CN214400678U - Support with hot spraying metal composite coating structure - Google Patents
Support with hot spraying metal composite coating structure Download PDFInfo
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- CN214400678U CN214400678U CN202022810627.7U CN202022810627U CN214400678U CN 214400678 U CN214400678 U CN 214400678U CN 202022810627 U CN202022810627 U CN 202022810627U CN 214400678 U CN214400678 U CN 214400678U
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Abstract
The utility model discloses a hot spraying metal composite coating structure support outwards includes in proper order on the steel and iron base member surface of support: thermally spraying a metal coating and a paint coating; wherein the surface cleanliness of the steel substrate is not lower than Sa2 grade, and the roughness is 20-100 mu m; the thickness of the thermal spraying metal coating is 80-200 μm; the thickness of the coating layer is 40-280 μm. The coating layer can be preferably of a water-based coating structure, and is clean and environment-friendly. The invention has simple design, environment-friendly process and durable and reliable corrosion resistance, and effectively solves the problems in the prior art.
Description
Technical Field
The utility model belongs to bridge building engineering material field specifically is a relate to a hot spraying metal composite coating structure support.
Background
The support is a functional component for connecting the main beam of the bridge and the bridge pier, and the support can stretch out and draw back and rotate in the working process through proper construction, so that the deformation limit of the bridge pier on the main beam is eliminated, and the main beam can stretch out and draw back and rotate freely. The bridge support is classified into three types according to the motion characteristics, namely a fixed support, a one-way movable support and a multi-way sliding support; the steel support and the rubber support are divided according to materials, and the rubber support has a limited service life, so that the steel supports are widely applied.
Although the support is positioned under the beam, the corrosion environment of the support is more severe than that of the bridge site, besides various corrosion factors caused by working conditions, the support also faces special corrosion factors such as rainwater irrigation in summer, ice salt and snow water removal in winter, long-term moisture retention and the like, and the support made of common steel is difficult to meet the requirement of engineering design life.
CN200920102415.4 provides a corrosion-resistant support, and the outer wall of upper bedplate and lower bedplate cast steel main part is provided with the electric arc and spouts the aluminium lamination, and the electric arc spouts the aluminium lamination outside and has sprayed heavy anticorrosive paint layer. The utility model discloses an adopt electric arc to spout the aluminium lamination + heavy anticorrosive paint layer and show the corrosion resisting property who has improved the support. However, the corrosion prevention research and engineering application of the existing thermal spraying metal coating show that the thermal spraying aluminum coating has the problem of pitting corrosion and obviously reduces the protective performance; in addition, the green development strategy that green water Qingshan is the Jinshan Yinshan is established in China at present, heavy-duty anticorrosive paint and the coating thereof have great environmental pollution, the popularization and the application are difficult to continue, and innovation and improvement are needed.
Disclosure of Invention
Aiming at the technical problems in the prior art, the utility model discloses a thermal spraying metal composite coating structure support, wherein, the thermal spraying metal coating adopts zinc or zinc alloy and rare earth alloy to solve the problem of aluminum pitting; the coating can adopt water paint, solves the environmental protection problem of solvent paint, and the utility model has the advantages of simple design, environment-friendly process, corrosion resistance, durability and reliability. The specific technical scheme is as follows:
a hot spraying metal composite coating structure support is characterized by comprising the following components in sequence from the surface of a steel matrix of the support to the outside: thermally spraying a metal coating and a paint coating;
wherein the surface cleanliness of the steel substrate is not lower than Sa2 grade, and the roughness is 20-100 mu m; the thickness of the thermal spraying metal coating is 80-200 μm; the thickness of the coating layer is 40-280 μm.
The thermal sprayed metal coating can also be preferably a rare earth alloy coating, such as a rare earth aluminum alloy coating or a rare earth aluminum magnesium alloy coating or a rare earth zinc aluminum alloy coating; the thickness of the thermal spraying rare earth alloy coating is 80-160 mu m.
The thickness of the coating is 40-280 μm, and the coating can be a single coating or a composite coating coated by the coating. The composite coating structure coated by the paint sequentially comprises the following components from thermal spraying metal coating upwards: the coating comprises a primer seal coating, a middle paint coating and a weather-resistant finish coating, wherein the thickness of a composite coating coated by the coating is 90-280 mu m.
The coating can be the existing solvent type coating varieties, such as corresponding epoxy seal primer, epoxy intermediate paint, polyurethane finish paint and the like; or the existing water-based paint varieties such as corresponding water-based primer, water-based intermediate paint and water-based finish paint which are the existing corresponding paint products supplied by the market.
The seal primer can penetrate into the thermal spraying metal coating, so that the thickness of the seal primer coating is not more than 50 mu m, and the thickness of the seal primer coating can be even ignored during the actual engineering design; the thickness of the intermediate paint coating is 40-150 mu m; the thickness of the weather-resistant finish coat is 40-80 mu m.
The hot spraying zinc and the alloy coating thereof have good cathode protection effect and do not have the problem of pitting corrosion existing in aluminum. To the point corrosion problem that aluminium exists, the utility model relates to an adopt rare earth alloy coating, like prior art such as rare earth aluminum alloy coating or rare earth almag coating or rare earth zinc-aluminium alloy coating, effectively solve the point corrosion problem that aluminium and alloy exist.
The utility model discloses still design and adopt water based paint application coating, when the good infiltration of performance water based paint coating and shielding protective properties, guarantee whole application production green.
The utility model has the advantages that:
the utility model discloses a hot spraying metal composite coating structure, wherein hot spraying metal coating adopts the hot spraying zinc or zinc alloy or zinc, the rare earth alloy of aluminium etc. to have the metal coating of pitting defect, and the application coating is preferred to be adopted the water based paint coating, and whole hot spraying metal composite coating structure has formed excellent cathodic protection and shielding protective properties to support steel base member, has effectively solved the prior art problem, the utility model discloses hot spraying metal composite coating structural design is simple and direct, and the technology environmental protection is anticorrosive durable reliable.
Description of the drawings:
FIG. 1 is a schematic illustration of a support of example 1 thermal spray coated metal composite coating construction;
FIG. 2 is a schematic illustration of a support of the thermal sprayed metal composite coating structure of examples 2-3;
wherein: 1-steel substrate, 2-thermal spraying metal coating, 3-paint coating, 301-primer sealing coating, 302-intermediate paint coating and 303-weather-resistant finish paint coating.
Detailed Description
The present invention will be further described with reference to the following examples and accompanying drawings.
Example 1:
as shown in figure 1, a thermal spraying metal composite coating structure support is characterized in that: the support with the thermal spraying metal composite coating structure sequentially comprises the following components from the surface of a steel matrix 1 of the support to the outside: thermally spraying a metal coating 2 and a paint coating 3;
firstly, the surface of the steel substrate 1 of the support is subjected to mechanical jet cleaning treatment, wherein the surface has the cleanliness of Sa2 grade as per the roughness of 40-80 mu m; then, carrying out electric arc spraying treatment on the metal zinc wire to form a thermal spraying metal coating 2; and then carrying out multi-pass coating treatment on the thermal spraying metal coating 2 by using a commercial waterborne polyurethane finish to form a coating 3, wherein the total thickness is controlled to be 40-280 mu m.
Example 2:
as shown in fig. 2, a thermal spraying metal composite coating structure support is characterized in that: the support with the thermal spraying metal composite coating structure sequentially comprises the following components from the surface of a steel matrix 1 of the support to the outside: thermally spraying a metal coating 2 and a paint coating 3;
the paint coating 3 is: the composite coating is 90-280 μm thick, and the structure of the composite coating is formed by the following steps from thermal spraying of a metal coating to the outside in sequence: a primer sealer coat 301, a midcoat coat 302, and a weatherable topcoat coat 303.
Firstly, performing mechanical jet cleaning treatment on the surface of the steel substrate of the support, wherein the surface has the cleanliness of grade Sa3 and the roughness of 40-100 mu m; then, carrying out electric arc spraying treatment on the alloy by adopting a commercially available rare earth aluminum wire to form a thermal spraying metal coating 2, wherein the thickness of the thermal spraying rare earth aluminum coating is 80-160 mu m; then, sealing the thermal spraying rare earth aluminum coating by using a commercially available epoxy sealing primer to form a primer sealing coating 301, wherein the thickness of the primer sealing coating is not more than 20 mu m; coating a commercial epoxy micaceous iron oxide intermediate paint on the primer sealing coating to form an intermediate paint coating 302 with the thickness of 40-80 mu m; a commercially available fluorocarbon topcoat was then applied over the intermediate paint coat 302 to form a weatherable topcoat coat 303 having a thickness of 40-80 μm.
Example 3:
as shown in fig. 2, a thermal spraying metal composite coating structure support is characterized in that: the support with the thermal spraying metal composite coating structure is characterized in that the surface of a steel matrix 1 of the support is wrapped with: thermally spraying a metal coating 2 and a paint coating 3;
the paint coating 3 is: the composite coating is 90-280 μm thick, and the structure of the composite coating is formed by the following steps from thermal spraying of a metal coating to the outside in sequence: a primer sealer coat 301, a midcoat coat 302, and a weatherable topcoat coat 303.
Firstly, the surface of the steel substrate of the support is subjected to mechanical jet cleaning treatment, wherein the surface has cleanliness Sa2 grade as per the roughness of 40-80 mu m; then, carrying out electric arc spraying treatment on the zinc-aluminum alloy wire to form a thermal spraying metal coating 2 with the thickness of 80-200 mu m; then, sealing the thermal spraying metal coating by using a commercially available waterborne epoxy primer to form a primer sealing coating 301, wherein the thickness of the primer sealing coating is not more than 20 mu m; coating a commercially available water-based epoxy intermediate paint on the primer seal coat to form an intermediate paint coat 302 with the thickness of 70-150 mu m; and finally, coating the intermediate paint coating with a commercially available waterborne polyurethane finish to form a weather-resistant finish paint coating 303 with the thickness of 40-60 mu m.
The corrosion resistance comparison is carried out on the embodiment 1, the embodiment 2 and the embodiment 3 with the prior art (the arc aluminum spraying layer and the heavy anti-corrosion coating), the test data are shown in the table 1, and the performance of the utility model in the process environmental protection property, the neutral salt spray test and the grid-drawing salt spray test is obviously superior to the prior art.
TABLE 1. examples of the present invention compare the situation with the prior art test
Claims (1)
1. The utility model provides a hot spraying metal composite coating structure support which characterized in that: the support with the thermal spraying metal composite coating structure sequentially comprises the following components from the surface of a steel matrix (1) of the support to the outside: thermal spraying a metal coating (2) and a paint coating (3);
wherein the surface cleanliness of the steel substrate (1) is not lower than Sa2 grade, and the roughness is 20-100 mu m; the thickness of the thermal spraying metal coating (2) is 80-200 μm; the thickness of the coating layer (3) is 40-280 μm;
the thermal spraying metal coating (2) is as follows: a zinc coating or zinc alloy coating having a thickness of 80-180 μm;
the thermal spraying metal coating (2) is as follows: a rare earth alloy coating;
the rare earth alloy coating is as follows: a rare earth aluminum alloy coating;
the rare earth aluminum alloy coating is a rare earth aluminum magnesium alloy coating or a rare earth zinc aluminum alloy coating;
the thickness of the rare earth alloy coating is 80-160 mu m;
the coating layer (3) is: a composite coating; the thickness of the composite coating is 90-280 μm, and the structure of the composite coating is formed by the following steps of: a primer sealer coat (301), a midcoat coat (302), and a weatherable topcoat coat (303);
the thickness of the primer seal coat (301) is not more than 50 mu m, the thickness of the intermediate paint coat (302) is 50-150 mu m, and the thickness of the weather-resistant finish coat (303) is 40-80 mu m;
the paint coating is a water-based paint coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022810627.7U CN214400678U (en) | 2020-11-30 | 2020-11-30 | Support with hot spraying metal composite coating structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022810627.7U CN214400678U (en) | 2020-11-30 | 2020-11-30 | Support with hot spraying metal composite coating structure |
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| Publication Number | Publication Date |
|---|---|
| CN214400678U true CN214400678U (en) | 2021-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022810627.7U Active CN214400678U (en) | 2020-11-30 | 2020-11-30 | Support with hot spraying metal composite coating structure |
Country Status (1)
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|---|---|
| CN (1) | CN214400678U (en) |
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- 2020-11-30 CN CN202022810627.7U patent/CN214400678U/en active Active
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