Gate anti-fouling corrosion-resistant biomimetic nano-coating structure

Abstract

The utility model relates to gate coating technical field, and disclose a kind of gate stain-resistant anticorrosive bionic nano coating structure, comprising: gate substrate, its outer surface is equipped with coating part, coating part is from inside to outside in turn base layer, primer, intermediate coating, functional layer and nano anticorrosive coating, base layer is treated by sand throwing, can increase gate substrate surface roughness, improve the bonding force with subsequent primer, ensure that coating adheres firmly;Primer uses polyurethane cloud iron labyrinth rust-proof technology, utilize labyrinth structure to prolong the penetration path of corrosive medium, enhance rust protection;Intermediate coating is inorganic silica-alumina ceramic coating, with excellent chemical stability and wear resistance, can further block outside corrosive medium invasion, improve overall protection performance;Functional layer and nano anticorrosive coating use nano bionic lotus leaf hydrophobic layer, with water-repellent effect, reduce moisture adhesion by virtue of superhydrophobic characteristics, reduce stain adhesion ability.

Description

Technical Field

[0001] This utility model relates to the field of gate coating technology, specifically to a biomimetic nano-coating structure for gates that is resistant to pollution and corrosion. Background Technology

[0002] Gates are key structures in water conservancy projects used to control water flow. They are widely used in rivers, reservoirs, sluices, hydropower stations, irrigation canals, and ports. Through opening and closing operations, they regulate water flow to achieve functions such as flood control, irrigation, power generation, and navigation. Gate types are classified by material: steel gates, cast iron gates, reinforced concrete gates, and wooden gates; by structural form: flat gates, arc gates, miter gates, lift-and-relief gates, and triangular gates; and by operation method: manual gates, electric gates, hydraulic gates, and pneumatic gates. As a key structure in water conservancy projects that is in long-term contact with water, humid environments, and potentially corrosive media, the core purpose of coatings on the gate surface is to delay material degradation through physical or chemical protection.

[0003] Traditional single-component coatings achieve corrosion protection by consuming the coating material, making it difficult to simultaneously achieve corrosion resistance and antifouling performance. For example, while epoxy coatings offer some rust prevention, their insufficient hydrophobicity makes them prone to adsorbing suspended solids and microorganisms in water, forming biofilms and accelerating localized corrosion. Some multi-layer coatings, although employing a primer-topcoat structure, suffer from poor material compatibility between layers. For instance, the difference in thermal expansion coefficients between the primer and intermediate layers can cause stress concentration, leading to delamination and peeling under water flow impact. Furthermore, conventional antifouling coatings rely on releasing biocides (such as copper ions), whose effective components are depleted after long-term use, easily causing secondary pollution. Biomimetic superhydrophobic coatings, due to insufficient nanostructure stability, rapidly lose their self-cleaning function after wear or chemical erosion. More importantly, existing technologies lack a systematic design to block the penetration path of corrosive media. For example, traditional anti-rust primers do not form a labyrinthine barrier structure, making it difficult to delay the diffusion of corrosive ions such as chloride ions. While single ceramic coatings are heat-resistant, they are brittle and cannot meet the deformation requirements of gate opening and closing. To address this, a biomimetic nano-coating structure for gate antifouling and corrosion resistance is proposed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a biomimetic nano-coating structure for a gate that is resistant to fouling and corrosion. This structure solves the technical problem that while epoxy coatings have a certain degree of rust prevention, their hydrophobic properties are insufficient, and they easily adsorb suspended solids and microorganisms in the water to form biofilms, leading to accelerated local corrosion.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a biomimetic nano-coating structure for a gate that is resistant to fouling and corrosion, comprising:

[0006] The gate substrate and the coating portion disposed on the outer surface of the gate substrate, wherein the coating portion consists of a base layer, a primer layer, an intermediate layer, a functional layer and a nano-anti-corrosion coating from the inside out. The base layer is sandblasted, and the primer layer uses polyurethane resin as the film-forming base material, and micaceous iron oxide is arranged in parallel and oriented in a fish-scale layered manner in the coating. The polyurethane micaceous iron oxide labyrinth anti-rust technology is adopted. The polyurethane micaceous iron oxide labyrinth anti-rust technology uses polyurethane resin as the film-forming base material, combined with flaky micaceous iron oxide to form a multi-layered interlaced "labyrinth structure", which achieves efficient seepage prevention by extending the penetration path of corrosive media, and has the advantages of long-term anti-rust, strong weather resistance and wide applicability.

[0007] The intermediate coating is an inorganic silicon-aluminum ceramic coating, and the functional layer and the nano-anti-corrosion coating are both biomimetic lotus leaf hydrophobic layers.

[0008] A base layer is applied to the outer surface of the gate substrate. This treatment involves sandblasting to remove impurities and increase the surface roughness of the gate substrate. A primer layer is then applied to the outer surface of the gate substrate after the base layer has been applied. The primer layer uses polyurethane micaceous iron maze anti-rust technology. An intermediate layer is then applied to the outer surface of the primer layer. The intermediate layer is an inorganic silicon aluminum ceramic coating. A functional layer is then applied to the outer surface of the intermediate layer. The functional layer is a biomimetic lotus leaf hydrophobic layer. Finally, a nano-anti-corrosion coating is applied to the outer surface of the functional layer. The nano-anti-corrosion coating is also a biomimetic lotus leaf hydrophobic layer, forming a complete coating section.

[0009] Preferably, the base layer is sandblasted, forming a distributed rough texture on its surface. The sandblasting operation on the base layer creates a distributed rough texture on its surface.

[0010] Preferably, the base coating layer forms an interlocking closed cavity structure through a polyurethane micaceous iron maze anti-rust structure, and the base coating layer covers the surface of the substrate after treatment. The use of polyurethane micaceous iron maze anti-rust technology to form the base coating layer on the surface of the substrate after treatment creates an interlocking closed cavity structure, ensuring that the base coating layer completely covers the surface of the substrate after treatment.

[0011] Preferably, the inorganic silicon-aluminum ceramic coating of the intermediate coating forms a continuous mesh skeleton inside, and the mesh skeleton is tightly fitted with the surface of the base coating. This ensures that the inorganic silicon-aluminum ceramic coating of the intermediate coating forms a continuous mesh skeleton inside, and that the mesh skeleton is tightly fitted with the surface of the base coating.

[0012] Preferably, the surface of the biomimetic lotus leaf hydrophobic layer of the functional layer has irregularly distributed protruding structures, forming recessed areas between the protruding structures. The irregularly distributed protruding structures on the surface of the biomimetic lotus leaf hydrophobic layer of the functional layer naturally create recessed areas between them.

[0013] Preferably, the biomimetic lotus leaf hydrophobic layer of the nano-anticorrosion coating completely covers the outer surface of the functional layer, and the biomimetic lotus leaf hydrophobic layer of the nano-anticorrosion coating and the hydrophobic structure of the functional layer form a continuous hydrophobic system. Setting the biomimetic lotus leaf hydrophobic layer of the nano-anticorrosion coating to completely cover the outer surface of the functional layer allows the biomimetic lotus leaf hydrophobic layer of the nano-anticorrosion coating and the hydrophobic structure of the functional layer to cooperate with each other to form a continuous hydrophobic system.

[0014] Compared with the prior art, this utility model provides a biomimetic nano-coating structure for a gate that is resistant to dirt and corrosion, and has the following beneficial effects:

[0015] The sandblasting process increases the surface roughness of the gate substrate, improves the adhesion to the subsequent base coat, and ensures that the coating adheres firmly throughout.

[0016] The base coating uses polyurethane micaceous iron maze anti-rust technology, which can extend the penetration path of corrosive media by utilizing the maze structure to enhance the anti-rust protection of the gate substrate.

[0017] The intermediate coating is an inorganic silicon-aluminum ceramic coating, which has excellent chemical stability and wear resistance, and can further block the intrusion of external corrosive media and improve the overall protective performance of the coating.

[0018] The functional layer and nano-anti-corrosion coating achieve water repellency by utilizing the inorganic nano-coating structure and the superhydrophobic properties of the biomimetic lotus leaf. This reduces the adhesion of water to the coating surface and decreases the adhesion of stains, making it easier for stains to be carried away by water flow. This effectively reduces the accumulation of pollutants and avoids corrosion problems caused by long-term stain adhesion, ultimately achieving a gate structure with both good stain resistance and corrosion resistance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the composition of the coating part of this utility model.

[0021] In the figure: 1. Gate substrate; 2. Coating part; 3. Base layer; 4. Primer; 5. Intermediate coating; 6. Functional layer; 7. Nano-anti-corrosion coating. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] This utility model provides a technical solution: a biomimetic nano-coating structure for a gate that is resistant to dirt and corrosion, including: (See details) Figure 1 and Figure 2 The gate substrate 1 and the coating portion 2 disposed on the outer surface of the gate substrate 1, wherein the coating portion 2 consists of a base layer 3, a base coat 4, an intermediate coat 5, a functional layer 6 and a nano anti-corrosion coating 7 from the inside out. The base layer 3 is sandblasted, and the base coat 4 adopts polyurethane micaceous iron oxide labyrinth anti-rust technology, which uses polyurethane resin as the film-forming base material and micaceous iron oxide is arranged in parallel and oriented in a fish scale pattern in the coating. The polyurethane micaceous iron oxide labyrinth anti-rust technology uses polyurethane resin as the film-forming base material and combines it with flaky micaceous iron oxide to form a multi-layered interlaced "labyrinth structure". It achieves efficient seepage prevention by extending the penetration path of corrosive media and has the advantages of long-term anti-rust, strong weather resistance and wide applicability.

[0024] The outer surface of the gate substrate 1 is sandblasted with a base layer 3 to remove impurities and increase its surface roughness. A base layer 4 is applied to the outer surface of the gate substrate 1 after the base layer 3. The base layer 4 adopts polyurethane micaceous iron maze anti-rust technology. An intermediate layer 5 is applied to the outer surface of the base layer 4. The intermediate layer 5 is an inorganic silicon aluminum ceramic coating. A functional layer 6 is applied to the outer surface of the intermediate layer 5. The functional layer 6 is a biomimetic lotus leaf hydrophobic layer. A nano anti-corrosion coating 7 is applied to the outer surface of the functional layer 6. The nano anti-corrosion coating 7 is a biomimetic lotus leaf hydrophobic layer, forming a complete coating part 2.

[0025] The base layer 3 is sandblasted, which can effectively remove impurities from the surface of the gate substrate 1 and increase its surface roughness, providing a good adhesion base for the subsequent coating of the primer 4, ensuring that the primer 4 is firmly bonded to the gate substrate 1 and is not easy to fall off.

[0026] The base layer 3 is sandblasted, forming a distributed rough texture on its surface. Sandblasting the base layer 3 creates a distributed rough texture on its surface; this rough texture increases the contact area of ​​the base layer 3 surface, which is beneficial for the bonding between the subsequent coating and the base layer 3, improving the adhesion stability of the coating.

[0027] The primer layer 4 forms an interlocking closed cavity structure through a polyurethane micaceous iron oxide labyrinth anti-rust structure, and the primer layer 4 covers the surface treated by the base layer 3. The primer layer 4 is formed on the surface treated by the polyurethane micaceous iron oxide labyrinth anti-rust technology, creating an interlocking closed cavity structure that ensures complete coverage of the base layer 3 surface. This interlocking closed cavity structure effectively blocks the intrusion of external corrosive media such as moisture and oxygen. Combined with complete coverage of the base layer 3 surface, it significantly improves the overall rust prevention performance of the structure and extends the service life of the base layer.

[0028] The inorganic aluminosilicate ceramic coating of the intermediate coating 5 forms a continuous mesh skeleton, which is tightly fitted to the surface of the base coating 4. This continuous mesh skeleton enhances the structural strength of the intermediate coating 5, while the tight fit between the mesh skeleton and the base coating 4 improves the bonding force between the intermediate coating 5 and the base coating 4, resulting in a more stable overall coating system.

[0029] The surface of the biomimetic lotus leaf hydrophobic layer of functional layer 6 is covered with irregularly shaped protrusions, forming recessed areas between them. The irregular protrusions on the surface of functional layer 6 naturally create recessed areas between them. The combined effect of these irregular protrusions and the recessed areas enhances the hydrophobic properties of functional layer 6 using a biomimetic lotus leaf effect, making it difficult for water to adhere to its surface and facilitating water flow.

[0030] The nano-anti-corrosion coating 7, after curing, forms a dense nano-coating on the substrate surface, thus blocking the corrosion of the substrate by oxygen and moisture. Nano-anti-corrosion coating 7 uses nano-inorganic compounds as the main base material and is prepared through multiple reactions including an improved sol-gel reaction and hydrolysis curing. It possesses inherent thermal stability, is unaffected by sunlight and ultraviolet radiation, and exhibits excellent wear resistance, non-stick properties, hydrophobicity, oleophobicity, stain resistance, aging resistance, corrosion resistance, rust prevention, environmental friendliness, and fire resistance. Nano-anti-corrosion coating 7 has excellent flexibility, capable of being bent by 35%, exceeding the actual requirements for steel applications. The main chemical components of nano-anti-corrosion coating 7 are Si (silicon), O (oxygen), Al (aluminum), C (carbon), and H (hydrogen), which, through an improved sol-gel reaction and hydrolysis curing, form a stable, dense, and smooth nanofilm. This process is not a simple physical mixing of substances; it involves the formation of new compounds through chemical bonds. Multiple nano-scale oxides, through an improved sol-gel reaction, hydrolyze and cure at room temperature, forming a paint film similar to ceramics and glass. The film-forming principle is completely different from that of current resin-based organic coatings, such as Teflon, fluorocarbon paint, and polyethersulfone, so the performance is very different.

[0031] The nano-anti-corrosion coating 7 has a high surface tension (index as high as 130+σ). After the coating reaches a fully cured state, it has a shielding effect and a hydrophobic effect, making it difficult for 99% of dust, dirt, and colloids to adhere to or penetrate into the interior. It is easy to clean, does not produce mold or deterioration, and is resistant to acid and alkali corrosion, providing corrosion protection to the substrate for up to 15 years. The main function of the nano-anti-corrosion coating 7 is to reduce the accumulation of dirt on the gate surface, including problems such as shellfish adhesion, increased underwater resistance, and algae growth. This function, through the coating's low surface tension and hydrophobic and oleophobic properties, makes it difficult for dirt to adhere and is easily washed away by water flow, thereby reducing the need for manual cleaning, lowering maintenance costs, and maintaining the gate's efficient operation and clean appearance.

[0032] The nano-anti-corrosion coating 7 completely covers the outer surface of the functional layer 6, and the nano-anti-corrosion coating 7 and the hydrophobic structure of the functional layer 6 form a continuous hydrophobic system. Setting the nano-anti-corrosion coating 7 to completely cover the outer surface of the functional layer 6, so that the nano-anti-corrosion coating 7 and the hydrophobic structure of the functional layer 6 cooperate to form a continuous hydrophobic system, can further improve the overall hydrophobic effect, enhance the protection of the internal structure of the coating, and reduce the erosion of the coating by external liquids.

[0033] This solution: The rough texture formed by sandblasting can increase the contact area on the surface of the base layer 3, which is beneficial to the bonding between the subsequent coating and the base layer 3 and improves the stability of the coating adhesion.

[0034] A base coating 4 is applied to the outer surface of the gate substrate 1 after passing through the base layer 3. The base coating 4 adopts polyurethane micaceous iron maze anti-rust technology. The base coating 4 is formed on the surface treated by the base layer 3 using polyurethane micaceous iron maze anti-rust technology, so that the base coating 4 presents an interlocking closed cavity structure and ensures that the base coating 4 completely covers the surface treated by the base layer 3. The interlocking closed cavity structure can effectively block the intrusion of external corrosive media such as moisture and oxygen. Combined with the complete coverage of the surface treated by the base layer 3, it can significantly improve the rust prevention performance of the overall structure and extend the service life of the base layer.

[0035] An intermediate coating 5 is applied to the outer surface of the base coating 4. The intermediate coating 5 is an inorganic silicon-aluminum ceramic coating, which forms a continuous mesh skeleton inside the inorganic silicon-aluminum ceramic coating of the intermediate coating 5. The mesh skeleton is tightly embedded with the surface of the base coating 4. The continuous mesh skeleton can enhance the structural strength of the intermediate coating 5 itself, and the tight embedding of the mesh skeleton with the surface of the base coating 4 can improve the bonding force between the intermediate coating 5 and the base coating 4, making the overall structure of the coating system more stable.

[0036] A functional layer 6 is coated on the outer surface of the intermediate coating 5. The functional layer 6 is a biomimetic lotus leaf hydrophobic layer. Irregular protrusions are constructed on the surface of the biomimetic lotus leaf hydrophobic layer of the functional layer 6, so that the protrusions naturally form concave areas. The irregular protrusions and the concave areas between the protrusions work together to enhance the hydrophobic properties of the functional layer 6 by utilizing the biomimetic lotus leaf effect, making it difficult for water to adhere to its surface and facilitating water flow and sliding.

[0037] A nano-anti-corrosion coating 7 is applied to the outer surface of the functional layer 6. The nano-anti-corrosion coating 7 enhances the protection of the internal structure of the coating and reduces the erosion of the coating by external liquids.

[0038] The above structures 3-7 form the complete coating part 2.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A biomimetic nano-coating structure for a gate that is resistant to dirt and corrosion, characterized in that, include: The gate substrate (1) and the coating portion (2) disposed on the outer surface of the gate substrate (1) are, from the inside to the outside, a base layer (3), a bottom coating layer (4), an intermediate coating layer (5), a functional layer (6) and a nano anti-corrosion coating layer (7). The base layer (3) is sandblasted. The bottom coating layer (4) uses polyurethane resin as the film-forming base material and has mica iron oxide arranged in parallel in a fish-scale layered pattern. The intermediate coating layer (5) is an inorganic silicon aluminum ceramic coating. The functional layer (6) and the nano anti-corrosion coating layer (7) are both biomimetic lotus leaf hydrophobic layers.

2. The gate's anti-fouling and anti-corrosion biomimetic nano-coating structure according to claim 1, characterized in that: The base layer (3) is sandblasted, and a distributed rough texture is formed on the surface of the base layer (3).

3. The gate's anti-fouling and corrosion-resistant biomimetic nano-coating structure according to claim 1, characterized in that: The base coating (4) forms an interlocking closed cavity structure through a polyurethane micaceous iron maze anti-rust structure, and the base coating (4) covers the surface treated by the base layer (3).

4. The gate's anti-fouling and anti-corrosion biomimetic nano-coating structure according to claim 1, characterized in that: The inorganic silicon-aluminum ceramic coating of the intermediate coating (5) forms a continuous mesh skeleton inside, and the mesh skeleton is tightly fitted with the surface of the base coating (4).

5. The gate's anti-fouling and anti-corrosion biomimetic nano-coating structure according to claim 1, characterized in that: The surface of the biomimetic lotus leaf hydrophobic layer of the functional layer (6) has irregular protrusions and recessed areas between the protrusions.

6. The gate's anti-fouling and anti-corrosion biomimetic nano-coating structure according to claim 1, characterized in that: The biomimetic lotus leaf hydrophobic layer of the nano-anticorrosion coating (7) completely covers the outer surface of the functional layer (6), and the biomimetic lotus leaf hydrophobic layer of the nano-anticorrosion coating (7) and the hydrophobic structure of the functional layer (6) form a continuous hydrophobic system.

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