Graphene anticorrosive coating for railway steel structure rain shed

Abstract

The utility model relates to a graphene anticorrosive coating for a railway steel structure rain shed. The graphene anti-corrosion coating for the railway steel structure rain shed comprises a bottom layer and a surface layer, the bottom layer is used for being embedded with steel, the bottom layer comprises a middle layer, a plurality of first protrusions and second protrusions, the first protrusions and the second protrusions are used for being embedded with the steel, the first protrusions are located on the inner side face of the middle layer, and the second protrusions are located on the outer surface of the middle layer. The second protrusions are evenly filled with the surface layer so that the outer surface of the graphene anti-corrosion coating can be a smooth plane, and then the ultraviolet-proof capacity of the surface layer is improved. The bottom layer of the graphene anti-corrosion coating for the railway steel structure rain shed is provided with the plurality of bulges I, and the bulges I can be embedded with the surface of steel, so that the bonding strength of the graphene anti-corrosion coating and the surface of the steel is improved, and the graphene anti-corrosion coating is prevented from falling off, peeling, rusting and cracking.

Description

Technical Field

[0001] The utility model belongs to the technical field of anti-corrosion coatings, and in particular relates to a graphene anti-corrosion coating for a railway steel structure wind and rain shed. Background Art

[0002] In the prior art, steel structures are usually protected by coating their surfaces with an anti-corrosion layer to protect the exposed steel. Railway steel structure shelters are built in various places, and the steel is generally directly exposed to the air. Some are in harsh environments for a long time, such as: high humidity and salt fog in the southeast coastal areas; cold climate in the northeast; severe wind and sandstorms in the northwest all year round, large temperature difference between day and night; strong ultraviolet rays. The anti-corrosion coating on the outer surface of steel in these environments for a long time is prone to cracking, aging, peeling, and falling off, which cannot meet the anti-corrosion requirements. Utility Model Content

[0003] The utility model aims to provide a graphene anti-corrosion coating for railway steel structure wind and rain sheds to solve the technical problem that the existing anti-corrosion coating is easy to fall off, peel, rust and crack, resulting in failure to meet the anti-corrosion requirements.

[0004] In order to achieve the above objectives, the technical solution adopted by the utility model is:

[0005] A graphene anti-corrosion coating for a railway steel structure canopy, the graphene anti-corrosion coating comprising a bottom layer and a surface layer for engaging with steel, the bottom layer comprising an intermediate layer, a plurality of protrusions one and two for engaging with steel, the protrusions one being located on the inner side of the intermediate layer, the protrusions two being located on the outer surface of the intermediate layer, and the surface layer being uniformly filled in the protrusions two so that the outer surface of the graphene anti-corrosion coating is a smooth plane, thereby improving the UV protection capability of the surface layer.

[0006] Furthermore, the protrusion one and the protrusion two are integrally formed with the middle layer; the sizes of the plurality of protrusions one and two are different, two adjacent protrusions one are connected so that the inner side surface of the middle layer is uneven, and then embedded with the steel; two adjacent protrusions two are connected so that the outer surface of the middle layer is uneven.

[0007] Furthermore, the height difference of the protrusion 1 is between 10-15 microns; the height difference of the protrusion 2 is between 10-15 microns.

[0008] Furthermore, the bottom layer is made of a mixture of graphene and short fibers, so that there are multiple protrusions 1 and 2 on the inner and outer sides of the bottom layer, the length of the short fibers is between 15-40 microns, and the short fibers are carbon nanotube short fibers.

[0009] Furthermore, the short fibers are inserted into the middle layer so as to form a plurality of protrusions 1 and 2 on both inner and outer sides of the middle layer.

[0010] Furthermore, the surface layer is formed by mixing graphene and a surfactant.

[0011] Beneficial effects of the utility model:

[0012] The bottom layer of the graphene anti-corrosion coating used for the railway steel structure wind and rain canopy of the utility model is provided with a plurality of protrusions, which can be embedded with the surface of the steel material to increase the bonding strength between the graphene anti-corrosion coating and the surface of the steel material and avoid shedding, peeling, rusting and cracking of the graphene anti-corrosion coating.

[0013] The graphene anti-corrosion coating for railway steel structure wind and rain canopies of the utility model introduces a quick-drying design, and the construction is convenient and efficient, the coating process is greatly simplified, the complicated procedures of traditional construction are reduced, and the quality problems caused by the compatibility of conventional anti-corrosion coating primer + intermediate paint + topcoat matching coatings are avoided. It is particularly suitable for the special characteristics of skylight construction with short operation time and difficult key points, which saves a lot of manpower, material resources and costs, and reduces safety hazards.

[0014] Graphene has the characteristics of water and oil repellency, and the sheet structure of graphene has a shielding maze effect, which can greatly extend the path of corrosive media such as acid, alkali, salt, water, oxygen, etc. to reach steel, thereby improving the anti-corrosion ability of the graphene anti-corrosion coating. The surface layer of the graphene anti-corrosion coating for railway steel structure wind and rain canopy of the utility model is a mixture of graphene and surfactant, and the surfactant can make the surface layer of graphene evenly arranged, and at the same time make the outer surface of the surface layer a smooth plane, which can improve the waterproof and UV protection ability of the surface layer. The bottom layer is made of a mixture of graphene and short fibers. Graphene has excellent properties such as resistance to neutral salt spray, impact resistance, adhesion wall, resistance to artificial aging, compatibility, etc., and can effectively solve the problems of rust on the steel structure of the platform canopy, falling off of the fireproof layer and roof leakage, which are urgently needed to be rectified in the current coastal and inland high-speed railway passenger stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional schematic diagram of the application of the graphene anti-corrosion coating for the railway steel structure wind and rain shelter in Example 1;

[0016] Figure 2 This is a schematic cross-sectional view of the bottom layer of the graphene anti-corrosion coating used for the railway steel structure wind and rain shelter in Example 1;

[0017] Figure 3 This is a schematic diagram of the structure of the short fibers inserted into the middle layer of the graphene anti-corrosion coating for the railway steel structure wind and rain shelter in Example 1;

[0018] Figure 4This is a schematic cross-sectional view of the surface layer of the graphene anti-corrosion coating used for the railway steel structure canopy in Example 1.

[0019] In the figure: 1. Steel; 2. Bottom layer; 3. Middle layer; 4. Surface layer; 5. Graphene; 6. Short fiber; 7. Protrusion one; 8. Protrusion two. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] The implementation example of the graphene anti-corrosion coating for railway steel structure wind and rain shelter in the utility model is as follows: Figure 1-4 shown.

[0022] Example 1

[0023] The graphene anticorrosive coating for the railway steel structure wind and rain shelter of this embodiment includes a bottom layer 2 and a surface layer 4, the bottom layer includes an intermediate layer 3, a plurality of protrusions 1 7 located inside the intermediate layer 3, and a plurality of protrusions 2 8 located outside the intermediate layer 3, the protrusions 1 7 and the protrusions 2 8 are integrally formed with the intermediate layer 3, the sizes of the plurality of protrusions 1 7 are different, and the adjacent protrusions 1 7 are connected so that the inner side of the intermediate layer 3 is uneven; the sizes of the plurality of protrusions 2 8 are different, and the adjacent protrusions 2 8 are connected so that the outer side of the intermediate layer 3 is uneven. The height difference between the protrusions 1 7 and the protrusions 2 8 is between 10-15 microns. The bottom layer is made of a mixture of graphene and short fibers 6, and the short fibers 6 are inserted into the intermediate layer 3 to form a plurality of protrusions 1 7 and a plurality of protrusions 2 8 on both sides of the inner and outer sides of the intermediate layer 3. The length of the short fibers 6 is between 15-40 microns, and the short fibers 6 are carbon nanotube short fibers 6. The surface layer 4 is made of a mixture of graphene 5 and a surfactant, and the surface layer 4 is evenly filled in the protrusions 2 8. The surfactant can make the graphene evenly arranged in a layer so as to improve the anti-ultraviolet function of the surface layer, and the surfactant is sodium dodecyl sulfate. When the graphene anti-corrosion coating for the railway steel structure canopy of this embodiment is used, the surface of the steel 1 is firstly grooved with sandpaper (not shown in the figure), and the oil and dust on the surface of the steel 1 are removed by sandpaper polishing, and then the bottom layer is brushed on the polished surface of the steel 1. Since the inner surface of the bottom layer 2 has a plurality of protrusions 7, the protrusions 7 are embedded in the grooves of the steel 1 so that the graphene anti-corrosion coating for the railway steel structure canopy of this embodiment is firmly combined with the steel 1 to avoid falling off, peeling, rusting, and cracking. After waiting for 10-15 minutes at room temperature for the bottom layer to dry, the surface layer 4 is brushed. Since the outer side of the bottom layer has a plurality of protrusions 8, when brushing the surface layer 4, the surface layer 4 can be filled in the protrusions 8, thereby making the connection between the surface layer 4 and the bottom layer more firmly, and at the same time making the outer surface of the surface layer a smooth plane, the waterproof and anti-ultraviolet capabilities of the surface layer can be improved. The grooves on the surface of the steel material 1 may be long strip-shaped grooves, the depth of the grooves is controlled between 15-17 microns, and the distance between every two adjacent grooves is controlled between 5-8 microns.

[0024] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0025] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A graphene anti-corrosion coating for railway steel structure wind and rain shelter, characterized in that: The graphene anti-corrosion coating includes a bottom layer and a surface layer for embedding with steel. The bottom layer includes an intermediate layer, a plurality of protrusions one and two for embedding with steel. The protrusion one is located on the inner side of the intermediate layer, and the protrusion two is located on the outer surface of the intermediate layer. The surface layer is evenly filled in the protrusion two so that the outer surface of the graphene anti-corrosion coating is a smooth plane, thereby improving the UV protection ability of the surface layer.

2. The graphene anti-corrosion coating for railway steel structure shelter according to claim 1, characterized in that: The protrusions 1 and 2 are integrally formed with the middle layer; the sizes of the multiple protrusions 1 and 2 are different, two adjacent protrusions 1 are connected so that the inner side surface of the middle layer is uneven, and then embedded with the steel; two adjacent protrusions 2 are connected so that the outer surface of the middle layer is uneven.

3. The graphene anti-corrosion coating for railway steel structure shelter according to claim 2, characterized in that: The height difference of the protrusion 1 is between 10-15 microns; the height difference of the protrusion 2 is between 10-15 microns.

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