CN114405788B - Corrosion prevention method for brine collecting and transporting device - Google Patents

Corrosion prevention method for brine collecting and transporting device Download PDF

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CN114405788B
CN114405788B CN202111434652.2A CN202111434652A CN114405788B CN 114405788 B CN114405788 B CN 114405788B CN 202111434652 A CN202111434652 A CN 202111434652A CN 114405788 B CN114405788 B CN 114405788B
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parts
weight
layer
corrosion
epoxy resin
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CN114405788A (en
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代良云
李永红
周兴斌
戴青
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Ningxia Xinghao Yongsheng Salt Industry Technology Co ltd
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Ningxia Xinghao Yongsheng Salt Industry Technology Co ltd
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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
    • 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
    • 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
    • B05D3/12—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
    • B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
    • 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
    • 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
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • 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
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic

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Abstract

The application provides an anti-corrosion method of a brine collecting and transporting device, which comprises the following steps: surface cleaning: cleaning oxide skin and dust on the surface; surface polishing and rust removal: sand blasting is carried out on the rusted part of the surface to enable the surface to show metallic luster, and the roughness reaches Ry=40-80 mu m; and (3) surface machining: grinding and/or welding flaws caused by sand blasting on the surface, blowing dust by compressed air, and wiping greasy dirt by using a solvent; finally, an anti-corrosion layer is coated on the surface, wherein the anti-corrosion layer comprises a modified epoxy resin clay layer, a phenolic epoxy zinc phosphate primer layer, a five-cloth six-oil anti-corrosion layer and a phenolic epoxy glass scale surface paint layer which are sequentially arranged from bottom to top, and the dry film thickness of the anti-corrosion layer is more than or equal to 3mm. According to the anti-corrosion coating, the anti-corrosion of the surface of the halogen-collecting and conveying device is realized, the bonding strength and the anti-wear performance of the anti-corrosion coating and the surface of the device are improved, meanwhile, the water absorption rate of the anti-corrosion coating is effectively reduced, the service life of the halogen-collecting and conveying device is prolonged, and the exploitation cost is reduced.

Description

Corrosion prevention method for brine collecting and transporting device
Technical Field
The application relates to the technical field of brine exploitation, in particular to an anti-corrosion method of a brine exploitation and transportation device.
Background
Salts are a necessity for human life, are basic raw materials for the chemical industry, are the most commonly utilized nonmetallic mineral raw materials in the world, and have wide application in agriculture and other industries. With the development of the chemical industry and the development of new application fields and the annual increase of population, the demand for salt is increasing. China has rich underground brine resources, and the exploitation strength and scale of underground salt mine brine are gradually increased in China at present.
The main task of brine exploitation is brine exploitation and brine transportation, because brine is high-concentration brine containing various chemical components, such as Na + 、Cl - 、NO 3 - 、K + 、SO 4 2- And the like, is a strong electrolyte solution, so that in the process of brine collection or brine delivery, the temperature change, impact and stirring of brine and the vapor thereof inevitably lead the contact part of the brine collection and delivery device and the brine to be corroded strongly. Along with the increase of corrosion, the wall thickness of the device becomes thinner gradually, the service life of the device is influenced, the device needs to be stopped and replaced in time, even the brine collecting and conveying work cannot be normally carried out, the cost of brine collecting can be greatly increased, and the high-input low-output phenomenon of the brine industry can be caused. Therefore, corrosion protection of the brine recovery and delivery device is a problem to be solved.
Disclosure of Invention
The application provides an anti-corrosion method of a brine conveying device for solving the problem of serious corrosion of the surface of the brine conveying device, improving the bonding strength and anti-abrasion performance of an anti-corrosion layer and the surface of the device, effectively reducing the impact corrosion of brine to the surface of the device, simultaneously reducing the water absorption rate of the anti-corrosion layer, prolonging the service life of the brine conveying device and reducing the brine exploitation cost.
The application provides an anti-corrosion method of a brine collecting and transporting device, which comprises the following steps:
s1, cleaning the surface of a halogen collecting and conveying device: the oxide skin and dust on the surface are cleaned up, which is beneficial to the surface of the brine collecting and transporting device to be fully contacted with the anti-corrosion layer.
S2, surface polishing and rust removal: and (3) carrying out sand blasting treatment on the rusted part of the surface to enable the surface to show metallic luster, wherein the roughness of the polished and derusted surface reaches Ry=40-80 mu m. The sand blasting treatment is beneficial to increasing the contact area between the surface of the brine collecting and transporting device and the anti-corrosion layer, thereby improving the bonding strength between the surface and the anti-corrosion layer.
S3, surface machining: the surface is sanded to cause flaws, flattened and/or welded, and the dust is blown off with compressed air and the oil is wiped off with a solvent. Polishing and welding are favorable for keeping the thickness of the surface of the device uniform and consistent, and cleaning dust and greasy dirt enables the corrosion-resistant layer to be firmly bonded.
S4, coating an anti-corrosion layer on the surface, wherein the anti-corrosion layer comprises a modified epoxy resin clay layer, a phenolic epoxy zinc phosphate primer layer, a five-cloth six-oil anti-corrosion layer and a phenolic epoxy glass scale surface paint layer which are sequentially arranged from bottom to top, and the dry film thickness of the anti-corrosion layer is more than or equal to 3mm.
Firstly, a modified epoxy resin cement layer is coated, the welding line on the surface of the halogen collecting and transporting device is leveled, so that the surface is smoother, substances with corrosion properties outside can be effectively prevented from contacting the surface of the device, the bonding strength of the modified epoxy resin cement and the surface of the device is high, the anti-abrasion performance is good, the water absorption rate is low, and a layer of compact protective film is formed on the surface of the halogen collecting and transporting device. And secondly, the phenolic epoxy zinc phosphate primer layer is combined with the modified epoxy resin cement layer, so that the corrosion of corrosive substances to the surface can be effectively prevented. The corrosion resistance and the structural strength are further enhanced through the five-cloth six-oil corrosion-resistant layer. The phenolic epoxy glass flake finishing paint can play a role in sealing, meanwhile, the thickness of an anti-corrosion layer is increased, the anti-corrosion capability is improved, the corrosion of brine and brine steam to a brine collecting and transporting device is effectively prevented, and the dry film thickness of the anti-corrosion layer is preferably 3-3.2mm.
Through the scheme, the purpose of corrosion prevention of the surface of the brine collecting and transporting device is achieved, the contact area between the surface of the brine collecting and transporting device and the corrosion prevention layer is increased by cleaning, polishing and coating the corrosion prevention layer after machining the surface, the corrosion prevention layer is composed of a modified epoxy resin cement layer, a phenolic epoxy zinc phosphate primer layer, a five-cloth six-oil corrosion prevention layer and a phenolic epoxy glass scale surface paint layer, the thickness of the corrosion prevention layer is increased, permeation of an external corrosion medium is effectively isolated, meanwhile, the adhesive strength and the anti-abrasion capability are enhanced, impact corrosion of brine to the device is effectively reduced, the water absorption rate is reduced, the service life of the brine collecting and transporting device is prolonged, and the brine exploitation cost is reduced.
Optionally, in the sand blasting treatment, the sand grains are diamond sand, the size of the sand grains is 0.5-2mm, the pressure of sand blasting gas is 7-9MPa, the distance between the nozzle and the surface of the brine collecting and delivering device is 30-50cm, and the injection angle is 45-60 degrees. The sand blasting treatment is favorable for removing the rust on the surface, so that the contact area between the surface of the brine collecting and transporting device and the anticorrosive coating is increased.
Optionally, the compressed air pressure is 7-9MPa, and the solvent is banana oil and/or ethanol. And the dirt attached to the surface is cleaned, so that the surface to be coated is kept clean and tidy, and the coating is convenient.
Optionally, the five-cloth six-oil anti-corrosion layer comprises five tension cloth layers and six anti-corrosion oil layers, and the tension cloth layers are arranged between two adjacent anti-corrosion oil layers. Through the setting of anticorrosive oil reservoir and pulling force cloth layer quantity and position, strengthened the intensity of five cloth six oily anticorrosive coating and whole anticorrosive coating.
Optionally, the anti-corrosion oil layer is made of epoxy resin, and the tension cloth layer is made of glass fiber cloth. The epoxy resin has corrosion resistance, and the glass fiber cloth can improve the corrosion resistance and mechanical strength of the five-cloth six-oil anticorrosive layer.
Optionally, the thickness of the wet film of the phenolic epoxy zinc phosphate primer layer is 100-110 mu m, the thickness of the wet film of the five-cloth six-oil anticorrosive layer is 2500-2600 mu m, and the thickness of the wet film of the phenolic epoxy glass flake finishing paint layer is 480-500 mu m. The proper thickness of the anti-corrosion layer can enhance the binding force and the mutual synergistic effect between the paint films, so that the anti-corrosion performance of the whole anti-corrosion layer is optimal.
Optionally, the modified epoxy resin adhesive plaster for the modified epoxy resin adhesive plaster layer comprises a component A and a component B, wherein the component A comprises the following raw materials uniformly dispersed in parts by weight:
80-130 parts of epoxy resin;
10-20 parts by weight of active dilution toughening agent;
180-210 parts of talcum powder;
20-30 parts of quartz powder;
4-12 parts by weight of fumed silica;
2-5 parts by weight of a surface enhancer;
the component B comprises the following raw materials in parts by weight:
10-20 parts by weight of active dilution toughening agent;
30-50 parts of curing agent;
100-150 parts of talcum powder;
2-5 parts of accelerator.
The reactive diluent toughening agent not only can enhance the toughness of the epoxy resin, but also is a good diluent. Talcum powder is used as a filler, can play a role of a skeleton, has good covering power on the surface, ensures that an anti-corrosion layer is firmer, can reduce the shrinkage and the thermal expansion coefficient of the epoxy resin cement, is low in cost and easy to obtain, and reduces the cost. The quartz powder is also a filler, has certain hardness, and enhances the mechanical strength of the epoxy resin cement. The fumed silica has thickening and thixotropic effects, so that the epoxy resin cement is finer and finer, and is not easy to curl after film formation. The surface reinforcing agent enables the bonding strength of the epoxy resin cement and the surface of the brine-collecting and conveying device to be higher, the strength of resisting the flushing and grinding of brine to be higher, and the water absorption rate to be lower. The curing agent enables the epoxy resin cement to be cured on the surface to form a film, and the anti-corrosion performance is exerted. The accelerator can accelerate the curing speed and has certain acceleration effect on the overall performance of the daub.
Optionally, the surface enhancer comprises iron tetracarboxyl phenyl porphyrin and tert-butyl carbamate, and the weight ratio of the iron tetracarboxyl phenyl porphyrin to the tert-butyl carbamate is 1-4:1.
Epoxy resin cement is one of the thermosetting resin types with quite wide application in the modern industry, has excellent corrosion resistance and is easy to cure, but has high crosslinking density after curing and a three-dimensional network structure, so the epoxy resin cement has the defects of brittleness, poor impact resistance and the like. Therefore, the ferrocarboxyl phenyl porphyrin iron and the tert-butyl carbamate are added into the epoxy resin mortar to synergistically improve the defect of brittle paint film after the epoxy resin mortar is solidified, and the flowing of brine in the process of brine collection and transportation has a certain flushing and grinding phenomenon on the surface of the device, so that the bonding strength of the mortar and the surface of the brine collection and transportation device is increased by adding the surface reinforcing agent, and further the anti-grinding performance of the mortar layer is improved.
Optionally, the preparation process of the modified epoxy resin cement comprises the following steps:
respectively selecting 80-130 parts by weight of epoxy resin, 10-20 parts by weight of reactive diluent toughening agent, 180-210 parts by weight of talcum powder, 20-30 parts by weight of quartz powder, 4-12 parts by weight of fumed silica and 2-5 parts by weight of surface reinforcing agent, adding into a stirring tank, and stirring to obtain a component A;
respectively selecting 10-20 parts by weight of reactive diluent toughening agent, 30-50 parts by weight of curing agent, 100-150 parts by weight of talcum powder and 2-5 parts by weight of accelerator according to parts by weight, adding into a stirring tank, and stirring to obtain a component B;
and (3) fully stirring and uniformly mixing the component A and the component B according to the weight ratio of 3-9:1 to obtain the modified epoxy resin cement.
Optionally, the reactive diluent toughening agent is ethylene glycol diglycidyl ether and/or alicyclic glycidyl ether, the curing agent is diaminohexylamine and/or diethylenetriamine, and the accelerator is 2,4, 6-tris (dimethylaminomethyl) phenol.
According to the corrosion prevention method for the brine-collecting and conveying device, the purpose of surface corrosion prevention of the brine-collecting and conveying device is achieved through the coating of the corrosion prevention layer, the impact corrosion of brine to the device is effectively reduced, the service life of the brine-collecting and conveying device is prolonged, and the exploitation cost is reduced. Meanwhile, the surface reinforcing agents of tetra-carboxyl phenyl porphyrin iron and tert-butyl carbamate are added into the epoxy resin cement, so that on one hand, the bonding strength between the epoxy resin cement and the surface of the brine collecting and transporting device and the bonding strength between the epoxy resin cement and the phenolic epoxy zinc phosphate primer are improved, on the other hand, the anti-abrasion performance of the anti-corrosion layer on brine are also improved, and meanwhile, the water absorption rate of the anti-corrosion layer is reduced, so that the anti-corrosion layer plays a barrier role between the surface of the device and the brine, and the brine collecting and transporting device is effectively protected.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments or the prior art descriptions, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a process flow diagram of an anti-corrosion method for a halogen collection and delivery device according to an embodiment of the present application.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application are clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, are also within the scope of the present application based on the embodiments herein.
Fig. 1 is a process flow chart of an anti-corrosion method of a halogen collection and delivery device according to an embodiment of the present application, as shown in fig. 1, the method includes:
s1, cleaning the surface of a halogen collecting and conveying device: and cleaning the oxide skin and dust on the surface.
Specifically, the surface of the halogen collecting and transporting device is inspected, oxide skin and dust on the surface are cleaned, and the surface treatment achieves drying, no dust, no oil pollution and other pollution.
S2, surface polishing and rust removal: and (3) carrying out sand blasting treatment on the rusted part of the surface to enable the surface to show metallic luster, wherein the roughness of the polished and derusted surface reaches Ry=40-80 mu m.
Specifically, the surface should be rusted and foreign matter should be removed to such an extent that only a small amount exists in the form of spots or stripes, and the surface should exhibit a remarkable metallic luster, so that the rust removal grade reaches the Sa2.5 grade in the corrosion grade and rust removal grade (SIS 055900) of the steel surface before painting.
S3, surface machining: the surface is sanded to cause flaws, flattened and/or welded, and the dust is blown off with compressed air and the oil is wiped off with a solvent.
Specifically, welding the surface concave part, polishing the surface convex part until the surface is flat, and removing surface dust and oil stains missed by mechanical equipment until the surface is free of welding slag, arc fume and unremoved rust spots.
S4, coating an anti-corrosion layer on the surface, wherein the anti-corrosion layer comprises a modified epoxy resin clay layer, a phenolic epoxy zinc phosphate primer layer, a five-cloth six-oil anti-corrosion layer and a phenolic epoxy glass scale surface paint layer which are sequentially arranged from bottom to top, and the dry film thickness of the anti-corrosion layer is more than or equal to 3mm.
Specifically, the anti-corrosion layer is coated within 6 hours after polishing and rust removal, so as to avoid secondary rust on the surface of the halogen conveying device. Before coating, the surface should be cleaned up with a clean brush or flexible cloth, the surface is kept clean and dry, and then the surface is coated with an anti-corrosion layer. The coating is carried out by adopting a mode of combining brushing and rolling coating, the coating is carried out on a large-area flat part by adopting a rolling coating mode, and the coating is carried out on a small-area corner position by adopting a brushing mode.
Firstly, the modified epoxy resin cement is uniformly coated for two times, and the welding seam on the surface of the halogen-collecting and conveying device is leveled, so that the surface is smoother, substances with corrosion properties outside can be effectively prevented from contacting the surface of the device, meanwhile, the bonding strength and the anti-abrasion performance of a cement layer and an anti-corrosion layer and the surface of the device are improved, and the water absorption rate is reduced. And secondly, the phenolic epoxy zinc phosphate primer layer is coated twice, and the primer and the modified epoxy resin cement are combined to effectively prevent the corrosion of corrosive substances on the surface. And then the five-cloth six-oil anticorrosive coating is coated, so that the corrosion resistance and the structural strength are further enhanced. Finally, the phenolic epoxy glass flake finishing paint is coated twice, so that a sealing effect is achieved, meanwhile, the thickness of an anti-corrosion layer is increased, and the anti-corrosion capability is improved. The dry film thickness of the anti-corrosion layer is more than or equal to 3mm, on one hand, the corrosion of brine and brine steam to the surface of the brine collecting and transporting device can be effectively prevented, on the other hand, the binding force and the mutual synergistic effect between paint films can be enhanced, the paint film layers are mutually dissolved into a whole, excellent interlayer adhesive force is achieved, the anti-corrosion performance of the whole anti-corrosion layer is optimal, and preferably, the dry film thickness of the anti-corrosion layer is 3-3.2mm.
Wherein, the anticorrosive layer coated for two times needs to be coated for the second time after the paint film is cured in the last time. The coating environment temperature should be 5-35 ℃, the relative air humidity is not more than 85%, the surface temperature of the halogen collecting and delivering device should be at least 3 ℃ higher than the dew point temperature, and the relative humidity is below 80% during the coating of the finish paint. When the air temperature is lower than 5 ℃ or higher than 40 ℃, construction is stopped or corresponding measures are needed to improve the environment and the temperature, and construction is performed again when the corresponding environment temperature is reached. After coating, the surface is bright and plump, the color is uniform, and phenomena such as sagging, bubble, pinholes, skinning, wrinkling, unclear boundaries and the like cannot be caused.
Through the scheme, the purpose of corrosion prevention of the surface of the brine collecting and transporting device is achieved, the contact area between the surface of the brine collecting and transporting device and the corrosion prevention layer is increased by cleaning, polishing and coating the corrosion prevention layer after machining the surface, the corrosion prevention layer is composed of a modified epoxy resin cement layer, a phenolic epoxy zinc phosphate primer layer, a five-cloth six-oil corrosion prevention layer and a phenolic epoxy glass scale surface paint layer, the thickness of the corrosion prevention layer is increased, permeation of an external corrosion medium is effectively isolated, meanwhile, the adhesive strength and the anti-abrasion capability are enhanced, impact corrosion of brine to the device is effectively reduced, the water absorption rate is reduced, the service life of the brine collecting and transporting device is prolonged, and the brine exploitation cost is reduced.
Optionally, in the sand blasting treatment, the sand grains are diamond sand, the size of the sand grains is 0.5-2mm, the pressure of sand blasting gas is 7-9MPa, the distance between the nozzle and the surface of the brine collecting and delivering device is 30-50cm, and the injection angle is 45-60 degrees.
Specifically, the diamond grit is selected in the sand blasting treatment, the diamond grit has the characteristic of high hardness, and the diamond grit is sprayed on the surface of the halogen collecting and conveying device under a certain pressure, so that the effects of removing stains and polishing the surface are achieved. Wherein, sand grain size, pressure, spraying distance and spray angle all can influence the polishing effect on the surface, so control the spraying condition in order to avoid polishing the dynamics insufficient or the dynamics too big to cause the damage to the surface.
Optionally, the compressed air pressure is 7-9MPa, and the solvent is banana oil and/or ethanol.
Specifically, the compressed air pressure is controlled to be 7-9MPa, impurities attached to the surface are removed, and then oily or/and non-oily dirt attached to the surface is removed by using banana oil and/or ethanol.
Optionally, the five-cloth six-oil anti-corrosion layer comprises five tension cloth layers and six anti-corrosion oil layers, and the tension cloth layers are arranged between two adjacent anti-corrosion oil layers.
Specifically, after the modified epoxy resin cement is coated, five-cloth six-oil anticorrosive layers are coated, an anticorrosive oil layer is coated firstly, then a tension cloth layer is coated, and the steps are performed according to the sequence that one anticorrosive oil layer is overlapped with one tension cloth layer, so that the tension cloth layers are arranged between two adjacent anticorrosive oil layers.
Optionally, the anti-corrosion oil layer is made of epoxy resin, and the tension cloth layer is made of glass fiber cloth.
Specifically, the glass fiber cloth is alkali-free, twist-free and wax-free glass fiber cloth, the thickness is 0.2mm plus or minus 0.02mm, no glass fiber is exposed when the tension cloth layer is coated, the lap joint of the cloth is 5-8cm, the upper cloth seam and the lower cloth seam are staggered by 5-7cm, and the vertical surface of the cloth stubble is flat and smooth. The five-cloth six-oil anticorrosive coating and the modified epoxy resin cement layer are firmly bonded without bulges, so that corrosion of brine can be reduced, and the anticorrosive performance is stronger.
Optionally, the thickness of the wet film of the phenolic epoxy zinc phosphate primer layer is 100-110 mu m, the thickness of the wet film of the five-cloth six-oil anticorrosive layer is 2500-2600 mu m, and the thickness of the wet film of the phenolic epoxy glass flake finishing paint layer is 480-500 mu m.
Specifically, after each layer of anti-corrosion coating is carried out, whether the thickness of a paint film meets the standard or not is detected according to national standard GB/T13452.2-2008 paint, varnish and film thickness measurement so as to ensure that the anti-corrosion coating is in a proper thickness range and effectively prevent corrosion of the surface of the halogen collecting and transporting device.
Optionally, the modified epoxy resin adhesive plaster for the modified epoxy resin adhesive plaster layer comprises a component A and a component B, wherein the component A comprises the following raw materials uniformly dispersed in parts by weight:
80-130 parts of epoxy resin;
10-20 parts by weight of active dilution toughening agent;
180-210 parts of talcum powder;
20-30 parts of quartz powder;
4-12 parts by weight of fumed silica;
2-5 parts by weight of a surface enhancer;
the component B comprises the following raw materials in parts by weight:
10-20 parts by weight of active dilution toughening agent;
30-50 parts of curing agent;
100-150 parts of talcum powder;
2-5 parts of accelerator.
Optionally, the surface enhancer comprises iron tetracarboxyl phenyl porphyrin and tert-butyl carbamate, and the weight ratio of the iron tetracarboxyl phenyl porphyrin to the tert-butyl carbamate is 1-4:1.
Specifically, the tetra-carboxyl phenyl porphyrin iron molecule has a large pi bond, so that the mechanical strength of the cement is improved, carboxyl can be better adsorbed on the surface, so that a compact paint film is formed on the surface of the cement, the permeability of brine is reduced, and meanwhile, the tert-butyl carbamate molecule can form a coordination bond with the surface, so that the surface of the brine collecting and transporting device is combined more tightly. Therefore, the tetracarboxyl phenyl porphyrin iron and the tert-butyl carbamate have synergistic effect, so that the mechanical strength of the epoxy resin cement layer is higher, the bonding strength and the anti-abrasion strength are increased, meanwhile, a compact paint film is formed, so that the water absorption rate is lower, the permeation of brine is prevented, and the corrosion resistance of the epoxy resin cement is further improved.
Optionally, the preparation process of the modified epoxy resin cement comprises the following steps:
respectively selecting 80-130 parts by weight of epoxy resin, 10-20 parts by weight of reactive diluent toughening agent, 180-210 parts by weight of talcum powder, 20-30 parts by weight of quartz powder, 4-12 parts by weight of fumed silica and 2-5 parts by weight of surface reinforcing agent, adding into a stirring tank, and stirring to obtain a component A;
respectively selecting 10-20 parts by weight of reactive diluent toughening agent, 30-50 parts by weight of curing agent, 100-150 parts by weight of talcum powder and 2-5 parts by weight of accelerator according to parts by weight, adding into a stirring tank, and stirring to obtain a component B;
and (3) fully stirring and uniformly mixing the component A and the component B according to the weight ratio of 3-9:1 to obtain the modified epoxy resin cement.
Optionally, the reactive diluent toughening agent is ethylene glycol diglycidyl ether and/or alicyclic glycidyl ether, the curing agent is diaminohexylamine and/or diethylenetriamine, and the accelerator is 2,4, 6-tris (dimethylaminomethyl) phenol.
Specifically, the modified epoxy resin cement consists of solid powder and a liquid phase solvent, and the reactive diluent toughening agent not only can enhance the toughness of the modified strong epoxy resin and improve the brittleness of the modified epoxy resin cement, but also is a good diluent; the curing agent enables the epoxy resin cement to be cured on the surface to form a film, and the anti-corrosion performance is exerted; the accelerator not only can accelerate the curing speed, but also has certain accelerating effect on the overall performance of the daub.
The technical scheme of the present application is illustrated in detail by specific examples below.
Example 1
An anti-corrosion method of a brine collecting and transporting device comprises the following steps:
s1, cleaning the surface of a halogen collecting and conveying device: checking the surface of the halogen collecting and transporting device, cleaning oxide skin and dust on the surface, and carrying out surface treatment to achieve the purposes of drying, no dust, no oil pollution and other pollution including soluble salt.
S2, surface polishing and rust removal: and (3) carrying out sand blasting on the rust-removing part of the surface to enable the surface to show metallic luster, wherein the roughness of the polished and rust-removed surface reaches Ry=40-80 mu m, and the rust-removing grade reaches Sa2.5 grade in the corrosion grade and rust-removing grade (SIS 055900) of the steel surface before coating. The sand grain in the sand blasting treatment is diamond sand, the size of the sand grain is 2mm, the pressure of sand blasting gas is 8MPa, the distance between a nozzle and the surface of the brine collecting and delivering device is 30cm, and the injection angle is 45 degrees.
S3, surface machining: polishing the surface bulge, welding the concave part to be flat, removing surface dust by using compressed air with the pressure of 7MPa, and wiping off oil stains missed by mechanical equipment by using banana oil and/or ethanol solvent until the surface is free of welding slag, arc fume and unremoved rust spots.
S4, coating an anticorrosive layer on the surface: the anticorrosive coating comprises a modified epoxy resin clay layer, a phenolic epoxy zinc phosphate primer layer, a five-cloth six-oil anticorrosive layer and a phenolic epoxy glass flake top coat layer which are sequentially arranged from bottom to top, wherein the wet film thickness of the phenolic epoxy zinc phosphate primer layer is 100 mu m, the wet film thickness of the five-cloth six-oil anticorrosive layer is 2500 mu m, and the wet film thickness of the phenolic epoxy glass flake top coat layer is 500 mu m. The dry film thickness of the anticorrosive layer is 3mm. After rust removal, an anti-corrosion layer is coated within 6 hours according to requirements so as to prevent secondary rust of the steel.
Before coating, cleaning the surface with a clean brush or other flexible cloth, keeping the surface clean and dry, and then coating the surface with an anti-corrosion layer. The coating is carried out by combining brush coating and rolling coating. Firstly, uniformly coating modified epoxy resin cement for two times; secondly, painting a phenolic epoxy zinc phosphate primer layer twice; then coating the five-cloth six-oil anticorrosive coating; and finally, coating the phenolic epoxy glass flake finishing paint for two times.
The modified epoxy resin adhesive plaster for the modified epoxy resin adhesive plaster layer comprises a component A and a component B, wherein the component A comprises the following raw materials uniformly dispersed in parts by weight:
80 parts by weight of an epoxy resin;
10 parts by weight of active dilution toughening agent which consists of ethylene glycol diglycidyl ether and alicyclic glycidyl ether in a weight ratio of 1:1;
180 parts of talcum powder;
20 parts of quartz powder;
4 parts by weight of fumed silica;
2 parts by weight of a surface enhancer, wherein the surface enhancer consists of iron tetracarboxyl phenyl porphyrin and tert-butyl carbamate in a weight ratio of 1:1;
the component B comprises the following raw materials in parts by weight:
10 parts by weight of reactive diluent toughening agent;
30 parts of curing agent, wherein the curing agent consists of diaminohexylamine and diethylenetriamine in a weight ratio of 1:1;
100 parts of talcum powder;
2 parts by weight of an accelerator which is 2,4, 6-tris (dimethylaminomethyl) phenol.
The preparation process of the modified epoxy resin cement comprises the following steps:
(1) According to the weight portions, 80 portions of epoxy resin, 10 portions of reactive diluent toughening agent, 180 portions of talcum powder, 20 portions of quartz powder, 4 portions of fumed silica and 2 portions of surface reinforcing agent are respectively selected, and added into a stirring tank for stirring to obtain the component A.
(2) And (3) respectively selecting 10-20 parts by weight of active dilution toughening agent, 30-50 parts by weight of curing agent, 100 parts by weight of talcum powder and 2 parts by weight of accelerator according to parts by weight, adding into a stirring tank, and stirring to obtain the component B.
(3) And fully stirring and uniformly mixing the component A and the component B according to the weight ratio of 3:1 to obtain the modified epoxy resin cement.
Example 2
The corrosion prevention method of the brine collecting and transporting device is different from the embodiment 1 only in that:
s4, the dry film thickness of the anticorrosive coating of the embodiment is 3.1mm.
The modified epoxy resin adhesive plaster for the modified epoxy resin adhesive plaster layer comprises a component A and a component B, wherein the component A comprises the following raw materials uniformly dispersed in parts by weight:
95 parts by weight of epoxy resin;
13 parts of active dilution toughening agent which consists of ethylene glycol diglycidyl ether and alicyclic glycidyl ether in a weight ratio of 1:3;
192 parts by weight of talcum powder;
23 parts of quartz powder;
6 parts by weight of fumed silica;
3 parts by weight of a surface enhancer, wherein the surface enhancer consists of iron tetracarboxyl phenyl porphyrin and tert-butyl carbamate in a weight ratio of 3:1;
the component B comprises the following raw materials in parts by weight:
13 parts by weight of a reactive diluent toughening agent;
33 parts by weight of a curing agent, wherein the curing agent consists of diaminohexylamine and diethylenetriamine in a weight ratio of 1:2;
110 parts of talcum powder;
3 parts by weight of an accelerator, wherein the accelerator is 2,4, 6-tris (dimethylaminomethyl) phenol.
The preparation process of the modified epoxy resin cement comprises the following steps:
(1) According to the weight portions, respectively selecting 95 weight portions of epoxy resin, 13 weight portions of reactive diluent toughening agent, 192 weight portions of talcum powder, 23 weight portions of quartz powder, 6 weight portions of fumed silica and 3 weight portions of surface reinforcing agent, adding the mixture into a stirring tank, and stirring the mixture to obtain the component A.
(2) 13 parts by weight of reactive diluent toughening agent, 33 parts by weight of curing agent, 110 parts by weight of talcum powder and 3 parts by weight of accelerator are respectively selected according to parts by weight, and are added into a stirring tank to be stirred to obtain the component B.
(3) And (3) fully stirring and uniformly mixing the component A and the component B according to the weight ratio of 6:1 to obtain the modified epoxy resin cement.
Example 3
The corrosion prevention method of the brine collecting and transporting device is different from the embodiment 1 only in that:
s4, the dry film thickness of the anticorrosive coating of the embodiment is 3.2mm.
The modified epoxy resin adhesive plaster for the modified epoxy resin adhesive plaster layer comprises a component A and a component B, wherein the component A comprises the following raw materials uniformly dispersed in parts by weight:
114 parts by weight of an epoxy resin;
15 parts of active dilution toughening agent which consists of ethylene glycol diglycidyl ether and alicyclic glycidyl ether in a weight ratio of 1:5;
200 parts of talcum powder;
27 parts of quartz powder;
9 parts by weight of fumed silica;
4 parts by weight of a surface enhancer, wherein the surface enhancer consists of iron tetracarboxyl phenyl porphyrin and tert-butyl carbamate in a weight ratio of 4:1;
the component B comprises the following raw materials in parts by weight:
17 parts of reactive diluent toughening agent;
37 parts of curing agent, wherein the curing agent consists of diaminohexylamine and diethylenetriamine in a weight ratio of 1:2;
130 parts of talcum powder;
4 parts by weight of an accelerator, wherein the accelerator is 2,4, 6-tris (dimethylaminomethyl) phenol.
The preparation process of the modified epoxy resin cement comprises the following steps:
(1) According to the weight portions, 114 weight portions of epoxy resin, 15 weight portions of reactive diluent toughening agent, 200 weight portions of talcum powder, 27 weight portions of quartz powder, 9 weight portions of fumed silica and 4 weight portions of surface reinforcing agent are respectively selected, and are added into a stirring tank to be stirred to obtain the component A.
(2) According to the weight portions, 17 weight portions of active dilution toughening agent, 37 weight portions of curing agent and 130 weight portions of talcum powder and 4 weight portions of accelerator are respectively selected and added into a stirring tank to be stirred to obtain the component B.
(3) And fully stirring and uniformly mixing the component A and the component B according to the weight ratio of 9:1 to obtain the modified epoxy resin cement.
Example 4
The corrosion prevention method of the brine collecting and transporting device is different from the embodiment 1 only in that:
s4, the dry film thickness of the anticorrosive coating of the embodiment is 3.2mm.
The modified epoxy resin adhesive plaster for the modified epoxy resin adhesive plaster layer comprises a component A and a component B, wherein the component A comprises the following raw materials uniformly dispersed in parts by weight:
130 parts by weight of an epoxy resin;
20 parts of active dilution toughening agent;
210 parts of talcum powder;
30 parts of quartz powder;
12 parts by weight of fumed silica;
5 parts by weight of a surface enhancer;
the component B comprises the following raw materials in parts by weight:
20 parts of active dilution toughening agent;
50 parts by weight of a curing agent;
150 parts of talcum powder;
5 parts of accelerator.
The preparation process of the modified epoxy resin cement comprises the following steps:
(1) 130 parts of epoxy resin, 20 parts of reactive diluent toughening agent, 210 parts of talcum powder, 30 parts of quartz powder, 12 parts of fumed silica and 5 parts of surface reinforcing agent are respectively selected according to parts by weight, and added into a stirring tank for stirring to obtain the component A.
(2) And respectively selecting 20 parts by weight of reactive diluent toughening agent, 50 parts by weight of curing agent, 150 parts by weight of talcum powder and 5 parts by weight of accelerator according to parts by weight, adding into a stirring tank, and stirring to obtain the component B.
(3) And fully stirring and uniformly mixing the component A and the component B according to the weight ratio of 9:1 to obtain the modified epoxy resin cement.
Comparative example 1
The corrosion prevention method of the brine collecting and transporting device is different from the embodiment 1 only in that:
the component A of the modified epoxy resin adhesive for the modified epoxy resin adhesive layer is not added with a surface reinforcing agent.
Comparative example 2
The corrosion prevention method of the brine collecting and transporting device is different from the embodiment 1 only in that:
2 parts by weight of a surface enhancer in the component A of the modified epoxy resin adhesive plaster for the modified epoxy resin adhesive plaster layer, wherein the surface enhancer is tetracarboxyl phenyl porphyrin iron.
Comparative example 3
The corrosion prevention method of the brine collecting and transporting device is different from the embodiment 1 only in that:
2 parts by weight of a surface reinforcing agent in component A of the modified epoxy resin adhesive plaster for the modified epoxy resin adhesive plaster layer, wherein the surface reinforcing agent is tert-butyl carbamate.
Experimental example 1
The experimental method comprises the following steps: the properties of the modified epoxy resin cement layers formulated by the methods using examples 1 to 4 and comparative examples 1 to 3 were examined according to the following national standards.
According to DL/T5193-2004 epoxy resin mortar technical procedure, the adhesive strength of the modified epoxy resin cement layer on the surface of the halogen-collecting and conveying device is tested.
The modified epoxy resin cement layer was tested for impact strength under three different impact conditions (no pressure 40m/s, pressure 15m/s, pressure 20 m/s) according to SL352-2006 Water borne concrete test procedure.
The water absorption of the modified epoxy resin cement layer was tested according to GB/T1034-2008 determination of Plastic Water absorption. Each example was run in 3 replicates and the average was taken and the test results were compared to give the results shown in table one.
List one
As can be seen from table one, the modified epoxy resin cements of examples 1 to 4 have significantly improved adhesion strength and abrasion resistance to the surface of the brine-collecting and transporting device, and significantly lower water absorption compared with comparative examples 1 to 3. In contrast, the surface reinforcing agents in comparative examples 2 and 3 are added with only single substances of tetra-carboxyl phenyl porphyrin iron and tert-butyl carbamate respectively, the bonding strength and the anti-abrasion strength between the modified epoxy resin cement and the surface of the halogen collecting and transporting device are improved relative to those in comparative example 1, the water absorption is smaller, but the improvement degree is smaller compared with those in examples 1 to 4.
Because the tetracarboxyl phenyl porphyrin iron and the tert-butyl carbamate are added into the epoxy resin adhesive cement, the tetracarboxyl phenyl porphyrin iron molecule contains a large pi bond, the rigidity and the mechanical strength of the epoxy resin adhesive cement can be improved, and the carboxyl acts on the surface metal, so that the modified epoxy resin adhesive cement is more firmly adsorbed on the surface of a halogen collecting and transporting device, and the external corrosion medium is effectively prevented from contacting the surface of the device. Meanwhile, the tert-butyl carbamate molecules and the tetracarboxyl phenyl porphyrin iron molecules can form coordination bonds with iron elements on the surface, so that the cement is more firmly adsorbed on the surface and is more tightly combined with the surface of the halogen collecting and transporting device. Therefore, the tetracarboxyl phenyl porphyrin iron and the tert-butyl carbamate have synergistic effect, so that the mechanical strength of the epoxy resin cement layer is higher, the impact resistance and the adhesion performance are stronger, meanwhile, a compact paint film is formed, so that the water absorption rate is lower, the permeation of brine and brine steam is prevented, and the corrosion resistance of the epoxy resin cement is further improved.
Experimental example 2
The experimental method comprises the following steps: the properties of the anticorrosive layers of examples 1 to 4 and comparative example 1 were examined by the same method as in experimental example 1. Each example was provided with 3 parallel experiments and the average was taken and the test results were compared to give the results shown in table two.
Watch II
From the second table, after the modified epoxy resin cement layer, the phenolic epoxy zinc phosphate primer layer, the five-cloth six-oil anticorrosive layer and the phenolic epoxy glass flake surface paint layer are sequentially coated, the bonding strength and the anti-abrasion strength of the integral anticorrosive layer are further improved, and the water absorption rate is smaller. The phenolic epoxy zinc phosphate primer layer and the clay layer are combined to effectively prevent the corrosion of corrosive substances to the surface; the corrosion resistance and the structural strength are further enhanced through the five-cloth six-oil anticorrosive layer; the phenolic epoxy glass flake finishing paint can play a role in sealing, meanwhile, the thickness of an anti-corrosion layer is increased, the anti-corrosion capacity is improved, and the corrosion of brine and brine steam to a brine collecting and transporting device is effectively prevented.
Finally, it should be noted that the above embodiments are merely for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand; the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (7)

1. An anti-corrosion method for a brine collecting and transporting device is characterized by comprising the following steps:
s1, cleaning the surface of a halogen collecting and conveying device: cleaning up the oxide skin and dust on the surface;
s2, surface polishing and rust removal: sand blasting is carried out on the rusted part of the surface to enable the surface to present metallic luster, and the roughness of the polished and derusted surface reaches Ry=40-80 mu m;
s3, surface machining: grinding and/or welding the surface with flaws caused by sand blasting, blowing dust with compressed air, and wiping off greasy dirt with a solvent;
s4, coating an anti-corrosion layer on the surface, wherein the anti-corrosion layer comprises a modified epoxy resin clay layer, a phenolic epoxy zinc phosphate primer layer, a five-cloth six-oil anti-corrosion layer and a phenolic epoxy glass scale surface paint layer which are sequentially arranged from bottom to top, the dry film thickness of the anti-corrosion layer is 3-3.2mm, the coating environment temperature is 5-35 ℃, and the relative air humidity is not more than 85%;
the modified epoxy resin adhesive plaster for the modified epoxy resin adhesive plaster layer comprises a component A and a component B, wherein the component A comprises the following raw materials uniformly dispersed in parts by weight:
80-130 parts of epoxy resin;
10-20 parts by weight of active dilution toughening agent;
180-210 parts of talcum powder;
20-30 parts of quartz powder;
4-12 parts by weight of fumed silica;
2-5 parts by weight of a surface enhancer;
the component B comprises the following raw materials in parts by weight:
10-20 parts by weight of active dilution toughening agent;
30-50 parts of curing agent;
100-150 parts of talcum powder;
2-5 parts of accelerator;
the surface enhancer comprises iron tetracarboxyl phenyl porphyrin and tert-butyl carbamate, and the weight ratio of the iron tetracarboxyl phenyl porphyrin to the tert-butyl carbamate is 1-4:1;
the reactive diluent toughening agent is ethylene glycol diglycidyl ether and/or alicyclic glycidyl ether, the curing agent is diaminohexylamine and/or diethylenetriamine, and the accelerator is 2,4, 6-tris (dimethylaminomethyl) phenol.
2. The method according to claim 1, wherein in the sand blasting treatment, sand grains are diamond grains, the sand grain size is 0.5-2mm, the sand blasting gas pressure is 7-9MPa, the nozzle is 30-50cm from the surface of the brine production and transportation device, and the injection angle is 45-60 °.
3. The method according to claim 1, wherein the compressed air pressure is 7-9MPa and the solvent is banana oil and/or ethanol.
4. The method of claim 1, wherein the five-cloth-six-oil corrosion-resistant layer comprises five tension cloth layers and six corrosion-resistant oil layers, and the tension cloth layers are disposed between two adjacent corrosion-resistant oil layers.
5. The method of claim 4, wherein the anti-corrosive oil layer is epoxy resin and the tension cloth layer is fiberglass cloth.
6. The method of claim 1, wherein the phenolic epoxy zinc phosphate primer layer has a wet film thickness of 100-110 μιη, the five-to-six-oil corrosion protection layer has a wet film thickness of 2500-2600 μιη, and the phenolic epoxy glass flake topcoat layer has a wet film thickness of 480-500 μιη.
7. The method of claim 1, wherein the preparation of the modified epoxy cement comprises:
respectively selecting 80-130 parts by weight of epoxy resin, 10-20 parts by weight of reactive diluent toughening agent, 180-210 parts by weight of talcum powder, 20-30 parts by weight of quartz powder, 4-12 parts by weight of fumed silica and 2-5 parts by weight of surface reinforcing agent, adding into a stirring tank, and stirring to obtain a component A;
respectively selecting 10-20 parts by weight of reactive diluent toughening agent, 30-50 parts by weight of curing agent, 100-150 parts by weight of talcum powder and 2-5 parts by weight of accelerator according to parts by weight, adding into a stirring tank, and stirring to obtain a component B;
and (3) fully stirring and uniformly mixing the component A and the component B according to the weight ratio of 3-9:1 to obtain the modified epoxy resin cement.
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