layer (2) includes at least two sub-layers (21), and each sub-layer (21) is distributed in parallel along the direction of the primer layer (1) away from the surface of the aluminum plate, and the projection of each sub-layer (21) on the surface of the aluminum plate coincides with the projection of the primer layer (1) on the surface of the aluminum plate.

5. The anti-corrosion protection coating structure on the surface of the curtain wall aluminum plate according to claim 3 or 4, characterized in that, The thickness of the intermediate anti-corrosion layer (2) is greater than the thickness of the topcoat layer (3); the thickness of the topcoat layer (3) is greater than the thickness of the primer layer (1).

6. The anti-corrosion protection coating structure on the surface of the curtain wall aluminum plate according to claim 4, wherein, The intermediate anti-corrosion layer (2) is made of at least two of epoxy resin, polyester resin, and amino resin.

7. The anti-corrosion protection coating structure on the surface of the curtain wall aluminum plate according to claim 6, characterized in that, The intermediate anti-corrosion layer (2) includes three sub-layers (21), and each sub-layer (21) is made of epoxy resin, polyester resin, and amino resin respectively; The sub-layer (21) made of epoxy resin is attached to the primer layer (1), the sub-layer (21) made of polyester resin is disposed on the side of the sub-layer (21) made of epoxy resin away from the primer layer (1), and the sub-layer (21) made of amino resin is disposed on the side of the sub-layer (21) made of polyester resin away from the sub-layer (21) made of epoxy resin.

8. The anti-corrosion protection coating structure on the surface of the curtain wall aluminum plate according to claim 4, characterized in that, At least one sub-layer (21) is set as one of an acrylic coating, a fluorocarbon coating, and an electrostatic powder coating layer.

9. The anti-corrosion protection coating structure on the surface of the curtain wall aluminum plate according to claim 1, characterized in that, A protective film (4) is provided on the side of the topcoat layer (3) away from the intermediate anti-corrosion layer (2).

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