Coating structure for steel structure in extremely severe service environment

Abstract

The utility model discloses a coating structure for a steel structure in an extremely severe service environment, and belongs to the technical field of coating structures. The coating structure comprises a bonding layer and a coating structure body, and the coating structure body comprises a bottom layer, a reinforcing layer, a polyurea paint layer, a toughening layer, a protective layer, an isolating layer and a repairing layer; the bottom layer is located at the bottommost part of the coating structure body, a reinforcing layer is arranged on the outer surface of the bottom layer, a polyurea paint layer is arranged on the outer surface of the reinforcing layer, a toughening layer is arranged on the outer surface of the high-solid-content polyurea paint layer, a protective layer is arranged on the outer surface of the toughening layer, and an isolating layer is arranged on the outer surface of the protective layer. And a repairing layer is arranged on the outer surface of the isolating layer. According to the utility model, the protection problem of the steel structure in an extremely severe service environment can be solved.

Description

Technical Field

[0001] This utility model relates to a coating structure for steel structures used in extremely harsh service environments, and belongs to the field of coating structure technology. Background Art

[0002] Traditionally, steel structures refer to building structures made of steel. However, with the widespread use of various types and grades of steel in industry, the concept of steel structures has expanded. All equipment and facilities using steel as their supporting framework can be called steel structures, including railings, storage tanks, offshore drilling platforms, onshore wind turbine towers and foundations, mining vehicles, and the inner walls of railway freight cars.

[0003] According to the ISO 12944-2-2018 standard classification, steel structures used in atmospheric corrosion environments of levels C1-C3 can meet service requirements with light and moderate anti-corrosion measures. Steel structures used in atmospheric corrosion environments of levels C4-CX are mostly heavy assets with long service lives, such as offshore drilling platforms, facing extremely harsh service environments including wind and sand erosion, ultraviolet radiation, extreme temperature differences, rain and snow, icing, humidity, water vapor, salt spray erosion, and mechanical impact. The most economical current protective measure is to use traditional coatings to extend the service life of the steel structure, but the effect is not particularly ideal, and the coating lacks various functions such as antistatic properties, moisture and water resistance, radiation resistance, self-repair, and self-cleaning. Utility Model Content

[0004] The purpose of this invention is to provide a high-solids polyurea paint coating structure for steel structures used in extremely harsh service environments, in order to solve the protection problems of steel structures used in atmospheric corrosion environments of C4-CX levels. Polyaspartic acid ester polyurea coating is a new type of polyurea coating that, compared with traditional coatings, has advantages such as fast curing speed, low VOC content, high film thickness and high solids content that can be achieved in a single application, and environmental friendliness.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A coated structure for steel structures under extremely harsh service environments includes a bonding layer and a coated structure body, wherein the coated structure body includes a base layer, a reinforcing layer, a polyurea paint layer, a toughening layer, a protective layer, an isolation layer, and a repair layer;

[0007] The bottom layer is located at the very bottom of the coating structure. The outer surface of the bottom layer has a reinforcing layer that improves the impact strength of the coating structure. The outer surface of the reinforcing layer has a high-solids-content polyurea paint layer, which provides corrosion resistance, moisture resistance, water resistance, wear resistance, impact resistance, and tensile strength. The outer surface of the high-solids-content polyurea paint layer has a toughening layer, which makes the coating structure less prone to cracking and allows for rapid recovery from plastic deformation. The outer surface of the toughening layer has a protective layer, which provides aging resistance. The outer surface of the protective layer has an isolation layer, which improves the self-cleaning and non-fouling properties of the coating structure. The outer surface of the isolation layer has a repair layer, which enables the coating structure to self-repair.

[0008] Preferably, a bonding layer is provided at the bottom of the substrate, the bonding layer being composed of an epoxy resin paint layer; the bonding layer tightly fixes the coating structure body to the steel structure substrate.

[0009] Preferably, the bottom layer is a polyester resin coating.

[0010] Preferably, the reinforcing layer is a carbon fiber braided layer.

[0011] Preferably, the polyurea coating is a high-solids-content polyaspartic acid ester polyurea coating.

[0012] Preferably, the toughening layer is a polyolefin elastomer layer.

[0013] Preferably, the protective layer is an ultraviolet absorbing layer.

[0014] Preferably, the insulating layer is composed of a low surface energy siloxane hybrid polymer and an antistatic agent.

[0015] Preferably, the repair layer is a microcapsule repair layer.

[0016] In the above coating structure, the thickness of the bonding layer ranges from 40 to 50 micrometers. The thickness of the coating structure body ranges from 510 to 590 micrometers, and the thickness ranges of each layer are as follows: bottom layer 40-50 micrometers, reinforcing layer 40-50 micrometers, polyurea paint layer 200-220 micrometers, toughening layer 40-50 micrometers, protective layer 60-70 micrometers, isolation layer 60-70 micrometers, and repair layer 70-80 micrometers.

[0017] The high-solids-content polyurea paint coating structure for steel structures used in extremely harsh service environments provided by this utility model offers the following advantages:

[0018] By setting a bonding layer, the coating structure of this steel structure can be tightly and firmly bonded to the steel structure substrate; by setting a bottom layer, the coating structure of this steel structure can be tightly adhered to the bonding layer; by setting a reinforcing layer, the high-solids polyurea paint coating structure of this steel structure can have better impact strength; by applying a high-solids polyurea paint layer, the high-solids polyurea paint coating structure of this steel structure can be corrosion-resistant, moisture-proof, waterproof, wear-resistant, impact-resistant, and tensile-resistant; by setting a toughening layer, the high-solids polyurea paint coating structure of this steel structure is not easy to crack and has a fast plastic deformation recovery effect; by setting a protective layer, the high-solids polyurea paint coating structure of this steel structure can withstand ultraviolet radiation and aging resistance; by setting an isolation layer, the high-solids polyurea paint coating structure of this steel structure achieves self-cleaning, not easy to ice, and not easy to be soiled; by setting a repair layer, the high-solids polyurea paint structure of this steel structure can self-repair after being damaged by mechanical impact, restoring its original surface characteristics and functions.

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a coated structure body for steel structures under extremely harsh service environments according to this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of a coating structure for steel structures used in extremely harsh service environments, according to this utility model.

[0022] In the diagram: 1. Coating structure body; 2. Underlayer; 3. Reinforcing layer; 4. Polyurea paint layer; 5. Toughening layer; 6. Protective layer; 7. Isolation layer; 8. Repair layer; 9. Bonding layer. DETAILED DESCRIPTION Example

[0023] Taking the steel structure of an offshore drilling platform as an example, a high-solids-content polyurea paint coating structure for steel structures is provided, such as... Figure 1 and 2 As shown, the coating structure includes a coating structure body 1 and a bonding layer 9. The coating structure body 1 includes a bottom layer 2, a reinforcing layer 3, a polyurea paint layer 4, a toughening layer 5, a protective layer 6, an isolation layer 7, and a repair layer 8. The bottom layer 2 is located at the bottom of the coating structure body 1. The outer surface of the bottom layer 2 is provided with a reinforcing layer 3. The outer surface of the reinforcing layer 3 is coated with a high-solids polyurea paint layer 4. The outer surface of the high-solids polyurea paint layer 4 is provided with a toughening layer 5. The outer surface of the toughening layer 5 is provided with a protective layer 6. The outer surface of the protective layer 6 is provided with an isolation layer 7. The outer surface of the isolation layer 7 is provided with a repair layer 8.

[0024] Furthermore, the bottom of the base layer 2 is provided with a bonding layer 9, which is an epoxy resin paint layer; the bonding layer makes the coating structure body tightly fixed to the steel structure substrate.

[0025] As a preferred technical solution, the bottom layer 2 is a polyester resin coating.

[0026] As a preferred technical solution, the reinforcing layer 3 is a carbon fiber woven layer, which is made of carbon fiber material, so that the high solids content polyurea paint structure used in this steel structure can have better impact strength.

[0027] As a preferred technical solution, the polyurea paint layer 4 uses a high-solids-content polyaspartic acid ester polyurea coating, which makes the high-solids-content polyurea paint structure used in this steel structure corrosion-resistant, moisture-proof, waterproof, wear-resistant, impact-resistant, and tensile-resistant.

[0028] As a preferred technical solution, the toughening layer 5 is a polyolefin elastomer layer, which is made of polyolefin elastomer material, so that the high solids content polyurea paint structure used in this steel structure has the effect of not being easy to crack and having fast plastic deformation recovery.

[0029] As a preferred technical solution, the protective layer 6 is an ultraviolet absorbing layer, made of a material containing an ultraviolet absorber, wherein the mass content of the ultraviolet absorber is 5% and the mass content of the polyurethane adhesive is 95%, which enables the high solids content polyurea paint structure used in this steel structure to withstand ultraviolet radiation and aging resistance, thus extending the service life of the steel structure coating structure under extremely harsh service environments.

[0030] As a preferred technical solution, the isolation layer 7 is composed of a low surface energy siloxane hybrid polymer and an antistatic agent. The low surface energy siloxane hybrid polymer has a mass content of 97%, and the antistatic agent has a mass content of 3%, which enables the high solids polyurea paint structure used in this steel structure to achieve the effects of self-cleaning, not easy to freeze, and not easy to get dirty.

[0031] As a preferred technical solution, the repair layer 8 is a microcapsule repair layer, made of microcapsule repair agent material, wherein the mass content of microcapsule repair agent is 12% and the mass content of polyurethane adhesive is 88%, which enables the high solids content polyurea paint structure of this steel structure to achieve self-repair after being damaged by mechanical impact, restoring its original surface properties and functions.

[0032] Preferably, the thickness of the bonding layer is 40-50 micrometers, and the thickness of the coating structure body is 510-590 micrometers, wherein the thickness ranges of each layer are as follows: bottom layer 40-50 micrometers, reinforcing layer 40-50 micrometers, polyurea paint layer 200-220 micrometers, toughening layer 40-50 micrometers, protective layer 60-70 micrometers, isolation layer 60-70 micrometers, and repair layer 70-80 micrometers.

[0033] The high-solids polyurea paint coating structure for steel structures used in extremely harsh service environments provided by this utility model is specifically applied by first fixing the bonding layer 9 to the steel structure substrate, and then applying appropriate pressure to firmly bond the two together. By applying the underlayer 2 on top of the bonding layer 9, it can be well fixed and bonded to both the bonding layer 9 and the steel structure substrate. The reinforcing layer 3 is made of woven carbon fiber material. By setting the reinforcing layer 3, the high-solids polyurea paint structure for steel structures can have better impact strength. The polyurea paint layer 4 is a high-solids polyaspartic acid ester polyurea coating. By setting the high-solids polyurea paint layer 4, the high-solids polyurea paint structure for steel structures has anti-corrosion, moisture-proof, waterproof, wear-resistant, impact-resistant, and tensile-resistant effects. The toughening layer 5 is made of polyolefin elastomer material. By setting toughening layer 5, the high-solids polyurea paint structure used in this steel structure is less prone to cracking and has a fast recovery of plastic deformation. Protective layer 6 is made of a material containing ultraviolet absorbers. By setting protective layer 6, the high-solids polyurea paint structure used in this steel structure can withstand ultraviolet radiation and aging, extending the service life of the steel structure coating structure in extremely harsh service environments. Isolation layer 7 is made of a low surface energy siloxane hybrid polymer and an antistatic agent. By setting isolation layer 7, the high-solids polyurea paint structure used in this steel structure achieves self-cleaning, is not prone to ice formation, and is not prone to dirt. Repair layer 8 is made of microcapsule repair agent. By setting repair layer, the high-solids polyurea paint structure used in this steel structure can achieve self-repair after being damaged by mechanical impact, restoring its original surface characteristics and functions.

[0034] In the description of this utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the purpose of simplifying the description of this utility model, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] Finally, it should be noted that the above embodiments are merely for illustrating the technical solution of this utility model and are not intended to limit it. Any other modifications and equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A coated structure for steel structures used in extremely harsh service environments, characterized in that: It includes a bonding layer and a coating structure body, wherein the coating structure body includes a base layer, a reinforcing layer, a polyurea paint layer, a toughening layer, a protective layer, an isolation layer, and a repair layer; The bottom layer is located at the very bottom of the coating structure body. The outer surface of the bottom layer is provided with a reinforcing layer. The outer surface of the reinforcing layer is provided with a high-solids polyurea paint layer. The outer surface of the high-solids polyurea paint layer is provided with a toughening layer. The outer surface of the toughening layer is provided with a protective layer. The outer surface of the protective layer is provided with an isolation layer. The outer surface of the isolation layer is provided with a repair layer.

2. The coated structure for steel structures under extremely harsh service environments according to claim 1, characterized in that: A bonding layer is provided at the bottom of the base layer, which is composed of an epoxy resin paint layer; the bonding layer tightly fixes the coating structure body to the steel structure substrate.

3. The coated structure for steel structures under extremely harsh service environments according to claim 1, characterized in that: The bottom layer is a polyester resin coating.

4. The coated structure for steel structures under extremely harsh service environments according to claim 1, characterized in that: The reinforcing layer is a carbon fiber braided layer, which improves the impact strength of the coating structure.

5. The coated structure for steel structures under extremely harsh service environments according to claim 1, characterized in that: The polyurea coating is a high-solids-content polyaspartic acid ester polyurea coating, which has the functions of corrosion resistance, moisture resistance, water resistance, wear resistance, impact resistance, and tensile strength.

6. The coated structure for steel structures under extremely harsh service environments according to claim 1, characterized in that: The toughening layer is a polyolefin elastomer layer, which makes the coating structure less prone to cracking and allows for rapid recovery of plastic deformation.

7. The coated structure for steel structures under extremely harsh service environments according to claim 1, characterized in that: The protective layer is an ultraviolet absorption layer, which has the functions of withstanding ultraviolet radiation and aging resistance.

8. The coated structure for steel structures under extremely harsh service environments according to claim 1, characterized in that: The isolation layer is composed of a low surface energy siloxane hybrid polymer and an antistatic agent. The isolation layer improves the self-cleaning, anti-icing, and anti-fouling functions of the coating structure.

9. The coated structure for steel structures under extremely harsh service environments according to claim 1, characterized in that: The repair layer is a microcapsule repair layer; it enables the coating structure to self-repair after being damaged by mechanical impact, restoring its original surface properties and functions.

10. The coated structure for steel structures under extremely harsh service environments according to claim 1, characterized in that: The thickness of the bonding layer ranges from 40 to 50 micrometers; the thickness of the coating structure body ranges from 510 to 590 micrometers, wherein the thickness ranges of each layer are as follows: bottom layer 40-50 micrometers, reinforcing layer 40-50 micrometers, polyurea paint layer 200-220 micrometers, toughening layer 40-50 micrometers, protective layer 60-70 micrometers, isolation layer 60-70 micrometers, and repair layer 70-80 micrometers.

Images