CN111748272A - Preparation method of high cavitation erosion resistance coating - Google Patents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/08—Polyurethanes from polyethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/50—Polyethers having heteroatoms other than oxygen
- C08G18/5021—Polyethers having heteroatoms other than oxygen having nitrogen
- C08G18/5036—Polyethers having heteroatoms other than oxygen having nitrogen containing -N-C=O groups
- C08G18/5048—Products of hydrolysis of polyether-urethane prepolymers containing isocyanate groups
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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
- C09D5/10—Anti-corrosive paints containing metal dust
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/04—Polymer mixtures characterised by other features containing interpenetrating networks
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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Abstract
The invention relates to a preparation method of a high cavitation erosion resistant coating, and belongs to the technical field of cavitation erosion resistant materials. The invention takes titanium-nickel alloy powder as the filler, and the titanium-nickel shape memory alloy has unique properties, such as shape memory property, superelasticity, corrosion resistance, cavitation resistance and biocompatibility; the modified polyurethane elastomer has excellent comprehensive properties of high elasticity, wear resistance, corrosion resistance, high strength and the like, so that the prepared high cavitation erosion resistant coating can absorb huge energy generated instantly when bubbles collapse and convert the huge energy into heat energy to be released through self deformation, and the effect of protecting a base material is achieved.
Description
Technical Field
The invention relates to a preparation method of a high cavitation erosion resistant coating, and belongs to the technical field of cavitation erosion resistant materials.
Background
Cavitation erosion is a common damage form in the operation process of hydraulic buildings and hydraulic machinery, belongs to a special form of abrasion erosion, and is characterized in that high-pressure shock waves or high-speed microjets generated at the moment of violent collapse of bubbles near a flow passage component attack the outer surface of the flow passage component at high frequency and generate larger plastic deformation on the local part of the outer surface of a material, so that the surface of the material is broken to form an erosion pit and expose a new base material. With the increase of cavitation erosion time, the erosion pit gradually increases and deepens, and when the erosion pit expands to a certain degree, the overflowing part can break, so that economic loss and casualties which are difficult to estimate are caused to the production and the life of people.
Cavitation and cavitation phenomena often occur during the operation of hydraulic machinery and hydraulic structures, and the great damage caused by cavitation has been a common concern for people for a long time, so that the problems caused by cavitation and cavitation need to be strictly considered during the design and use.
Cavitation and cavitation phenomena are mainly harmful:
(1) damaging the flow-through components of the turbine. When the water turbine operates, due to the cavitation erosion effect, honeycomb-shaped erosion pits are gradually formed on the surface of the flow passage component, the metal luster is gradually lost, the erosion pits continue to increase and deepen along with the cavitation erosion acting area, and when the cavitation erosion acting area reaches a certain degree, the flow passage component is broken and loses efficacy.
Cavitation erosion reduces the energy parameter. When cavitation erosion develops to a certain degree, the normal flow of fluid is affected by cavitation erosion, so that the energy loss of the fluid is increased, and the output efficiency of the engine body is reduced.
Noise and vibration. The flow passage component is very easy to generate pressure pulsation in a cavitation or cavitation state, the cavitation corrosion seriously restricts the development of water conservancy machinery and hydraulic engineering buildings, and the development of novel cavitation-resistant materials and technologies is urgently needed. At present, in addition to the computer aided design, the manufacturing of the flow passage component according with the fluid mechanics and the operation condition of avoiding the cavitation phenomenon, the development of a novel material with excellent cavitation erosion resistance is carried out, or the surface treatment is carried out on the flow passage part, and the comprehensive performance of the surface of a base material can be improved by an advanced surface treatment technology, so the cavitation erosion damage of the flow passage component can be effectively reduced.
Such pressure pulses are large in amplitude and low in frequency, and may cause strong noise and vibration. When a French high-level-of-life nuclear-powered aircraft carrier tries to navigate in 1999, due to the fact that propellers are cavitation-corroded with great noise, sleeping quality of soldiers is seriously affected.
The mechanical property of the material, the self organization structure of the material, the corrosion resistance, the fluid mechanics design and the like are important factors influencing the cavitation erosion resistance of the material. In order to eliminate or reduce the damage of cavitation erosion to the material, besides utilizing computer-aided design, manufacturing flow passage components meeting the fluid mechanics and controlling the conditions of cavitation generation, adopting the material with excellent cavitation erosion resistance is an effective way to reduce the damage of material cavitation erosion.
Researches prove that the cavitation erosion resistance of the material can be effectively improved by prolonging the cavitation erosion latency of the material. The main ways to prolong the cavitation latency of the material are: the development of a novel material with good cavitation erosion performance is carried out, but the development engineering of the material is huge, the development cost and the manufacturing process cost are expensive, and the product can only be used for core components; the surface of the flow passage component is modified, and a proper surface treatment technology is adopted, so that the material can be effectively prevented from being damaged, and meanwhile, the cost can be reduced.
In recent years, with the development of surface treatment technology and the development of coatings with good cavitation erosion resistance, the cavitation erosion resistance of the flow passage component is greatly improved through the surface treatment technology, and the service life is prolonged. Surface laser
Modification, surface plasma modification, surface thermal spraying, surface nitriding, build-up welding, and the like are frequently used surface treatment techniques. Mitelea et Al effectively improve the cavitation erosion resistance of the alloy by gas nitriding the Ti-6Al-4V alloy at high temperature to form a nitride layer on the surface of the alloy. Chiu K Y and the like use a laser processing technology to alloy the powdered NiTi alloy and the stainless steel AISI316L, and a NiTi alloy coating with the thickness of hundreds of microns is formed on the surface of the stainless steel in an accumulation mode, so that the cavitation corrosion resistance of the stainless steel is effectively improved. Huang W H adopts a plasma surface nitriding technology, so that the surface performance of the base material is improved, and the cavitation corrosion resistance of the carbon steel in the solution is obviously improved. Stella J adopts a surface plasma modification technology to prepare a powdery NiTi alloy into a spray coating, and the content of a non-shape memory phase in the coating is reduced through selection of pre-alloying treatment, so that the high-efficiency cavitation erosion resistant coating is obtained.
In summary, cavitation erosion is a ubiquitous surface damage form in a special wear erosion form, and is caused by the fact that high-pressure shock waves or high-speed microjets generated at the moment of violent collapse of bubbles near the flow passage component impact the surface of the flow passage component at high frequency and cooperate with various kinds of erosion such as mechanical wear, electrochemical erosion, thermodynamics and the like, so that accelerated corrosion damage of the flow passage component is caused.
Cavitation erosion or cavitation can cause huge damage until the overflowing part is damaged, the operation of the machine body is influenced, and great economic loss is caused. At present, in addition to the computer aided design, the manufacturing of the flow passage component according with the fluid mechanics and the avoidance of cavitation conditions, a novel metal material with excellent cavitation erosion resistance is also developed, or the surface treatment is carried out on the flow passage surface, and the advanced surface treatment technology can improve the comprehensive performance of the surface of the base material, thereby effectively reducing the cavitation erosion damage of the flow passage component. But the material research and development project is huge, the research and development cost and the manufacturing process cost are expensive, and the product can only be used for core components; the cavitation resistance needs to be improved, the surface treatment process is complex, the coating cost is high, the requirements on the working environment and the operation level are strict, the coating is difficult to apply to the surface of a large-scale workpiece, the coating is difficult to repair after being damaged, and the coating is difficult to popularize and use in a large area.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the problem that the cavitation erosion resistance of the existing coating needs to be improved, the preparation method of the high cavitation erosion resistance coating is provided.
In order to solve the technical problems, the invention adopts the following technical scheme:
(1) taking polyether polyol 330N, toluene diisocyanate, hydrazine hydrate and a dispersing agent S, mixing the polyether polyol 330N, the hydrazine hydrate and the dispersing agent S, stirring at a high speed to obtain a mixed bottom material, dropwise adding the toluene diisocyanate into the mixed bottom material, continuously stirring to obtain a reactant, and vacuumizing the reactant to obtain polyurea polyol;
(2) mixing diphenylmethane diisocyanate and polyurea polyol, stirring at constant temperature to obtain a mixed material, mixing epoxy resin and the mixed material, continuously stirring for reaction, and cooling to room temperature to obtain a modified elastomer;
(3) mixing the methylene bis-o-chloroaniline, the titanium-nickel alloy powder and the modified elastomer, stirring to obtain a mixed coating, uniformly scraping the mixed coating on a sample plate, and curing to obtain the high cavitation erosion resistance coating.
The polyether polyol 330N, the toluene diisocyanate, the hydrazine hydrate and the dispersant S in the step (1) are respectively in the following proportion: respectively weighing 40-60 parts by weight of polyether polyol 330N, 10-15 parts by weight of toluene diisocyanate, 5-8 parts by weight of hydrazine hydrate and 1-5 parts by weight of dispersing agent S.
The high-speed stirring treatment step in the step (1) is as follows: mixing polyether polyol 330N, hydrazine hydrate and a dispersing agent S, and stirring at a high speed of 1200-1500 r/min for 10-15 min in a nitrogen atmosphere.
The stirring treatment step in the step (1) is as follows: and (3) dropwise adding toluene diisocyanate into the mixed base material, and continuously stirring for 30-60 min at the temperature of 38-44 ℃.
The step (1) of vacuumizing comprises the following steps: and vacuumizing the reactant for 2-3 h at the temperature of 115-125 ℃ and the pressure of-0.095 to-0.098 MPa.
The constant-temperature stirring treatment step in the step (2) is as follows: mixing the diphenylmethane diisocyanate and the polyurea polyol according to the mass ratio of 1: 3, and stirring for 2-3 hours at a constant temperature of 80-90 ℃ and a stirring speed of 600-800 r/min in a nitrogen atmosphere.
The stirring reaction step in the step (2) is as follows: mixing the epoxy resin and the mixed material according to the mass ratio of 1: 3, and continuously stirring and reacting for 3-4 hours at the temperature of 110-120 ℃.
The mass ratio of the methylene bis-o-chloroaniline, the titanium-nickel alloy powder and the modified elastomer in the step (3) is 1: 5.
The stirring treatment step in the step (3) is as follows: mixing methylene bis-o-chloroaniline, titanium-nickel alloy powder and the modified elastomer, and stirring for 2-4 hours at the temperature of 80-90 ℃ and the stirring speed of 800-900 r/min.
The blade coating curing treatment step in the step (3) is as follows: and uniformly coating the mixed coating on a sample plate, curing at room temperature and standing for 6-7 days.
Compared with other methods, the method has the beneficial technical effects that:
(1) the invention prepares the polyurethane elastomer by polyurea polyol prepared by an intermittent method, takes the epoxy resin modified polyurethane elastomer as a raw material and takes titanium-nickel alloy powder as a filler to prepare a high cavitation erosion resistant coating; the polyurea polyol is a branched chain type copolymer polyol formed by the gradual polyaddition reaction of isocyanate and polyamine in the polyol, and the polyurea polyol is prepared by using a dispersing agent S in a batch method, so that the solid content and the stability of the polyurea polyol can be improved, and the viscosity of a reaction system and a product can be reduced; the dispersant is an organic mixture and plays a role in a system as follows: the "dilution" effect: the viscosity of the reaction system is reduced, the full reaction of polyamine and polyisocyanate is facilitated, and unnecessary crosslinking reaction is reduced, such as the generation of excessive polyurethane or polyurea-polyurethane copolymer; the "lubricating" action: the stirring effect is increased, the dispersibility and the particle shape of the polyurea particles are improved, the particles tend to form a smooth spheroidal form through a plasticizing mechanism, and the product viscosity is reduced; the "azeotropic" action: for a system in which hydrazine hydrate participates, the influence of water on a reaction system is eliminated, and the storage stability of the product is improved;
(2) the epoxy resin modified polyurethane elastomer is used as a raw material, the epoxy resin is a thermosetting resin and has the characteristics of excellent adhesion, mechanical strength, electrical insulation, good processing manufacturability and the like, the epoxy resin contains hydroxyl and epoxy groups, and after the epoxy resin reacts with polyurethane, a branch point can be introduced into a polyurethane main chain to form a partial network structure, so that the performance of the polyurethane elastomer is improved; the water resistance and the mechanical property of the epoxy resin modified polyurethane elastomer are obviously improved, because when the grafting reaction occurs between the original polymer components, the polymer has higher network interpenetrating degree, thereby effectively improving the mechanical property of the material; meanwhile, the penetration of water molecules is further hindered through the chemical bond crosslinking between the polymer and the epoxy resin, so that the water permeability coefficient of the material is obviously reduced;
(3) the invention takes titanium-nickel alloy powder as the filler, and the titanium-nickel shape memory alloy has unique properties, such as shape memory property, superelasticity, corrosion resistance, cavitation resistance and biocompatibility; the modified polyurethane elastomer has excellent comprehensive properties of high elasticity, wear resistance, corrosion resistance, high strength and the like, so that the prepared high cavitation erosion resistant coating can absorb huge energy generated instantly when bubbles collapse and convert the huge energy into heat energy to be released through self deformation, and the effect of protecting a base material is achieved.
Detailed Description
Weighing 40-60 parts of polyether polyol 330N, 10-15 parts of toluene diisocyanate, 5-8 parts of hydrazine hydrate and 1-5 parts of dispersing agent S respectively, mixing the polyether polyol 330N, the hydrazine hydrate and the dispersing agent S, stirring at a high speed of 1200-1500 r/min for 10-15 min under a nitrogen atmosphere to obtain a mixed base material, dripping the toluene diisocyanate into the mixed base material, continuously stirring at a temperature of 38-44 ℃ for 30-60 min to obtain a reactant, and vacuumizing the reactant at a temperature of 115-125 ℃ and a pressure of-0.095-0.098 MPa for 2-3 h to obtain polyurea polyol; mixing diphenylmethane diisocyanate and polyurea polyol according to the mass ratio of 1: 3, stirring at the constant temperature of 80-90 ℃ and the stirring speed of 600-800 r/min for 2-3 h under the nitrogen atmosphere to obtain a mixed material, mixing epoxy resin and the mixed material according to the mass ratio of 1: 3, continuously stirring and reacting at the temperature of 110-120 ℃ for 3-4 h, and cooling to room temperature to obtain a modified elastomer; mixing methylene bis-o-chloroaniline, titanium-nickel alloy powder and the modified elastomer according to the mass ratio of 1: 5, stirring at the temperature of 80-90 ℃ and the stirring speed of 800-900 r/min for 2-4 h to obtain a mixed coating, uniformly coating the mixed coating on a sample plate, curing at room temperature, and standing for 6-7 days to obtain the high cavitation erosion resistant coating.
Example 1
Taking polyether polyol 330N, toluene diisocyanate, hydrazine hydrate and a dispersing agent S, mixing the polyether polyol 330N, the hydrazine hydrate and the dispersing agent S, stirring at a high speed to obtain a mixed bottom material, dropwise adding the toluene diisocyanate into the mixed bottom material, continuously stirring to obtain a reactant, and vacuumizing the reactant to obtain polyurea polyol; mixing diphenylmethane diisocyanate and polyurea polyol, stirring at constant temperature to obtain a mixed material, mixing epoxy resin and the mixed material, continuously stirring for reaction, and cooling to room temperature to obtain a modified elastomer; mixing the methylene bis-o-chloroaniline, the titanium-nickel alloy powder and the modified elastomer, stirring to obtain a mixed coating, uniformly scraping the mixed coating on a sample plate, and curing to obtain the high cavitation erosion resistance coating. The proportions of polyether polyol 330N, toluene diisocyanate, hydrazine hydrate and dispersant S are respectively as follows: respectively weighing 40 parts of polyether polyol 330N, 10 parts of toluene diisocyanate, 5 parts of hydrazine hydrate and 1 part of dispersing agent S according to parts by weight. The high-speed stirring treatment steps are as follows: polyether polyol 330N, hydrazine hydrate and a dispersant S are mixed and stirred at a high speed of 1200r/min for 10min under a nitrogen atmosphere. The stirring treatment steps are as follows: toluene diisocyanate was added dropwise to the mixed base material, and stirring was continued at 38 ℃ for 30 min. The vacuumizing step comprises: the reaction mass was evacuated at a temperature of 115 ℃ and a pressure of-0.095 MPa for 2 h. The constant-temperature stirring treatment steps are as follows: mixing the diphenylmethane diisocyanate and the polyurea polyol according to the mass ratio of 1: 3, and stirring for 2 hours at the constant temperature of 80 ℃ and the stirring speed of 600r/min in the nitrogen atmosphere. The stirring reaction steps are as follows: mixing the epoxy resin and the mixed material according to the mass ratio of 1: 3, and continuously stirring and reacting for 3 hours at the temperature of 110 ℃. The mass ratio of the methylene bis-o-chloroaniline to the titanium-nickel alloy powder to the modified elastomer is 1: 5. The stirring treatment steps are as follows: mixing methylene bis-o-chloroaniline, titanium-nickel alloy powder and the modified elastomer, and stirring for 2 hours at the temperature of 80 ℃ and the stirring speed of 800 r/min. The blade coating curing treatment steps are as follows: the mixed paint was spread evenly over the panels, cured at room temperature and left for 6 days.
Example 2
Taking polyether polyol 330N, toluene diisocyanate, hydrazine hydrate and a dispersing agent S, mixing the polyether polyol 330N, the hydrazine hydrate and the dispersing agent S, stirring at a high speed to obtain a mixed bottom material, dropwise adding the toluene diisocyanate into the mixed bottom material, continuously stirring to obtain a reactant, and vacuumizing the reactant to obtain polyurea polyol; mixing diphenylmethane diisocyanate and polyurea polyol, stirring at constant temperature to obtain a mixed material, mixing epoxy resin and the mixed material, continuously stirring for reaction, and cooling to room temperature to obtain a modified elastomer; mixing the methylene bis-o-chloroaniline, the titanium-nickel alloy powder and the modified elastomer, stirring to obtain a mixed coating, uniformly scraping the mixed coating on a sample plate, and curing to obtain the high cavitation erosion resistance coating. The proportions of polyether polyol 330N, toluene diisocyanate, hydrazine hydrate and dispersant S are respectively as follows: respectively weighing 50 parts of polyether polyol 330N, 13 parts of toluene diisocyanate, 7 parts of hydrazine hydrate and 3 parts of dispersing agent S according to parts by weight. The high-speed stirring treatment steps are as follows: polyether polyol 330N, hydrazine hydrate and a dispersant S are mixed and stirred at a high speed of 1350r/min for 13min under a nitrogen atmosphere. The stirring treatment steps are as follows: toluene diisocyanate was added dropwise to the mixed base material, and stirring was continued at 41 ℃ for 45 min. The vacuumizing step comprises: the reaction mass was evacuated at a temperature of 120 ℃ and a pressure of-0.097 MPa for 2.5 h. The constant-temperature stirring treatment steps are as follows: mixing the diphenylmethane diisocyanate and the polyurea polyol according to the mass ratio of 1: 3, and stirring for 2.5 hours at the constant temperature of 85 ℃ and the stirring speed of 700r/min in the nitrogen atmosphere. The stirring reaction steps are as follows: mixing the epoxy resin and the mixed material according to the mass ratio of 1: 3, and continuously stirring and reacting for 3.5 hours at the temperature of 115 ℃. The mass ratio of the methylene bis-o-chloroaniline to the titanium-nickel alloy powder to the modified elastomer is 1: 5. The stirring treatment steps are as follows: mixing methylene bis-o-chloroaniline, titanium-nickel alloy powder and the modified elastomer, and stirring for 3 hours at the temperature of 85 ℃ and the stirring speed of 850 r/min. The blade coating curing treatment steps are as follows: the mixed paint was spread evenly over the panels, cured at room temperature and left for 6 days.
Example 3
Taking polyether polyol 330N, toluene diisocyanate, hydrazine hydrate and a dispersing agent S, mixing the polyether polyol 330N, the hydrazine hydrate and the dispersing agent S, stirring at a high speed to obtain a mixed bottom material, dropwise adding the toluene diisocyanate into the mixed bottom material, continuously stirring to obtain a reactant, and vacuumizing the reactant to obtain polyurea polyol; mixing diphenylmethane diisocyanate and polyurea polyol, stirring at constant temperature to obtain a mixed material, mixing epoxy resin and the mixed material, continuously stirring for reaction, and cooling to room temperature to obtain a modified elastomer; mixing the methylene bis-o-chloroaniline, the titanium-nickel alloy powder and the modified elastomer, stirring to obtain a mixed coating, uniformly scraping the mixed coating on a sample plate, and curing to obtain the high cavitation erosion resistance coating. The proportions of polyether polyol 330N, toluene diisocyanate, hydrazine hydrate and dispersant S are respectively as follows: 60 parts of polyether polyol 330N, 15 parts of toluene diisocyanate, 8 parts of hydrazine hydrate and 5 parts of dispersing agent S are weighed respectively according to parts by weight. The high-speed stirring treatment steps are as follows: polyether polyol 330N, hydrazine hydrate and a dispersant S are mixed and stirred at a high speed of 1500r/min for 15min under a nitrogen atmosphere. The stirring treatment steps are as follows: toluene diisocyanate was added dropwise to the mixed base material, and stirring was continued at 44 ℃ for 60 min. The vacuumizing step comprises: the reaction mass was evacuated at a temperature of 125 ℃ and a pressure of-0.098 MPa for 3 h. The constant-temperature stirring treatment steps are as follows: mixing the diphenylmethane diisocyanate and the polyurea polyol according to the mass ratio of 1: 3, and stirring for 3 hours at the constant temperature of 90 ℃ and the stirring speed of 800r/min in the nitrogen atmosphere. The stirring reaction steps are as follows: mixing the epoxy resin and the mixed material according to the mass ratio of 1: 3, and continuously stirring and reacting for 4 hours at the temperature of 120 ℃. The mass ratio of the methylene bis-o-chloroaniline to the titanium-nickel alloy powder to the modified elastomer is 1: 5. The stirring treatment steps are as follows: mixing methylene bis-o-chloroaniline, titanium-nickel alloy powder and the modified elastomer, and stirring for 4 hours at the temperature of 90 ℃ and the stirring speed of 900 r/min. The blade coating curing treatment steps are as follows: the mixed paint was drawn down evenly on the panels, cured at room temperature and left for 7 days.
The high cavitation erosion resistant coating prepared by the invention is subjected to performance detection, and specific detection results are shown in the following table 1.
The test method comprises the following steps:
the high cavitation erosion resistant coating is used for coating the surface of 316L stainless steel, the cavitation erosion resistance of the high cavitation erosion resistant coating is detected, a cavitation erosion test is carried out for 2 hours on a cavitation erosion testing machine, and the cavitation erosion rate of the high cavitation erosion resistant coating in the embodiments 1-3 is calculated through a formula (1).
V＝(W-W)/(T-T)(1)
V is the cavitation erosion rate, and the unit is mg/h;
w is the cumulative cavitation mass when the cavitation time is T, and the unit is mg;
w is the cumulative cavitation mass when the cavitation time is T, and the unit is mg;
t, T-cavitation erosion time, unit is h.
TABLE 1 cavitation etch rates for 1-2h for examples 1-3 and 316L substrates.
TABLE 1 characterization of high cavitation erosion resistance coating
As can be seen from Table 1, the high cavitation erosion resistant coating prepared by the invention has good cavitation erosion rate and cavitation erosion resistant effect.
Claims (10)
1. A preparation method of a high cavitation erosion resistance coating is characterized by comprising the following specific preparation steps:
(1) taking polyether polyol 330N, toluene diisocyanate, hydrazine hydrate and a dispersing agent S, mixing the polyether polyol 330N, the hydrazine hydrate and the dispersing agent S, stirring at a high speed to obtain a mixed bottom material, dropwise adding the toluene diisocyanate into the mixed bottom material, continuously stirring to obtain a reactant, and vacuumizing the reactant to obtain polyurea polyol;
(2) mixing diphenylmethane diisocyanate and polyurea polyol, stirring at constant temperature to obtain a mixed material, mixing epoxy resin and the mixed material, continuously stirring for reaction, and cooling to room temperature to obtain a modified elastomer;
(3) mixing the methylene bis-o-chloroaniline, the titanium-nickel alloy powder and the modified elastomer, stirring to obtain a mixed coating, uniformly scraping the mixed coating on a sample plate, and curing to obtain the high cavitation erosion resistance coating.
2. The method for preparing a high cavitation erosion resistance coating according to claim 1, wherein: the polyether polyol 330N, the toluene diisocyanate, the hydrazine hydrate and the dispersant S in the step (1) are respectively in the following proportion: respectively weighing 40-60 parts by weight of polyether polyol 330N, 10-15 parts by weight of toluene diisocyanate, 5-8 parts by weight of hydrazine hydrate and 1-5 parts by weight of dispersing agent S.
3. The method for preparing a high cavitation erosion resistance coating according to claim 1, wherein: the high-speed stirring treatment step in the step (1) is as follows: mixing polyether polyol 330N, hydrazine hydrate and a dispersing agent S, and stirring at a high speed of 1200-1500 r/min for 10-15 min in a nitrogen atmosphere.
4. The method for preparing a high cavitation erosion resistance coating according to claim 1, wherein: the stirring treatment step in the step (1) is as follows: and (3) dropwise adding toluene diisocyanate into the mixed base material, and continuously stirring for 30-60 min at the temperature of 38-44 ℃.
5. The method for preparing a high cavitation erosion resistance coating according to claim 1, wherein: the step (1) of vacuumizing comprises the following steps: and vacuumizing the reactant for 2-3 h at the temperature of 115-125 ℃ and the pressure of-0.095 to-0.098 MPa.
6. The method for preparing a high cavitation erosion resistance coating according to claim 1, wherein: the constant-temperature stirring treatment step in the step (2) is as follows: mixing the diphenylmethane diisocyanate and the polyurea polyol according to the mass ratio of 1: 3, and stirring for 2-3 hours at a constant temperature of 80-90 ℃ and a stirring speed of 600-800 r/min in a nitrogen atmosphere.
7. The method for preparing a high cavitation erosion resistance coating according to claim 1, wherein: the stirring reaction step in the step (2) is as follows: mixing the epoxy resin and the mixed material according to the mass ratio of 1: 3, and continuously stirring and reacting for 3-4 hours at the temperature of 110-120 ℃.
8. The method for preparing a high cavitation erosion resistance coating according to claim 1, wherein: the mass ratio of the methylene bis-o-chloroaniline, the titanium-nickel alloy powder and the modified elastomer in the step (3) is 1: 5.
9. The method for preparing a high cavitation erosion resistance coating according to claim 1, wherein: the stirring treatment step in the step (3) is as follows: mixing methylene bis-o-chloroaniline, titanium-nickel alloy powder and the modified elastomer, and stirring for 2-4 hours at the temperature of 80-90 ℃ and the stirring speed of 800-900 r/min.
10. The method for preparing a high cavitation erosion resistance coating according to claim 1, wherein: the blade coating curing treatment step in the step (3) is as follows: and uniformly coating the mixed coating on a sample plate, curing at room temperature and standing for 6-7 days.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115558364A (en) * | 2022-09-27 | 2023-01-03 | 浙江大学 | A kind of hydrogel coating that suppresses cavitation phenomenon and preparation method thereof |
| CN116218347A (en) * | 2022-06-24 | 2023-06-06 | 国家电投集团科学技术研究院有限公司 | Cavitation erosion resistant finish paint and preparation method and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0543753A1 (en) * | 1991-11-21 | 1993-05-26 | Neyrpic | Wear-resistant composite material and method for its manufacture |
| CN1821329A (en) * | 2006-03-20 | 2006-08-23 | 王新成 | Epoxy polyurethane-alkene polymer interpenetrating network anti-corrosion paint |
| CN104039852A (en) * | 2011-05-16 | 2014-09-10 | 亚什兰许可和知识产权有限公司 | Two part polyurea-urethane adhesive with elevated high temperature storage modulus |
| US20150197641A1 (en) * | 2014-01-16 | 2015-07-16 | Jun-young Choi | Cavitation resistant polyurethane compositions and methods of forming coating films using the same |
| CN106117501A (en) * | 2016-07-30 | 2016-11-16 | 淄博德信联邦化学工业有限公司 | Fire-retardant polyurea polylol and preparation method thereof |
| CN107142002A (en) * | 2017-06-09 | 2017-09-08 | 硕投（武汉）高分子技术有限公司 | A kind of anti-cavitation polyurethane elastomer coat of high-adhesive-strength and preparation method thereof |
-
2020
- 2020-07-08 CN CN202010648728.0A patent/CN111748272A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0543753A1 (en) * | 1991-11-21 | 1993-05-26 | Neyrpic | Wear-resistant composite material and method for its manufacture |
| CN1821329A (en) * | 2006-03-20 | 2006-08-23 | 王新成 | Epoxy polyurethane-alkene polymer interpenetrating network anti-corrosion paint |
| CN104039852A (en) * | 2011-05-16 | 2014-09-10 | 亚什兰许可和知识产权有限公司 | Two part polyurea-urethane adhesive with elevated high temperature storage modulus |
| US20150197641A1 (en) * | 2014-01-16 | 2015-07-16 | Jun-young Choi | Cavitation resistant polyurethane compositions and methods of forming coating films using the same |
| CN106117501A (en) * | 2016-07-30 | 2016-11-16 | 淄博德信联邦化学工业有限公司 | Fire-retardant polyurea polylol and preparation method thereof |
| CN107142002A (en) * | 2017-06-09 | 2017-09-08 | 硕投（武汉）高分子技术有限公司 | A kind of anti-cavitation polyurethane elastomer coat of high-adhesive-strength and preparation method thereof |
Non-Patent Citations (4)
| Title |
|---|
| 修玉英等: "聚脲多元醇的合成研究", 《热固性树脂》 * |
| 孙文川等: "《钛科学与工程 第七届全国钛合金学术交流会文集》", 31 January 1991, 中南工业大学出版社 * |
| 崔向红: "环氧树脂改性聚氨酯弹性体的制备", 《化学工程师》 * |
| 陶业立: "抗空蚀弹性体涂层的研制及性能研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116218347A (en) * | 2022-06-24 | 2023-06-06 | 国家电投集团科学技术研究院有限公司 | Cavitation erosion resistant finish paint and preparation method and application thereof |
| CN116218347B (en) * | 2022-06-24 | 2024-02-06 | 国家电投集团科学技术研究院有限公司 | Cavitation erosion resistant finish paint and preparation method and application thereof |
| CN115558364A (en) * | 2022-09-27 | 2023-01-03 | 浙江大学 | A kind of hydrogel coating that suppresses cavitation phenomenon and preparation method thereof |
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