CN113637386A - Anticorrosive paint for electric power iron tower and preparation method thereof - Google Patents
Anticorrosive paint for electric power iron tower and preparation method thereof Download PDFInfo
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- CN113637386A CN113637386A CN202110932322.XA CN202110932322A CN113637386A CN 113637386 A CN113637386 A CN 113637386A CN 202110932322 A CN202110932322 A CN 202110932322A CN 113637386 A CN113637386 A CN 113637386A
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
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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
- C09D5/18—Fireproof paints including high temperature resistant paints
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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
- 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
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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
- 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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- C—CHEMISTRY; METALLURGY
- 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
- C08K2003/2237—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
- C08K2201/00—Specific properties of additives
- C08K2201/001—Conductive additives
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- C—CHEMISTRY; METALLURGY
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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Abstract
The invention discloses an anticorrosive paint for an electric power iron tower and a preparation method thereof, wherein the anticorrosive paint comprises the following components in parts by weight: 40-200 parts of epoxy resin, 20-100 parts of curing agent, 20-50 parts of ternary nano composite filler, 10-20 parts of talcum powder, 10-50 parts of solvent, 0.2-2 parts of dispersing agent, 0.2-2 parts of defoaming agent, 0.2-2 parts of silane coupling agent, 1-10 parts of flatting agent, 1-10 parts of heat-resistant agent and 0.1-1 part of anti-settling agent. The anticorrosive coating disclosed by the invention is excellent in corrosion resistance and stability; meanwhile, the coating adopts a plurality of coating additives such as a coupling agent, a defoaming agent and the like, and through the mutual synergistic effect of the components, the corrosion resistance of the coating is improved, and simultaneously, the surface tension is reduced, and the adhesion of the coating, acid and alkali resistance, high and low temperature resistance, chemical corrosion resistance and other comprehensive performances are improved.
Description
Technical Field
The invention relates to an anticorrosive paint for an electric power iron tower and a preparation method thereof, belonging to the technical field of electric power iron tower corrosion prevention.
Background
The electric iron tower of the power transmission line is an important facility of a transformer substation, the demand for electric power is gradually increased along with the high-speed development of the national electric power industry, and the guarantee of safe and reliable electric power supply is of great importance. However, the electric tower is mostly made of steel materials and is corroded and damaged by various kinds of wind, sand, rain, acid rain and the like all the year round, so that the corrosion phenomenon is very serious, great economic loss is caused, and production resources are seriously wasted. The existing mature anti-corrosion technology for metal equipment includes protective coating, corrosion inhibitor addition and sacrificial cathodic protection. The protection method for coating the protective coating is the most widely applied corrosion prevention technology because of the advantages of being most economical, convenient, effective and the like.
The anticorrosive coating taking the epoxy resin as the film forming matrix has the advantages of strong adhesive force, low pollution, strong corrosion resistance, economy and easinessThe epoxy resin has the characteristics of easy generation of holes when high polymers such as epoxy resin are used as anticorrosive paint, certain permeability and easy generation of corrosive media (water, oxygen and cl)-) Penetrating to the metal surface, thereby accelerating the corrosion rate of the metal; and the flexibility and the acid and alkali resistance of the tower are poor, so that the corrosion prevention requirement of the environment where the electric tower is located is difficult to meet.
Disclosure of Invention
Based on the above, the invention provides an anticorrosive coating for an electric power iron tower and a preparation method thereof, so as to solve the technical problem that the existing epoxy resin cannot meet the anticorrosive requirement of the electric power iron tower.
The technical scheme of the invention is as follows: an anticorrosive paint for an electric power iron tower comprises the following components in parts by weight:
40-200 parts of epoxy resin, 20-100 parts of curing agent, 20-50 parts of ternary nano composite filler, 10-20 parts of talcum powder, 10-50 parts of solvent, 0.2-2 parts of dispersing agent, 0.2-2 parts of defoaming agent, 0.2-2 parts of silane coupling agent, 1-10 parts of flatting agent, 1-10 parts of heat-resistant agent and 0.1-1 part of anti-settling agent.
Optionally, the anticorrosive paint comprises the following components in parts by weight:
100 parts of epoxy resin, 50 parts of curing agent, 35 parts of ternary nano composite filler, 15 parts of talcum powder, 30 parts of solvent, 0.5 part of dispersing agent, 1 part of defoaming agent, 1 part of silane coupling agent, 5 parts of flatting agent, 5 parts of heat-resistant agent and 5 parts of anti-settling agent.
Optionally, the epoxy resin is one or two of bisphenol a epoxy resin and bisphenol F epoxy resin.
Optionally, the curing agent is one or a mixture of two of an amine curing agent and a phenolic curing agent.
Optionally, the preparation method of the ternary nanocomposite filler comprises the following steps: the graphene oxide/titanium dioxide/polyaniline/graphene oxide/titanium dioxide/graphene oxide/titanium dioxide/polyaniline/graphene oxide/titanium dioxide/polyaniline composite material is prepared by oxidative polymerization.
Optionally, the aniline is 2-4 parts, the graphene oxide is 0.1-0.8 part, and the titanium dioxide is 1-8 parts by weight.
Optionally, the solvent is one or more of xylene, n-butanol and acetone.
Optionally, the heat-resistant agent is a mixture of N-phenylmaleimide and dimethyl tetrachloroterephthalate, wherein the molar ratio of N-phenylmaleimide: the weight ratio of the tetrachloro terephthalic acid dimethyl ester is 4: 6.
Optionally, the dispersant is one or more of fatty acid, paraffin and metal soap dispersant.
Optionally, the defoaming agent is a silicone defoaming agent.
Optionally, the leveling agent is one or more of an acrylic leveling agent, an organic silicon leveling agent and a fluorocarbon leveling agent.
Optionally, the anti-settling agent is one or more of organic bentonite and N-methyl pyrrolidone.
The invention also provides a preparation method of the anticorrosive paint for the electric power iron tower, which comprises the following steps:
1) preparation of coating A component
Weighing ternary nano composite filler, talcum powder, solvent and dispersant according to a formula, and uniformly mixing;
weighing epoxy resin, adding the epoxy resin into the mixed system, and uniformly stirring and dispersing;
weighing a defoaming agent, a silane coupling agent, a leveling agent, a heat-resistant agent and an anti-settling agent, adding the weighed materials into the mixed system, and stirring to uniformly disperse the materials to obtain a coating A component;
2) preparation of anticorrosive paint for electric power iron tower
And adding a curing agent serving as a coating B component into the coating A component, and uniformly mixing to obtain the anticorrosive coating for the electric power iron tower.
The invention has the beneficial effects that: the coating utilizes the functional nano composite particles which combine the special lamellar structure and excellent conductivity of graphene oxide, the slow-release shielding effect of polyaniline, the photo-induced cathodic protection effect of nano titanium dioxide particles and the filling effect to modify the corrosion resistance efficiency of epoxy resin, and has excellent corrosion resistance and stability; meanwhile, the coating adopts a plurality of coating additives such as a coupling agent, a defoaming agent and the like, and through the mutual synergistic effect of the components, the corrosion resistance of the coating is improved, and simultaneously, the surface tension is reduced, and the adhesion of the coating, acid and alkali resistance, high and low temperature resistance, chemical corrosion resistance and other comprehensive performances are improved.
Drawings
FIG. 1 is a graph showing the corrosion prevention effect of the coating according to the present invention;
FIG. 2 is a graph showing the corrosion prevention effect of the epoxy resin coating without the additive.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example 1
1) Preparation of ternary nanocomposite Filler
Preparing graphene oxide by using graphite as a raw material through a modified Hummers method; and (2) doping 0.1g of graphene oxide and 1g of titanium dioxide by using 2g of aniline as a monomer, and preparing the ternary nano composite filler through oxidative polymerization.
2) Preparation of coating A component
Weighing 20g of ternary nano composite filler particles, 10g of talcum powder, 10g of solvent and 0.2g of dispersant, adding into a container, stirring at a medium-low speed for 60min, and uniformly dispersing;
adding 40g of epoxy resin into the mixed system, quickly stirring for 120min, and uniformly mixing;
0.2g of defoaming agent, 0.2g of silane coupling agent, 1g of flatting agent, 1g of heat-resistant agent and 1g of anti-settling agent are added into the mixed system, and the mixture is quickly stirred for 30min to obtain the component A after being uniformly mixed.
3) Preparation of anticorrosive paint for electric power iron tower
And adding 20g of curing agent serving as a coating B component into the coating A component, stirring for 30min, and uniformly mixing to obtain the anticorrosive coating for the electric power iron tower.
Example 2
1) Preparation of ternary nanocomposite Filler
Preparing graphene oxide by using graphite as a raw material through a modified Hummers method; 3g of aniline is used as a monomer, 0.3g of graphene oxide and 6g of titanium dioxide are doped, and the ternary nano composite filler is prepared through oxidative polymerization.
2) Preparation of coating A component
Weighing 35g of ternary nano composite filler particles, 15g of talcum powder, 30g of solvent and 0.5g of dispersing agent, adding into a container, stirring at a medium-low speed for 90min, and uniformly dispersing;
adding 100g of epoxy resin into the mixed system, quickly stirring for 150min, and uniformly mixing;
and adding 1g of defoaming agent, 1g of silane coupling agent, 5g of flatting agent, 5g of heat-resistant agent and 5g of anti-settling agent into the mixed system, and quickly stirring for 60min to uniformly mix the components to obtain the component A.
3) Preparation of anticorrosive paint for electric power iron tower
And adding 50g of curing agent serving as a coating B component into the coating A component, stirring for 60min, and uniformly mixing to obtain the anticorrosive coating for the electric power iron tower.
Example 3
1) Preparation of ternary nanocomposite Filler
Preparing graphene oxide by using graphite as a raw material through a modified Hummers method; and 4g of aniline is used as a monomer, 0.8g of graphene oxide and 8g of titanium dioxide are doped, and the ternary nano composite filler is prepared through oxidative polymerization.
2) Preparation of coating A component
Weighing 50g of ternary nano-composite filler particles, 20g of talcum powder, 50g of solvent and 2g of dispersant, adding into a container, stirring at a medium-low speed for 120min, and uniformly dispersing;
adding 150g of epoxy resin into the mixed system, quickly stirring for 80min, and uniformly mixing;
and adding 2g of defoaming agent, 2g of silane coupling agent, 10g of flatting agent, 10g of heat-resistant agent and 10g of anti-settling agent into the mixed system, and quickly stirring for 120min to uniformly mix the components to obtain the component A.
3) Preparation of anticorrosive paint for electric power iron tower
And adding 100g of curing agent serving as a coating B component into the coating A component, stirring for 120min, and uniformly mixing to obtain the anticorrosive coating for the electric power iron tower.
In the embodiment of the invention, the epoxy resin is bisphenol A epoxy resin, the solvent is dimethylbenzene, the curing agent is ethylenediamine, the anti-settling agent is N-methylpyrrolidone, and the heat-resistant agent is a mixture of N-phenylmaleimide and dimethyl tetrachloroterephthalate, wherein the weight ratio of N-phenylmaleimide: the weight ratio of the tetrachloro terephthalic acid dimethyl ester is 4: 6; the talcum powder, the dispersing agent, the flatting agent, the defoaming agent, the anti-settling agent and the silane coupling agent are all conventional formulations.
The preparation method of the ternary nano composite filler comprises the following steps: firstly, mixing graphene oxide with a dilute hydrochloric acid (with the concentration of 6mol/L), dispersing to obtain a uniform graphene oxide dispersion liquid, transferring the graphene oxide dispersion liquid into a container, and stirring at 0 ℃; then adding titanium dioxide into the reaction system, and stirring at 0 ℃ to uniformly mix the titanium dioxide with the graphene oxide dispersion liquid; adding aniline into the reaction system, and stirring at 0 ℃ to uniformly mix the aniline with the graphene oxide/titanium dioxide dispersion liquid; dissolving ammonium persulfate in dilute hydrochloric acid (with the concentration of 6mol/L) to fully dissolve the ammonium persulfate, slowly dropwise adding the ammonium persulfate into the solution, and reacting at 0 ℃; after the reaction is finished, washing the product with ethanol and water, and finally drying and grinding at 60 ℃ to obtain the ternary nano composite material.
And (3) testing the corrosion resistance:
the modified epoxy resin paints according to examples 1 to 3 of the present invention were coated on the surface of Q235A, and pure EP (epoxy resin) was coated on the surface of Q235A as a control, and the photoelectrochemical properties of the prepared samples were characterized using CHI760E electrochemical workstation of the shanghai chenhua company. The electrochemical analyzer is a three-electrode system, saturated calomel is used as a reference electrode, a platinum sheet is used as a counter electrode, a self-made Q235 carbon steel electrode is used as a working electrode, and 3.5% NaCl is used as an electrolyte. Before the test, the Q235 carbon steel electrode is soaked in 3.5% NaCl solution for 2 hours, and the test is started after the open-circuit voltage is stabilized. At 10-2-105Testing the alternating current impedance at an open circuit voltage with an amplitude of 0.05V in the Hz range; the polarization test was performed at a scan speed of 10mv/s in a range of 500mv above and below the open circuit voltage.
TABLE 1 results of electrochemical polarization testing of pure EP coatings and composite coatings of the invention
Table 1 shows that the corrosion potential of the modified epoxy resin coating prepared by the invention is increased from-0.743V to-0.434V, and the corrosion current is increased from 3.542X 10-5A/cm2Reduced to 1.113 × 10-5A/cm2Surface resistance of 956.8ohms/cm2Raised to 5835.8ohms/cm2So that the corrosion prevention efficiency is improved to 83.60 percent.
After a period of time, observing the coating effects of the embodiment 1 and the epoxy resin coating, wherein fig. 1 is a graph of the corrosion prevention effect of the coating of the invention, and fig. 2 is a graph of the corrosion prevention effect of the epoxy resin coating without the additive, it can be seen that the coating in fig. 2 generates a large amount of pores after a period of time, which results in poor corrosion prevention effect, while the corrosion prevention coating of the invention is relatively dense and does not generate pores. According to the analysis of the applicant, the coating utilizes the special lamellar structure and excellent conductivity of graphene oxide, the slow-release shielding effect of polyaniline, the photo-induced cathode protection effect of nano titanium dioxide particles and the functional nano composite particles combined with the filling effect to modify the corrosion resistance efficiency of the epoxy resin, and has excellent corrosion resistance and stability; meanwhile, the coating adopts a plurality of coating additives such as a coupling agent, a defoaming agent and the like, and through the mutual synergistic effect of the components, the corrosion resistance of the coating is improved, and simultaneously, the surface tension is reduced, and the adhesion of the coating, acid and alkali resistance, high and low temperature resistance, chemical corrosion resistance and other comprehensive performances are improved.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The anticorrosive paint for the electric power iron tower is characterized by comprising the following components in parts by weight:
40-200 parts of epoxy resin, 20-100 parts of curing agent, 20-50 parts of ternary nano composite filler, 10-20 parts of talcum powder, 10-50 parts of solvent, 0.2-2 parts of dispersing agent, 0.2-2 parts of defoaming agent, 0.2-2 parts of silane coupling agent, 1-10 parts of flatting agent, 1-10 parts of heat-resistant agent and 0.1-1 part of anti-settling agent.
2. The anticorrosive paint for the electric iron tower according to claim 1, characterized by comprising the following components in parts by weight:
100 parts of epoxy resin, 50 parts of curing agent, 35 parts of ternary nano composite filler, 15 parts of talcum powder, 30 parts of solvent, 0.5 part of dispersing agent, 1 part of defoaming agent, 1 part of silane coupling agent, 5 parts of flatting agent, 5 parts of heat-resistant agent and 5 parts of anti-settling agent.
3. The anticorrosive paint for the electric power iron tower according to claim 1, wherein the epoxy resin is one or a mixture of two of bisphenol A type epoxy resin and bisphenol F type epoxy resin.
4. The anticorrosive paint for the electric power iron tower according to claim 1, wherein the curing agent is one or a mixture of an amine curing agent and a phenolic curing agent.
5. The anticorrosive paint for the electric iron tower as claimed in claim 1, wherein the ternary nanocomposite filler is prepared by a method comprising the following steps: the graphene oxide/titanium dioxide/polyaniline/graphene oxide/titanium dioxide/graphene oxide/titanium dioxide/polyaniline/graphene oxide/titanium dioxide/polyaniline composite material is prepared by oxidative polymerization.
6. The anticorrosive paint for the electric iron tower according to claim 5, wherein the aniline is 2-4 parts, the graphene oxide is 0.1-0.8 part, and the titanium dioxide is 1-8 parts by weight.
7. The anticorrosive paint for the electric power iron tower according to claim 1, wherein the solvent is one or more of xylene, n-butanol and acetone.
8. The anticorrosive paint for electric power towers according to claim 1, wherein the heat-resistant agent is a mixture of N-phenylmaleimide and dimethyl tetrachloroterephthalate, wherein the molar ratio of N-phenylmaleimide: the weight ratio of the tetrachloro terephthalic acid dimethyl ester is 4: 6.
9. The anticorrosive paint for the electric power iron tower as claimed in claim 1, wherein the dispersant is one or more of fatty acid, paraffin, and metal soap dispersant.
10. The preparation method of an anticorrosive paint for electric power iron towers according to any one of claims 1 to 9, characterized by comprising the following steps:
1) preparation of coating A component
Weighing ternary nano composite filler, talcum powder, solvent and dispersant according to a formula, and uniformly mixing;
weighing epoxy resin, adding the epoxy resin into the mixed system, and uniformly stirring and dispersing;
weighing a defoaming agent, a silane coupling agent, a leveling agent, a heat-resistant agent and an anti-settling agent, adding the weighed materials into the mixed system, and stirring to uniformly disperse the materials to obtain a coating A component;
2) preparation of anticorrosive paint for electric power iron tower
And adding a curing agent serving as a coating B component into the coating A component, and uniformly mixing to obtain the anticorrosive coating for the electric power iron tower.
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