Marine engineering steel structure with high corrosion resistance

Abstract

The utility model belongs to the field of ocean engineering technology, specifically is a kind of ocean engineering steel structure with strong anticorrosive ability, including steel structure body, the surface of steel structure body is provided with anticorrosive subassembly. Through the electric arc zinc spraying layer in anticorrosive metal spraying layer can be as anode and be corroded preferentially, to protect the steel structure body as cathode, second heavy-duty anticorrosive spraying layer usually uses epoxy resin to enhance the shielding effect of coating, at the same time, the effect of epoxy zinc-rich primer layer is to provide cathodic protection on one hand, on the other hand, epoxy resin component has excellent adhesion to lower coating and upper coating, wherein, the mica iron oxide intermediate coating layer adopts mica iron oxide and is sheet structure, can enhance the shielding performance and ultraviolet resistance of coating, meanwhile, the fluorocarbon resin in fluorocarbon finish coat layer has excellent chemical inertness and ultraviolet aging resistance its role is to provide long-weathering protection and anti-fouling, maintain the integrity of entire coating system.

Description

Technical Field

[0001] This utility model belongs to the field of marine engineering technology, specifically a marine engineering steel structure with strong corrosion resistance. Background Technology

[0002] Marine engineering steel structures, as core infrastructure for the development and utilization of marine resources, are widely used in major engineering projects such as offshore wind power platforms, oil drilling rigs, cross-sea bridges, submarine pipelines, and port terminals. These structures typically involve huge investments, have a design life of several decades, and operate in extremely harsh environments. Their long-term safety and durability are fundamental to the safety of life and property. However, the harsh marine environment presents these steel structures with unprecedented corrosion challenges, which has always been a key technical bottleneck restricting the long-term safe operation of marine engineering projects.

[0003] Currently, marine steel structures are prone to aging and peeling of coating systems under long-term ultraviolet radiation, mechanical loads, and seawater impact. Furthermore, their anti-corrosion structures are relatively weak, with thin anti-corrosion coatings that are highly susceptible to corrosion in marine conditions. Existing structures lack specific additional protection designs for the highly corrosive splash zones, where the corrosion rate is much higher than in other areas. This makes these areas a weak point in the overall structure's durability, accelerating performance degradation and maintenance requirements. Therefore, this paper proposes a marine engineering steel structure with strong corrosion resistance to address these issues. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology and solve at least one of the technical problems mentioned in the background technology, this utility model proposes a marine engineering steel structure with strong corrosion resistance.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a marine engineering steel structure with strong corrosion resistance, comprising a steel structure body, an anti-corrosion component provided on the surface of the steel structure body, and a wrapping component provided on the outside of the splash zone of the steel structure body. The anti-corrosion component includes an anti-corrosion metal spray coating mounted on the outer surface of the steel structure body. The outer surface of the anti-corrosion metal spray coating is equipped with a heavy-duty anti-corrosion spray coating. The surface of the heavy-duty anti-corrosion spray coating is equipped with an epoxy zinc-rich primer layer. The outer surface of the epoxy zinc-rich primer layer is equipped with an epoxy micaceous iron oxide intermediate paint layer. The outer surface of the epoxy micaceous iron oxide intermediate paint layer is equipped with a fluorocarbon topcoat layer.

[0006] Preferably, the enclosure component includes a first detachable outer shell disposed on the outside of the steel structure body, with sliding grooves on both sides of the first detachable outer shell, and a second detachable outer shell slidably connected inside the two sets of sliding grooves, with a cavity formed between the first detachable outer shell, the second detachable outer shell and the steel structure body.

[0007] Preferably, the cavity is filled with a corrosion inhibitor filler.

[0008] Preferably, the surface of the anti-corrosion metal coating is an arc-sprayed zinc layer.

[0009] Preferably, the plate connections of the steel structure body are fixed with bolts and threaded joints.

[0010] Preferably, the upper and lower ends of the first and second detachable outer shells are respectively provided with sealing rings.

[0011] Preferably, the sealing rings at the upper and lower ends of the first and second detachable housings are both made of seawater-resistant elastic sealant.

[0012] Preferably, both the first and second detachable housings are made of duplex stainless steel or copper-nickel alloy.

[0013] The beneficial effects of this utility model are: This invention provides a marine engineering steel structure with strong corrosion resistance. The arc-sprayed zinc layer in the anti-corrosion metal spray coating acts as the anode, preferentially corroded, thus protecting the steel structure body as the cathode. Secondly, the heavy-duty anti-corrosion spray coating typically uses epoxy resin to enhance the coating's shielding effect. Simultaneously, the epoxy zinc-rich primer layer provides cathodic protection and exhibits excellent adhesion to both the underlying and upper coating layers. The epoxy micaceous iron oxide intermediate coating uses micaceous iron oxide in a flake structure, enhancing the coating's shielding performance and UV resistance. Furthermore, the fluorocarbon topcoat layer contains fluorocarbon resin with excellent chemical inertness, UV aging resistance, and low surface energy, providing long-lasting weather protection and anti-fouling, maintaining the integrity of the entire coating system. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a perspective view of the entire utility model; Figure 2 This is a perspective view of the packaging component in this utility model; Figure 3 This is a three-dimensional anti-corrosion component in this utility model. Figure 1 ; Figure 4 This is a three-dimensional anti-corrosion component in this utility model. Figure 2 .

[0015] Legend: 1. Steel structure body; 2. Anti-corrosion components; 3. Encasing components; 201. Fluorocarbon topcoat layer; 202. Epoxy micaceous iron oxide intermediate coat layer; 203. Epoxy zinc-rich primer layer; 204. Heavy-duty anti-corrosion spray coating layer; 205. Anti-corrosion metal spray coating layer; 301. First detachable outer shell; 302. Sliding groove; 303. Second detachable outer shell; 304. Cavity. Detailed Implementation

[0016] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0017] Specific implementation examples are given below.

[0018] Please see Figure 1 - Figure 4 This utility model provides a marine engineering steel structure with strong corrosion resistance, including a steel structure body 1, an anti-corrosion component 2 on the surface of the steel structure body 1, and a wrapping component 3 on the outside of the splash zone of the steel structure body 1. The anti-corrosion component 2 includes an anti-corrosion metal spray coating 205 mounted on the outer surface of the steel structure body 1, a heavy-duty anti-corrosion spray coating 204 mounted on the outer surface of the anti-corrosion metal spray coating 205, an epoxy zinc-rich primer layer 203 mounted on the surface of the heavy-duty anti-corrosion spray coating 204, an epoxy micaceous iron oxide intermediate paint layer 202 mounted on the outer surface of the epoxy zinc-rich primer layer 203, and a fluorocarbon topcoat layer 201 mounted on the outer surface of the epoxy micaceous iron oxide intermediate paint layer 202.

[0019] During operation, the epoxy micaceous iron oxide intermediate coating 202 adopts a flaky structure of micaceous iron oxide, which further enhances the shielding performance and UV resistance of the coating. The epoxy micaceous iron oxide intermediate coating 202 thickens the coating system and improves the overall mechanical strength and durability. Meanwhile, the fluorocarbon topcoat 201, as the outermost layer, is directly exposed to harsh environments such as marine atmosphere, ultraviolet rays, and wave erosion. The fluorocarbon resin in the fluorocarbon topcoat 201 has excellent chemical inertness, UV aging resistance, and low surface energy.

[0020] Furthermore, such as Figure 1 - Figure 4 As shown, the enclosure component 3 includes a first detachable outer shell 301 disposed on the outside of the steel structure body 1. Sliding grooves 302 are provided on both sides of the first detachable outer shell 301. A second detachable outer shell 303 is slidably connected inside the two sets of sliding grooves 302. A cavity 304 is formed between the first detachable outer shell 301, the second detachable outer shell 303 and the steel structure body 1.

[0021] During operation, when the internal corrosion inhibitor is exhausted or the internal corrosion condition needs to be checked, the second detachable outer shell 303 can be slid open to replenish or replace the filler and to inspect the internal steel structure. This solves the problem of difficult maintenance of splash zone protection and greatly extends the service life of the structure.

[0022] Furthermore, such as Figure 1 - Figure 4 As shown, the cavity 304 is filled with corrosion inhibitor filler, the surface of the anti-corrosion metal spray coating 205 is coated with an arc-sprayed zinc layer, the plate connections of the steel structure body 1 are fixed with bolts and screws, the upper and lower ends of the first detachable outer shell 301 and the second detachable outer shell 303 are respectively provided with sealing rings, the sealing rings at the upper and lower ends of the first detachable outer shell 301 and the second detachable outer shell 303 are both made of seawater resistant elastic sealant, and the outer shells of the first detachable outer shell 301 and the second detachable outer shell 303 are both made of duplex stainless steel or copper-nickel alloy.

[0023] During operation, the first detachable outer shell 301 and the second detachable outer shell 303 are made of seawater corrosion resistant materials such as duplex stainless steel or copper-nickel alloy, which ensures the long-term durability of the first detachable outer shell 301 and the second detachable outer shell 303 in harsh marine environments and will not be damaged before the internal protection system.

[0024] Working principle: During use, the arc-sprayed zinc layer in the anti-corrosion metal spray coating 205 is the primary function. Zinc is chemically more reactive than steel, so in the presence of seawater, it will preferentially corrode as the anode, thus protecting the steel structure body 1, which acts as the cathode. Secondly, the heavy-duty anti-corrosion spray coating 204 typically uses high-performance materials such as epoxy resin and glass flakes, which further enhances the shielding effect of the coating. Its high cross-linking density structure can effectively block the penetration of water, oxygen, and corrosive ions. At the same time, the epoxy zinc-rich primer layer 203 serves two purposes: firstly, the large amount of zinc powder it contains continues to provide cathodic protection; secondly, the epoxy resin component provides cathodic protection to the lower and upper coatings. All three layers possess excellent adhesion and serve as a bridge between the top and bottom layers. Among them, the epoxy micaceous iron oxide intermediate coating 202 uses micaceous iron oxide as a sheet structure, which further enhances the shielding performance and UV resistance of the coating. The epoxy micaceous iron oxide intermediate coating 202 thickens the coating system, improving the overall mechanical strength and durability. Meanwhile, the fluorocarbon topcoat 201, as the outermost layer, is directly exposed to harsh environments such as marine atmosphere, ultraviolet rays, and wave erosion. The fluorocarbon resin in the fluorocarbon topcoat 201 has excellent chemical inertness, UV aging resistance, and low surface energy. Its function is to provide long-lasting weather protection and anti-fouling, maintaining the integrity and aesthetics of the entire coating system.

[0025] Simultaneously, through the sliding connection and combination of the first detachable outer shell 301 and the second detachable outer shell 303, a cavity 304 is formed around the splash zone of the steel structure body 1. The sealing rings at the upper and lower ends are made of seawater-resistant elastic sealant, which can ensure the water tightness and air tightness of the cavity 304, preventing the direct intrusion of external seawater. The cavity 304 is filled with corrosion inhibitor filler, which continuously and slowly volatilizes corrosion inhibitor molecules. The volatilized corrosion inhibitor gas fills the entire cavity 304 and is adsorbed on the surface of the steel structure body 1, forming a monomolecular protective film. This film can effectively inhibit the occurrence of electrochemical corrosion reaction. Even if a small amount of moisture seeps in, it can be neutralized, thereby fundamentally creating a low-corrosion microenvironment. When the internal corrosion inhibitor is exhausted or the internal corrosion condition needs to be checked, the second detachable outer shell 303 can be slid open to replenish or replace the filler and to inspect the internal steel structure. This solves the problem of difficult maintenance of splash zone protection and greatly extends the service life of the structure.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A marine engineering steel structure with strong corrosion resistance, comprising a steel structure body (1), characterized in that: The surface of the steel structure body (1) is provided with anti-corrosion components (2), and the outside of the splash area of ​​the steel structure body (1) is provided with wrapping components (3). The anti-corrosion component (2) includes an anti-corrosion metal spray coating (205) assembled on the outer surface of the steel structure body (1). The outer surface of the anti-corrosion metal spray coating (205) is equipped with a heavy-duty anti-corrosion spray coating (204). The surface of the heavy-duty anti-corrosion spray coating (204) is equipped with an epoxy zinc-rich primer layer (203). The outer surface of the epoxy zinc-rich primer layer (203) is equipped with an epoxy micaceous iron oxide intermediate paint layer (202). The outer surface of the epoxy micaceous iron oxide intermediate paint layer (202) is equipped with a fluorocarbon topcoat layer (201).

2. The marine engineering steel structure with strong corrosion resistance according to claim 1, characterized in that: The package assembly (3) includes a first detachable outer shell (301) disposed on the outside of the steel structure body (1). The first detachable outer shell (301) has sliding grooves (302) on both sides. The two sets of sliding grooves (302) are slidably connected to a second detachable outer shell (303). A cavity (304) is formed between the first detachable outer shell (301), the second detachable outer shell (303) and the steel structure body (1).

3. A marine engineering steel structure with strong corrosion resistance according to claim 2, characterized in that: The cavity (304) is filled with corrosion inhibitor filler.

4. A marine engineering steel structure with strong corrosion resistance according to claim 1, characterized in that: The surface of the anti-corrosion metal spray coating (205) is coated with an arc-sprayed zinc layer.

5. A marine engineering steel structure with strong corrosion resistance according to claim 1, characterized in that: The plate connections of the steel structure body (1) are fixed with bolts and screws.

6. A marine engineering steel structure with strong corrosion resistance according to claim 2, characterized in that: Sealing rings are provided at the upper and lower ends of the first detachable housing (301) and the second detachable housing (303).

7. A marine engineering steel structure with strong corrosion resistance according to claim 2, characterized in that: The sealing rings at the upper and lower ends of the first removable housing (301) and the second removable housing (303) are both made of seawater-resistant elastic sealant.

8. A marine engineering steel structure with strong corrosion resistance according to claim 2, characterized in that: The outer shells of the first removable outer shell (301) and the second removable outer shell (303) are both made of duplex stainless steel or copper-nickel alloy.

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