CN110713793A - Nano modified anticorrosive paint for power transmission and transformation lines and preparation method thereof - Google Patents
Nano modified anticorrosive paint for power transmission and transformation lines and preparation method thereof Download PDFInfo
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- 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
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- 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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Abstract
The invention discloses a nano modified anticorrosive coating for a power transmission and transformation circuit and a preparation method thereof, belonging to the technical field of electric power corrosion prevention. A nano modified anticorrosive paint for power transmission and transformation lines is composed of the following raw materials in parts by weight: 50-80 parts of epoxy modified organic silicon resin, 5-10 parts of nano magnesium oxide, 5-15 parts of coupling agent, 5-12 parts of curing agent, 30-50 parts of compound diluent, 4-10 parts of red lead, 2-5 parts of aluminum silicate and 1-6 parts of auxiliary agent. The nano modified anticorrosive coating for the power transmission and transformation line has good temperature change resistance and weather resistance.
Description
Technical Field
The invention relates to the technical field of electric power corrosion prevention, in particular to a nano modified anticorrosive coating for a power transmission and transformation line and a preparation method thereof.
Background
In the prior art, corrosion prevention measures mainly adopt technologies such as a corrosion-resistant coating layer and electroplating, a layer of corrosion-resistant coating material is coated on the outer surface of steel of the power transmission and transformation equipment, a hot galvanizing technology is generally adopted for power transmission and transformation corrosion prevention, however, the corrosion resistance of the domestic galvanized coating is poor, the service life is short, the process is lagged behind, the requirements of the existing power transmission and transformation equipment cannot be met, the corrosion resistance of the power transmission and transformation equipment is reduced, and the safe operation of a power system is threatened.
The nano material is a special chemical material, has excellent chemical property and strong electric conductivity, so the nano material can be widely used in the coating of power transmission and transformation equipment to enhance the comprehensive performance of the coating and ensure the normal operation of the power transmission equipment, but the nano material is applied to the coating, has poor dispersibility, has poor performance and cannot meet the requirements of the current power transmission and transformation equipment, so the nano material and the traditional coating need to be combined to design a novel preparation method of the coating.
Patent document with publication number CN105400314A discloses a corrosion-resistant fluorocarbon resin coating, which comprises the following raw materials in parts by weight: 30-50 parts of FEVE fluorocarbon resin, 20-45 parts of aliphatic epoxy resin, 20-40 parts of acrylic acid modified alkyd resin, 5-15 parts of bentonite, 5-12 parts of magnesium silicate, 10-20 parts of modified kaolin, 2-8 parts of hollow glass beads, 2-8 parts of graphene, 10-18 parts of melamine resin, 2-7 parts of 2-amino-2-methyl-1-propanol, 5-10 parts of methyl cellulose, 1-3 parts of anionic polyacrylamide, 2-7 parts of IPDI isocyanate curing agent, 1-1.8 parts of polydimethylsiloxane, 2-8 parts of butyl acetate, 1-10 parts of propylene glycol, 2-8 parts of dimethyl valerate, 1-4 parts of wetting agent, 1-3 parts of preservative and 30-60 parts of water. The invention has good adhesive force and excellent corrosion resistance. The weather resistance of the fluorocarbon coating needs to be further improved, the variety of materials is multiple, and the performance stability of the product is not easy to control.
Patent document with publication number CN106675354A discloses an anticorrosive coating for electric power towers, which belongs to the field of anticorrosive coatings. The composite material mainly comprises the following raw materials in parts by weight: 28-30 parts of nano magnetic iron oxide, 10-12 parts of inert diluent, 18-20 parts of alkyd resin, 10-11 parts of polyvinyl alcohol, 7-9 parts of ethyl acetate, 1.25 parts of dispersing agent, 14-15 parts of acetone, 18-19 parts of methyl isobutyl ketone and 1-1.5 parts of tributyl phosphate. The temperature change resistance of the anticorrosive coating for the electric power tower is poor, and the weather resistance needs to be improved.
Disclosure of Invention
In view of the above, the technical problem to be solved by the present invention is to provide a nano modified anticorrosive coating for power transmission and transformation lines to significantly improve the temperature change resistance and weather resistance of the coating, aiming at the defects of the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a nano modified anticorrosive paint for power transmission and transformation lines is composed of the following raw materials in parts by weight: 50-80 parts of epoxy modified organic silicon resin, 5-10 parts of nano magnesium oxide, 5-15 parts of coupling agent, 5-12 parts of curing agent, 30-50 parts of compound diluent, 4-10 parts of red lead, 2-5 parts of aluminum silicate and 1-6 parts of auxiliary agent.
Preferably, the nano modified anticorrosive coating for the power transmission and transformation line is composed of the following raw materials in parts by weight: 60-70 parts of epoxy modified organic silicon resin, 6-8 parts of nano magnesium oxide, 8-12 parts of coupling agent, 6-8 parts of curing agent, 35-45 parts of compound diluent, 6-8 parts of red lead, 3-4 parts of aluminum silicate and 2-4 parts of auxiliary agent.
Preferably, the nano modified anticorrosive coating for the power transmission and transformation line is composed of the following raw materials in parts by weight: 65 parts of epoxy modified organic silicon resin, 7 parts of nano magnesium oxide, 10 parts of coupling agent, 8 parts of curing agent, 40 parts of compound diluent, 7 parts of red lead, 3 parts of aluminum silicate and 3 parts of auxiliary agent.
Preferably, the coupling agent is titanate coupling agent, and the curing agent is one or a combination of polyamide curing agent and diethylenetriamine.
Preferably, the weight ratio of the polyamide curing agent to diethylenetriamine is (2.0-3.5): 1.
preferably, the compound diluent is a composition of ethyl orthosilicate and n-butanol, and the mass ratio of the ethyl orthosilicate to the n-butanol is (1.2-2.5): 1.
Preferably, the auxiliary agent is one or a composition of more than two of xanthan gum, fatty acid polyglycol ester, a defoaming agent and a leveling agent, and the mass ratio of the xanthan gum to the fatty acid polyglycol ester to the defoaming agent to the leveling agent is (3-5) to (2-2.5): (2-4):1.
Preferably, the preparation method of the nano modified anticorrosive coating for the power transmission and transformation line comprises the following steps:
step S1: weighing nano magnesium oxide powder, adding an ethanol solution, and dispersing at high speed for 45-60 minutes under an ultrasonic condition to prepare a suspension with the mass fraction of 4-5.3%; adding part of coupling agent, dispersing at 2000-;
step S2: adding the modified nano magnesium oxide powder into a compound diluent, uniformly mixing, sequentially adding epoxy modified organic silicon resin, red lead and aluminum silicate, and performing ball milling dispersion in a ball mill for 10-15min to obtain an emulsion;
step S3: adding an auxiliary agent and a curing agent into the emulsion, ultrasonically dispersing for 8-12min at 60 ℃, then dispersing for 50-60min by using a high-speed shearing mixing emulsifying machine, and standing for 20-24 h to obtain a product.
Preferably, the frequency of the ultrasound in step S1 is 23-25kHz, and the power is 250-350W.
Preferably, the rotation speed of the high-speed dispersion in step S1 is 4500-5000 rpm.
The power transmission and transformation equipment is mostly located the open air, receives the easy corruption of influence such as external environment and self running condition, because operating condition's restriction, most power transmission and transformation equipment all adopts the mode of coating anticorrosive paint to protect, but practice discovers that many kinds of anticorrosive paint is not good at power transmission and transformation equipment's long-term performance, shows: the coating is easy to yellow, easy to pulverize, not resistant to temperature change, easy to age and the like, and the influence factors of power transmission and transformation equipment are complex, so that systematic research on the defects is lacked at present, and therefore, the development of the anticorrosive coating with more ideal effect is more difficult. Currently, the fusion preparation of coatings from modified resins and nanoparticles is of interest to the industry based on the structural characteristics and related effects of the nanoparticles. The existing research shows that the addition of the nano particles is expected to change the problems faced by the anticorrosive coating, but the corrosion resistance of the coating is reduced on the contrary because the nano particles are easy to agglomerate and are difficult to uniformly disperse. Therefore, it is extremely difficult to maintain and improve the corrosion resistance of the conventional anticorrosive coatings while solving the above-mentioned problems. Through continuous research and exploration of years of tests and practices, the technical group finally prepares the power transmission and transformation line nano modified anticorrosive coating, realizes the comprehensive improvement of the performance of the coating, overcomes the problem that nano particles are difficult to fuse with epoxy modified organic silicon resin, and obviously improves the temperature change resistance and weather resistance of the coating.
Compared with the prior art, the invention has the following beneficial effects:
1) the invention provides a nano modified anticorrosive coating for power transmission and transformation lines, which comprises the following components in percentage by weight: the epoxy modified organic silicon resin integrates the excellent characteristics of epoxy resin and organic silicon resin, and has good mechanical property, stability and high and low temperature resistance; the nano magnesium oxide is white powder, tasteless and nontoxic, has small particle size, large specific surface area and higher optical, electric, magnetic and chemical properties, is preferably selected, and plays an important role in improving the corrosion resistance and the temperature change resistance of the coating through reasonable modification; the two ends of the titanate coupling agent have functional groups with different properties, so that the compatibility of the nano magnesium oxide and the epoxy modified organic silicon resin can be improved, and the problems that the nano magnesium oxide is easy to agglomerate, poor in dispersity and not stable enough are solved; the curing agent enhances the adhesion property of the coating and the corrosion resistance of the coating. In addition, the invention adopts a compound diluent, preferably a composition of tetraethoxysilane and n-butyl alcohol, increases the solubility of the raw materials, reduces the viscosity of a matrix and improves the infiltration performance of the nano-magnesia; the filling material adopts red lead and aluminum silicate, the red lead is used as an antirust agent, and the paint prepared by the red lead has strong adhesive force and quite high stability in the atmosphere; the aluminum silicate has high refraction performance and good light transmission performance, gives better flexibility and appearance characteristics to the coating, and ensures that the coating is not easy to yellow; the auxiliary agent adopts xanthan gum, fatty acid polyglycol ester, defoaming agent and leveling agent, so that the stability of the coating is greatly enhanced, the workability of the coating is improved, and the weather resistance of the coating is favorably improved. In conclusion, the invention is based on the combined use of all the raw materials, so that the raw materials are uniformly dispersed, and the coating has stable performance, excellent corrosion resistance, temperature resistance and ageing resistance.
2) According to the preparation method of the nano modified anticorrosive coating for the power transmission and transformation line, firstly, nano magnesium oxide is modified, so that the dispersion performance of the nano magnesium oxide is enhanced, the dispersion stability of the nano magnesium oxide in epoxy modified organic silicon resin is improved, and a key effect on improving the performance stability of the coating is achieved; in the preparation process of the coating, the raw materials are added in batches and mixed step by step, so that the mixing uniformity of the raw materials is improved, and the obtained coating has excellent water resistance, acid and alkali resistance, strong corrosion resistance, ageing resistance and temperature change resistance, and can well meet the requirement of electric power corrosion performance.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
In the invention, epoxy modified organic silicon resin, Hubeixin Rundji chemical industry Co., Ltd, SH-023-7; polyamide curing agents, Shandong de Yuan epoxy science and technology, Inc., DJ 2421H; titanate coupling agent, chemical auxiliary oil material factory, TC-2; nanometer magnesia with average particle diameter of 50nm and specific surface area of 28m2(ii)/g; defoaming agents, environmental protection technology ltd, san zhou city view, FE-10; leveling agent, SI800 silicon-based surfactant.
Example 1
A nano modified anticorrosive paint for power transmission and transformation lines is composed of the following raw materials in parts by weight: 65 parts of epoxy modified organic silicon resin, 7 parts of nano magnesium oxide, 10 parts of coupling agent, 8 parts of curing agent, 40 parts of compound diluent, 7 parts of red lead, 3 parts of aluminum silicate and 3 parts of auxiliary agent.
Wherein: the coupling agent is titanate coupling agent TC-2, the curing agent is a composition of polyamide curing agent and diethylenetriamine, and the weight ratio of the polyamide curing agent to the diethylenetriamine is 2.7: 1.
the compound diluent is a composition of tetraethoxysilane and normal butanol, and the mass ratio of the tetraethoxysilane to the normal butanol is (1.2-2.5): 1.
The auxiliary agent is a composition of xanthan gum, fatty acid polyglycol ester, a defoaming agent and a flatting agent, and the mass ratio of the xanthan gum to the fatty acid polyglycol ester to the defoaming agent to the flatting agent is 4: 2.2: 3:1.
The preparation method of the nano modified anticorrosive paint for the power transmission and transformation line comprises the following steps:
step S1: weighing nano magnesium oxide powder, adding an ethanol solution, and dispersing at a high speed for 50 minutes under an ultrasonic condition to prepare a suspension with the mass fraction of 4.5%; adding part of coupling agent, dispersing at 2000rpm for 35 minutes, standing for 12 hours, taking the upper suspension, drying and grinding to obtain modified nano magnesium oxide powder;
step S2: adding the modified nano magnesium oxide powder into a compound diluent, uniformly mixing, sequentially adding epoxy modified organic silicon resin, red lead and aluminum silicate, and performing ball milling dispersion in a ball mill for 12min to obtain an emulsion;
step S3: adding an auxiliary agent and a curing agent into the emulsion, ultrasonically dispersing for 10min at 60 ℃, then dispersing for 55min by using a high-speed shearing mixing emulsifying machine, and standing for 24 hours to obtain a product.
The frequency of the ultrasound in step S1 was 23kHz, and the power was 300W.
The rotation speed of the high-speed dispersion in step S1 was 5000 rpm.
Example 2
A nano modified anticorrosive paint for power transmission and transformation lines is composed of the following raw materials in parts by weight: 60-70 parts of epoxy modified organic silicon resin, 6-8 parts of nano magnesium oxide, 8-12 parts of coupling agent, 6-8 parts of curing agent, 35-45 parts of compound diluent, 6-8 parts of red lead, 3-4 parts of aluminum silicate and 2-4 parts of auxiliary agent.
The curing agent is a composition of a polyamide curing agent and diethylenetriamine, and the weight ratio of the polyamide curing agent to the diethylenetriamine is 2.0: 1.
the compound diluent is a composition of tetraethoxysilane and normal butanol, and the mass ratio of the tetraethoxysilane to the normal butanol is 1.2: 1.
The auxiliary agent is a composition of xanthan gum, fatty acid polyglycol ester, a defoaming agent and a flatting agent, and the mass ratio of the xanthan gum to the fatty acid polyglycol ester to the defoaming agent to the flatting agent is 3: 2: 2:1.
The preparation method of the nano modified anticorrosive coating for the power transmission and transformation line comprises the following steps:
step S1: weighing nano magnesium oxide powder, adding an ethanol solution, and dispersing at a high speed for 45 minutes under an ultrasonic condition to prepare a suspension with the mass fraction of 5.3%; adding part of coupling agent, dispersing for 30 minutes at 2500rpm, standing for 12 hours, taking the upper suspension, drying and grinding to obtain modified nano magnesium oxide powder;
step S2: adding the modified nano magnesium oxide powder into a compound diluent, uniformly mixing, sequentially adding epoxy modified organic silicon resin, red lead and aluminum silicate, and performing ball milling dispersion in a ball mill for 10min to obtain an emulsion;
step S3: and adding an auxiliary agent and a curing agent into the emulsion, ultrasonically dispersing for 8min at 60 ℃, then dispersing for 60min by using a high-speed shearing mixing emulsifying machine, and standing for 24 hours to obtain a product.
The frequency of the ultrasound in step S1 was 25kHz, and the power was 250W.
The rotation speed of the high-speed dispersion in step S1 was 4500 rpm.
Example 3
A nano modified anticorrosive paint for power transmission and transformation lines is composed of the following raw materials in parts by weight: 60-70 parts of epoxy modified organic silicon resin, 6-8 parts of nano magnesium oxide, 8-12 parts of coupling agent, 6-8 parts of curing agent, 35-45 parts of compound diluent, 6-8 parts of red lead, 3-4 parts of aluminum silicate and 2-4 parts of auxiliary agent.
The curing agent is a composition of a polyamide curing agent and diethylenetriamine, and the weight ratio of the polyamide curing agent to the diethylenetriamine is 3.5: 1.
the compound diluent is a composition of tetraethoxysilane and normal butanol, and the mass ratio of the tetraethoxysilane to the normal butanol is 2.5: 1.
The auxiliary agent is a composition of xanthan gum, fatty acid polyglycol ester, a defoaming agent and a flatting agent, wherein the mass ratio of the xanthan gum to the fatty acid polyglycol ester to the defoaming agent to the flatting agent is 5: 2.5: 4:1.
The preparation method of the nano modified anticorrosive coating for the power transmission and transformation line comprises the following steps:
step S1: weighing nano magnesium oxide powder, adding an ethanol solution, and dispersing at a high speed for 60 minutes under an ultrasonic condition to prepare a suspension with the mass fraction of 4%; adding part of coupling agent, dispersing at 2300rpm for 35 minutes, standing for 12 hours, taking the upper suspension, drying and grinding to obtain modified nano magnesium oxide powder;
step S2: adding the modified nano magnesium oxide powder into a compound diluent, uniformly mixing, sequentially adding epoxy modified organic silicon resin, red lead and aluminum silicate, and performing ball milling dispersion in a ball mill for 15min to obtain an emulsion;
step S3: and adding an auxiliary agent and a curing agent into the emulsion, performing ultrasonic dispersion for 12min at 60 ℃, then performing dispersion for 50min by using a high-speed shearing mixing emulsifying machine, and standing for 20 hours to obtain a product.
The frequency of the ultrasound in step S1 is 24kHz and the power is 350W.
The rotation speed of the high-speed dispersion in step S1 was 4800 rpm.
Example 4
A nano modified anticorrosive paint for power transmission and transformation lines is composed of the following raw materials in parts by weight: 50 parts of epoxy modified organic silicon resin, 5 parts of nano magnesium oxide, 5 parts of coupling agent, 5 parts of curing agent, 30 parts of compound diluent, 4 parts of red lead, 2 parts of aluminum silicate and 1 part of auxiliary agent.
The curing agent is a composition of a polyamide curing agent and diethylenetriamine, and the weight ratio of the polyamide curing agent to the diethylenetriamine is 3.0: 1.
the auxiliary agent is a composition of fatty acid polyglycol ester, a defoaming agent and a flatting agent, wherein the mass ratio of the fatty acid polyglycol ester to the defoaming agent to the flatting agent is 2.1: 3.2:1.
The composition of the remaining raw materials was the same as in example 1.
The preparation method of the nano modified anticorrosive coating for the power transmission and transformation line of the embodiment refers to the embodiment 1.
Example 5
A nano modified anticorrosive paint for power transmission and transformation lines is composed of the following raw materials in parts by weight: 80 parts of epoxy modified organic silicon resin, 10 parts of nano magnesium oxide, 15 parts of coupling agent, 12 parts of curing agent, 50 parts of compound diluent, 10 parts of red lead, 5 parts of aluminum silicate and 6 parts of auxiliary agent.
The auxiliary agent is a composition of fatty acid polyglycol ester and a defoaming agent, and the mass ratio of the fatty acid polyglycol ester to the defoaming agent is 2.5: 4.
the composition of the remaining raw materials was the same as in example 1.
The preparation method of the nano modified anticorrosive coating for the power transmission and transformation line of the embodiment refers to the embodiment 1.
Example 6
A nano modified anticorrosive paint for power transmission and transformation lines is composed of the following raw materials in parts by weight: 50-80 parts of epoxy modified organic silicon resin, 5-10 parts of nano magnesium oxide, 5-15 parts of coupling agent, 5-12 parts of curing agent, 30-50 parts of compound diluent, 4-10 parts of red lead, 2-5 parts of aluminum silicate and 1-6 parts of auxiliary agent.
Wherein the curing agent is a polyamide curing agent. The composition of the remaining raw materials was the same as in example 1.
The preparation method of the nano modified anticorrosive coating for the power transmission and transformation line of the embodiment refers to the embodiment 1.
Example 7
A nano modified anticorrosive paint for power transmission and transformation lines is composed of the following raw materials in parts by weight: 55 parts of epoxy modified organic silicon resin, 6 parts of nano magnesium oxide, 7 parts of coupling agent, 6 parts of curing agent, 35 parts of compound diluent, 5 parts of red lead, 3 parts of aluminum silicate and 2 parts of auxiliary agent.
Wherein the auxiliary agent is fatty acid polyglycol ester. The composition of the remaining raw materials was the same as in example 1.
The preparation method of the nano modified anticorrosive coating for the power transmission and transformation line of the embodiment refers to the embodiment 1.
Example 8
The preparation method of the nano modified anticorrosive coating for the power transmission and transformation line of the embodiment refers to the embodiment 1.
A nano modified anticorrosive paint for power transmission and transformation lines is composed of the following raw materials in parts by weight: 70 parts of epoxy modified organic silicon resin, 9 parts of nano magnesium oxide, 13 parts of coupling agent, 10 parts of curing agent, 45 parts of compound diluent, 9 parts of red lead, 4 parts of aluminum silicate and 5 parts of auxiliary agent.
In the example, the rest raw material compositions and the preparation method of the nano modified anticorrosive paint for the power transmission and transformation circuit refer to example 1.
Comparative example 1
A nano modified anticorrosive paint for power transmission and transformation lines is composed of the following raw materials in parts by weight: 65 parts of epoxy modified organic silicon resin, 7 parts of nano magnesium oxide, 10 parts of coupling agent, 8 parts of curing agent, 40 parts of compound diluent, 7 parts of red lead, 3 parts of aluminum silicate and 3 parts of auxiliary agent.
The nano modified anticorrosive paint for power transmission and transformation circuit described in the comparative example is different from the paint described in the example 1 in that: the coupling agent is selected from aluminate coupling agent, Chongqing Jiashi technology development Co., Ltd., F-2.
Comparative example 2
A nano modified anticorrosive paint for power transmission and transformation lines is composed of the following raw materials in parts by weight: 65 parts of epoxy modified organic silicon resin, 7 parts of nano magnesium oxide, 10 parts of coupling agent, 8 parts of curing agent, 40 parts of compound diluent, 7 parts of red lead, 3 parts of aluminum silicate and 3 parts of auxiliary agent.
The nano modified anticorrosive paint for power transmission and transformation circuit described in the comparative example is different from the paint described in the example 1 in that: the nano magnesium oxide has an average particle diameter of 20nm and a specific surface area of 41m2/g。
Comparative example 3
A nano modified anticorrosive paint for power transmission and transformation lines is composed of the following raw materials in parts by weight: 65 parts of composite resin, 7 parts of nano magnesium oxide, 10 parts of coupling agent, 8 parts of curing agent, 40 parts of compound diluent, 7 parts of red lead, 3 parts of aluminum silicate and 3 parts of auxiliary agent.
The nano modified anticorrosive paint for power transmission and transformation circuit described in the comparative example is different from the paint described in the example 1 in that: the composite resin is a composition of epoxy resin and organic silicon resin, wherein,
epoxy resin, CAS No.: 61788-97-4, silicone resin, CAS: 67763-03-5.
Comparative example 4
The nano modified anticorrosive paint for power transmission and transformation circuit described in the comparative example is different from the paint described in the example 1 in that: the preparation method of the nano modified anticorrosive paint for the power transmission and transformation line comprises the following steps:
step S1: simultaneously adding nano magnesium oxide and a coupling agent into a compound diluent, uniformly mixing, performing ultrasonic dispersion for 60min, sequentially adding epoxy modified organic silicon resin, red lead and aluminum silicate, and performing ball milling dispersion for 12min in a ball mill to obtain an emulsion;
step S2: adding an auxiliary agent and a curing agent into the emulsion, ultrasonically dispersing for 10min at 60 ℃, then dispersing for 55min by using a high-speed shearing mixing emulsifying machine, and standing for 24 hours to obtain a product.
The frequency of the ultrasound in step S1 was 20kHz, and the power was 600W.
Evaluation of Effect
And spraying the prepared coating on the treated bottom plate, controlling the thickness to be 50 +/-5 microns, and then curing at room temperature, drying and testing.
① observing surface appearance, wherein the observation of the surface appearance is carried out by visual inspection;
② testing water resistance by reference to GB/T A method, visually inspecting the test board, and recording whether there is phenomena such as light loss, discoloration, bubbling, wrinkling, falling off, rusting, etc.;
③ chemical resistance test according to GB/T1763-79 (89), including salt water resistance, acid resistance, alkali resistance;
④ Artificial accelerated ageing tests are carried out according to the method specified in GB/T1865-2009 "xenon arc radiation for artificial weathering ageing and artificial radiation exposure filtration" for color paints and varnishes and GB/T16422.3-2014 "light source exposure test method for plastics laboratories part 3 fluorescent ultraviolet lamp". The evaluation of the results is carried out according to the method specified in GB/T1766-2008 "rating method for ageing of color paints and varnishes coatings";
⑤ temperature change resistance test is carried out according to 'JG/T 25-1999 building coating coating freeze-thaw resistance cycle test method', test results are evaluated according to the coating conditions of test plates, and in each group of test, at least two test plates are qualified if the test plates have no phenomena of pulverization, cracking, peeling, foaming, obvious color change and the like.
The results of the performance tests are shown in tables 1-1 and 1-2 below:
table 1-1 test results for examples 1-5
Tables 1-2 test results for comparative examples 1-4
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A nano modified anticorrosive paint for power transmission and transformation lines is characterized in that: the composition is characterized by comprising the following raw materials in parts by weight: 50-80 parts of epoxy modified organic silicon resin, 5-10 parts of nano magnesium oxide, 5-15 parts of coupling agent, 5-12 parts of curing agent, 30-50 parts of compound diluent, 4-10 parts of red lead, 2-5 parts of aluminum silicate and 1-6 parts of auxiliary agent.
2. The nano-modified anticorrosive coating for electric transmission and transformation lines according to claim 1, characterized in that: 60-70 parts of epoxy modified organic silicon resin, 6-8 parts of nano magnesium oxide, 8-12 parts of coupling agent, 6-8 parts of curing agent, 35-45 parts of compound diluent, 6-8 parts of red lead, 3-4 parts of aluminum silicate and 2-4 parts of auxiliary agent.
3. The nano-modified anticorrosive coating for electric transmission and transformation lines according to claim 2, characterized in that: 65 parts of epoxy modified organic silicon resin, 7 parts of nano magnesium oxide, 10 parts of coupling agent, 8 parts of curing agent, 40 parts of compound diluent, 7 parts of red lead, 3 parts of aluminum silicate and 3 parts of auxiliary agent.
4. The nano-modified anticorrosive coating for power transmission and transformation lines according to claim 3, characterized in that: the coupling agent is titanate coupling agent, and the curing agent is one or a composition of two of polyamide curing agent and diethylenetriamine.
5. The nano-modified anticorrosive coating for electric transmission and transformation lines according to claim 4, characterized in that: the weight ratio of the polyamide curing agent to the diethylenetriamine is (2.0-3.5): 1.
6. the nano-modified anticorrosive coating for electric transmission and transformation lines according to claim 5, characterized in that: the compound diluent is a composition of ethyl orthosilicate and n-butanol, and the mass ratio of the ethyl orthosilicate to the n-butanol is (1.2-2.5): 1.
7. The nano-modified anticorrosive coating for electric transmission and transformation lines according to claim 6, characterized in that: the auxiliary agent is one or a composition of more than two of xanthan gum, fatty acid polyglycol ester, a defoaming agent and a flatting agent, and the mass ratio of the xanthan gum to the fatty acid polyglycol ester to the defoaming agent to the flatting agent is (3-5) to (2-2.5): (2-4):1.
8. The preparation method of the nano modified anticorrosive coating for electric transmission and transformation lines according to claim 7, characterized in that: the method comprises the following steps:
step S1: weighing nano magnesium oxide powder, adding an ethanol solution, and dispersing at high speed for 45-60 minutes under an ultrasonic condition to prepare a suspension with the mass fraction of 4-5.3%; adding part of coupling agent, dispersing at 2000-;
step S2: adding the modified nano magnesium oxide powder into a compound diluent, uniformly mixing, sequentially adding epoxy modified organic silicon resin, red lead and aluminum silicate, and performing ball milling dispersion in a ball mill for 10-15min to obtain an emulsion;
step S3: adding an auxiliary agent and a curing agent into the emulsion, ultrasonically dispersing for 8-12min at 60 ℃, then dispersing for 50-60min by using a high-speed shearing mixing emulsifying machine, and standing for 20-24 h to obtain a product.
9. The preparation method of the nano modified anticorrosive coating for power transmission and transformation lines according to claim 8, characterized in that: the frequency of the ultrasound in the step S1 is 23-25kHz, and the power is 250-350W.
10. The preparation method of the nano modified anticorrosive coating for power transmission and transformation lines according to claim 9, characterized in that: the rotation speed of the high-speed dispersion in step S1 is 4500-5000 rpm.
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