CN112521836A - Quick-drying type lubricating/wear-resistant anti-corrosion function integrated aluminum coating for fasteners - Google Patents
Quick-drying type lubricating/wear-resistant anti-corrosion function integrated aluminum coating for fasteners Download PDFInfo
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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
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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
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Abstract
The invention relates to a quick-drying type lubricating/wear-resistant anti-corrosion functional integrated aluminum coating for a fastener, which is prepared from the following components in percentage by weight: 6-10% of epoxy resin, 2-5% of phenolic resin, 0.1-0.3% of organic silicon resin, 4-7% of polytetrafluoroethylene, 0.5-1.5% of nano lanthanum trifluoride, 1-3% of flake aluminum powder, 1.5-4.0% of spherical aluminum powder, 0.1-0.3% of organic bentonite and the balance of a mixed solvent; the mixed solvent is formed by uniformly mixing 24-28% of absolute ethyl alcohol, 17-20% of butanone and 55-57% of toluene according to volume percentage. The aluminum coating has the advantages of good adhesive force, high mechanical strength, good paint remover resistance and fluid resistance, excellent lubricating wear resistance and corrosion protection performance, high drying speed at normal temperature, convenient operation process and more suitability for the internal threads of the fasteners needing dip coating.
Description
Technical Field
The invention relates to a self-lubricating aluminum coating technology, in particular to a quick-drying type lubricating/wear-resistant and corrosion-resistant integrated aluminum coating for fasteners.
Background
The fastener is a common mechanical connection mode, is called industrial rice and is widely applied to the fields of general machinery, engineering machinery, national defense industry and the like. The number of fasteners used in aircraft varies from tens of thousands to nearly a million, depending on the aircraft airframe structural attachment characteristics and model size. With the great improvement of the flight speed, the maneuverability, the mounting capacity, the structural strength and the service life of the modern military aircraft and the application of a large amount of new materials and new technologies in the aerospace field, higher requirements are put forward on the fastening and the connection of the airframe structure.
Because titanium and titanium alloy have advantages of light weight, high specific strength, excellent corrosion resistance, good high temperature resistance and the like, the titanium and titanium alloy are widely applied to national defense industries such as aviation, aerospace, ships, ground weaponry and the like. Titanium alloy fasteners have become a key basic component of high-tech equipment. However, galvanic corrosion is likely to occur when the titanium alloy fastener is contacted with the metal with larger potential difference, such as aluminum, steel, etc., and the titanium alloy has poor wear resistance, so fretting wear is likely to cause fatigue resistance and corrosion resistance reduction. The traditional titanium alloy fastener surface treatment technology, such as galvanization, chromium plating and the like, can not meet the performance requirements of a new material fastener on assembly, corrosion resistance, lubrication, adhesion, paint removal resistance and the like; on the other hand, the western developed countries such as the united states and the european union have been making clear the prohibition of the surface chromium plating and zinc plating techniques from the viewpoint of causing serious pollution and influence on the natural environment and the living environment. The self-lubricating aluminum coating of the aviation fastener is a novel green surface treatment material for replacing the surface treatment of the electroplating layer of the traditional aviation fastener, and has been widely concerned by the international aviation industry. The Hi-Shear company in the United states started to conduct a great deal of research work in this regard in the last 80 th century to form Hi-Kote series products (Hi-Kote 1, Hi-Kote1NC, Hi-Kote2 and Hi-Kote4 NC), in which Hi-Kote4NC is excellent in corrosion resistance and lubrication properties, free from contamination, directly applicable to bolt connections of medium-low interference, free from additional lubrication treatment of threads, enabling the engineered application of self-lubricating aluminum coatings to titanium alloy fasteners, and forming the relevant standard specifications of Hi-Shear294 and Hi-Shear 294. The coating technology is a core technology which is mastered exclusively at present, and strict technical blockade is carried out outside, and in addition, the technology cannot be applied to the domestic models at present due to the prohibition and limited purchase in China.
The lubricating and anti-corrosion treatment technology of the novel titanium alloy fastener of the fighter is researched later in China, aluminum-coated paint is adopted at present and then compounded with hexadecanol for lubrication, the level of the Hi-Kote1 standard is still kept abroad, the self-lubricating effect is realized by adding the hexadecanol, and the lubricating capability of the hexadecanol is limited, and the hexadecanol has the defects of falling and volatilization after compounding, so that the assembly performance is unstable, the connection reliability and the pretightening force effect of the bolt after assembly are directly influenced, and the design requirement of equipment cannot be met. The existing cadmium-free self-lubricating aluminum coating in China has a larger gap compared with the existing cadmium-free self-lubricating aluminum coating in China, can not meet the requirements of international related standard specifications, and only solves the problem that the aluminum coating for aviation fasteners in China has no effect. Therefore, the high-performance self-lubricating aluminum coating is developed, the problems of seizure, falling, looseness, corrosion, moment failure and the like in the connection and assembly of the machine body structure are thoroughly solved, the technical and tactical efficiency is ensured, the blank of China in the field is filled, the domestic production of related high-performance aluminum coating products is realized, and the high-performance self-lubricating aluminum coating has important practical significance for improving the weapon equipment level of China.
Disclosure of Invention
The invention aims to solve the technical problem of providing a quick-drying type lubricating/wear-resistant and corrosion-resistant integrated aluminum coating for fasteners, which has excellent performance.
In order to solve the problems, the quick-drying type lubricating/wear-resistant and corrosion-resistant integrated aluminum coating for the fastener is characterized in that: the coating is prepared from the following components in percentage by weight: 6-10% of epoxy resin, 2-5% of phenolic resin, 0.1-0.3% of organic silicon resin, 4-7% of polytetrafluoroethylene, 0.5-1.5% of nano lanthanum trifluoride, 1-3% of flake aluminum powder, 1.5-4.0% of spherical aluminum powder, 0.1-0.3% of organic bentonite and the balance of a mixed solvent; the mixed solvent is formed by uniformly mixing 24-28% of absolute ethyl alcohol, 17-20% of butanone and 55-57% of toluene according to volume percentage.
The epoxy resin is a transparent solid, the softening point is 115-135 ℃, the epoxy equivalent is 1700-2500 g/eq, and the epoxy value is 0.06eq/100 g.
The phenolic resin is a yellow solid, and the molecular structural formula of the phenolic resin is as follows:
the solid content of the organic silicon resin is 50 +/-1% (150 ℃,2 h), the viscosity is more than or equal to 15 s (coating-4 cups, 25 ℃), and the heat resistance (200 ℃) is more than or equal to 300 hours.
The purity of the polytetrafluoroethylene is more than 99%, and the particle size is 2-5 microns.
The purity of the nanometer lanthanum trifluoride is more than 99%, and the particle size is 40 nm.
The average particle size of the flaky aluminum powder is 3-5 microns, and the water surface covering power is 40000 cm/g +/-10%.
The purity of the spherical aluminum powder is more than 99%, and the particle size is 1-2 microns.
The purity of the organic bentonite is more than 99%, and the particle size is 400 meshes.
The preparation method of the quick-drying type lubricating/wear-resisting and corrosion-resisting function integrated aluminum coating for the fastener comprises the following steps:
weighing according to a formula;
adding epoxy resin, phenolic resin and organic silicon resin into part of the mixed solvent, and ultrasonically stirring at room temperature to completely dissolve the epoxy resin, the phenolic resin and the organic silicon resin to obtain a well-dissolved resin system;
thirdly, adding polytetrafluoroethylene and organic bentonite into a mixed solvent with the weight 4-5 times of the total weight of the polytetrafluoroethylene and the organic bentonite, stirring, pouring into a conical mill, and grinding and dispersing twice to obtain a material A;
adding nanometer lanthanum trifluoride into a mixed solvent which is 3-4 times of the weight of the nanometer lanthanum trifluoride, and performing ultrasonic dispersion at room temperature for 30min to obtain a material B;
fifthly, adding the flaky aluminum powder and the spherical aluminum powder into a mixed solvent with the weight being 3-4 times of the total weight of the flaky aluminum powder and the spherical aluminum powder, and dispersing at a speed of 1500-2000 r/min for 0.5h to obtain a material B;
sixthly, mixing the dissolved resin system, the material A, the material B and the material C, adding the remaining mixed solvent, and stirring and dispersing uniformly to obtain the aluminum coating.
Compared with the prior art, the invention has the following advantages:
1. the invention selects the phenolic resin and the organic silicon modified epoxy resin with good corrosion protection and excellent comprehensive mechanical property as the matrix resin, and the liquid resistance and the paint remover resistance of the matrix resin are realized through the combination of the resins, so that the matrix resin has the toughness characteristic and the excellent comprehensive property.
2. The invention selects the polytetrafluoroethylene as the lubricating filler, the polytetrafluoroethylene has low surface energy, excellent chemical stability, corrosion resistance and lubricating property, and can ensure that the obtained aluminum coating has good lubricating property and is not easy to corrode.
3. The invention selects the nanometer lanthanum trifluoride as the functional filler, the nanometer lanthanum trifluoride and the polytetrafluoroethylene have good synergistic effect, and the bearing performance and the wear resistance of the polytetrafluoroethylene can be improved.
4. The flaky aluminum powder and the spherical aluminum powder are selected as corrosion-resistant fillers, the flaky aluminum powder has very good shielding performance, can block the permeation of a corrosion medium and improve the corrosion resistance of the coating, and the spherical aluminum powder can improve the bearing capacity of the coating and has the functions of resisting wear and reducing friction; meanwhile, the aluminum powder has good corrosion resistance, and a layer of compact passive film (Al) can be generated in oxidizing acid2O3) And further corrosion is prevented.
5. The organic bentonite is selected, the organic bentonite can improve the directional arrangement of the flaky aluminum powder, and meanwhile, the organic bentonite can enable the aluminum coating to have the anti-settling effect and improve the thixotropy and the fluidity of the coating.
6. The invention screens out an optimal size reasonable grading model by utilizing different shapes (mainly spherical and flaky structures) of different lubricating and wear-resistant fillers and aluminum powder and embedding and tangling with a basic resin molecular chain, and builds an isolated and shielded three-dimensional space structure as shown in figure 1. When external factors (including corrosive media and load) diffuse to the coating, the flaky aluminum powder and the polytetrafluoroethylene have good shielding and blocking effects, the corrosive media are prevented from diffusing to the inside of the coating, meanwhile, the polytetrafluoroethylene has good lubricating performance, and the spherical aluminum powder and the rare earth fluoride (nano lanthanum trifluoride) embedded in the resin have good bearing capacity and wear resistance, so that the three-dimensional structure of the isolated shielding ensures that the lubricating/wear-resisting and corrosion-preventing functions of the coating are achieved.
7. The invention belongs to a quick-drying aluminum coating, which has the advantages of high drying speed (drying can be carried out within 30-60 seconds) at normal temperature, convenient operation process and suitability for parts needing dip coating.
8. The aluminum coating disclosed by the invention is detected, has good adhesion to a fastener, excellent paint remover resistance and liquid resistance, and good wear-resistant lubrication and corrosion protection properties (see table 1), can fundamentally solve the problems of seizure, falling, loosening, corrosion, moment failure and the like during the assembly of an airplane body structure, eliminates the flight safety hazard, improves the assembly quality of an airplane, prolongs the overall service life, and improves the overall level of the domestic aviation field. The invention can also be popularized in the fields of advanced weaponry such as ships, weapons and the like, and has effective lubricating and protecting functions.
TABLE 1 main performance index of quick-drying type aluminum coating integrating lubrication and anticorrosion functions
TABLE 2 alternate dipping requirements for aluminum coatings
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a three-dimensional structure model of the isolation barrier of the present invention.
Detailed Description
Example 1 a quick-drying type lubricating/wear-resistant anti-corrosion functional integrated aluminum coating for fasteners, which is prepared from the following components in percentage by weight: 6.00g of epoxy resin, 2.00g of phenolic resin, 0.10g of organic silicon resin, 4.0g of polytetrafluoroethylene, 0.50g of nano lanthanum trifluoride, 3.00g of flake aluminum powder, 1.50g of spherical aluminum powder, 0.30g of organic bentonite and 82.6g of mixed solvent. The mixed solvent is prepared by uniformly mixing 25 percent of absolute ethyl alcohol, 18 percent of butanone and 57 percent of toluene according to volume percentage.
The preparation method comprises the following steps:
weighing according to a formula;
adding epoxy resin, phenolic resin and organic silicon resin into part of the mixed solvent, and ultrasonically stirring at room temperature to completely dissolve the epoxy resin, the phenolic resin and the organic silicon resin to obtain a well-dissolved resin system;
thirdly, adding polytetrafluoroethylene and organic bentonite into a mixed solvent with the weight 4-5 times of the total weight of the polytetrafluoroethylene and the organic bentonite, stirring, pouring into a conical mill, and grinding and dispersing twice to obtain a material A;
adding nanometer lanthanum trifluoride into a mixed solvent which is 3-4 times of the weight of the nanometer lanthanum trifluoride, and performing ultrasonic dispersion at room temperature for 30min to obtain a material B;
fifthly, adding the flaky aluminum powder and the spherical aluminum powder into a mixed solvent with the weight being 3-4 times of the total weight of the flaky aluminum powder and the spherical aluminum powder, and dispersing at a speed of 1500-2000 r/min for 0.5h to obtain a material B;
sixthly, mixing the dissolved resin system, the material A, the material B and the material C, adding the rest mixed solvent, and stirring and dispersing uniformly to obtain the aluminum coating.
Example 2 a quick-drying type lubricating/wear-resistant anti-corrosion functional integrated aluminum coating for fasteners, which is prepared from the following components in percentage by weight: 7.66g of epoxy resin, 3.00g of phenolic resin, 0.2g of organic silicon resin, 5.85g of polytetrafluoroethylene, 1.1g of nano lanthanum trifluoride, 1.50g of sheet aluminum powder, 2.50g of spherical aluminum powder, 0.15g of organic bentonite and 78.0g of mixed solvent. The mixed solvent is prepared by uniformly mixing 25 percent of absolute ethyl alcohol, 18 percent of butanone and 57 percent of toluene according to volume percentage.
The preparation method is the same as that of example 1.
Example 3 a quick-drying type lubricating/wear-resistant anti-corrosion functional integrated aluminum coating for fasteners, which is prepared from the following components in percentage by weight: 8.50g of epoxy resin, 4.05g of phenolic resin, 0.25g of organic silicon resin, 6.50g of polytetrafluoroethylene, 0.5g of nano lanthanum trifluoride, 1.00g of flake aluminum powder, 2.0g of spherical aluminum powder, 0.15g of organic bentonite and 77.0 g of mixed solvent. The mixed solvent is formed by evenly mixing 26 percent of absolute ethyl alcohol, 18 percent of butanone and 56 percent of toluene according to volume percentage.
The preparation method is the same as that of example 1.
Example 4 a quick-drying type lubricating/wear-resistant anti-corrosive functional integrated aluminum coating for fasteners, which is prepared from the following components in percentage by weight: 7.50g of epoxy resin, 2.50g of phenolic resin, 0.20g of organic silicon resin, 5.50g of polytetrafluoroethylene, 1.2g of nano lanthanum trifluoride, 2.45g of flake aluminum powder, 3.00g of spherical aluminum powder, 0.30g of organic bentonite and 77.3g of mixed solvent. The mixed solvent is formed by evenly mixing 26 percent of absolute ethyl alcohol, 17 percent of butanone and 57 percent of toluene according to volume percentage.
The preparation method is the same as that of example 1.
Example 5 a quick-drying type lubricating/wear-resistant anti-corrosive functional integrated aluminum coating for fasteners, which is prepared from the following components in percentage by weight: 6.50g of epoxy resin, 3.50g of phenolic resin, 0.1g of organic silicon resin, 4.00g of polytetrafluoroethylene, 0.85g of nano lanthanum trifluoride, 1.50g of flake aluminum powder, 2.50g of spherical aluminum powder, 0.15g of organic bentonite and 81.0g of mixed solvent. The mixed solvent is prepared by uniformly mixing 25 percent of absolute ethyl alcohol, 18 percent of butanone and 57 percent of toluene according to volume percentage.
The preparation method is the same as that of example 1.
Example 6 a quick-drying type lubricating/wear-resistant anti-corrosive functional integrated aluminum coating for fasteners, which is prepared from the following components in percentage by weight: 8.75g of epoxy resin, 4.25g of phenolic resin, 0.3g of organic silicon resin, 6.81g of polytetrafluoroethylene, 1.5g of nano lanthanum trifluoride, 1.88g of flake aluminum powder, 2.50g of spherical aluminum powder, 0.21g of organic bentonite and 74.0g of mixed solvent. The mixed solvent is prepared by uniformly mixing 28 percent of absolute ethyl alcohol, 17 percent of butanone and 55 percent of toluene according to volume percentage (mL).
The preparation method is the same as that of example 1.
Example 7 a quick-drying type lubricating/wear-resistant anti-corrosive functional integrated aluminum coating for fasteners, which is prepared from the following components in percentage by weight: 10.00g of epoxy resin, 5.00g of phenolic resin, 0.30g of organic silicon resin, 7.0g of polytetrafluoroethylene, 1.5g of nano lanthanum trifluoride, 1.0g of flake aluminum powder, 4.00g of spherical aluminum powder, 0.10g of organic bentonite and 71.1g of mixed solvent. The mixed solvent is prepared by uniformly mixing 24 percent of absolute ethyl alcohol, 20 percent of butanone and 56 percent of toluene according to volume percentage.
The preparation method is the same as that of example 1.
In the above examples 1 to 7, the epoxy resin is a white transparent solid, has a softening point of 115 to 135 ℃, an epoxy equivalent of 1700 to 2500g/eq, and an epoxy value of 0.06eq/100g, and is provided by Teng Biotech, Fuzhou.
The phenolic resin is provided by Shaanxi Taihang fire retardant polymer Limited company, is yellow solid, has the viscosity of 25s, the melting point of 120 ℃, the oxygen index of 0.48 (higher than that of most high molecular materials), the resin decomposition temperature of 500 ℃ and the molecular structural formula as follows:
the solid content of the organic silicon resin is 50 +/-1 percent (150 ℃,2 h), the viscosity is more than or equal to 15 s (coating-4 cups, 25 ℃), and the heat resistance (200 ℃) is more than or equal to 300 hours. Offered by the tengyuan biotechnology limited of fuzhou.
The purity of the polytetrafluoroethylene is more than 99%, and the particle size is 2-5 microns. The purity of the nanometer lanthanum trifluoride is more than 99 percent, and the particle size is 40 nm. The average particle size of the flaky aluminum powder is 3-5 microns, and the water surface covering power is 40000 cm/g +/-10%. The purity of the spherical aluminum powder is more than 99%, and the particle size is 1-2 microns. The purity of the organic bentonite is more than 99 percent, and the grain diameter is 400 meshes.
The aluminum coatings of examples 1-7 were a suspension and were thoroughly and uniformly stirred before use. The coating is coated on the external thread surface and the internal thread surface of the fastener by adopting a spraying and dip-coating method, the internal thread surface and the external thread surface of the fastener are subjected to sand blasting coarsening treatment before the coating is prepared, and then the surfaces are cleaned by acetone. The coating belongs to a quick-drying coating, so that the pressure is adjusted to 0.05-0.15 MPa during spraying, and the thickness of the coating can reach 5-13 microns after spraying for 1-2 times; the thickness of 5-20 microns can be achieved after 2-3 times of dip coating, and the drying speed of the coating after each time of dip coating is high (drying can be achieved after 30-60 seconds). Curing conditions are as follows: the product can be used after being cooled in a furnace at the constant temperature of 200 +/-3 ℃ for 60 minutes.
Claims (10)
1. The utility model provides a lubricated anticorrosive function integration aluminum coating of quick-drying type for fastener which characterized in that: the coating is prepared from the following components in percentage by weight: 6-10% of epoxy resin, 2-5% of phenolic resin, 0.1-0.3% of organic silicon resin, 4-7% of polytetrafluoroethylene, 0.5-1.5% of nano lanthanum trifluoride, 1-3% of flake aluminum powder, 1.5-4.0% of spherical aluminum powder, 0.1-0.3% of organic bentonite and the balance of a mixed solvent; the mixed solvent is formed by uniformly mixing 24-28% of absolute ethyl alcohol, 17-20% of butanone and 55-57% of toluene according to volume percentage.
2. The quick-drying type lubricating/wear-resistant anti-corrosion functional integrated aluminum coating for the fastener according to claim 1, characterized in that: the epoxy resin is a transparent solid, the softening point is 115-135 ℃, the epoxy equivalent is 1700-2500 g/eq, and the epoxy value is 0.06eq/100 g.
3. The quick-drying type lubricating/wear-resistant anti-corrosion functional integrated aluminum coating for the fastener according to claim 1, characterized in that: the phenolic resin is a yellow solid, and the molecular structural formula of the phenolic resin is as follows:
4. the quick-drying type lubricating/wear-resistant anti-corrosion functional integrated aluminum coating for the fastener according to claim 1, characterized in that: the solid content of the organic silicon resin is 50 +/-1%, the viscosity is more than or equal to 15 s, and the heat resistance at 200 ℃ is more than or equal to 300 hours.
5. The quick-drying type lubricating/wear-resistant anti-corrosion functional integrated aluminum coating for the fastener according to claim 1, characterized in that: the purity of the polytetrafluoroethylene is more than 99%, and the particle size is 2-5 microns.
6. The quick-drying type lubricating/wear-resistant anti-corrosion functional integrated aluminum coating for the fastener according to claim 1, characterized in that: the purity of the nanometer lanthanum trifluoride is more than 99%, and the particle size is 40 nm.
7. The quick-drying type lubricating/wear-resistant anti-corrosion functional integrated aluminum coating for the fastener according to claim 1, characterized in that: the average particle size of the flaky aluminum powder is 3-5 microns, and the water surface covering power is 40000 cm/g +/-10%.
8. The quick-drying type lubricating/wear-resistant anti-corrosion functional integrated aluminum coating for the fastener according to claim 1, characterized in that: the purity of the spherical aluminum powder is more than 99%, and the particle size is 1-2 microns.
9. The quick-drying type lubricating/wear-resistant anti-corrosion functional integrated aluminum coating for the fastener according to claim 1, characterized in that: the purity of the organic bentonite is more than 99%, and the particle size is 400 meshes.
10. The preparation method of the quick-drying type lubricating/wear-resisting anti-corrosion function integrated aluminum coating for the fastener according to claim 1, comprising the following steps of:
weighing according to a formula;
adding epoxy resin, phenolic resin and organic silicon resin into part of the mixed solvent, and ultrasonically stirring at room temperature to completely dissolve the epoxy resin, the phenolic resin and the organic silicon resin to obtain a well-dissolved resin system;
thirdly, adding polytetrafluoroethylene and organic bentonite into a mixed solvent with the weight 4-5 times of the total weight of the polytetrafluoroethylene and the organic bentonite, stirring, pouring into a conical mill, and grinding and dispersing twice to obtain a material A;
adding nanometer lanthanum trifluoride into a mixed solvent which is 3-4 times of the weight of the nanometer lanthanum trifluoride, and performing ultrasonic dispersion at room temperature for 30min to obtain a material B;
fifthly, adding the flaky aluminum powder and the spherical aluminum powder into a mixed solvent with the weight being 3-4 times of the total weight of the flaky aluminum powder and the spherical aluminum powder, and dispersing at a speed of 1500-2000 r/min for 0.5h to obtain a material B;
sixthly, mixing the dissolved resin system, the material A, the material B and the material C, adding the remaining mixed solvent, and stirring and dispersing uniformly to obtain the aluminum coating.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011559005.XA CN112521836B (en) | 2020-12-25 | 2020-12-25 | Quick-drying type lubricating/wear-resistant anti-corrosion function integrated aluminum coating for fasteners |
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| CN114686073A (en) * | 2022-04-13 | 2022-07-01 | 沈阳化工大学 | Environment-friendly water-based aluminum-rich coating with long-term storage stability |
| CN115725235A (en) * | 2022-09-16 | 2023-03-03 | 中国航发北京航空材料研究院 | Nontoxic high-temperature-resistant anticorrosive paint and preparation method thereof |
| CN115851077A (en) * | 2022-11-29 | 2023-03-28 | 中国科学院兰州化学物理研究所 | Polytetrafluoroethylene/phenolic aldehyde epoxy group organic bonding coating and preparation method thereof |
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