CN107513348B - Anticorrosive paint for buried steel member and preparation method and application thereof - Google Patents
Anticorrosive paint for buried steel member and preparation method and application thereof Download PDFInfo
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- 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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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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
- B05D7/16—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 using synthetic lacquers or varnishes
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- 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
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/103—Anti-corrosive paints containing metal dust containing Al
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- 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
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0812—Aluminium
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0893—Zinc
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/327—Aluminium phosphate
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention relates to a protection technology of a buried steel member, in particular to an anticorrosive paint for the buried steel member and a preparation method and application thereof. The coating comprises the following components in parts by weight: 30-100 parts of organic silicon resin, 20-80 parts of epoxy resin, 5-60 parts of high-temperature-resistant anticorrosive filler, 1: 3-9 parts of curing agent and epoxy resin and 0-50 parts of diluent. And (3) putting the anti-corrosion filler into a grinding and crushing machine, mixing and stirring for 5-10 min, and putting the organic silicon resin, the epoxy resin, the anti-corrosion filler and the dimethylbenzene into a stirring tank according to a proportion and stirring uniformly to obtain the component A. And (3) mixing the component A and the component B according to the proportion, uniformly stirring, preparing a coating on the surface of the metal part subjected to surface sand blasting, insulating the coating in an oven at 150 +/-5 ℃ for 2-3 h, and then air-cooling to room temperature to obtain the anticorrosive coating. The coating has excellent anti-corrosion performance, and solves the corrosion problem of metal components serving in a high-humidity and high-salt soil environment.
Description
Technical Field
The invention relates to an anti-corrosion technology of a metal component, in particular to an anti-corrosion coating for a buried steel component, a preparation method and application thereof, and belongs to the field of fine chemical engineering.
Background
Oil, gas and water pipelines, steel rails, their connectors and cables buried underground are often corroded by soil, so that the pipelines are perforated to leak oil, water or gas, or cause telecommunication failures. Moreover, the devices are often difficult to overhaul, causing great loss and damage to production. The corrosion of metal materials in high humidity soil is serious, and the soil corrosion causes damage to buried metal materials and components, which not only causes great economic loss, but also causes operation accidents of equipment.
Soil is a heterogeneous, biologically active and ionically conductive, porous capillary colloidal system composed of various particulate minerals, organic matter, and moisture, air, microorganisms, and the like. It contains solid particles such as: sand, ash, sludge and humus, in which there are many curved micro-pores (capillaries) through which water and air can reach deep into the soil.
Corrosion of metals in soil is affected by soil moisture content, salt content (including Cl)-、
Etc.), the resistivity of the soil, the pH value, the temperature, the soil granularity, the oxidation-reduction potential, bacteria and other factors, the situation is very complicated, and the control method of the soil corrosion process mainly comprises anode control, cathode control, resistance control and the like.
With the acceleration of the urbanization process, the tramcar is a novel public transportation mode developed and constructed in recent years, and effectively reduces the urban traffic pressure. The steel rails of the tramcar are generally made of weather-resistant steel with good corrosion resistance, and the steel rails are buried underground in a clamping plate and bolt connection mode. The strong corrosiveness of the soil causes certain corrosion to the steel rail and the connecting piece thereof, and particularly the corrosion damage of the bolt is more serious. After the bolts are corroded, effective combination between the steel rails is influenced, hidden dangers are brought to safe operation of the tramcar, and meanwhile maintenance difficulty is caused.
Disclosure of Invention
The invention aims to provide an anticorrosive paint for a buried steel member, and a preparation method and application thereof, which solve the corrosion problem of a metal member serving in a humid and high-salinity soil environment, ensure the safe operation of the buried steel member, and reduce the production and maintenance cost.
The technical scheme of the invention is as follows:
an anticorrosive coating for a buried steel member comprises a component A and a component B, wherein the component A comprises organic silicon resin, epoxy resin, anticorrosive filler and a diluent, and the component B is an epoxy resin curing agent; according to the mass parts, 30-100 parts of organic silicon resin, 20-80 parts of epoxy resin and 5-60 parts of anticorrosive filler, wherein the mass ratio of the curing agent to the epoxy resin is 1 (3-9), and 0-50 parts of diluent; wherein, the anti-corrosion filler is any mixture of more than two of aluminum powder, floating aluminum powder, zinc powder, alumina powder, titanium dioxide powder, copper chromium black powder, mica powder, ferrophosphorus powder and aluminum tripolyphosphate powder.
The anticorrosive coating for the buried steel member preferably comprises the following components in parts by weight: 50-80 parts of organic silicon resin, 30-60 parts of epoxy resin and 10-40 parts of anticorrosive filler, wherein the mass ratio of the curing agent to the epoxy resin is 1 (4-5), and the diluent is 2-30 parts.
The anticorrosive paint for the buried steel member comprises the following organic silicon resin: one or more than two of methyl organic silicon resin, phenyl organic silicon resin and methyl phenyl organic silicon resin, epoxy resin is one or the mixture of E44 and E51, the epoxy resin curing agent is a reaction type curing agent, and the solvent is xylene.
The anti-corrosion coating for the buried steel member has the particle size of 1-80 mu m and the shape of sphere or fiber.
The preparation method of the anticorrosive coating for the buried steel member comprises the following steps of firstly, putting an anticorrosive filler into a grinding and crushing machine, mixing and stirring at the rotating speed of 500-5000 rpm for 5-10 min, and taking out; weighing the organic silicon resin, the epoxy resin, the anticorrosive filler and the diluent according to the proportion, fully and uniformly mixing, and filtering by using a 100-400-mesh screen to obtain a component A; weighing the epoxy resin curing agent as the component B according to the proportion, and fully and uniformly stirring the epoxy resin curing agent and the component A to form the anticorrosive paint for the buried steel member.
The application of the anticorrosive coating for the buried steel member is characterized in that the anticorrosive coating for the buried steel member is taken, a spraying, brushing or dip-coating mode is adopted, a coating is prepared on the surface of the steel member subjected to sand blasting, the steel member is subjected to heat preservation in a drying oven at the temperature of 150 +/-5 ℃ for 2-3 hours, and then air cooling is carried out to the room temperature, so that the anticorrosive coating is obtained.
The application of the anticorrosive coating for the buried steel member is characterized in that the thickness of one anticorrosive coating is 10-100 mu m, one or more than one coating is carried out as required, and the coating interval of each coating is 10-20 min.
The anti-corrosion coating for the buried steel member is applied, and is suitable for protecting the metal member in a humid, high-salt and high-corrosivity soil environment.
The invention has the following advantages and beneficial effects:
1. the anticorrosive coating developed by the invention has simple preparation process and is easy to realize industrial production.
2. In the invention, the organic silicon resin and the epoxy resin are used as film forming materials, the organic silicon coating is a widely applied coating variety, and a great number of scientific and technological workers develop various products from the 20 th century and the 50 th century. The organic silicon resin is characterized by high temperature resistance, excellent flexibility, electrical performance and waterproof performance, and is often used as a high temperature resistant coating, but the adhesion of the organic silicon resin coating and a metal matrix is poor. Epoxy resin coating is another common anticorrosion coating, has the advantages of excellent corrosion resistance, high adhesion with a base material and the like, and has high brittleness. The invention adopts a physical mixing method to prepare the silicone resin-epoxy resin composite coating, and has the advantages of high flexibility, waterproof performance, good electrical performance of the silicone resin coating, high adhesive force of the epoxy resin coating and excellent corrosion resistance.
3. The invention is suitable for the protection of metal components in moist and corrosive soil environments, the coating is prepared on the surface of the metal component subjected to sand blasting treatment by adopting a spraying, brushing or dip-coating mode, after the coating is cured, after the tramcar system runs for 1 year, the coating is intact, the metal component under the coating is not corroded, and the metal matrix is effectively protected.
Drawings
Fig. 1-3 are macroscopic appearances of a tram rail clamp plate and its fasteners, bolts, nuts and washers after being buried for 1 year, wherein: FIG. 1 is a macroscopic view of a splint after corrosion; FIG. 2 is a macroscopic view of a bolt and a nut after corrosion; FIG. 3 shows the macro topography of the gasket after corrosion (the damage is the damage caused by installation).
Detailed Description
In the specific implementation process, the anticorrosive coating for the buried steel member comprises a component A and a component B, wherein the component A comprises organic silicon resin, epoxy resin, anticorrosive filler and diluent, and the component B is an epoxy resin curing agent. The components are respectively as follows by mass: 30-100 parts of organic silicon resin, 20-80 parts of epoxy resin and 5-60 parts of anticorrosive filler, wherein the proportion of the curing agent to the epoxy resin is 1 (3-9), and 0-50 parts of diluent. Wherein: the organic silicon resin is one or a mixture of more than two of methyl organic silicon resin, phenyl organic silicon resin and methyl phenyl organic silicon resin, the epoxy resin is one or a mixture of E44 and E51, the epoxy resin curing agent is a reaction type curing agent, and the solvent is xylene. The anti-corrosion filler has the grain diameter of 1-80 mu m, and is a mixture of more than two of spherical or fibrous aluminum powder, floating aluminum powder, zinc powder, alumina powder, titanium dioxide powder, copper-chromium black powder, mica powder, ferrophosphorus powder and aluminum tripolyphosphate powder.
The design idea of the anticorrosive paint for the buried steel member is as follows: the organic silicon-epoxy resin composite material with high flexibility, high adhesive force and excellent corrosion resistance is obtained by utilizing the excellent flexibility and waterproof property of the organic silicon resin and the good adhesive force and corrosion resistance function of the epoxy resin and the metal matrix. The single organic silicon-epoxy resin varnish coating has more microscopic defects which can not meet the use requirements, and the protective performance of the coating is obviously improved on the basis of reducing the microscopic defects of the coating by adding multi-scale and multi-type fillers into the composite material. Meanwhile, the coating has excellent anticorrosion function and mechanical property due to the cathode protection effect of the metal powder filler with lower electronegativity, the labyrinth effect of the fibrous filler and the reinforcing effect of the multi-scale filler.
The preparation method of the nano modified organic silicon coating with the high temperature resistance, corrosion resistance and nuclear radiation resistance comprises the following steps:
firstly, putting the anticorrosive filler into a grinding and crushing machine, mixing and stirring at the rotating speed of 500-5000 rpm for 5-10 min, and taking out; weighing the organic silicon resin, the epoxy resin, the anticorrosive filler and the dimethylbenzene according to the proportion, fully and uniformly mixing, and filtering by using a (100-400) mesh screen to obtain a component A; weighing the epoxy resin curing agent as the component B according to the proportion, and fully and uniformly stirring the epoxy resin curing agent and the component A to form the anticorrosive paint for the buried steel member.
The application of the nano modified organic silicon coating with the high temperature resistance, corrosion resistance and nuclear radiation resistance comprises the following steps:
taking the anticorrosive coating for the buried steel member, preparing a coating on the surface of the steel member subjected to sand blasting treatment by adopting a spraying, brushing or dip-coating mode, preserving heat in a drying oven at (150 +/-5) DEG C for 2-3 h, and then air-cooling to room temperature to obtain the anticorrosive coating for the buried steel member. The thickness of one coating is (10-100) mu m, and one or more than one coating is carried out as required, wherein each coating interval is (10-20) min.
The invention is explained in more detail below with reference to the drawings and exemplary embodiments:
example 1
In this example, 2kg of zinc powder with a particle size of 10 μm, 1kg of floating aluminum powder with a particle size of 50 μm, and 0.2kg of mica powder with a particle size of 50 μm were weighed, put into a grinding pulverizer, ground at 2500rpm for 8min, and then taken out. Weighing 30kg of methyl organic silicon resin, 15kg of E44 epoxy resin and 5kg of dimethylbenzene, putting the weighed materials and the ground pigment into a stirring tank, uniformly stirring the materials and the ground pigment, and filtering the mixture by using a 200-mesh screen to obtain the anticorrosive paint component A. Weighing 3kg of 650 polyamide resin curing agent, mixing with the component A, uniformly stirring, and spraying the coating on the surfaces of the steel rail clamp plate subjected to sand blasting and the fastener bolt, nut and gasket thereof by adopting a spraying mode. Two spraying passes are carried out, the spraying interval of each spraying pass is 15min, the thickness of the first coating is 40 mu m, and the thickness of the second coating is 20 mu m. And (3) placing the sprayed member in a room temperature environment for 20min, placing the member in a drying oven preheated to (150 +/-5) DEG C for heat preservation for 2h, taking out the member for air cooling, and thus obtaining the anticorrosive coating for the buried steel member.
In this example, the performance parameters of the corrosion protection coating are as follows:
after the tramcar rail clamp plate coated with the 60-micron anti-corrosion coating, the fastener bolt, the nut and the gasket are actually buried and operated for 1 year, the coating is intact, large-area peeling and other damages are not generated, and the steel part is effectively protected, as shown in figures 1-3. After the active coating is buried for 1 year and actually operated, the steel component is seriously corroded.
Example 2
In this example, 1kg of spherical aluminum powder with a particle size of 80 μm, 2kg of titanium dioxide powder with a particle size of 50 μm, 0.5kg of ferrophosphorus powder with a particle size of 20 μm, and 0.8kg of aluminum tripolyphosphate powder with a particle size of 5 μm were weighed, put into a grinding pulverizer, and ground at a rotation speed of 1500rpm for 6min, and then taken out. Weighing 40kg of phenyl organic silicon resin, 30kg of E51 epoxy resin and 10kg of dimethylbenzene, putting the phenyl organic silicon resin, the E51 epoxy resin and the dimethylbenzene together with the ground pigment into a stirring tank, uniformly stirring, and filtering by using a 120-mesh screen to obtain the anticorrosive paint component A. Weighing 6kg of 5772 modified polyamine, mixing with the component A, uniformly stirring, and spraying the coating on the surfaces of the steel rail clamp plate subjected to sand blasting and the fastener bolt, nut and gasket thereof by adopting a spraying mode. Two spraying passes are carried out, the spraying interval of each spraying pass is 16min, the thickness of the first coating is 50 mu m, and the thickness of the second coating is 30 mu m. And (3) placing the sprayed member in a room temperature environment for 20min, placing the member in a drying oven preheated to (150 +/-5) DEG C for heat preservation for 2.5h, taking out the member and air cooling to obtain the anticorrosive coating for the buried steel member.
In this example, the performance parameters of the corrosion protection coating are as follows:
after the tramcar rail clamping plate coated with the 80-micron anti-corrosion coating, the fastener bolt, the nut and the gasket are actually buried and operated for 1 year, the coating is intact, large-area peeling and other damages are not generated, and the steel parts are effectively protected. After the active coating is buried for 1 year and actually operated, the steel component is seriously corroded.
Example 3
In this example, 2kg of zinc powder with a particle size of 30 μm, 0.5kg of copper-chromium black powder with a particle size of 10 μm, 0.1kg of alumina powder with a particle size of 3 μm, and 3kg of floating aluminum powder with a particle size of 60 μm were weighed, put into a grinding pulverizer, ground at 4500rpm for 10min, and then taken out. Weighing 20kg of methyl organic silicon resin, 30kg of phenyl organic silicon resin, 35kg of E44 epoxy resin, 5kg of E51 epoxy resin and 8kg of dimethylbenzene, putting the components together with the ground pigment into a stirring tank, uniformly stirring, and filtering by using a 150-mesh screen to obtain the anticorrosive coating component A. Weighing 6kg of 5772 epoxy resin curing agent, mixing with the component A, uniformly stirring, and spraying the coating on the surfaces of the steel rail clamp plate subjected to sand blasting treatment and the fastener bolt, nut and gasket thereof by adopting a spraying mode. The coating thickness is 80 mu m after one spraying. And (3) placing the sprayed member in a room temperature environment for 15min, placing the member in a drying oven preheated to (150 +/-5) DEG C for heat preservation for 3h, taking out the member for air cooling, and thus obtaining the anticorrosive coating for the buried steel member.
In this example, the performance parameters of the corrosion protection coating are as follows:
after the tramcar rail clamping plate coated with the 80-micron anti-corrosion coating, the fastener bolt, the nut and the gasket are actually buried and operated for 1 year, the coating is intact, large-area peeling and other damages are not generated, and the steel parts are effectively protected. After the active coating is buried for 1 year and actually operated, the steel component is seriously corroded.
Example 4
In this example, 2kg of ferrophosphorus powder having a particle size of 5 μm, 0.5kg of zinc powder having a particle size of 10 μm, and 0.2kg of titanium dioxide powder having a particle size of 20 μm were weighed, put into a mill pulverizer, and ground at a rotation speed of 5000rpm for 6min, and then taken out. 30kg of methyl organic silicon resin, 5kg of E44 epoxy resin, 5kg of E51 epoxy resin and 2kg of dimethylbenzene are weighed, and the weighed methyl organic silicon resin, the E44 epoxy resin, the E51 epoxy resin and the 2kg of dimethylbenzene are put into a stirring tank together with the ground pigment and are stirred uniformly, and then the mixture is filtered by a 400-mesh screen to obtain the anticorrosive paint component A. Weighing 2.5kg of diethylamine curing agent, mixing with the component A, stirring uniformly, and spraying the coating on the surfaces of the steel rail clamp plate subjected to sand blasting treatment and the fastener bolt, nut and gasket thereof by adopting a spraying mode. And (3) three spraying steps, wherein the spraying interval of each spraying step is 10min, the thickness of the first coating is 50 mu m, the thickness of the second coating is 40 mu m, and the thickness of the third coating is 30 mu m. And (3) placing the sprayed member in a room temperature environment for 15min, placing the member into a drying oven preheated to (150 +/-5) DEG C, preserving the heat for 2.5h, taking out the member, and air-cooling the member to obtain the anticorrosive coating for the buried steel member.
In this example, the performance parameters of the corrosion protection coating are as follows:
after the tramcar rail clamp plate coated with the 120-micron anti-corrosion coating, the fastener bolt, the nut and the gasket are actually buried and operated for 1 year, the coating is intact, the damages such as large-area peeling and the like do not occur, and the steel part is effectively protected. After the active coating is buried for 1 year and actually operated, the steel component is seriously corroded.
Example 5
In this example, 3kg of fibrous aluminum powder having a particle size of 70 μm, 0.4kg of aluminum tripolyphosphate powder having a particle size of 40 μm, 1.5kg of ferrophosphorus powder having a particle size of 30 μm, and 2kg of titanium dioxide powder having a particle size of 50 μm were weighed, put into a grinding pulverizer, and ground at a rotation speed of 2100rpm for 6min, and then taken out. Weighing 30kg of methyl organic silicon resin, 20kg of phenyl organic silicon resin, 15kg of E44 epoxy resin and 2kg of dimethylbenzene, putting the weighed materials and the ground pigment into a stirring tank, uniformly stirring, and filtering by using a 120-mesh screen to obtain the component A of the anticorrosive paint. Weighing 3kg of ethylenediamine curing agent, mixing with the component A, uniformly stirring, and spraying the coating on the surfaces of the steel rail clamp plate subjected to sand blasting and the fastener bolt, nut and gasket thereof by adopting a spraying mode. Two spraying passes are carried out, the spraying interval of each spraying pass is 15min, the thickness of the first coating is 40 mu m, and the thickness of the second coating is 30 mu m. And (3) placing the sprayed member in a room temperature environment for 12min, then placing the member into a drying oven preheated to (150 +/-5) DEG C for heat preservation for 2h, and then taking out the member for air cooling to obtain the anticorrosive coating for the buried steel member.
In this example, the performance parameters of the corrosion protection coating are as follows:
after the tramcar rail clamp plate coated with the 70-micron anti-corrosion coating, the fastener bolt, the nut and the gasket are actually buried and operated for 1 year, the coating is intact, the damages such as large-area peeling and the like do not occur, and the steel parts are effectively protected. After the active coating is buried for 1 year and actually operated, the steel component is seriously corroded.
Example 6
In this example, 3kg of the floating aluminum powder with a particle size of 20 μm and 2kg of the zinc powder with a particle size of 30 μm were weighed, put into a grinding pulverizer, ground at 550rpm for 5min, and then taken out. Weighing 25kg of phenyl organic silicon resin, 10kg of E44 epoxy resin and 4kg of dimethylbenzene, putting the phenyl organic silicon resin, the E44 epoxy resin and the dimethylbenzene together with the ground pigment into a stirring tank, uniformly stirring, and filtering by using a 200-mesh screen to obtain the anticorrosive paint component A. Weighing 1.2kg of 5772 epoxy resin curing agent, mixing with the component A, uniformly stirring, and spraying the coating on the surfaces of the steel rail clamp plate subjected to sand blasting treatment, the fastener bolt, the nut and the gasket by adopting a spraying mode. Two spraying passes are carried out, the spraying interval of each spraying pass is 12min, the thickness of the first coating is 50 mu m, and the thickness of the second coating is 25 mu m. And (3) placing the sprayed member in a room temperature environment for 11min, placing the member in a drying oven preheated to (150 +/-5) DEG C for heat preservation for 3h, taking out the member and air cooling to obtain the anticorrosive coating for the buried steel member.
In this example, the performance parameters of the corrosion protection coating are as follows:
after the tramcar rail clamp plate coated with the 75-micrometer anti-corrosion coating, the fastener bolt, the nut and the gasket are actually buried and operated for 1 year, the coating is intact, the damages such as large-area peeling and the like do not occur, and the steel parts are effectively protected. After the active coating is buried for 1 year and actually operated, the steel component is seriously corroded.
The results of the examples show that the protective coating technology obtained by the process has excellent corrosion resistance, is easy to control and is suitable for industrial production.
The above mentioned are only preferred embodiments of the present invention, and the scope of the present invention is not limited by this, and the anticorrosive coating is used for steel materials such as weathering steel and carbon steel for underground tram members, and can also be used for steel materials and non-ferrous metal products for underground use in petroleum, chemical, electric and other industries. Therefore, other changes and modifications can be made according to the technical scheme and the technical idea of the invention, and the changes and modifications still fall within the protection scope covered by the invention.
Claims (1)
1. A preparation method of an anti-corrosion coating for a buried steel member is characterized in that 2kg of zinc powder with the particle size of 10 microns, 1kg of floating aluminum powder with the particle size of 50 microns and 0.2kg of mica powder with the particle size of 50 microns are weighed, put into a grinding pulverizer and ground for 8min at the rotating speed of 2500rpm and then taken out; weighing 30kg of methyl organic silicon resin, 15kg of E44 epoxy resin and 5kg of dimethylbenzene, putting the methyl organic silicon resin, the E44 epoxy resin and the dimethylbenzene together with the ground pigment into a stirring tank, uniformly stirring, and filtering by using a 200-mesh screen to obtain an anticorrosive coating component A; weighing 3kg of 650 polyamide resin curing agent, mixing with the component A, uniformly stirring, and spraying the coating on the surfaces of the steel rail clamp plate subjected to sand blasting and the fastener bolt, nut and gasket thereof by adopting a spraying mode; spraying twice, wherein the interval between each spraying is 15min, the thickness of the first coating is 40 mu m, and the thickness of the second coating is 20 mu m; and (3) placing the sprayed member in a room temperature environment for 20min, placing the member into a drying oven preheated to 150 +/-5 ℃, keeping the temperature for 2h, taking out the member, and air-cooling the member to obtain the anticorrosive coating for the buried steel member.
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| CN201710887293.3A CN107513348B (en) | 2017-09-27 | 2017-09-27 | Anticorrosive paint for buried steel member and preparation method and application thereof |
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| CN107513348B true CN107513348B (en) | 2020-04-03 |
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| EP4205867A1 (en) * | 2020-08-28 | 2023-07-05 | Chugoku Marine Paints, Ltd. | Paint composition, coating film, base material with coating film, and method for manufacturing same |
| EP4036175A1 (en) * | 2021-01-27 | 2022-08-03 | Sika Technology Ag | Corrosion protection coating with high thermal shock resistance |
| CN116265544A (en) * | 2021-12-16 | 2023-06-20 | 中国石油天然气股份有限公司 | Underground high-temperature-resistant anti-corrosion coating, and preparation method and application method thereof |
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| CN102372992B (en) * | 2010-08-18 | 2013-09-18 | 马敏 | Anticorrosive coating and preparation method thereof |
| CN101935497A (en) * | 2010-09-21 | 2011-01-05 | 中国人民解放军国防科学技术大学 | Epoxy modified high-temperature-resistant anticorrosive paint |
| CN101935498B (en) * | 2010-09-25 | 2012-10-17 | 江门市制漆厂有限公司 | Heat-resisting organic silicon antiseptic inner tank coating |
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