CN114570629A - Construction method of water-based heavy-duty anticorrosive fluorocarbon coating - Google Patents
Construction method of water-based heavy-duty anticorrosive fluorocarbon coating Download PDFInfo
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- CN114570629A CN114570629A CN202210201257.8A CN202210201257A CN114570629A CN 114570629 A CN114570629 A CN 114570629A CN 202210201257 A CN202210201257 A CN 202210201257A CN 114570629 A CN114570629 A CN 114570629A
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- 238000000576 coating method Methods 0.000 title claims abstract description 88
- 239000011248 coating agent Substances 0.000 title claims abstract description 87
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000010276 construction Methods 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 42
- 239000010959 steel Substances 0.000 claims abstract description 42
- 238000005507 spraying Methods 0.000 claims abstract description 39
- 239000003973 paint Substances 0.000 claims abstract description 37
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000004593 Epoxy Substances 0.000 claims abstract description 19
- 238000004140 cleaning Methods 0.000 claims abstract description 17
- 238000004381 surface treatment Methods 0.000 claims abstract description 15
- 230000007547 defect Effects 0.000 claims abstract description 14
- 238000005498 polishing Methods 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000003746 surface roughness Effects 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 230000008439 repair process Effects 0.000 claims abstract description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 41
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 13
- 239000004408 titanium dioxide Substances 0.000 claims description 13
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- 239000006071 cream Substances 0.000 claims description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 10
- 239000011707 mineral Substances 0.000 claims description 10
- 239000013527 degreasing agent Substances 0.000 claims description 9
- 238000005237 degreasing agent Methods 0.000 claims description 9
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 5
- 230000003749 cleanliness Effects 0.000 claims description 5
- 238000005488 sandblasting Methods 0.000 claims description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000007790 scraping Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 14
- 230000007797 corrosion Effects 0.000 abstract description 12
- 238000005536 corrosion prevention Methods 0.000 abstract description 4
- 238000011109 contamination Methods 0.000 abstract description 2
- 239000002253 acid Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000002585 base Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- -1 enamel Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
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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
- B05D3/002—Pretreatement
-
- 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
- B05D3/007—After-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
- B05D7/24—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 for applying particular liquids or other fluent materials
-
- 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
- B05D7/58—No clear coat specified
- B05D7/584—No clear coat specified at least some layers being let to dry, at least partially, before applying the next layer
-
- 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
-
- 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
- B05D2504/00—Epoxy polymers
-
- 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
- B05D2506/00—Halogenated polymers
- B05D2506/10—Fluorinated polymers
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention relates to the technical field of steel structure corrosion prevention, and particularly discloses a construction method of a water-based heavy-duty fluorocarbon coating, which comprises the following steps: s1, carrying out surface treatment on the steel structure coating area, wherein the surface treatment comprises cleaning of surface oil contamination impurities and defect repair; s2, polishing the area subjected to the surface treatment in the step S1 to enable the surface roughness of the area to meet the construction requirement of the coating; s3, spraying fireproof paint on the area polished in the step S2, flattening in the spraying process, and polishing after the paint is dried; s4, spraying a modified epoxy antirust primer on the fireproof coating in the step S3, forming an antirust layer on the surface of the fireproof coating, and polishing after the primer is dried; s5, repeating the step S4, and forming 2-3 anti-rust layers; s6, coating finish paint on the anti-rust layer processed in the step S5, wherein the finish paint is water-based heavy-duty fluorocarbon paint, and finally drying to finish construction; the coating provided by the invention has good corrosion resistance.
Description
Technical Field
The invention relates to the technical field of steel structure corrosion prevention, in particular to a construction method of a water-based heavy-duty fluorocarbon coating.
Background
The steel structure is a structure formed by steel materials, is one of main building structure types, has the advantages of good plasticity and toughness, high strength, good anti-seismic performance, short construction period, convenient manufacture and the like, and is widely applied to the fields of high-rise structures, large-span structures, industrial plants and the like. The corrosion of the steel structure can be divided into atmospheric corrosion, soil corrosion and marine corrosion according to factors such as the surrounding atmospheric environment, soil environment and marine environment; the corrosion pattern can be classified into crevice corrosion and local corrosion.
The existing steel structure corrosion prevention method mainly comprises the following steps: 1. adopting weathering resistant steel; 2. spraying zinc or aluminum on the steel member; 3. painting, spraying paint, enamel, plastic, etc. on the surface of steel structure to cover the metal-dipped surface of steel structure. The painting spraying mode is the most common, but the existing paint coating has the defects of uneven spraying effect, short corrosion prevention time in use, possibility of falling off, poor adsorption effect, existence of gaps between the coating and a metal substrate, corrosion generation and influence on the service life of a product.
Disclosure of Invention
The invention aims to provide a construction method of a water-based heavy-duty anticorrosive fluorocarbon coating, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a construction method of a water-based heavy-duty anticorrosive fluorocarbon coating comprises the following steps:
s1, carrying out surface treatment on the steel structure coating area, wherein the surface treatment comprises cleaning of surface oil contamination impurities and defect repair;
s2, polishing the area subjected to the surface treatment in the step S1 to enable the surface roughness of the area to meet the construction requirement of the coating;
s3, spraying fireproof paint on the area polished in the step S2, flattening in the spraying process, and polishing after the paint is dried;
s4, spraying a modified epoxy antirust primer on the fireproof coating in the step S3, forming an antirust layer on the surface of the fireproof coating, and polishing after the primer is dried;
s5, repeating the step S4, and forming 2-3 anti-rust layers;
and S6, coating finish paint on the anti-rust layer processed in the step S5, wherein the finish paint is water-based heavy-duty fluorocarbon paint, and finally drying to finish construction.
As a preferable technical scheme of the present invention, in step S1, the oil stain on the surface of the steel structure is cleaned by the alkaline degreasing agent, and a rust remover is used to clean the rusted area on the surface of the steel structure, so as to scrape the rusted area on the surface; and coating the defects generated in the rusted area with the anticorrosive mineral cream to completely fill the defect parts with the anticorrosive mineral cream.
As a preferred technical scheme of the invention, the alkaline degreasing agent comprises sodium carbonate and sodium hydroxide which are mixed, the alkaline degreasing agent is sprayed on the surface of a steel structure, and the steel structure is kept stand for 8-10 min for cleaning; the rust remover is formed by mixing acetic acid, glycol and triethanolamine, is sprayed on the surface of a steel structure, and is kept stand for 4-6 min for cleaning.
In a preferred technical scheme of the present invention, in step S2, the steel structure surface is subjected to sand blasting, the surface cleanliness is treated to metal white, the rust removal grade reaches the standard of sa2.5, and the surface roughness does not exceed 70 μm.
As a preferable technical solution of the present invention, in the step S3, the fireproof paint is sprayed to a thickness of 1mm to 2 mm.
In a preferred embodiment of the present invention, in step S4, the spray thickness of the modified epoxy anti-corrosive primer is 0.5mm to 0.8mm, and the modified epoxy anti-corrosive primer is naturally dried at room temperature after the spray coating, and the ambient humidity is less than 85%.
As a preferable technical solution of the present invention, in the step S5, the spraying thickness of the next modified epoxy anti-corrosive primer is 1.2 to 1.5 times of the spraying thickness of the last modified epoxy anti-corrosive primer, and the thicknesses are sequentially increased.
In the step S6, the coating thickness of the aqueous heavy-duty fluorocarbon coating is 0.8mm to 1.2mm, the drying temperature is 60 ℃ to 80 ℃, and finally the dried coating is sanded with 500# to 600# sandpaper.
As a preferable technical scheme, the waterborne heavy-duty anticorrosive fluorocarbon coating is doped with rutile titanium dioxide, and the weight ratio of the rutile titanium dioxide to the coating is 1: 12 to 18, and the granularity of the rutile type titanium dioxide is 800 meshes to 1200 meshes.
Compared with the prior art, the invention has the beneficial effects that: the construction method provided by the invention has the advantages that the working procedures are simple and easy to operate, and the coating obtained by the construction method has good corrosion resistance and fire resistance, and can effectively protect an internal steel structure; and the coating has good adhesion with a steel structure, has strong external interference resistance, and can not fall off after long-time use.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows: a construction method of a water-based heavy-duty anticorrosive fluorocarbon coating comprises the following steps:
s1, performing surface treatment on the coated area of the steel structure, coating oil stains on the surface of the steel structure by using an alkaline degreasing agent formed by mixing sodium carbonate and sodium hydroxide, and standing for 9min for cleaning; cleaning the rusted area on the surface of the steel structure by using a rust remover formed by mixing acetic acid, ethylene glycol and triethanolamine, spraying the rust remover on the surface of the steel structure, standing for 5min for cleaning, and scraping the rusted area on the surface; and coating the defects generated in the rusted area with the anticorrosive mineral cream to completely fill the defect parts with the anticorrosive mineral cream.
S2, carrying out sand blasting treatment on the surface of the regional steel structure after the surface treatment in the step S1, wherein the surface cleanliness is treated to be metal white, the rust removal grade reaches the standard Sa2.5, and the surface roughness is 65 mu m;
s3, spraying fireproof paint on the area polished in the step S2, flattening in the spraying process, drying the paint, and polishing, wherein the spraying thickness of the fireproof paint is 1.4-1.6 mm;
s4, spraying modified epoxy antirust primer on the fireproof coating obtained in the step S3 to form an antirust layer on the surface of the fireproof coating, wherein the thickness of the antirust layer is 0.6-0.7 mm, and the antirust layer is naturally air-dried at room temperature after being sprayed, and the environment humidity is 80%;
s5, repeating the step S4, and forming 3 anti-rust layers, wherein the spraying thickness of the second layer of modified epoxy anti-rust primer is 0.78-0.97 mm, and the spraying thickness of the third layer of modified epoxy anti-rust primer is 1.2-1.3 mm;
s6, coating a finish on the anti-rust layer processed in the step S5, wherein the finish is a water-based heavy-duty fluorocarbon coating, the coating thickness of the water-based heavy-duty fluorocarbon coating is 1mm, the drying temperature is 70 ℃, and finally, the dried coating is sanded by 550# abrasive paper; rutile type titanium dioxide is doped in the aqueous heavy-duty fluorocarbon coating, and the weight ratio of the rutile type titanium dioxide to the coating is 1: 16, the granularity of the rutile type titanium dioxide is 1000 meshes.
Example two: a construction method of a water-based heavy-duty anticorrosive fluorocarbon coating comprises the following steps:
s1, performing surface treatment on the coated area of the steel structure, coating oil stains on the surface of the steel structure by using an alkaline degreasing agent formed by mixing sodium carbonate and sodium hydroxide, and standing for 10min for cleaning; cleaning the rusted area on the surface of the steel structure by using a rust remover formed by mixing acetic acid, ethylene glycol and triethanolamine, spraying the rust remover on the surface of the steel structure, standing for 6min for cleaning, and scraping the rusted area on the surface; and coating the defects generated in the rusted area with the anticorrosive mineral cream to completely fill the defect parts with the anticorrosive mineral cream.
S2, performing sand blasting treatment on the surface of the steel structure of the area subjected to the surface treatment in the step S1, wherein the surface is subjected to surface cleanliness treatment until the surface is white, the rust removal grade reaches the standard Sa2.5, and the surface roughness is 70 microns;
s3, spraying fireproof paint on the area polished in the step S2, flattening in the spraying process, drying the paint, and polishing, wherein the spraying thickness of the fireproof paint is 2 mm;
s4, spraying a modified epoxy antirust primer on the fireproof coating in the step S3 to form an antirust layer on the surface of the fireproof coating, wherein the thickness of the antirust layer is 0.7-0.8 mm, and the antirust layer is naturally air-dried at room temperature after being sprayed, and the environment humidity is 85%;
s5, repeating the step S4, and forming 2 layers of anti-rust layers, wherein the spraying thickness of the second layer of modified epoxy anti-rust primer is 0.9-1.1 mm;
s6, coating finish paint on the anti-rust layer processed in the step S5, wherein the finish paint is water-based heavy-duty fluorocarbon paint, the coating thickness of the water-based heavy-duty fluorocarbon paint is 1.2mm, the drying temperature is 80 ℃, and finally, sanding is carried out on the dried coating by using No. 600 abrasive paper; rutile type titanium dioxide is doped in the waterborne heavy-duty anticorrosive fluorocarbon coating, and the weight ratio of the rutile type titanium dioxide to the coating is 1: 18, the granularity of the rutile type titanium dioxide is 1100 meshes.
Example three: a construction method of a water-based heavy-duty anticorrosive fluorocarbon coating comprises the following steps:
s1, performing surface treatment on the coated area of the steel structure, coating the oil stain on the surface of the steel structure by using an alkaline degreasing agent formed by mixing sodium carbonate and sodium hydroxide, and standing for 8min for cleaning; cleaning the rusted area on the surface of the steel structure by using a rust remover formed by mixing acetic acid, ethylene glycol and triethanolamine, spraying the rust remover on the surface of the steel structure, standing for 4min for cleaning, and scraping the rusted area on the surface; and coating the defects generated in the rusted area with the anticorrosive mineral cream to completely fill the defect parts with the anticorrosive mineral cream.
S2, performing sand blasting treatment on the surface of the steel structure of the area subjected to the surface treatment in the step S1, wherein the surface is subjected to surface cleanliness treatment until the surface is white, the rust removal grade reaches the standard Sa2.5, and the surface roughness is 60 mu m;
s3, spraying fireproof paint on the area polished in the step S2, flattening in the spraying process, drying the paint, and polishing, wherein the spraying thickness of the fireproof paint is 1 mm;
s4, spraying a modified epoxy antirust primer on the fireproof coating in the step S3 to form an antirust layer on the surface of the fireproof coating, wherein the thickness of the antirust layer is 0.5mm, and the antirust layer is naturally air-dried at room temperature after being sprayed, and the environment humidity is 70%;
s5, repeating the step S4, and forming 3 layers of anti-rust layers; the spraying thickness of the second layer of modified epoxy anti-rust primer is 0.6-0.75 mm, and the spraying thickness of the third layer of modified epoxy anti-rust primer is 0.84-1 mm;
s6, coating finish paint on the anti-rust layer processed in the step S5, wherein the finish paint is water-based heavy-duty fluorocarbon paint, the coating thickness of the water-based heavy-duty fluorocarbon paint is 0.8mm, the drying temperature is 60 ℃, and finally, sanding is carried out on the dried coating by using 500# abrasive paper; rutile type titanium dioxide is doped in the aqueous heavy-duty fluorocarbon coating, and the weight ratio of the rutile type titanium dioxide to the coating is 1: 14, the granularity of the rutile type titanium dioxide is 800 meshes.
The coatings prepared according to the first, second and third examples were tested by using a common water-based anticorrosive paint coating as a control group, and the test results are shown in the following table:
as shown in the table, the coating prepared by the invention has good corrosion resistance when tested in acid, alkali and salt solutions with different concentrations, and the coating has a stable structure and does not fall off; compared with the traditional water-based anti-corrosion coating, the coating has good anti-corrosion performance under the states of weak base, weak acid and weak salt, but the coating falls off along with the increase of the concentrations of the acid, the base and the salt, and the separation phenomenon is more and more serious along with the time.
In conclusion, the aqueous heavy-duty anticorrosive fluorocarbon coating provided by the invention has the characteristics of good weather resistance, good corrosion resistance, high adhesive force and good stability; meanwhile, the coating has good adhesion with a steel structure, has strong external interference resistance and can not fall off after being used for a long time.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The construction method of the water-based heavy-duty anticorrosive fluorocarbon coating is characterized by comprising the following steps of:
s1, performing surface treatment on the steel structure coating area, wherein the surface treatment comprises cleaning of surface oil stains and impurities and defect repair;
s2, polishing the area subjected to the surface treatment in the step S1 to enable the surface roughness of the area to meet the construction requirement of the coating;
s3, spraying fireproof paint on the area polished in the step S2, flattening in the spraying process, and polishing after the paint is dried;
s4, spraying a modified epoxy antirust primer on the fireproof coating in the step S3, forming an antirust layer on the surface of the fireproof coating, and polishing after the primer is dried;
s5, repeating the step S4, and forming 2-3 antirust layers;
and S6, coating finish paint on the anti-rust layer processed in the step S5, wherein the finish paint is water-based heavy-duty fluorocarbon paint, and finally drying to finish construction.
2. The construction method of the aqueous heavy-duty fluorocarbon coating according to claim 1, characterized in that: in the step S1, oil stains on the surface of the steel structure are cleaned by the alkaline degreasing agent, and a rust remover is used for cleaning the rusted area on the surface of the steel structure and scraping the rusted area on the surface; and coating the defects generated in the rusted area with the anticorrosive mineral cream to completely fill the defect parts with the anticorrosive mineral cream.
3. The construction method of the aqueous heavy-duty fluorocarbon coating according to claim 2, characterized in that: the alkaline degreasing agent comprises sodium carbonate and sodium hydroxide which are mixed, the alkaline degreasing agent is sprayed on the surface of the steel structure and stands for 8-10 min for cleaning; the rust remover is formed by mixing acetic acid, glycol and triethanolamine, is sprayed on the surface of a steel structure, and is kept stand for 4-6 min for cleaning.
4. The construction method of water-based heavy-duty fluorocarbon coating according to claim 1, characterized in that: and in the step S2, performing sand blasting treatment on the surface of the steel structure, wherein the cleanliness of the surface is treated to be metal white, the derusting grade reaches the standard Sa2.5, and the surface roughness does not exceed 70 mu m.
5. The construction method of the aqueous heavy-duty fluorocarbon coating according to claim 1, characterized in that: in the step S3, the spraying thickness of the fireproof paint is 1 mm-2 mm.
6. The construction method of the aqueous heavy-duty fluorocarbon coating according to claim 1, characterized in that: in the step S4, the spray thickness of the modified epoxy anti-corrosive primer is 0.5mm to 0.8mm, and the spray-coated epoxy anti-corrosive primer is naturally air-dried at room temperature, and the ambient humidity is less than 85%.
7. The construction method of the aqueous heavy-duty fluorocarbon coating according to claim 1, characterized in that: in the step S5, the spraying thickness of the next modified epoxy anti-corrosive primer is 1.2 to 1.5 times of the spraying thickness of the last modified epoxy anti-corrosive primer, and the thicknesses are sequentially increased.
8. The construction method of the aqueous heavy-duty fluorocarbon coating according to claim 1, characterized in that: in the step S6, the coating thickness of the water-based heavy-duty anticorrosive fluorocarbon coating is 0.8-1.2 mm, the drying temperature is 60-80 ℃, and finally the dried coating is sanded by 500-600 # abrasive paper.
9. The construction method of the aqueous heavy-duty fluorocarbon coating according to claim 1, characterized in that: rutile type titanium dioxide is doped in the aqueous heavy-duty anticorrosive fluorocarbon coating, and the weight ratio of the rutile type titanium dioxide to the coating is 1: 12 to 18, and the granularity of the rutile type titanium dioxide is 800 meshes to 1200 meshes.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107386550A (en) * | 2017-06-09 | 2017-11-24 | 斓图涂装工程（上海）有限公司 | A kind of steel construction exposed parts fire prevention, the construction method of anti-corrosion wood grain coating |
| CN112024340A (en) * | 2020-04-27 | 2020-12-04 | 中船第九设计研究院工程有限公司 | Underwater coating construction method for ship engineering |
| CN112122086A (en) * | 2020-09-02 | 2020-12-25 | 葫芦岛渤船工贸通和防腐有限公司 | Construction method of water-based heavy-duty fluorocarbon coating |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107386550A (en) * | 2017-06-09 | 2017-11-24 | 斓图涂装工程（上海）有限公司 | A kind of steel construction exposed parts fire prevention, the construction method of anti-corrosion wood grain coating |
| CN112024340A (en) * | 2020-04-27 | 2020-12-04 | 中船第九设计研究院工程有限公司 | Underwater coating construction method for ship engineering |
| CN112122086A (en) * | 2020-09-02 | 2020-12-25 | 葫芦岛渤船工贸通和防腐有限公司 | Construction method of water-based heavy-duty fluorocarbon coating |
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