Anticorrosive nano deposition liquid as well as preparation method, application and application method thereof

Abstract

The invention belongs to the technical field of ceramic coatings, and provides an anti-corrosion nano deposition solution and a preparation method and application thereof and an application method.The deposition solution is prepared from silicon dioxide, aluminum oxide, boron nitride, epoxy resin, polypropylene resin, a magnetoelectric ion complexing agent, graphene, a wetting agent, a flatting agent, a dispersing agent, a coupling agent and water. The preparation method provided by the invention is simple, and the finished product can be obtained by simple mixing on the basis of determining each step. The process is simple, reaction conditions are easy to control, and the method is suitable for large-scale preparation and application. Through combination of specific raw materials and a nano-deposition mode, the target workpiece is completely covered without dead corners, and complete corrosion prevention is achieved in the true sense. In addition, ultrathin and efficient corrosion prevention of the workpiece coating is achieved, under the same corrosion prevention performance, the thickness of the other vast majority of coatings is at least 10 times or above the thickness of the coating, and the purposes of being efficient, high in performance, low in cost and easy to operate are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of ceramic coating, and particularly relates to an anti-corrosion nano-deposition liquid, a preparation method and an application thereof, as well as an application method. Background Art

[0002] Most of the machine equipment used in modern society is protected by a metal shell, mainly to ensure that the internal core components are not damaged by bumps and other impacts and stop running. It is found during use that although this method can avoid physical damage, due to environmental or human factors, the machine shell will be damaged. For example, in special scenarios such as salt spray environment and humid environment, the surface metal corrosion will be accelerated, affecting the core components; the losses caused by this corrosion are far higher than the costs incurred under normal conditions, especially for complex-structured parts, and it is impossible to completely solve the problem.

[0003] In this case, in order to avoid the occurrence of corrosion, technicians began to study the metal shell. Common methods include electrochemical anti-corrosion, coating anti-corrosion, etc.; the cost of electrochemical anti-corrosion is high, and additional equipment needs to be added, increasing the objects and costs of maintenance; coating anti-corrosion is the most deeply studied field and has achieved good results at present. However, the problem is that under the action of stress such as bumps and bends, the coating will be damaged, and corrosion will start from the damaged point, so that a comprehensive protection effect cannot be achieved. Therefore, providing a coating with good anti-corrosion effect and high hardness has become an urgent problem to be solved. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects in the prior art and provide an anti-corrosion nano-deposition liquid, a preparation method and an application thereof, as well as an application method.

[0005] In order to achieve the above-mentioned invention purpose, the present invention provides the following technical solutions:

[0006] The present invention provides an anti-corrosion nano-deposition liquid, which is prepared from raw materials comprising the following mass parts:

[0007] 20-40 parts of silicon dioxide, 1-7 parts of aluminum oxide, 1-4 parts of boron nitride, 2-3 parts of epoxy resin, 1-2 parts of polypropylene resin, 1-3 parts of magnetoelectric ion composite agent, 2-8 parts of graphene, 0.5-1 part of wetting agent, 0.5-1 part of leveling agent, 1-1.2 parts of dispersant, 1-1.5 parts of coupling agent, and 150-380 parts of water.

[0008] Preferably, the magnetoelectric ion composite agent comprises one or more of [bmim]FeCl4, [bpy]FeCl4, [bmp]FeCl4, and [pbmim](FeCl4)2.

[0009] Preferably, the wetting agent comprises alkylphenol polyoxyethylene ether and / or fatty alcohol polyoxyethylene ether.

[0010] Preferably, the leveling agent is polyether-modified silicone and / or polyester-modified silicone.

[0011] Preferably, the dispersant is one or more of sodium polyacrylate, ammonium polyacrylate and sodium hexametaphosphate;

[0012] The coupling agent is a silane coupling agent and / or a titanate coupling agent.

[0013] The present invention also provides a method for preparing the anti-corrosion nano-deposition liquid, comprising the following steps:

[0014] (1) Mix graphene, the first batch of wetting agent, the first batch of dispersant and water to obtain a graphene slurry;

[0015] (2) Mix epoxy resin, polypropylene resin, the remaining wetting agent, the remaining dispersant and the leveling agent, and then add silicon dioxide, aluminum oxide and boron nitride for secondary mixing to obtain a mixed system;

[0016] (3) Mix the graphene slurry, the mixed system and the remaining raw materials, and grind and ultrasonically disperse them to obtain the anti-corrosion nano-deposition liquid.

[0017] Preferably, in step (1), the mass of the first batch of wetting agent is 40-50% of the mass of the wetting agent; in step (1), the mass of the first batch of dispersant is 40-50% of the mass of the dispersant;

[0018] In step (1), the grinding speed of the mixing is 500-4800 rpm, the time is 1-3.5 h, and the ultrasonic dispersion frequency is 20-80 kHz;

[0019] In step (2), the rotation speed of the mixing is 200-4000 rpm, and the time is 1-3.5 h;

[0020] In step (2), the time of the secondary mixing is 12-24 h;

[0021] In step (3), the mixing time is 12-16 h; in step (3), the particle size of the grinding is 0.05-2 μm.

[0022] The present invention also provides the application of the anti-corrosion nano-deposition liquid in the preparation of a ceramic coating.

[0023] The present invention also provides an application method of the anti-corrosion nano-deposition liquid in the preparation of a ceramic coating, comprising the following steps:

[0024] (a) After subjecting the pretreated workpiece to liquid-phase nano-deposition in the anti-corrosion nano-deposition solution, impurity removal is carried out to obtain a preliminary ceramic workpiece;

[0025] (b) The preliminary ceramic workpiece is subjected to densification treatment to obtain a densified ceramic workpiece;

[0026] (c) The densified ceramic workpiece is subjected to gas-phase nano-deposition using the anti-corrosion nano-deposition solution to obtain a ceramic-coated workpiece, thus completing the treatment.

[0027] Preferably, in step (a), the magnetic field force for the liquid-phase nano-deposition is 1800 - 3600 N, and the time is 0.5 - 5 h;

[0028] In step (a), the circulating liquid for the impurity removal is water, the magnetic field force for the impurity removal is 1800 - 3600 N, and the time is 10 - 30 min;

[0029] In step (b), the magnetic field force for the densification treatment is 1800 - 3600 N, the time is 0.5 - 1.5 h, and the temperature is 40 - 80 °C;

[0030] In step (c), the magnetic field force for the gas-phase nano-deposition is 1800 - 3600 N, the time is 0.5 - 4 h, and the temperature is 60 - 480 °C.

[0031] The present invention provides an anti-corrosion nano-deposition solution, which is prepared from raw materials containing the following parts by mass: 20 - 40 parts of silicon dioxide, 1 - 7 parts of aluminum oxide, 1 - 4 parts of boron nitride, 2 - 3 parts of epoxy resin, 1 - 2 parts of polypropylene resin, 1 - 3 parts of magnetoelectric ion composite agent, 2 - 8 parts of graphene, 0.5 - 1 part of wetting agent, 0.5 - 1 part of leveling agent, 1 - 1.2 parts of dispersant, 1 - 1.5 parts of coupling agent, and 150 - 380 parts of water.

[0032] In the anti-corrosion nano-deposition solution provided by the present invention, silica, aluminum oxide and boron nitride are used as the main components, and ceramic materials can be formed during use to increase the hardness of the coating. Graphene is added as the main anti-corrosion raw material in the present invention, and graphene is evenly dispersed in the deposition solution by ultrasonic compounding to avoid agglomeration. Then, in subsequent applications, under the action of magnetic force, graphene can be densely arranged on the surface of the coating to form a shielding layer to block the erosion of corrosive substances and improve the anti-corrosion property of the coating. Epoxy resin and polypropylene resin are added to the deposition solution in the present invention. The main function of the resin is to carry various raw materials, avoid deposition during the construction process, and can also evenly disperse the raw materials in the matrix coating to improve the density inside the coating and further enhance the anti-corrosion effect. A magnetoelectric ion compounding agent is added in the present invention. Under the action of organic groups, the compounding agent can adsorb the raw materials in the deposition solution, and under the action of magnetic force, the arrangement of the raw materials can be realized, and a uniform coating can be obtained on the surface of the workpiece, and the anti-corrosion performance is greatly improved.

[0033] The present invention also provides a preparation method for the anti-corrosion nano-deposition solution, which includes the following steps: mixing graphene, the first batch of wetting agents, the first batch of dispersing agents and water to obtain a graphene slurry; mixing epoxy resin, polypropylene resin, the remaining wetting agents, the remaining dispersing agents and a leveling agent, and then adding silica, aluminum oxide and boron nitride for secondary mixing to obtain a mixed system; mixing the graphene slurry, the mixed system and the remaining raw materials, and grinding, compounding and ultrasonically dispersing to obtain the anti-corrosion nano-deposition solution. The preparation method provided by the present invention is simple, and the finished product can be obtained through simple mixing on the basis of determining each step. This method has a simple process, low requirements, easy control of reaction conditions, and is suitable for large-scale preparation and application.

[0034] Through the combination of specific raw materials and the method of nano-deposition, the present invention achieves full coverage and no dead angle of the target workpiece, and truly realizes complete anti-corrosion. And the present invention realizes ultra-thin and highly efficient anti-corrosion of the workpiece coating. Under the same anti-corrosion performance, the thickness of other coatings is at least 10 times that of the coating of the present invention, achieving the purposes of high efficiency, high performance, low cost and easy operation. Specific Embodiments

[0035] The present invention provides an anti-corrosion nano-deposition solution, which is prepared from raw materials containing the following parts by mass:

[0036] 20 - 40 parts of silica, 1 - 7 parts of aluminum oxide, 1 - 4 parts of boron nitride, 2 - 3 parts of epoxy resin, 1 - 2 parts of polypropylene resin, 1 - 3 parts of magnetoelectric ion compounding agent, 2 - 8 parts of graphene, 0.5 - 1 part of wetting agent, 0.5 - 1 part of leveling agent, 1 - 1.2 parts of dispersing agent, 1 - 1.5 parts of coupling agent, 150 - 380 parts of water.

[0037] In the present invention, the mass fraction of the silica is preferably 25 to 35 parts, more preferably 26 to 34 parts, and still more preferably 28 to 32 parts.

[0038] In the present invention, the mass fraction of the aluminum oxide is preferably 2 to 6 parts, more preferably 3 to 5 parts, and still more preferably 3.5 to 4.5 parts.

[0039] In the present invention, the mass fraction of the boron nitride is preferably 1.5 to 3.5 parts, more preferably 2 to 3 parts, and still more preferably 2.4 to 2.6 parts.

[0040] In the present invention, the mass fraction of the epoxy resin is preferably 2.1 to 2.9 parts, more preferably 2.2 to 2.8 parts, and still more preferably 2.4 to 2.6 parts.

[0041] In the present invention, the mass fraction of the polypropylene resin is preferably 1.1 to 1.9 parts, more preferably 1.2 to 1.8 parts, and still more preferably 1.4 to 1.6 parts.

[0042] In the present invention, the mass fraction of the magnetoelectric ion composite agent is preferably 1.5 to 2.5 parts, more preferably 1.6 to 2.4 parts, and still more preferably 1.8 to 2.2 parts.

[0043] In the present invention, the mass fraction of the graphene is preferably 3 to 7 parts, more preferably 4 to 6 parts, and still more preferably 4.5 to 5.5 parts.

[0044] In the present invention, the mass fraction of the wetting agent is preferably 0.6 to 0.9 parts, more preferably 0.7 to 0.8 parts, and still more preferably 0.72 to 0.75 parts.

[0045] In the present invention, the mass fraction of the leveling agent is preferably 0.55 to 0.95 parts, more preferably 0.6 to 0.9 parts, and still more preferably 0.7 to 0.8 parts.

[0046] In the present invention, the mass fraction of the dispersant is preferably 1.05 to 1.15 parts, more preferably 1.06 to 1.14 parts, and still more preferably 1.08 to 1.1 parts.

[0047] In the present invention, the mass fraction of the coupling agent is preferably 1.1 to 1.4 parts, more preferably 1.2 to 1.3 parts, and still more preferably 1.23 to 1.26 parts.

[0048] In the present invention, the mass fraction of the water is preferably 200 to 350 parts, more preferably 250 to 300 parts, and still more preferably 260 to 280 parts.

[0049] In the present invention, the particle sizes of the silica, aluminum oxide and boron nitride are independently preferably 1 to 100 nm, further independently preferably 10 to 90 nm, and more independently preferably 40 to 60 nm.

[0050] In the present invention, the epoxy resin is bisphenol A epoxy resin and / or bisphenol F epoxy resin.

[0051] In the present invention, the magnetoelectric ion composite agent comprises one or more of [bmim]FeCl4, [bpy]FeCl4, [bmp]FeCl4 and [pbmim](FeCl4)2.

[0052] In the present invention, the wetting agent comprises alkylphenol polyoxyethylene ether and / or carbon fatty alcohol polyoxyethylene ether.

[0053] In the present invention, the leveling agent is polyether-modified silicone and / or polyester-modified silicone.

[0054] In the present invention, the dispersant is one or more of sodium polyacrylate, ammonium polyacrylate and sodium hexametaphosphate;

[0055] In the present invention, the coupling agent is silane coupling agent and / or titanate coupling agent.

[0056] The present invention also provides a method for preparing the anti-corrosion nano-deposition liquid, comprising the following steps:

[0057] (1) Mix graphene, the first batch of wetting agent, the first batch of dispersant and water to obtain a graphene slurry;

[0058] (2) Mix epoxy resin, polypropylene resin, the remaining wetting agent, the remaining dispersant and the leveling agent, and then add silica, aluminum oxide and boron nitride for secondary mixing to obtain a mixed system;

[0059] (3) Mix the graphene slurry, the mixed system and the remaining raw materials, and grind and ultrasonically disperse to obtain the anti-corrosion nano-deposition liquid.

[0060] In the present invention, in step (1), the mass of the first batch of wetting agent is preferably 40 to 50% of the mass of the wetting agent, further preferably 42 to 48%, and more preferably 44 to 46%; in step (1), the mass of the first batch of dispersant is preferably 40 to 50% of the mass of the dispersant, further preferably 42 to 48%, and more preferably 44 to 46%.

[0061] In the present invention, the grinding rotation speed in step (1) for the mixing is preferably 500 - 4800 rpm, more preferably 1000 - 4000 rpm, and even more preferably 2000 - 3000 rpm; the time is preferably 1 - 3.5 h, more preferably 1.5 - 3 h, and even more preferably 2 - 2.5 h; the ultrasonic dispersion frequency is preferably 20 - 80 kHz, more preferably 30 - 70 kHz, and even more preferably 40 - 60 kHz.

[0062] In the present invention, the rotation speed in step (2) for the mixing is preferably 200 - 4000 rpm, more preferably 1000 - 3000 rpm, and even more preferably 1500 - 2000 rpm; the time is preferably 1 - 3.5 h, more preferably 1.5 - 3 h, and even more preferably 2 - 2.5 h.

[0063] In the present invention, the time for the secondary mixing in step (2) is preferably 12 - 24 h, more preferably 14 - 20 h, and even more preferably 16 - 18 h.

[0064] In the present invention, the time for the mixing in step (3) is preferably 12 - 16 h, more preferably 13 - 15 h, and even more preferably 13.5 - 14.5 h; the particle size for the grinding in step (3) is preferably 0.05 - 2 μm, more preferably 0.5 - 1.5 μm, and even more preferably 0.8 - 1.2 μm.

[0065] In the present invention, after the grinding is completed, static settling is carried out, and the time for the static settling is preferably 3 - 5 h, and more preferably 4 h.

[0066] The present invention also provides the application of the anti - corrosion nano - deposition liquid in the preparation of a ceramic coating.

[0067] The present invention also provides a method for applying the anti - corrosion nano - deposition liquid in the preparation of a ceramic coating, which comprises the following steps:

[0068] (a) After subjecting a pretreated workpiece to liquid - phase nano - deposition in the anti - corrosion nano - deposition liquid and then removing impurities, a preliminary ceramic workpiece is obtained;

[0069] (b) Subjecting the preliminary ceramic workpiece to densification treatment to obtain a densified ceramic workpiece;

[0070] (c) Using the anti - corrosion nano - deposition liquid to carry out gas - phase nano - deposition on the densified ceramic workpiece to obtain a ceramic - coated workpiece, thus completing the treatment.

[0071] In the present invention, the pretreatment of the workpiece is magnetization pretreatment; the magnetizing voltage for the magnetization pretreatment is preferably 100 - 800V, more preferably 200 - 600V, and still more preferably 300 - 500V; the time is preferably 1 - 10s, more preferably 2 - 8s, and still more preferably 4 - 6s.

[0072] In the present invention, the magnetic field force for the liquid-phase nano-deposition in step (a) is preferably 1800 - 3600N, more preferably 2000 - 3500N, and still more preferably 2500 - 3000N; the time is preferably 0.5 - 5h, more preferably 2 - 4h, and still more preferably 2.5 - 3h.

[0073] In the present invention, the circulating liquid for impurity removal in step (a) is water, and the magnetic field force for impurity removal is preferably 1800 - 3600N, more preferably 2000 - 3500N, and still more preferably 2500 - 3000N; the time is preferably 10 - 30min, more preferably 15 - 25min, and still more preferably 18 - 20min.

[0074] In the present invention, the magnetic field force for the densification treatment in step (b) is preferably 1800 - 3600N, more preferably 2000 - 3500N, and still more preferably 2500 - 3000N; the time is preferably 0.5 - 1.5h, more preferably 1.1 - 1.4h, and still more preferably 1.2 - 1.3h; the temperature is preferably 40 - 80°C, more preferably 45 - 75°C, and still more preferably 50 - 60°C.

[0075] In the present invention, the magnetic field force for the gas-phase nano-deposition in step (c) is preferably 1800 - 3600N, more preferably 2000 - 3500N, and still more preferably 2500 - 3000N; the time is preferably 0.5 - 4h, more preferably 1 - 3h, and still more preferably 1.5 - 2h; the temperature is preferably 60 - 480°C, more preferably 100 - 400°C, and still more preferably 200 - 300°C.

[0076] The technical solutions provided by the present invention will be described in detail below in conjunction with the embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0077] Example 1

[0078] Prepare the following raw materials in parts by mass: 30 parts of silicon dioxide, 5 parts of aluminum oxide, 1 part of boron nitride, 2 parts of epoxy resin, 1 part of polypropylene resin, 2 parts of magnetoelectric ion composite agent, 5 parts of graphene, 0.6 part of wetting agent, 0.6 part of leveling agent, 1.1 parts of dispersant, 1.4 parts of coupling agent, and 280 parts of water; among them, the particle size of silicon dioxide is 50 nm, the particle size of aluminum oxide is 40 nm, the particle size of boron nitride is 55 nm, the epoxy resin is bisphenol A epoxy resin, the magnetoelectric ion composite agent is [bmim]FeCl4, the wetting agent uses alkylphenol polyoxyethylene ether, the leveling agent is polyether-modified silicone oxygen, the dispersant is sodium hexafluorophosphate, and the coupling agent uses silane coupling agent.

[0079] The preparation method is as follows: Mix graphene, the first batch of wetting agent (with a mass of 45% of the total mass of the wetting agent), the first batch of dispersant (with a mass of 40% of the total mass of the dispersant), and water, and stir at a speed of 2000 rpm and 25 kHz for 1 h to obtain a graphene slurry; then mix epoxy resin, polypropylene resin, the remaining wetting agent, the remaining dispersant, and the leveling agent, stir at a speed of 3000 rpm for 2 h, add silicon dioxide, aluminum oxide, and boron nitride, and mix for 20 h to obtain a mixed system; mix the graphene slurry, the mixed system, and the remaining raw materials for 14 h, and then grind to a particle size of 1.3 μm. After the grinding is completed, let it stand for 4 h to obtain an anti-corrosion nano-deposition liquid.

[0080] Perform magnetization pretreatment on the workpiece, process it at a magnetization voltage of 500 V for 5 s to obtain a pretreated workpiece, then immerse the pretreated workpiece in the anti-corrosion nano-deposition liquid, control the magnetic field force to be 2400 N, and deposit for 3 h; then use water as the circulating liquid, and remove impurities under the condition of 2400 N for 20 min to obtain a preliminary ceramic workpiece; densify the preliminary ceramic workpiece at 2000 N and 50 °C for 1 h to obtain a densified ceramic workpiece; perform gas-phase nano-deposition on the densified ceramic workpiece using the anti-corrosion nano-deposition liquid, with a magnetic field force of 3200 N, a temperature of 200 °C, and a time of 1 h to obtain a ceramic-coated workpiece, and complete the treatment.

[0081] Example 2

[0082] Prepare the following raw materials in parts by mass: 23 parts of silicon dioxide, 3 parts of aluminum oxide, 2 parts of boron nitride, 2.5 parts of epoxy resin, 1.7 parts of polypropylene resin, 1 part of magnetoelectric ion composite agent, 6 parts of graphene, 0.7 part of wetting agent, 0.8 part of leveling agent, 1.2 parts of dispersant, 1.1 parts of coupling agent, and 200 parts of water; among them, the particle size of silicon dioxide is 60 nm, the particle size of aluminum oxide is 60 nm, the particle size of boron nitride is 30 nm, the epoxy resin is bisphenol F epoxy resin, the magnetoelectric ion composite agent is [bpy]FeCl4, the wetting agent uses carbon fatty alcohol polyoxyethylene ether, the leveling agent is polyester-modified silicone oxygen, the dispersant is ammonium polyacrylate, and the coupling agent uses titanate coupling agent.

[0083] The preparation method is as follows: Graphene, the first batch of wetting agent (47% of the total mass of the wetting agent), the first batch of dispersant (42% of the total mass of the dispersant), and water are mixed and stirred at a speed of 4000 rpm and 40 kHz for 2.5 h to obtain a graphene slurry; then epoxy resin, polypropylene resin, the remaining wetting agent, the remaining dispersant, and a leveling agent are mixed and stirred at a speed of 3500 rpm for 1.8 h, and silica, aluminum oxide, and boron nitride are added and mixed for 16 h to obtain a mixed system; the graphene slurry, the mixed system, and the remaining raw materials are mixed for 12 h, and then ground to a particle size of 0.8 μm. After grinding, it is allowed to stand for 3 h to obtain an anti-corrosion nano-deposition liquid.

[0084] The workpiece is magnetically pre-treated and processed at a magnetization voltage of 780 V for 6 s to obtain a pre-treated workpiece. Then the pre-treated workpiece is immersed in the anti-corrosion nano-deposition liquid, and the magnetic force is controlled at 3200 N for 2 h of deposition; then water is used as the circulating liquid, and impurities are removed under the condition of 3200 N for 15 min to obtain a preliminary ceramic workpiece; the preliminary ceramic workpiece is densified at 2600 N and 60 °C for 1.5 h to obtain a densified ceramic workpiece; the densified ceramic workpiece is subjected to gas-phase nano-deposition using the anti-corrosion nano-deposition liquid, with a magnetic force of 2600 N, a temperature of 420 °C, and a time of 2 h to obtain a ceramic-coated workpiece, thus completing the treatment.

[0085] Example 3

[0086] Raw materials with the following mass fractions are configured: 37 parts of silica, 6 parts of aluminum oxide, 3 parts of boron nitride, 3 parts of epoxy resin, 1.1 parts of polypropylene resin, 2.7 parts of a magnetoelectric ion composite agent, 2 parts of graphene, 0.9 parts of a wetting agent, 1 part of a leveling agent, 1.1 parts of a dispersant, 1.4 parts of a coupling agent, and 230 parts of water; among them, the particle size of silica is 30 nm, the particle size of aluminum oxide is 40 nm, the particle size of boron nitride is 70 nm, the epoxy resin is bisphenol A epoxy resin, the magnetoelectric ion composite agent is [bmp]FeCl4, the wetting agent uses a carbon fatty alcohol polyoxyethylene ether, the leveling agent is a polyester-modified silicone oxygen alkane, the dispersant is sodium polyacrylate, and the coupling agent uses a titanate coupling agent.

[0087] The preparation method is as follows: Graphene, the first batch of wetting agents (with a mass of 48% of the total mass of the wetting agents), the first batch of dispersants (with a mass of 41% of the total mass of the dispersants), and water are stirred at a speed of 1500 rpm and 28 kHz for 1 h to obtain a graphene slurry; then epoxy resin, polypropylene resin, the remaining wetting agents, the remaining dispersants, and a leveling agent are mixed and stirred at 1500 rpm for 3 h, and silicon dioxide, aluminum oxide, and boron nitride are added and mixed for 20 h to obtain a mixed system; the graphene slurry, the mixed system, and the remaining raw materials are mixed for 14 h, and then ground to a particle size of 1.7 μm. After grinding, it is left standing for 4 h to obtain an anti-corrosion nano-deposition liquid.

[0088] The workpiece is magnetically pre-treated and processed for 3 s under a magnetizing voltage of 220 V to obtain a pre-treated workpiece. Then the pre-treated workpiece is immersed in the anti-corrosion nano-deposition liquid, and the magnetic force is controlled at 1950 N for 4 h of deposition; then water is used as the circulating liquid, and impurities are removed for 20 min under the condition of 1950 N to obtain a preliminary ceramic workpiece; the preliminary ceramic workpiece is densified at 2500 N and 50 °C for 1.3 h to obtain a densified ceramic workpiece; the densified ceramic workpiece is subjected to gas-phase nano-deposition using the anti-corrosion nano-deposition liquid, with a magnetic force of 3200 N, a temperature of 330 °C, and a time of 2.5 h to obtain a ceramic-coated workpiece, and the treatment is completed.

[0089] Comparative Example 1

[0090] The difference between Comparative Example 1 and Example 1 is that graphene is not added, and the other conditions are the same.

[0091] Comparative Example 2

[0092] The difference between Comparative Example 2 and Example 1 is that silicon dioxide and boron nitride are not added, and aluminum oxide is changed to 36 parts, and the other conditions are the same.

[0093] The coatings of Examples 1 to 3 and Comparative Examples 1 and 2 are subjected to performance tests; the test standard for neutral salt spray test (film thickness 30 μm) / h is GB / T 1771-2007; the test standard for adhesion (pull-off method) / MPa is GB / T 5210-2006; the test standard for water resistance is GB / T 1733-1993; the impact resistance standard is GB / T 1732-2020; the results are recorded in Table 1.

[0094] Table 1 Test Results of Coating Performance

[0095]

[0096] As can be seen from the above examples, the present invention provides an anti-corrosion nano-deposition liquid with excellent performance, which is up to 3800 h under the neutral salt spray test (film thickness 30 μm), and the anti-corrosion performance is significantly improved.

[0097] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An anticorrosive nano-deposition liquid, characterized in that: Prepared from the following raw materials in parts by weight: 20-40 parts of silicon dioxide, 1-7 parts of aluminum oxide, 1-4 parts of boron nitride, 2-3 parts of epoxy resin, 1-2 parts of polypropylene resin, 1-3 parts of magneto-ionic composite agent, 2-8 parts of graphene, 0.5-1 part of wetting agent, 0.5-1 part of leveling agent, 1-1.2 parts of dispersant, 1-1.5 parts of coupling agent, and 150-380 parts of water.

2. The anticorrosive nano-deposition liquid according to claim 1, characterized in that: The magnetic ion complex comprises one or more of [bmim]FeCl4, [bpy]FeCl4, [bmp]FeCl4 and [pbmim](FeCl4)2.

3. The anticorrosive nano-deposition liquid according to claim 1 or 2, characterized in that: The wetting agent comprises alkylphenol polyoxyethylene ether and / or aliphatic alcohol polyoxyethylene ether.

4. The anticorrosive nano-deposition liquid according to claim 3, characterized in that: The leveling agent is polyether-modified organic siloxane and / or polyester-modified organic siloxane.

5. The anticorrosive nano-deposition liquid according to claim 4, characterized in that: The dispersant is one or more of sodium polyacrylate, ammonium polyacrylate and sodium hexametaphosphate; The coupling agent is a silane coupling agent and / or a titanate coupling agent.

6. The method for preparing the anticorrosive nano-sedimentation liquid according to any one of claims 1 to 5, characterized in that: It includes the following steps: (1) mixing graphene, a first wetting agent, a first dispersant and water to obtain a graphene slurry; (2) mixing the epoxy resin, the polypropylene resin, the remaining wetting agent, the remaining dispersant and the leveling agent, and then adding silicon dioxide, aluminum oxide and boron nitride for secondary mixing to obtain a mixed system; (3) The graphene slurry, the mixed system and the remaining raw materials are mixed, and the anti-corrosion nano-deposition liquid is obtained by grinding and composite ultrasonic dispersion.

7. The method for preparing the anticorrosive nano-deposition liquid according to claim 6, characterized in that: The mass of the first batch of wetting agents in step (1) is 40-50% of the mass of the wetting agent; the mass of the first batch of dispersants in step (1) is 40-50% of the mass of the dispersant; The mixing grinding speed in step (1) is 500 to 4800 rpm, the time is 1 to 3.5 hours, and the ultrasonic dispersion frequency is 20 to 80 kHz; The mixing speed in step (2) is 200 to 4000 rpm, and the mixing time is 1 to 3.5 hours; The time of the secondary mixing in step (2) is 12 to 24 hours; The mixing time in step (3) is 12 to 16 hours; the grinding particle size in step (3) is 0.05 to 2 μm.

8. Use of the anticorrosive nano-deposition liquid according to any one of claims 1 to 5 in the preparation of ceramic coatings.

9. The method for using the anticorrosive nano-deposition liquid according to any one of claims 1 to 5 in preparing ceramic coatings, characterized in that: It includes the following steps: (a) subjecting the pretreated workpiece to liquid phase nano deposition in the anti-corrosion nano deposition solution of any one of claims 1 to 5 and then removing impurities to obtain a preliminary ceramic workpiece; (b) densifying the preliminary ceramic workpiece to obtain a densified ceramic workpiece; (c) using the anticorrosive nano-deposition liquid according to any one of claims 1 to 5 to perform vapor phase nano-deposition on the densified ceramic workpiece to obtain a ceramic coating workpiece, thereby completing the treatment.

10. The application method according to claim 9, characterized in that: The magnetic field force of the liquid phase nanodeposition in step (a) is 1800-3600N, and the time is 0.5-5h; In step (a), the circulating fluid for removing impurities is water, the magnetic field force for removing impurities is 1800-3600N, and the time is 10-30min; The magnetic field force of the densification treatment in step (b) is 1800-3600N, the time is 0.5-1.5h, and the temperature is 40-80°C; The magnetic field force of the gas phase nano-deposition in step (c) is 1800-3600N, the time is 0.5-4h, and the temperature is 60-480°C.

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