CN115254568A - Steel structure anticorrosion coating method and application thereof - Google Patents

Steel structure anticorrosion coating method and application thereof Download PDF

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Publication number
CN115254568A
CN115254568A CN202210385726.6A CN202210385726A CN115254568A CN 115254568 A CN115254568 A CN 115254568A CN 202210385726 A CN202210385726 A CN 202210385726A CN 115254568 A CN115254568 A CN 115254568A
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steel structure
coating process
anticorrosion
paint
coating
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CN202210385726.6A
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Inventor
胡波
李长胜
朱秀才
顾佳伟
裴方东
王刚义
吴雪忠
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Shanghai Gen Du Mstar Technology Ltd
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Shanghai Gen Du Mstar Technology Ltd
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Priority to CN202210385726.6A priority Critical patent/CN115254568A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
    • B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B05D7/57—Three layers or more the last layer being a clear coat
    • B05D7/574—Three layers or more the last layer being a clear coat at least some layers being let to dry at least partially before applying the next layer
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/02—Polyureas
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2202/00—Metallic substrate
    • B05D2202/10—Metallic substrate based on Fe
    • B05D2202/15—Stainless steel

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Paints Or Removers (AREA)

Abstract

The application discloses a steel structure anticorrosion coating method and application thereof, and relates to the technical field of combined-soda workshop anticorrosion. According to the application, the anti-corrosion treatment process of cold-coated zinc, the closed intermediate paint and the polyurea finish paint is adopted to replace the existing epoxy material or polyurethane material, the operation is simple, and brushing, roller coating and spraying can be selected according to the field condition. In addition, the polyurea material has super-strong corrosion resistance to various corrosion sources and has super-long acting time, and the problems of various corrosion sources, heavy corrosion, quick corrosion and secret corrosion of the alkali-associated workshop can be effectively solved. Furthermore, the rapid curing function of the polyurea material can greatly shorten the shutdown and production stoppage caused by anticorrosion construction, and the polyurea material is safer while recovering the loss. Therefore, the steel structure anticorrosion coating process can effectively solve the problems of short anticorrosion time effect, repeated construction, matrix damage, resource and fund waste and the like of the existing alkali-associated workshop.

Description

Steel structure anticorrosion coating method and application thereof
Technical Field
The application relates to the technical field of alkali-associated workshop corrosion prevention, in particular to a steel structure corrosion prevention coating method and application thereof.
Background
The combined alkali production workshop has corrosion sources such as amide, chloride ions, alkali solution and the like, and the cement matrix and the steel structure are corroded for a long time, so that economic loss and potential safety hazards are brought. In the prior art, epoxy materials or polyurethane and other materials are generally adopted to carry out anticorrosion treatment on the surface of a steel structure, but the materials have short anticorrosion effective period, and usually need to be subjected to anticorrosion treatment again within 1-2 years, so that direct economic loss and resource waste are brought, and substrate damage and shutdown error production of the steel structure are indirectly caused.
For example, chinese utility model patent publication No. CN205298853U discloses a high temperature, high humidity, high salt fog resistant steel pipe, wherein an epoxy zinc rich primer layer, an epoxy micaceous iron intermediate paint layer and an acrylic polyurethane finish paint layer are sequentially sprayed on the outer wall of the steel pipe main body; the thickness of the epoxy zinc-rich primer layer is 0.08-0.12 mm, the thickness of the epoxy micaceous iron intermediate paint layer is 0.1-0.2 mm, and the thickness of the acrylic polyurethane finish paint layer is 0.06-0.12 mm. According to the technical scheme, the epoxy zinc-rich primer layer, the epoxy micaceous iron intermediate paint layer and the acrylic polyurethane finish paint layer are sequentially sprayed on the surface of the steel pipe to form a matching system with excellent high-temperature, high-humidity and high-salt fog resistance, so that the steel pipe has excellent external corrosion resistance and external protective performance, the technical problem that the high-temperature, high-humidity and high-salt fog resistance of the steel pipe is low in the prior art is solved, and the high-temperature, high-humidity and high-salt fog resistance of the steel pipe is improved.
However, the anticorrosive material has single efficacy, resists strong acid and strong alkali, resists heavy salt of strong alkali, and the complex corrosion source of the alkali-associated workshop causes that the material can not completely prevent or effectively reduce the corrosion to a substrate and equipment, thereby causing the corrosion failure to be too fast and bringing great loss.
In addition, as a plurality of important equipment facilities in the alkali-connecting workshop need to be coated with an anticorrosive layer firstly and then wrapped with a heat-insulating layer, if the corrosion resistance fails, the corrosion-insulating layer is not easy to be found, and danger and great loss are easily caused.
Therefore, the existing alkali-associated workshop anticorrosion coating process needs to be shut down for a long time, which causes very adverse effects on production and operation, and the shutdown for anticorrosion treatment without shutdown causes great potential safety hazards, so improvement is urgently needed.
Disclosure of Invention
The application aims at providing a steel structure anticorrosion coating process which is mainly used for carrying out anticorrosion treatment on the surface of a steel structure in a combined alkali workshop, and is simple to operate, short in curing time and long in anticorrosion aging.
In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions: an anticorrosive coating process for a steel structure comprises the following steps:
base layer treatment: carrying out sand blasting or grinding treatment on the surface of the steel structure;
coating a primer: brushing or roller coating primer, wherein cold coating zinc is adopted as the primer;
coating intermediate paint: after the surface of the primer is dried, brushing or rolling a sealing intermediate paint;
coating finish paint: and after the surface of the closed intermediate paint is dried, coating finish paint by brushing or roller coating, wherein the finish paint is made of polyurea material.
In the technical scheme, the embodiment of the application adopts the anticorrosion treatment process of cold-coating zinc, sealing intermediate paint and polyurea finish paint to replace the existing epoxy material or polyurethane material, is simple to operate, and can be brushed, rolled and sprayed according to the field condition. In addition, the polyurea material has super-strong corrosion resistance to various corrosion sources and has super-long acting time, and the problems of various corrosion sources, heavy corrosion, quick corrosion and secret corrosion of the alkali-associated workshop can be effectively solved. Furthermore, the rapid curing function of the polyurea material can greatly shorten the shutdown and production stoppage caused by anticorrosion construction, and the polyurea material is safer while recovering the loss. Therefore, the steel structure anticorrosion coating process can effectively solve the problems of short anticorrosion time effect, repeated construction, matrix damage, resource and fund waste and the like of the existing alkali-associated workshop.
Further, according to the embodiment of the application, in the primary layer processing step, the steel structure surface is cleaned, and oil stains and residual paint are removed.
Further, according to the embodiment of the application, in the base layer processing step, the welding seam of the steel structure is polished, and the roughness is polished by adopting a cross method.
Further according to embodiments herein, wherein the primer has a film formation thickness of 70 μm.
Further, according to the embodiment of the application, the surface drying time of the primer is more than 12 hours.
Further, according to the embodiment of the application, the surface drying time of the seal intermediate paint is more than 24 hours.
Further, according to the embodiment of the present application, wherein the film thickness of the seal intermediate paint is 70 μm.
Further in accordance with an embodiment of the present application, wherein the topcoat has a film thickness of 60 μm.
Further in accordance with an embodiment of the present application, wherein the polyurea material comprises the following components:
the component A comprises: polyaspartic acid ester resin, an alkali-resistant agent, a dispersing agent, an anti-settling agent, a defoaming agent, a leveling agent and a coupling agent; and a component B: and (3) a curing agent.
Further according to the embodiment of the present application, wherein the polyaspartate resin is N, N' - (methylenebis-4, 1-cyclohexanediyl) tetraacetate.
Further in accordance with embodiments of the present application, wherein the curing agent includes polyoxypropylene glycol and 4.4-dicyclohexylmethane diisocyanate.
Further, according to the embodiments of the present application, wherein the weight part ratio between the a component and the B component is 2.
In order to achieve the purpose, the embodiment of the application also discloses application of the steel structure anticorrosive coating process, which is used for steel structure anticorrosive treatment of a combined alkali workshop.
Compared with the prior art, the method has the following beneficial effects: according to the application, the anti-corrosion treatment process of cold-coated zinc, the closed intermediate paint and the polyurea finish paint is adopted to replace the existing epoxy material or polyurethane material, the operation is simple, and brushing, roller coating and spraying can be selected according to the field condition. In addition, the polyurea material has super-strong corrosion resistance to various corrosion sources and has super-long acting time, and the problems of various corrosion sources, heavy corrosion, quick corrosion and secret corrosion of the alkali-associated workshop can be effectively solved. Furthermore, the rapid curing function of the polyurea material can greatly shorten the shutdown and production stoppage caused by anticorrosion construction, and the polyurea material is safer while recovering the loss. Therefore, the steel structure anticorrosion coating process can effectively solve the problems of short anticorrosion time effect, repeated construction, matrix damage, resource waste, fund waste and the like of the existing alkali-combined workshop.
Detailed Description
In order to make the objects and technical solutions of the present invention clear and fully described, and the advantages thereof more apparent, embodiments of the present invention are described in further detail below. It should be understood that the specific embodiments described herein are illustrative of some, but not all, embodiments of the invention and are not to be construed as limiting the scope of the invention, as those skilled in the art will recognize and appreciate that many other embodiments can be made without inventive faculty.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", etc. indicate orientations or positional relationships only for the convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
For the purposes of simplicity and explanation, the principles of the embodiments are described by referring mainly to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. It will be apparent, however, to one skilled in the art that the embodiments may be practiced without these specific details. In some instances, well-known methods and structures have not been described in detail so as not to unnecessarily obscure the embodiments. In addition, all embodiments may be used in combination with each other.
The application discloses anticorrosive coating process of steel construction mainly used carries out anticorrosive treatment to the surface of steel construction in antithetical couplet alkali workshop, easy operation, and curing time is short, and anticorrosive ageing is long. Specifically, the steel structure anticorrosion coating process comprises the following steps:
base layer treatment: carrying out sand blasting or polishing treatment on the surface of the steel structure;
coating a primer: brushing or roller coating primer, wherein the primer adopts cold coating zinc;
coating intermediate paint: after the surface of the primer is dried, brushing or rolling the sealing intermediate paint;
coating finish paint: and after the surface of the closed intermediate paint is dried, coating finish paint by brushing or roller coating, wherein the finish paint is made of polyurea material.
In the basic layer processing step, the surface of a steel structure to be coated is pretreated, organic oil removing solvent is used for removing oil on the surface of a part, then sand blasting cleaning or power tool cleaning is carried out, the cleanliness after sand blasting cleaning needs to reach the same level or above of the international standard ISO8501-1Sa2.5 level, the cleanliness after power tool cleaning needs to reach the international standard ISO8501-1St3 level, and the surface roughness (Rz) value is 50-100 mu m. In addition, if the steel structure has a welding seam, the welding seam needs to be polished to be smooth, and roughness is polished by a cross method. The arrangement is to ensure the adhesive force between the base material and the coating material and prevent the anticorrosive coating layer from falling off easily.
In the step of coating the primer, the cold-coating zinc material adopted by the primer is an industrial coating with high zinc content, and has excellent anticorrosion property. Specifically, the cold-coating zinc material contains abundant zinc powder, the content of zinc reaches 96%, the cold-coating zinc material has a very good cathode protection effect, and the cold-coating zinc material has stronger corrosion resistance than common paint by virtue of an electrochemical corrosion resistance mechanism. In addition, the high-quality zinc powder can provide excellent salt spray resistance for a paint film, so that the salt spray resistance of the cold-coated zinc coating reaches 3000 hours, the paint film is intact, and the paint film has the advantage of long-term protection. Finally, the cold-coating zinc paint is a one-component paint, does not need a curing agent, does not have the limit of gel time like two-component paints such as epoxy zinc-rich primer, inorganic zinc-rich primer and the like, and is simple and convenient to construct and coat. In the present application, the film formation thickness of the primer was 70 μm, and the surface drying time was 12 hours or longer. During coating operation, the thickness of the primer is strictly controlled, and if the thickness of the primer is too thin (less than 70 mu m), the corrosion resistance effect cannot be achieved; if the thickness of the primer is too thick (more than 70 μm), the phenomenon of paint film cracking is easily caused, and meanwhile, because the surface of the cold-coated zinc coating is of a porous structure, the excessively thick coating can cause excessive air residue, so that subsequent closed intermediate paint and finish paint generate bubbles.
In the step of coating the intermediate paint, the closed intermediate paint is a two-component material which adopts JP-1618-2 closed intermediate paint, wherein the component A 'is special epoxy resin and a high-performance closed material, the component B' is a modified curing agent, and the component A 'and the component B' are mixed according to 6-1 parts by mass. The high-performance sealing material is sericite micaceous iron and glass fiber. The sericite micaceous iron can be parallelly, directionally and overlappingly arranged after being filmed, and is similar to the lap joint structure of 'fish scales', so that the sericite micaceous iron has high sealing property and good heat resistance and corrosion resistance. In the present application, the block intermediate coat has a film thickness of 70 μm and a tack-free time of 24 hours or more.
In addition, when the intermediate paint is sprayed, a layer of 20-40 μm is sprayed in mist, and after the surface of the layer is dried, the layer is sprayed to 70 μm.
In the finish paint coating step, the film forming thickness of the finish paint is 60 mu m. The polyester material adopted by the finish paint mainly comprises the following components: the component A comprises: polyaspartic acid ester resin, an alkali-resistant agent, a dispersing agent, an anti-settling agent, a defoaming agent, a leveling agent and a coupling agent; and a component B: and (3) a curing agent. By adding a proper amount of alkali-resistant agent into the polyaspartic acid ester with high solid content and low viscosity and matching with the elastic curing agent with the same high solid content and low viscosity as the curing agent, the coating coated by the coating has high crosslinking density, good compactness, high corrosion resistance and excellent mechanical property, can completely adapt to the construction environment of an alkali-associated workshop, and meets the strict corrosion resistance requirement of the alkali-associated workshop. Meanwhile, the polyurea coating is high in curing speed, the influence of construction on production can be reduced to the maximum extent, and the economic loss is reduced.
Specifically, in the component A, the addition amount of the polyaspartic ester resin is 85-95 parts by weight, specifically N, N' - (methylenebis-4, 1-cyclohexanediyl) tetraacetate, and the polyaspartic ester resin has the characteristics of high solid content and low viscosity. The addition amount of the titanium dioxide is 5-6 parts by weight, which mainly plays a role of color, and the preferred amount is 7 parts by weight. The addition amount of the alkali-resistant agent is 5 to 9 parts by weight, preferably 2 parts by weight. The amount of the dispersant added is 0.15 to 0.45 part by weight, preferably 0.3 part by weight. The dispersant is added to effectively improve the dispersity of all the components and improve the slurry stability of the polyurea coating, thereby improving the coating quality of the polyurea coating. The addition amount of the anti-settling agent is 0.6-2.8 parts by weight, preferably 1.7 parts by weight, and the anti-settling agent has the effects of enhancing the storage stability, thickening property and thixotropy of the coating and preventing sedimentation. The added anti-settling agent can be fumed silica with small particle size, so that the anti-settling agent has the advantages of large specific surface area, strong surface adsorption, large surface energy and good dispersion property. However, other known defoaming materials may be used, and the scope of the present application is not limited. The addition amount of the defoaming agent is 0.15 to 1.5 parts by weight, preferably 0.8 part by weight, and the function is to eliminate bubbles in the production process of the coating. The added defoaming agent can be selected from modified polysiloxane, modified silicone and other known defoaming materials, and does not limit the protection scope of the application. The addition amount of the leveling agent is 0.15-0.25 weight part, preferably 0.2 weight part, and the functions of reducing the surface tension of the coating, avoiding shrinkage cavity and improving the flatness of the coating are realized. The added leveling agent can be selected from silicone resins containing silanol functional groups, or other known leveling agent materials, and does not limit the scope of the present application. The coupling agent is added in an amount of 1-10 parts by weight, preferably 4 parts by weight, and serves to enhance the adhesion of the coating to the substrate. The added coupling agent may be, for example, a siloxane coupling agent, or other known leveling agent materials, and is not intended to limit the scope of the present application.
In the component B, the addition amount of the curing agent is 46 to 61 parts by weight, preferably 53.5 parts by weight. The curing agent is an elastic curing agent with high solid content and low viscosity, and NCO% value of 5-7%, and specifically comprises polyoxypropylene diol and 4.4-dicyclohexyl methane diisocyanate, wherein the weight ratio of the polyoxypropylene diol to the 4.4-dicyclohexyl methane diisocyanate is 2.3-1. Further, the molecular weight of the polyoxypropylene diol was 2000 molecular weight.
The weight ratio of the component A to the component B is 2:1, when the component A and the component B are mixed, firstly, an electric stirrer is used for fully and uniformly stirring the component A, and then, the component B is added and stirred again for uniformly treating the component A.
Further, if solvent-resistant fluff roller is used for uniformly roller-coating and sealing the intermediate paint and the finish paint, attention needs to be paid to brushing and rolling to avoid sagging.
Further, if the dead angle, the internal corner and other areas exist, the intermediate paint and the finish paint are pre-coated and sealed by using a soft hairbrush.
Further, if the interval between every two painting processes exceeds 48 hours, the roughness must be pulled out by lightly sanding with sandpaper in a criss-cross manner.
The technical effects of the present application will be further described below by way of examples and comparative examples, but the present application is not limited to these examples.
[ example 1 ]
Base layer treatment: the method comprises the steps of pretreating the surface of a steel structure to be coated, removing grease on the surface of a part by using an organic oil removal solvent, and then carrying out sand blasting cleaning or power tool cleaning, wherein the cleaning degree after sand blasting cleaning needs to reach the same level or above level of international standard ISO8501-1Sa2.5, the cleaning degree after power tool cleaning needs to reach the international standard ISO8501-1St3, and the surface roughness (Rz) value is 50-100 mu m.
Coating a primer: and brushing or rolling a primer, wherein the primer is cold-coated zinc. The film thickness of the primer is 70 mu m, and the surface drying time is more than 12 hours.
Coating intermediate paint: after the primer is dried, the intermediate paint is brushed or rolled for sealing. The seal intermediate paint adopts JP-1618-2 seal intermediate paint. The film thickness of the sealing intermediate paint is 70 μm, and the surface drying time is more than 24 hours.
Coating finish paint: and after the surface of the closed intermediate paint is dried, coating finish paint by brushing or roller coating, wherein the finish paint is polyurea material, and the film forming thickness of the finish paint is 60 mu m. Wherein, the finish paint is prepared by the following method: a (c)
Taking 91 parts by weight of polyaspartic acid ester resin, adding 7 parts by weight of titanium dioxide, 2 parts by weight of alkali-resistant agent, 0.3 part by weight of dispersing agent, 1.7 parts by weight of anti-settling agent, 0.8 part by weight of defoaming agent, 0.2 part by weight of flatting agent and 4 parts by weight of coupling agent, and uniformly stirring to obtain a component A; 53.5 parts by weight of the curing agent is taken as a component B, and the component A and the component B are mixed to prepare the finish paint.
[ example 2 ]
This example is different from example 1 in that the amount of the polyaspartic acid ester resin added was 85 parts by weight and the amount of the curing agent added was 50.5 parts by weight.
[ example 3 ]
This example is different from example 1 in that the amount of the polyaspartic acid ester resin added was 95 parts by weight and the amount of the curing agent added was 55.5 parts by weight.
[ example 4 ] A method for producing a polycarbonate
This example is different from example 1 in that the amount of the polyaspartic acid ester resin added was 92 parts by weight and the amount of the alkali-resistant agent added was 1 part by weight.
[ example 5 ]
The present example is different from example 1 in that the amount of the polyaspartic ester resin added is 90 parts by weight and the amount of the alkali-resistant agent added is 3 parts by weight.
Comparative example 1
This comparative example is different from example 1 in that the thickness of the primer was 60 μm.
Comparative example 2
This comparative example differs from example 1 in that the primer had a thickness of 80 μm.
Comparative example 3
This comparative example differs from example 1 in that an acrylic polyurethane topcoat is used.
Comparative example 4
This comparative example is different from example 1 in that no alkali-resistant agent was added, the amount of the polyaspartic acid ester resin added was 92 parts by weight, and the amount of the curing agent added was 53 parts by weight.
The following examples and comparative examples were subjected to performance tests, and the test results are shown in table 1. The test method is as follows:
appearance: visually observing the surface of the paint film to see whether bubbles and cracks exist, wherein the bubble and crack absence is marked as 0, the bubble existence is marked as 1, and the crack existence is marked as 2.
Adhesion force: the assay was carried out using the method described in GB/T9286-1998.
Bending resistance: the detection is carried out by adopting the method described in GB/T1731-1993,
impact strength: detection was carried out by the method described in GB/T1732-1993.
Strong acid resistance: the detection is carried out by the method described in GB/T9274-1988, and the detection condition is that 5 percent of HCl solution is soaked for 240 hours;
saline-alkali resistance: the assay was carried out by the method described in GB/T9274-1988, with assay conditions of 5% NaOH solution soaking for 240h;
wear resistance: the detection is carried out by adopting the method described in GB/T1768-2006, the detection condition is 50g/500r, CS-10;
water absorption: detection was carried out by the method described in GB/T23446-2009.
TABLE 1
Figure BDA0003593592970000071
Although the illustrative embodiments of the present application have been described above to enable those skilled in the art to understand the present application, the present application is not limited to the scope of the embodiments, and various modifications within the spirit and scope of the present application defined and determined by the appended claims will be apparent to those skilled in the art from this disclosure.

Claims (13)

1. An anticorrosive coating process for a steel structure is characterized by comprising the following steps:
base layer treatment: carrying out sand blasting or grinding treatment on the surface of the steel structure;
coating a primer: brushing or roller coating a primer, wherein the primer is cold-coated zinc;
coating intermediate paint: after the surface of the primer is dried, brushing or rolling to seal the intermediate paint;
coating finish paint: and after the surface of the closed intermediate paint is dried, coating finish paint by brushing or roller coating, wherein the finish paint is made of polyurea material.
2. The anticorrosion coating process for steel structures as claimed in claim 1, wherein in the primary layer treatment step, the steel structure surface is cleaned to remove oil stains and residual paint.
3. The steel structure anticorrosion coating process according to claim 1, wherein in the base layer treatment step, the welding seam of the steel structure is polished, and the roughness is polished by a cross method.
4. The anticorrosive coating process for steel structures according to claim 1, wherein the film forming thickness of the primer is 70 μm.
5. The steel structure anticorrosion coating process of claim 1, wherein the surface drying time of the primer is more than 12 hours.
6. The anticorrosive coating process for the steel structure according to claim 1, wherein the surface drying time of the seal intermediate paint is more than 24 hours.
7. The anticorrosive coating process for steel structures according to claim 1, wherein the film thickness of the seal intermediate paint is 70 μm.
8. The steel structure anticorrosion coating process of claim 1, wherein the film thickness of the finish paint is 60 μm.
9. The anticorrosive coating process for steel structures according to claim 1, wherein the polyurea material comprises the following components:
and (2) component A: polyaspartic acid ester resin, an alkali-resistant agent, a dispersing agent, an anti-settling agent, a defoaming agent, a leveling agent and a coupling agent; and
and B component: and (3) a curing agent.
10. The anticorrosive coating process for steel structures according to claim 9, wherein the polyaspartic acid ester resin is N, N' - (methylenebis-4, 1-cyclohexanediyl) tetraaspartic acid tetraethyl ester.
11. The anticorrosion coating process for steel structures as claimed in claim 9, wherein said curing agent comprises polyoxypropylene glycol and 4, 4-dicyclohexylmethane diisocyanate.
12. The anticorrosive coating process for a steel structure according to claim 9, wherein the weight ratio of the component A to the component B is 2.
13. The application of the steel structure anticorrosion coating process as claimed in claim 1, which is used for steel structure anticorrosion treatment in an integrated alkali workshop.
CN202210385726.6A 2022-04-13 2022-04-13 Steel structure anticorrosion coating method and application thereof Pending CN115254568A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009141438A2 (en) * 2008-05-23 2009-11-26 Hempel A/S Novel fast curing ultra high solids low voc coating system for aggressive corrosive environments
EP2933355A1 (en) * 2014-04-16 2015-10-21 Ewald Dörken AG Method for producing a dark anti-corrosion coating
CN106381013A (en) * 2016-08-31 2017-02-08 湖南航天新材料技术研究院有限公司 Heavy anti-corrosion coating and application thereof
CN109554064A (en) * 2017-09-25 2019-04-02 上海梅山钢铁股份有限公司 A kind of weather-proof anti-corrosion corrosion-inhibiting coating and preparation method thereof for steel structure surface
CN212246852U (en) * 2020-05-22 2020-12-29 湖南航天三丰科工有限公司 Anti-rust coating anti-corrosion composite coating

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009141438A2 (en) * 2008-05-23 2009-11-26 Hempel A/S Novel fast curing ultra high solids low voc coating system for aggressive corrosive environments
EP2933355A1 (en) * 2014-04-16 2015-10-21 Ewald Dörken AG Method for producing a dark anti-corrosion coating
CN106381013A (en) * 2016-08-31 2017-02-08 湖南航天新材料技术研究院有限公司 Heavy anti-corrosion coating and application thereof
CN109554064A (en) * 2017-09-25 2019-04-02 上海梅山钢铁股份有限公司 A kind of weather-proof anti-corrosion corrosion-inhibiting coating and preparation method thereof for steel structure surface
CN212246852U (en) * 2020-05-22 2020-12-29 湖南航天三丰科工有限公司 Anti-rust coating anti-corrosion composite coating

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
孔振英;廉兵杰;方健君;: "聚天门冬氨酸酯聚脲涂料的研制及在海洋重防腐领域的应用研究" *
张兴;刘永胜;张余英;张南;米嘉;罗善锴;: "新型防腐涂料在藏木水电站钢闸门中的应用" *
李敏风;: "冷涂锌的涂层配套设计和无气喷漆技术" *
李敏风;: "钢结构桥梁中冷涂锌的涂装技术" *
陶群英;周虎;: "冷喷锌涂料在桥梁钢结构中的应用" *

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