CN211036060U - Thermal spraying rare earth alloy composite coating reinforcing steel bar - Google Patents
Thermal spraying rare earth alloy composite coating reinforcing steel bar Download PDFInfo
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- CN211036060U CN211036060U CN201922002801.2U CN201922002801U CN211036060U CN 211036060 U CN211036060 U CN 211036060U CN 201922002801 U CN201922002801 U CN 201922002801U CN 211036060 U CN211036060 U CN 211036060U
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Abstract
The utility model discloses a hot spraying rare earth alloy composite coating reinforcing steel bar, a reinforcing steel bar base body is coated with a hot spraying rare earth alloy composite coating structure; the thermal spraying rare earth alloy composite coating comprises a thermal spraying rare earth alloy coating, a sealing coating and a finish coating from inside to outside in sequence. This composite coating structural design is succinct, and manufacturing process is convenient, and low in product cost, the price/performance ratio is excellent, does not descend or even improve in addition with the relative adhesion strength of concrete, the utility model provides a exist of present epoxy coating reinforcing bar and zinc-aluminium cladding layer steel bar coating structure with the relative adhesion strength of concrete descend by a wide margin, reinforcing bar anchor length increases 25%, anticorrosive durability is not enough and incision, the on-the-spot common technical problem such as being difficult to repair of damaged, also solved epoxy coating reinforcing bar (containing epoxy zinc-plated reinforcing bar) simultaneously, technical problem such as anti-exposure ageing or corrosion-resistant not enough that zinc-aluminium cladding layer reinforcing bar faces because of coating structure is not good has good marketing prospect.
Description
Technical Field
The utility model relates to a reinforcing bar composite coating technique, concretely relates to hot spraying rare earth alloy composite coating reinforcing bar belongs to the application of building engineering steel and protects technical field.
Background
In order to prolong the service life of reinforced concrete engineering in severe corrosive environment and meet the design requirement of long service life of reinforced concrete structural engineering such as harbor wharfs, cross-sea bridges, tunnels, offshore oil production platforms and the like, the research of optimizing epoxy resin coating reinforcing steel bars for Bin-West Faneya bridges in 1973 is the leading research to solve the problem of reinforcing steel bar corrosion and obtain good effect, and then the epoxy resin coating reinforcing steel bar technology is widely adopted in countries and regions such as America, Japan, Europe, middle east and the like. Since the last 80 th century, after the technology is tried and put forward in China, the technology of epoxy resin coating reinforcing steel bars is popularized and put forward in China at present, and positive effects are achieved.
Epoxy resin coating reinforcing steel bar is under the factory production condition, adopts the electrostatic spraying method to spray epoxy resin powder on reinforcing steel bar surface and makes, and epoxy resin coating reinforcing steel bar must have its own defect. Firstly, the existing epoxy coating has high hardness and large brittleness, is easy to cause local damage, such as easy damage of the epoxy coating in storage, transportation, bending and construction, increases the product repair investment, influences the engineering application and construction, and causes numerous hidden dangers to the engineering anticorrosion service life, safe operation and the like; secondly, the surface of the epoxy coating is smooth, and the epoxy coating is adhered to the concrete mainly by virtue of a horizontal component force of an occlusion effect, so that the bonding strength of the coating steel bar and the concrete is greatly lower than that of a common steel bar, and the bonding strength of the coating steel bar and the concrete is reduced by 13%, therefore, the anchoring length of the epoxy coating steel bar needs to be increased by 25% compared with that of the common steel bar, and the engineering investment is increased; thirdly, the epoxy coating does not have self-repairing capability, and once the epoxy coating is damaged or invaded by a corrosive medium, the corrosion resistance of the epoxy coating is rapidly reduced, so that the service life of a building is directly influenced; fourthly, the epoxy coating has shielding insulativity, so that the epoxy coating steel bar cannot be used together with an impressed current cathodic protection system of engineering, and the performance of the protection effect of a related system is influenced; fifthly, the existing epoxy coating steel bar is found in engineering application, after the epoxy coating steel bar purchased in engineering enters a field, the surface of the epoxy coating appears discoloration and even pulverization after being placed for a few months, the bonding strength of the epoxy coating steel bar and concrete is greatly influenced, and the self corrosion protection capability of the epoxy coating steel bar is also rapidly reduced.
Aiming at the problems of epoxy coating steel bars, galvanized steel bars or zinc-aluminum alloy and other coating steel bars are introduced in the industry, the problems that the epoxy coating is easy to damage, has no self-repairing capability and cannot be used together with an impressed current cathode protection system are solved, the steel bars are popular in the market, the aluminum content in the coating of the coating steel bars is 0.05-0.5% or 4.2-6.2% (GB/T32968 zinc-aluminum alloy coating steel bars for reinforced concrete, the corrosion resistance of the steel bars in the heavy corrosion-resistant environment, particularly in the marine chloride ion environment is obviously insufficient, the industrial research and the engineering practical application show that the bonding strength of the coating steel bars and the concrete is obviously reduced and can reach 13% in the severe case, in addition, the hot dip coating process has hydrogen embrittlement potential, the practical application shows that the fatigue strength of the coating steel bars is generally reduced, cracks are gradually continued from the coating to the steel bars, the industry therefore requires that the anchoring length of galvanized steel bars must also be increased by 25%. The Chinese patent 201310150992.1 'zinc and epoxy double-coating steel bar' proposes a zinc and epoxy double-coating steel bar and a processing method thereof, wherein a zinc layer is thermally sprayed on the surface of the steel bar, an epoxy coating is electrostatically sprayed on the zinc layer, and the double-coating structure overcomes the bad problems caused by coating damage and coating omission micropores, but the double-coating structure has the problem that the relative bonding strength with concrete is greatly reduced to increase the length of an anchoring end by 25 percent as with a zinc-aluminum coating layer, an epoxy coating composite coating steel bar, an epoxy coating steel bar and the like.
In addition, the problems of insufficient corrosion resistance and durability of the coating structures of the epoxy coating steel bars and the zinc-aluminum coating steel bars are solved, the field maintenance of the notches and the damaged parts of the epoxy coating steel bars and the zinc-aluminum coating steel bars is difficult, the existing zinc-rich coating and thermal spraying maintenance schemes are difficult to be completely compatible with the original coating system, and in order to ensure the coating quality, some oversize engineering coating steel bars have to be bent and formed according to the engineering design requirements, and then epoxy resin coating or hot dipping is carried out, so that the production cost is greatly increased.
Disclosure of Invention
The utility model aims at providing a hot spraying rare earth alloy composite coating reinforcing bar, this kind of composite coating structural design is succinct, and manufacturing process is convenient, and product cost is low, the price/performance ratio is excellent, does not descend with the relative bond strength of concrete and improves even in addition, the utility model provides a present epoxy coating reinforcing bar and zinc-aluminium cladding layer steel bar coating structure anticorrosion durability not enough and incision, damaged on-the-spot a great deal of technical problem such as being difficult to repair, especially exist with concrete relative bond strength descend by a wide margin and lead to reinforcing bar anchor length to increase 25% technical problem.
The utility model discloses a realize through following technical scheme: hot spraying rare earth alloy composite coating reinforcing steel bars, wherein a hot spraying rare earth alloy composite coating structure is coated on a reinforcing steel bar substrate;
the thermal spraying rare earth alloy composite coating comprises a thermal spraying rare earth alloy coating, a sealing coating and a finish coating from inside to outside in sequence, wherein:
the surface cleanliness of the steel bar matrix is Sa2.5 grade or above, and the surface roughness Rz is 60-100 mu m;
the thickness of the thermal spraying rare earth alloy coating is 80-200 mu m;
the sealing agent for the sealing coating can permeate into the thermal spraying rare earth alloy coating, and a coating film of the sealing agent is not left on the surface of the thermal spraying rare earth alloy coating as far as possible;
the thickness of the finish coat is 30-40 μm; the finish coat is a coating structure formed by coating weather-resistant finish coat on the basis of a closed coat.
As the utility model discloses a preferred scheme of hot spraying tombarthite alloy composite coating reinforcing bar: the sealing agent used for the sealing coating is a water-based polyurethane primer.
As the utility model discloses a preferred scheme of hot spraying tombarthite alloy composite coating reinforcing bar: the weather-resistant finish paint used for the finish paint coating is water-based polyurethane finish paint.
As the utility model discloses a preferred scheme of hot spraying tombarthite alloy composite coating reinforcing bar: the thickness of the thermal spraying rare earth alloy coating is 50-100 mu m.
The preferable scheme is that the steel bar is thermally sprayed with the rare earth alloy composite coating, and the steel bar substrate is coated with a thermally sprayed rare earth alloy composite coating structure; the thermal spraying rare earth alloy composite coating is a thermal spraying rare earth alloy coating and a sealing coating from inside to outside in sequence, wherein:
the surface cleanliness of the steel bar matrix is Sa2.5 grade or above, and the surface roughness Rz is 60-100 mu m;
the thickness of the thermal spraying rare earth alloy coating is 100-180 mu m;
the sealing agent for the sealing coating can permeate into the thermal spraying rare earth alloy coating, and a coating film of the sealing agent is not left on the surface of the thermal spraying rare earth alloy coating as far as possible.
As the utility model discloses a preferred scheme of hot spraying tombarthite alloy composite coating reinforcing bar: the sealing agent used for the sealing coating is a water-based polyurethane primer.
As the utility model discloses a preferred scheme of hot spraying tombarthite alloy composite coating reinforcing bar: the thickness of the thermal spraying rare earth alloy coating is 50-100 mu m.
The preferable scheme is that the steel bar is thermally sprayed with the rare earth alloy composite coating, and the steel bar substrate is coated with a thermally sprayed rare earth alloy composite coating structure; the thermal spraying rare earth alloy composite coating is a thermal spraying rare earth alloy coating, wherein:
the surface cleanliness of the steel bar matrix is Sa2.5 grade or above, and the surface roughness Rz is 60-100 mu m;
the thickness of the thermal spraying rare earth alloy coating is 120-200 mu m.
The sealing agent of the utility model can be various priming paints and sealing agents for sealing the thermal spraying metal coating, preferably two-component and water-based polyurethane priming paints; the finish paint can be weather-resistant finish paint such as polyurethane, fluorocarbon, siloxane and the like, and preferably is double-component and aqueous polyurethane finish paint; the polyurethane primer and the polyurethane finish paint comprise systems such as polyurethane, acrylic polyurethane, saturated acrylic polyurethane and the like. The water polyurethane replaces organic solvent with water as the new polyurethane system of the disperse medium, pollution-free, safe and reliable, mechanical property is fine, compatibility is good, moisture can also passivate the internal active surface of metal coating and improve its corrosion resistance, shielding property first, the utility model discloses a more important purpose of using water polyurethane material is that the surface state of the performance water coating is compatible, absorbent advantage with the concrete slurry more easily, is favorable to guaranteeing and improving the utility model discloses reinforcing bar and concrete bonding effect; in addition above-mentioned waterborne polyurethane coating weatherability is superior to the epoxy coating by a wide margin, the utility model discloses the compound coating reinforcing bar can not cause its and concrete bonding strength to descend because of the weatherability is not enough during the sunning or the reinforcing bar component maintenance is stored on the scene.
Thermal spraying rare earth alloy coating adopt current thermal spraying technique (including ordinary thermal spraying, electric arc spraying, supersonic speed thermal spraying etc.), form with the rare earth alloy material silk spraying of prior art to the reinforcing bar surface after the cleaning process. The prior art shows that rare earth metal elements optimize the metal crystal structure in the alloy, improve the corrosion resistance of alloy structure and greatly improve the physical and mechanical properties of the alloy, for example, Chinese patent CN1718836A, rare earth cerium (Ce) accounting for 0.05-0.3% of the total weight of the wire is added into Mg and Al metal to prepare a rare earth aluminum magnesium alloy spraying corrosion-resistant wire which is used for long-acting corrosion resistance of a steel structure, especially a hydraulic engineering gate, and achieves positive protection effect; chinese patents CN101906604, CN102352475 and CN103205666, and commercially available 1060RE wire and Ac aluminum wire are all rare earth alloy wire prepared by using the excellent characteristics of rare earth metal elements.
The utility model has the advantages that: the structure of the utility model endows the steel bar with good corrosion resistance, and simultaneously, the surface state of the steel bar is obviously improved, when the concrete is poured, the concrete slurry can penetrate into the thermal spraying rare earth alloy composite coating and even reach the steel bar basal body part; the surfaces of the waterborne polyurethane primer and the waterborne polyurethane finish paint are compatible with the characteristics of concrete slurry, so that mutual adhesion is ensured; therefore, the concrete is tightly and firmly combined with the thermal sprayed rare earth alloy composite coating reinforcing steel bar after being gelled, the relative bonding strength of the thermal sprayed rare earth alloy composite coating reinforcing steel bar and the concrete generally reaches over 100 percent, and the relative bonding strength is not obviously reduced after a corrosion resistance test, and the engineering application of the thermal sprayed rare earth alloy composite coating reinforcing steel bar does not need to increase the length of a reinforcing steel bar anchoring end by 25 percent.
The utility model discloses the production site of reinforcing bar, engineering are used on-the-spot all can conveniently adopt hot spraying frock to carry out hot spraying repair operation to damage position etc. in incision, welding point, mechanical connection position, the transportation course of working, guarantee that repair department and original hot spraying coating combine together, have solved the engineering hidden danger that the on-the-spot repair technology difference of current reinforcing bar product caused completely.
The utility model discloses a hot spraying + seals or + finish paint or + seal + series protective structure design of finish paint, have good resistant time durability, there is not epoxy coating reinforcing bar surface discolour the light-loss ageing problem in the field of the building site, also there is not galvanized steel bar surface oxidation problem, through control seal coat, finish paint coating thickness design, guarantee metal coating roughness and still can maintain good bonding ability with the concrete, its adhesive strength is still a little higher than untreated reinforcing bar parent metal, more obviously be superior to the epoxy coating reinforcing bar after ageing of the same kind, zinc-aluminium cladding layer steel structure system.
Drawings
FIG. 1 is a schematic structural view of a steel bar with a rare earth alloy thermal sprayed composite coating according to examples 1-2;
FIG. 2 is a schematic structural view of a steel bar with a thermal sprayed rare earth alloy composite coating of example 3;
FIG. 3 is a schematic structural view of a steel bar with a thermal sprayed rare earth alloy composite coating of example 4;
in the figure, 1-a steel bar substrate, 2-a thermal spraying rare earth alloy coating, 3-a sealing coating and 4-a finish coating.
The specific implementation mode is as follows:
the invention is further described with reference to the following figures and examples.
Example 1
As shown in figure 1 of the drawings,
the steel bar is coated with the rare earth alloy composite coating by thermal spraying, and the steel bar substrate 1 is coated with the rare earth alloy composite coating by thermal spraying;
the thermal spraying rare earth alloy composite coating comprises a thermal spraying rare earth alloy coating layer 2, a sealing coating layer 3 and a finish coating layer 4 from inside to outside in sequence, wherein:
the surface cleanliness of the steel bar matrix 1 reaches Sa2.5 grade after shot blasting treatment, and the surface roughness Rz is 60-80 μm;
the thickness of the thermal spraying rare earth alloy coating 2 is 50-100 mu m, and the thermal spraying rare earth alloy coating is prepared by adopting an electric arc spraying technology and spraying 1060RE rare earth aluminum wires produced by Changxing county Huafeng spray welding material electric furnace limited company;
the thickness of the sealing coating 3 is not counted, a proper amount of two-component aqueous polyurethane primer produced by Tianjin outskirts chemical coating Co., Ltd is coated on the thermal spraying rare earth alloy coating 2, the polyurethane primer is ensured to be completely penetrated into the thermal spraying rare earth alloy coating 2 to form the sealing coating 3, and no much residual polyurethane primer exists on the surface of the thermal spraying rare earth alloy coating 2;
the dosage of the seal primer is selected to be 60-90% of the dosage of the seal primer in normal seal, and the specific method comprises the following steps: firstly, carrying out a plot experiment, selecting a thermal spraying rare earth alloy coating with the same thickness of 1-2m2Sealing coating is carried out according to the conventional sealing requirement, and the dosage M of the sealing primer on unit area is calculated0In this applicationWhen the novel embodiment is carried out, according to M0The consumption of 60 percent to 90 percent is used for the sealing operation of the thermal spraying rare earth alloy coating 2.
The thickness of the finish coat 4 is 30-40 μm, and after the surface of the seal coat 3 is dried, a proper amount of aqueous two-component polyurethane finish produced by Wuxi Dongzhong Zidun science and technology Limited is brushed on the seal coat to form the polyurethane finish coat 4.
And (3) processing the cuts and damage points such as fixed-length cutting, collision damage and the like of the composite coating reinforcing steel bars, and repairing by adopting the composite coating structural system and the preparation method.
And after the coating 4 is dried, the steel bar product can be packaged, stored or transported and used.
Example 1 the main performance data of the thermally sprayed rare earth metal composite coated steel bar is shown in table 1.
Example 2
As shown in figure 1 of the drawings,
the steel bar is coated with the rare earth alloy composite coating by thermal spraying, and the steel bar substrate 1 is coated with the rare earth alloy composite coating by thermal spraying;
the thermal spraying rare earth alloy composite coating comprises a thermal spraying rare earth alloy coating layer 2, a sealing coating layer 3 and a finish coating layer 4 from inside to outside in sequence, wherein:
the surface cleanliness of the steel bar matrix 1 reaches Sa2.5 grade after shot blasting treatment, and the surface roughness Rz is 60-100 mu m;
the thickness of the thermal spraying rare earth alloy coating 2 is 80-160 mu m, and the thermal spraying rare earth alloy coating is prepared by adopting a supersonic electric arc technology and spraying rare earth aluminum magnesium alloy wires produced by Changxing county Huafeng spray welding material electric furnace limited company;
the thickness of the closed coating 3 is not counted, the thickness of the finish coating 4 is 30-40 microns, a proper amount of water-based double-component polyurethane finish paint produced by Wuxi Dongzongjianzhen scientific and technological Limited is firstly brushed on the thermal spraying rare earth alloy coating 2, the polyurethane finish paint is ensured to be completely infiltrated into the thermal spraying rare earth alloy coating 2 to form the polyurethane finish closed coating 3, and no too much residual polyurethane finish paint exists above the surface of the thermal spraying rare earth alloy coating 2 (the dosage is selected and controlled by the method shown in the embodiment 1); and then after the surface of the polyurethane finish closed coating 3 is dried, brushing a proper amount of aqueous double-component polyurethane finish produced by Wuxi Dongzhen Zidun science and technology Limited to form a polyurethane finish coating 4 with the thickness of 30-40 mu m.
The composite coating steel bar is processed by cutting to a fixed length, collision damage and other cuts and damage points, and the repair is still completed by adopting the composite coating structural system and the preparation method.
And after the coating 4 is dried, the steel bar product can be packaged, stored or transported and used.
The finish paint coating can be finished by two steps according to the embodiment 2, and can also be finished by one step of coating on the premise of strictly controlling the coating process to ensure the coating quality, so that the effect is further improved, and the processing cost is reduced.
Example 2 the main performance data of the thermal sprayed rare earth alloy composite coated steel bar is shown in table 1.
Example 3
As shown in figure 2 of the drawings,
the steel bar is coated with the rare earth alloy composite coating by thermal spraying, and the steel bar substrate 1 is coated with the rare earth alloy composite coating by thermal spraying;
the thermal spraying rare earth alloy composite coating is a thermal spraying rare earth alloy coating layer 2 and a sealing coating layer 3 from inside to outside in sequence, wherein:
the surface cleanliness of the steel bar matrix 1 reaches Sa2.5 grade after shot blasting treatment, and the surface roughness Rz is 60-100 mu m;
the thickness of the thermal spraying rare earth alloy coating 2 is 100-180 mu m, and the coating is prepared by spraying Ac rare earth aluminum wire sold by Happy county Huafeng spray welding material electric furnace limited by adopting a flame spraying technology;
the thickness of the seal coating 3 is not counted, a proper amount of two-component aqueous polyurethane primer produced by Tianjin outskirts chemical coating Co., Ltd is coated on the thermal spraying rare earth alloy coating 2, the polyurethane primer is ensured to be completely penetrated into the thermal spraying rare earth alloy coating 2, and no too much residual polyurethane primer exists on the surface of the thermal spraying rare earth alloy coating 2;
and (3) processing the cuts and damage points such as fixed-length cutting, collision damage and the like of the composite coating reinforcing steel bars, and repairing by adopting the composite coating structural system and the preparation method.
And after the coating 3 is dried, the steel bar product can be packaged, stored or transported and used.
Example 3 the main performance data of the thermal sprayed rare earth alloy composite coated steel bar is shown in table 1.
Example 4
As shown in fig. 3, the steel bar substrate 1 is coated with the thermal sprayed rare earth alloy composite coating structure by thermal spraying the rare earth alloy composite coating steel bar;
the thermal spraying rare earth alloy composite coating is a thermal spraying rare earth alloy coating 2, wherein:
the surface cleanliness of the steel bar matrix 1 reaches Sa2.5 grade after shot blasting treatment, and the surface roughness Rz is 60-100 mu m;
the thickness of the thermal spraying rare earth alloy coating 2 is 120-200 mu m, and the thermal spraying rare earth alloy coating is prepared by spraying rare earth aluminum magnesium alloy wires produced by Changxing county Huafeng spray welding material electric furnace limited company by adopting an electric arc spraying technology;
and (3) processing the cuts and damage points such as fixed-length cutting, collision damage and the like of the composite coating reinforcing steel bars, and repairing by adopting the composite coating structural system and the preparation method.
After the thermal spraying of the composite coating is finished, the steel bar product can be packaged, stored or transported and used.
Example 4 the main performance data of the thermal sprayed rare earth alloy composite coated steel bar is shown in table 1.
The measurement data in table 1 show that the thermal spraying rare earth alloy composite coating reinforcing steel bar of the utility model has good bonding strength with concrete, and the relative bonding strength is not obviously reduced; after the artificial accelerated aging-salt spray test, the relative bonding strength of the zinc-aluminum alloy coating reinforcing steel bar and the concrete is obviously reduced and is lower than 85 percent of qualified line, and the product and the epoxy coating reinforcing steel bar have small change; after the artificial accelerated aging-xenon lamp test, the relative bonding strength of the epoxy coating steel bar and the concrete is obviously reduced and is lower than 85 percent of qualified line, the structural product and the zinc-aluminum alloy coating steel bar of the utility model have little change; aging testing data shows, the utility model discloses epoxy coating reinforcing bar, zinc-aluminium alloy cladding material reinforcing bar have been solved to the structure product and have been stored, the problem that the transfer, engineering application in-process leads to seriously descending with concrete bond strength because of corrosion-resistant, anti insolate ability is not enough.
Experimental and detection data show, the utility model discloses structural reinforcement anchor end can not increase 25% length, and bar anchor and relevant reinforced concrete structure mechanical properties reach the same performance requirement of parent metal reinforcing bar of the same kind, safe and reliable.
TABLE 1 data of main performance test of hot sprayed RE alloy composite coated steel bar
Remarking: the comparative sample 1 is a hot sprayed rare earth alloy composite coating reinforcing steel bar and uses a base metal reinforcing steel bar with the same specification and furnace number, the steel bar meets the national steel standard of relative reinforced concrete engineering, and the surface of the steel bar is only subjected to simple ash removal cleaning treatment;
the comparison sample 2 is an epoxy coating steel bar prepared by a base material steel bar matrix with the same specification, and meets the requirements of JG/T502-2016 epoxy resin coating steel bar;
the comparison sample 3 is a zinc-aluminum alloy coating reinforcing steel bar prepared by a base material reinforcing steel bar matrix with the same specification, and meets the requirements of GB/T32968-2016 (Zinc-aluminum alloy coating reinforcing steel bar for reinforced concrete), wherein the Al content is 5 percent;
the comparative sample 4 is a galvanized epoxy coating steel bar prepared by a base material steel bar matrix with the same specification, and meets the requirements of JG/T502-2016 epoxy resin coating steel bar.
Claims (8)
1. The hot spraying rare earth alloy composite coating reinforcing steel bar is characterized in that: the steel bar matrix (1) is coated with a thermal spraying rare earth alloy composite coating structure; the thermal spraying rare earth alloy composite coating is a thermal spraying rare earth alloy coating (2), a sealing coating (3) and a finish coating (4) from inside to outside in sequence, wherein:
the surface cleanliness of the steel bar matrix (1) is Sa2.5 grade or above, and the surface roughness Rz is 60-100 mu m;
the thickness of the thermal spraying rare earth alloy coating (2) is 80-200 mu m;
the sealing agent for the sealing coating (3) can permeate into the thermal spraying rare earth alloy coating (2), and a coating film of the sealing agent is not left above the surface of the thermal spraying rare earth alloy coating (2) as far as possible;
the thickness of the finish coat (4) is 30-40 μm; the finish coat (4) is a coating structure formed by coating weather-resistant finish on the basis of the seal coat (3).
2. The thermally sprayed rare earth alloy composite coated steel bar according to claim 1, wherein:
the sealing agent used for the sealing coating (3) is a water-based polyurethane primer.
3. The thermally sprayed rare earth alloy composite coated steel bar according to claim 1, wherein:
the weather-resistant finish paint used for the finish paint coating (4) is a waterborne polyurethane finish paint.
4. The thermally sprayed rare earth alloy composite coated steel bar according to claim 1, wherein: the thickness of the thermal spraying rare earth alloy coating (2) is 50-100 mu m.
5. The hot spraying rare earth alloy composite coating reinforcing steel bar is characterized in that: the steel bar matrix (1) is coated with a thermal spraying rare earth alloy composite coating structure; the thermal spraying rare earth alloy composite coating is a thermal spraying rare earth alloy coating (2) and a sealing coating (3) from inside to outside in sequence, wherein:
the surface cleanliness of the steel bar matrix (1) is Sa2.5 grade or above, and the surface roughness Rz is 60-100 mu m;
the thickness of the thermal spraying rare earth alloy coating (2) is 100-180 mu m;
the sealing agent for the sealing coating (3) can permeate into the thermal spraying rare earth alloy coating (2), and a coating film of the sealing agent is not left on the surface of the thermal spraying rare earth alloy coating (2) as far as possible.
6. The thermally sprayed rare earth alloy composite coated steel bar according to claim 5, wherein: the sealing agent used for the sealing coating (3) is a water-based polyurethane primer.
7. The thermally sprayed rare earth alloy composite coated steel bar according to claim 5, wherein: the thickness of the thermal spraying rare earth alloy coating (2) is 50-100 mu m.
8. The hot spraying rare earth alloy composite coating reinforcing steel bar is characterized in that: the steel bar matrix (1) is coated with a thermal spraying rare earth alloy composite coating structure; the thermal spraying rare earth alloy composite coating is a thermal spraying rare earth alloy coating (2), wherein:
the surface cleanliness of the steel bar matrix (1) is Sa2.5 grade or above, and the surface roughness Rz is 60-100 mu m;
the thickness of the thermal spraying rare earth alloy coating (2) is 120-200 mu m.
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| CN112547464A (en) * | 2020-11-30 | 2021-03-26 | 江苏卓奇新材料科技有限公司 | Support with thermal spraying metal composite coating |
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| CN112547464A (en) * | 2020-11-30 | 2021-03-26 | 江苏卓奇新材料科技有限公司 | Support with thermal spraying metal composite coating |
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Denomination of utility model: RE alloy composite coating steel bar by thermal spraying Effective date of registration: 20210226 Granted publication date: 20200717 Pledgee: Bank of China Limited by Share Ltd. Xuzhou Copper Mt branch Pledgor: JIANGSU ZHUOQI NEW MATERIAL TECHNOLOGY Co.,Ltd. Registration number: Y2021320000021 |