Anti-abrasion protective coating material for pump body and preparation method of anti-abrasion protective coating material

Abstract

The invention discloses an abrasion-resistant protective coating material for a pump body and a preparation method of the abrasion-resistant protective coating material. The invention discloses an abrasion-resistant protective coating material for a pump body. The abrasion-resistant protective coating material is prepared by mixing an epoxy resin component and an amine curing agent component according to the mass ratio of (1-5): 1, the epoxy resin component comprises composite epoxy resin, a first auxiliary agent and a first filling material, and the mass ratio of the composite epoxy resin to the first auxiliary agent to the first filling material is 100: (17-35): (100-350); the amine curing agent component comprises a compound amine curing agent, a second auxiliary agent and a second filler, and the mass ratio of the compound amine curing agent to the second auxiliary agent to the second filler is 100: (4-11): (50-100). The anti-abrasion performance is excellent, and the good protection effect on erosion of high-speed sand-containing water flow is achieved; the bonding with the metal base surface of the pump body is reliable; and the adjustable range of the protection thickness is wide, the protection thickness can be designed as required within the range of 1.0 mm-20.0 mm, one-time coating is completed, and the coating integrity is good.

Description

Technical Field

[0001] The invention belongs to the technical field of anti-abrasion protective materials, and in particular relates to an anti-abrasion protective coating material for a pump body and a preparation method thereof. Background Art

[0002] The pump station is one of the main facilities in the irrigation area, used to raise the water level. The core equipment, the water pump, will cause cavitation and abrasion to the volute and impeller of the water pump during the water pumping process due to the passage of high-pressure and high-speed water flow, especially the high-speed water flow with a high sand content, causing serious damage to the pump body components.

[0003] Water erosion of water pumps causes serious wear of water pump flow parts, short service life, high energy consumption, low operating efficiency and other problems. The irrigation area pumping station project has suffered greatly, and the situation is even more serious during the annual flood season. Not only do water pumps need major overhauls every year, but their service life is also greatly shortened.

[0004] There are many engineering repair methods for cavitation and abrasion damage to the water pump body, such as metal welding, laser cladding, abrasion protection plates, abrasion protection mortar and other methods. These methods have their own characteristics. For example, metal welding and laser cladding use alloy materials with good abrasion performance, but the maintenance process is complicated and requires special equipment. It may even need to be transported to a professional company for processing. The high temperature during the processing process can easily cause deformation and stress. The abrasion protection plate has good abrasion performance, but it is difficult to install because it is a prefabricated plate. Abrasion protection mortar materials are also a commonly used repair method, but its abrasion resistance needs to be further improved. In addition, its application thickness is difficult to achieve below 0.5mm, which has a great impact on the flow path morphology and output efficiency of the water pump. In addition, the ambient temperature requirements are high during construction, and sometimes the pump body needs to be heated. Summary of the invention

[0005] Based on this, a pump body anti-wear protective coating material and a preparation method thereof are provided to overcome the deficiencies of the prior art.

[0006] To achieve the above object, the present invention adopts the following scheme:

[0007] A pump body anti-wear protective coating material is made by mixing an epoxy resin component and an amine curing agent component in a mass ratio of (1-5):1; wherein: the epoxy resin component includes a composite epoxy resin, a first auxiliary agent, and a first filler, and the mass ratio is 100:(17-35):(100-350); the amine curing agent component includes a composite amine curing agent, a second auxiliary agent, and a second filler, and the mass ratio is 100:(4-11):(50-100).

[0008] Preferably, the composite epoxy resin is formed by mixing epoxy resins of glycidyl ether epoxy resin and glycidyl ester epoxy resin, and the mixing ratio by mass is 100:(20-100); wherein the glycidyl ether epoxy resin includes any one of E51 and E44 epoxy resins; and the glycidyl ester epoxy resin includes any one of glycidyl phthalate and glycidyl tetrahydrophthalate.

[0009] Preferably, the first auxiliary agent includes: a rheological agent, a toughening agent and a coupling agent, and the mass ratio of the rheological agent, the toughening agent and the coupling agent is (5-10): (10-20): (2-5), wherein the rheological agent is fumed silica and soluble castor oil, the toughening agent is a reactive elastomer, and the coupling agent is a silane coupling agent.

[0010] Preferably, the reactive elastomer is any one of epoxy-terminated nitrile rubber and reactive polyurethane.

[0011] Preferably, the silane coupling agent is any one of coupling agent KH-550, coupling agent B-201 and diethylenetriaminemethyltriethoxymethylsilane.

[0012] Preferably, the first filler is a graded anti-wear particle mixed filler, which is composed of a mixture of quartz powder, cast stone powder, quartz sand, silicon carbide, quartz glass beads and glass flakes.

[0013] Preferably, the composite amine curing agent is a mixture of one or more modified polyamines and polyamide-polyamines, wherein the modified polyamine is any one of modified aliphatic polyamines and phenolic amines.

[0014] Preferably, the second auxiliary agent includes an anti-settling agent and a coupling agent, and the weight ratio is (3-8): (1-3), wherein the anti-settling agent is organic bentonite, and the coupling agent is a silane coupling agent.

[0015] Preferably, the second filler includes any one of quartz powder and cast stone powder.

[0016] A method for preparing a pump body anti-abrasion protective coating material comprises the following steps:

[0017] S10. Preparation of epoxy resin component;

[0018] S11. The epoxy resin, the first additive and the first filler of 100 mesh and above are mixed and stirred at high speed for 20 minutes, and the stirring speed is not less than 25m / s;

[0019] S12. Add the first filler below 100 mesh, stir at medium-low speed for 2min, and the stirring speed is about 10m / s;

[0020] S13. Obtaining an epoxy resin component;

[0021] S20. Preparation of amine curing agent component:

[0022] S21. The composite curing agent and the second additive are mixed and stirred at high speed for 20 min, and the stirring speed is not less than 25 m / s;

[0023] S22. Add the second filler and stir at medium-low speed for 5 min at a stirring speed of about 10 m / s;

[0024] S23. Obtaining an amine curing agent group;

[0025] S30. Mix the prepared epoxy resin component and the amine curing agent component in a mass ratio of (1 to 5): 1 to obtain a pump body anti-abrasion protective coating material.

[0026] The technical solution adopted in this application can achieve the following beneficial effects:

[0027] 1. It has excellent anti-abrasion performance and has good protection against erosion by high-speed sand-containing water flow;

[0028] 2. Reliable bonding with the metal base surface of the pump body, and its bonding strength can reach more than 20MPa;

[0029] 3. The protective thickness can be adjusted in a wide range, and the protective thickness can be designed according to needs within the range of 1.0mm to 20.0mm. The coating can be completed in one time, and the coating has good integrity;

[0030] 4. No solvent, no harmful substances; in line with the national GB / T 17219-1998 "Safety Evaluation Standard for Drinking Water Transmission and Distribution Equipment and Protective Materials" requirements;

[0031] 5. Easy to construct, no need to heat the pump body, can be applied within the range of 5℃ ~ 40℃. DETAILED DESCRIPTION

[0032] In order to facilitate understanding of the present application, the present application will be described more comprehensively below. The present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly understood.

[0033] It should be noted that when a device is considered to be "connected" to another device, it may be directly connected to the other device or there may be an intermediate device at the same time. The terms "inside", "top", "upper", "lower", "upper", "lower" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0035] The present application provides an anti-wear protective coating material for a pump body, which is made by mixing an epoxy resin component and an amine curing agent component in a mass ratio of (1-5):1; wherein: the epoxy resin component includes a composite epoxy resin, a first auxiliary agent, and a first filler, and the mass ratio is 100:(17-35):(100-350); the amine curing agent component includes a composite amine curing agent, a second auxiliary agent, and a second filler, and the mass ratio is 100:(4-11):(50-100).

[0036] Composite amine curing agents are organic polyamine compounds widely used as epoxy resin curing agents. There are four types: single polyamine, mixed polyamine, modified polyamine and eutectic mixed polyamine. Single polyamines are mainly fatty amines, alicyclic amines, aromatic amines and polyamides. Fatty amines and polyamides are room temperature curing agents; while aromatic amines need to be heated for curing, and their cured products have much better heat resistance, mechanical strength and corrosion resistance than fatty amines. In terms of heat resistance, the best is aromatic amine curing agent, followed by alicyclic amines, and the worst is polyamide. Fatty amines are highly toxic and irritating, and aromatic amines have a high curing temperature, so they all need to be modified, so there are many modified polyamines, such as epoxide addition polyamines, Michael addition polyamines, aromatic amine mixtures, etc.

[0037] An epoxy resin component is prepared by mixing a composite epoxy resin, a first auxiliary agent and a first filler in a mass ratio of 100:(17-35):(100-350), and an amine curing agent component is prepared by mixing a composite amine curing agent, a second auxiliary agent and a second filler in a mass ratio of 100:(4-11):(50-100). A pump body anti-abrasion protective coating material is prepared by mixing the composite epoxy resin and the amine curing agent component in a weight ratio of (1-5):1. The coating material is applied to a water pump body to test anti-abrasion performance, bonding strength, harmful substance content, construction temperature, etc.

[0038] The technical solution of the pump body anti-abrasion protective coating material used in this application can achieve the following

[0039] Beneficial effects:

[0040] 1. It has excellent anti-abrasion performance and has good protection against erosion by high-speed sand-containing water flow;

[0041] 2. Reliable bonding with the metal base surface of the pump body, and its bonding strength can reach more than 20MPa;

[0042] 3. The protective thickness can be adjusted in a wide range, and the protective thickness can be designed according to needs within the range of 1.0mm to 20.0mm. The coating can be completed in one time, and the coating has good integrity;

[0043] 4. No solvent, no harmful substances; in line with the national GB / T 17219-1998 "Safety Evaluation Standard for Drinking Water Transmission and Distribution Equipment and Protective Materials" requirements;

[0044] 5. Easy to construct, no need to heat the pump body, can be applied within the range of 5℃ ~ 40℃.

[0045] Based on the above scheme, the composite epoxy resin is formed by mixing epoxy resins in glycidyl ether epoxy resins and glycidyl ester epoxy resins, and the mass mixing ratio is 100: (20~100); wherein the glycidyl ether epoxy resin includes any one of E51 and E44 epoxy resins; the glycidyl ester epoxy resin includes any one of glycidyl phthalate and glycidyl tetrahydrophthalate.

[0046] Glycidyl ether epoxy resin is formed by the condensation of active hydrogen-containing phenols or alcohols with epichlorohydrin. Among them, E44 epoxy resin is an important polymer material. Epoxy resin e44 has excellent chemical stability, mechanical properties and heat resistance, and is widely used in coatings, adhesives, electronic materials and other fields. At the same time, epoxy resin e44 can also be blended and modified with other compounds to obtain better performance; E51 epoxy resin is a polymer synthetic material that can be widely used in adhesives, coatings, composite materials and other fields. It is composed of epoxy resin and curing agent, has good chemical stability and mechanical properties, and is a high-performance, high-quality engineering material.

[0047] There are many varieties of glycidyl ester epoxy resins, but the main ones produced industrially are glycidyl phthalate, tetrahydroglycidyl phthalate and hexahydroglycidyl phthalate. Because the molecular structure contains benzene rings and glycidyl ester bonds with strong polarity, in addition to the general properties of epoxy resins, it also has the characteristics of low viscosity, good processability, high reactivity, good compatibility, high bonding strength, good electrical insulation, good ultra-low temperature resistance, surface gloss and light transmittance, and good weather resistance. It can be made into adhesives with excellent performance, has excellent light curing and anaerobic adhesives, and can be used alone or as a diluent; phthalic anhydride is an important basic organic raw material. It is the main raw material for the manufacture of plasticizers, polyester resins and alkyd resins. It can also be used in the production of medicines, dye intermediates, coatings, pesticides, saccharin and other products.

[0048] Furthermore, the first auxiliary agent includes: a rheological agent, a toughening agent and a coupling agent, and the mass ratio of the rheological agent, the toughening agent and the coupling agent is (5-10): (10-20): (2-5), wherein the rheological agent is fumed silica and soluble castor oil, the toughening agent is a reactive elastomer, and the coupling agent is a silane coupling agent.

[0049] Fumed silica (fumed white carbon black) is one of the extremely important high-tech ultrafine inorganic new materials. Due to its small particle size, it has a large specific surface area, strong surface adsorption, large surface energy, high chemical purity, good dispersion performance, and unique properties in thermal resistance and electrical resistance. With its superior stability, reinforcement, thickening and thixotropy, it has unique characteristics in many disciplines and fields and plays an irreplaceable role.

[0050] The rheological agent is a combination of fumed silica and soluble castor oil, which can obtain a good thixotropic effect.

[0051] Specifically, the reactive elastomer is any one of epoxy-terminated nitrile rubber and reactive polyurethane. The silane coupling agent is any one of coupling agent KH-550, coupling agent B-201 and diethylenetriaminemethyltriethoxymethylsilane.

[0052] Silane coupling agent is a kind of organosilicon compound containing two groups of different chemical properties in the molecule at the same time. Its classic product can be expressed by the general formula YSiX3. In the formula, Y is a non-hydrolyzable group (organic functional group), generally vinyl, amino, thiol, epoxy, etc. X is a hydrolyzable group, generally methoxyethoxy and halogen, etc. Due to this special structure, its molecule has both reactive groups that can chemically combine with inorganic materials (such as glass, silica sand, metal, etc.) and reactive groups that can chemically combine with organic materials (synthetic resin, etc.), and can be used for surface treatment.

[0053] It can improve the bonding performance between glass fiber and resin, greatly improve the strength, electrical, water resistance, weather resistance and other properties of glass fiber reinforced composite materials. Even in wet state, it has a significant effect on improving the mechanical properties of composite materials.

[0054] The filler can be surface treated in advance or added directly to the resin. It can improve the dispersibility and adhesion of the filler in the resin, improve the compatibility between the inorganic filler and the resin, improve the process performance and enhance the mechanical, electrical and weather resistance of the filled plastic (including rubber).

[0055] Silane coupling agents can often solve the long-standing problem of some materials being unable to bond. The principle of silane coupling agents as adhesion enhancers is that they have two groups; one group can bond with the bonded skeleton material; and the other group can bond with the polymer material or adhesive, thereby forming a strong chemical bond at the bonding interface, greatly improving the bonding strength. There are generally three ways to apply silane coupling agents: one is as a surface treatment agent for skeleton materials; the second is to add it to adhesives; and the third is to add it directly to polymer materials.

[0056] In the above scheme, the first filler is a graded anti-wear particle mixed filler, which is composed of a mixture of quartz powder, cast stone powder, quartz sand, silicon carbide, quartz glass beads, and glass flakes.

[0057] The first filler is divided into two types of first fillers, namely, those with mesh sizes below 100 and those with mesh sizes above 100, through screening. First fillers with different mesh sizes are added according to different time periods.

[0058] In a preferred embodiment, the composite amine curing agent is a mixture of one or more modified polyamines and polyamide-polyamines, wherein the modified polyamine is any one of modified aliphatic polyamines and phenolic amines.

[0059] Composite amine curing agents are organic polyamine compounds widely used as epoxy resin curing agents. There are four types: single polyamine, mixed polyamine, modified polyamine and eutectic mixed polyamine. Single polyamines are mainly fatty amines, alicyclic amines, aromatic amines and polyamides. Fatty amines and polyamides are room temperature curing agents; while aromatic amines need to be heated for curing, and their cured products have much better heat resistance, mechanical strength and corrosion resistance than fatty amines. In terms of heat resistance, the best is aromatic amine curing agent, followed by alicyclic amines, and the worst is polyamide. Fatty amines are highly toxic and irritating, and aromatic amines have a high curing temperature, so they all need to be modified, so there are many modified polyamines, such as epoxide addition polyamines, Michael addition polyamines, aromatic amine mixtures, etc.

[0060] Based on the above scheme, the second auxiliary agent includes an anti-settling agent and a coupling agent, and the mass ratio is (3-8): (1-3), wherein the anti-settling agent is organic bentonite, and the coupling agent is a silane coupling agent.

[0061] The anti-settling agent is organic bentonite, which needs to be activated in advance. The coupling agent of the second auxiliary agent and the coupling agent of the first auxiliary agent adopt a silane coupling agent with the same structural process.

[0062] Furthermore, the second filler includes any one of quartz powder and cast stone powder.

[0063] Quartz powder is white granular or powdery, with high hardness, high melting point and low thermal expansion coefficient. It has good chemical stability and wear resistance, and can maintain stability at high temperatures. Cast stone powder is an important building material. It is a mixture of quartz, calcium minerals, potassium minerals, etc., and has the advantages of strong durability and good consolidation.

[0064] Based on the above-mentioned pump body anti-abrasion protective coating material, a method for preparing the pump body anti-abrasion protective coating material is provided, comprising the following steps:

[0065] S10. Preparation of epoxy resin component; S11. Mix the epoxy resin, the first auxiliary agent and the first filler of 100 mesh and above, and stir at high speed for 20 minutes, and the stirring speed is not less than 25m / s; S12. Add the first filler of less than 100 mesh, stir at medium-low speed for 2 minutes, and the stirring speed is about 10m / s; S13. Obtain the epoxy resin component;

[0066] S20. Preparation of amine curing agent component: S21. Mix the composite curing agent and the second auxiliary agent and stir at high speed for 20 minutes, and the stirring speed is not less than 25m / s; S22. Add the second filler and stir at medium-low speed for 5 minutes, and the stirring speed is about 10m / s; S23. Obtain the amine curing agent group;

[0067] S30. Mix the prepared epoxy resin component and the amine curing agent component in a mass ratio of (1 to 5): 1 to obtain a pump body anti-abrasion protective coating material.

[0068] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with embodiments.

[0069] Comparative Example 1:

[0070] Step 1: Select a lightweight flame-retardant abradable sealing coating material with good erosion resistance in the prior art, and divide it into 7 samples of the same quality corresponding to Example 1.

[0071] Step 2: Place 2 of the 5 samples in a barrel at 20°C and monitor their status in real time to record their applicable period; select 2 of the remaining 5 samples and test their tensile strength and compressive strength respectively; select 1 of the remaining 3 samples to apply on metal and test the bonding strength with the metal; apply the remaining 2 samples on two anti-erosion test molds with a thickness of 10 mm and test their abrasion strength in an anti-erosion test device. (The data adopts the average value).

[0072] Embodiment 1:

[0073] Step 1, preparation of epoxy resin component: use an electronic scale to weigh 50 parts by mass of E51 epoxy resin, 50 parts by mass of glycidyl phthalate epoxy resin, 10 parts by mass of epoxy-terminated liquid nitrile rubber, 3 parts by mass of fumed silica, 3 parts by mass of soluble castor oil, 2 parts by mass of coupling agent (KH-550) and 60 parts by mass of cast stone powder, put them into a stirring tank, and stir at high speed for 20 minutes; then add 100 parts by mass of silicon carbide fine sand below 100 mesh, stir for 2 minutes, then discharge and package to obtain the epoxy resin component.

[0074] Step 2, preparation of amine curing agent component: use an electronic scale to weigh 50 parts by mass of polyamide curing agent, 50 parts by mass of modified fatty amine curing agent, 5 parts by mass of organic bentonite, 3 parts by mass of ethanol, and 1 part by mass of coupling agent (KH-550), add them into a stirring kettle, and disperse them at high speed for 20 minutes; then add 100 parts by mass of cast stone powder, stir at medium-low speed for 5 minutes, and bucket to obtain the amine curing agent component.

[0075] Step 3: Evenly mix the epoxy resin component and the amine curing agent component in a mass ratio of 3:4 to obtain a water pump erosion protection coating material.

[0076] Step 4: Divide the water pump erosion protection coating material into 7 parts, place 2 parts in a barrel at a temperature of 20°C, and monitor its status in real time to record its applicable period; select 2 parts from the remaining 5 parts, test their tensile strength and compressive strength respectively, select 1 part from the remaining 3 parts to apply on the metal, and test the bonding strength with the metal, and apply the remaining 2 parts on two anti-erosion test molds with a thickness of 10mm, and test their abrasion strength in the anti-erosion test device. (The data adopts the average value) and record (the test results are shown in Table 1).

[0077] Embodiment 2:

[0078] Step 1, preparation of epoxy resin component: use an electronic scale to weigh 50 parts by mass of E51 epoxy resin, 50 parts by mass of glycidyl phthalate epoxy resin, 10 parts by mass of epoxy-terminated liquid nitrile rubber, 3 parts by mass of fumed silica, 3 parts by mass of soluble castor oil, 2 parts by mass of coupling agent (KH-550) and 60 parts by mass of cast stone powder, put them into a stirring tank, and stir at high speed for 20 minutes; then add 100 parts by mass of silicon carbide fine sand below 100 mesh, stir for 2 minutes, then discharge and package to obtain the epoxy resin component.

[0079] Step 2, preparation of amine curing agent component: use an electronic scale to weigh 50 parts by mass of polyamide curing agent, 50 parts by mass of modified fatty amine curing agent, 5 parts by mass of organic bentonite, 3 parts by mass of ethanol, and 1 part by mass of coupling agent (KH-550), add them into a stirring kettle, and disperse them at high speed for 20 minutes; then add 100 parts by mass of cast stone powder, stir at medium-low speed for 5 minutes, and bucket to obtain the amine curing agent component.

[0080] Step 3: Evenly mix the epoxy resin component and the amine curing agent component in a mass ratio of 1:1 to obtain a water pump erosion protection coating material.

[0081] Step 4: Divide the water pump erosion protection coating material into 7 parts, place 2 parts in a barrel at a temperature of 20°C, and monitor its status in real time to record its applicable period; select 2 parts from the remaining 5 parts, test their tensile strength and compressive strength respectively, select 1 part from the remaining 3 parts to apply on the metal, and test the bonding strength with the metal, and apply the remaining 2 parts on two anti-erosion test molds with a thickness of 10mm, and test their abrasion strength in the anti-erosion test device. (The data adopts the average value) and record (the test results are shown in Table 1).

[0082] Embodiment three:

[0083] Step 1, preparation of epoxy resin component: use an electronic scale to weigh 50 parts by mass of E51 epoxy resin, 50 parts by mass of glycidyl phthalate epoxy resin, 10 parts by mass of epoxy-terminated liquid nitrile rubber, 3 parts by mass of fumed silica, 3 parts by mass of soluble castor oil, 2 parts by mass of coupling agent (KH-550) and 60 parts by mass of cast stone powder, put them into a stirring tank, and stir at high speed for 20 minutes; then add 100 parts by mass of silicon carbide fine sand below 100 mesh, stir for 2 minutes, then discharge and package to obtain the epoxy resin component.

[0084] Step 2, preparation of amine curing agent component: use an electronic scale to weigh 50 parts by mass of polyamide curing agent, 50 parts by mass of modified fatty amine curing agent, 5 parts by mass of organic bentonite, 3 parts by mass of ethanol, and 1 part by mass of coupling agent (KH-550), add them into a stirring kettle, and disperse them at high speed for 20 minutes; then add 100 parts by mass of cast stone powder, stir at medium-low speed for 5 minutes, and bucket to obtain the amine curing agent component.

[0085] Step 3: Evenly mix the epoxy resin component and the amine curing agent component in a mass ratio of 3:1 to obtain a water pump erosion protection coating material.

[0086] Step 4: Divide the water pump erosion protection coating material into 7 parts, place 2 parts in a barrel at a temperature of 20°C, and monitor its status in real time to record its applicable period; select 2 parts from the remaining 5 parts, test their tensile strength and compressive strength respectively, select 1 part from the remaining 3 parts to apply on the metal, and test the bonding strength with the metal, and apply the remaining 2 parts on two anti-erosion test molds with a thickness of 10mm, and test their abrasion strength in the anti-erosion test device. (The data adopts the average value) and record (the test results are shown in Table 1).

[0087] Embodiment 4:

[0088] Step 1, preparation of epoxy resin component: weigh 50% E51 epoxy resin using an electronic scale.

[0089] 50 parts by mass of phthalic acid glycidyl ester epoxy resin, 10 parts by mass of terminal epoxy liquid nitrile rubber, 3 parts by mass of fumed silica, 3 parts by mass of soluble castor oil, 2 parts by mass of coupling agent (KH-550) and 60 parts by mass of cast stone powder are put into a stirring kettle and stirred at high speed for 20 minutes; then 100 parts by mass of silicon carbide fine sand below 100 mesh is added, and the mixture is discharged and packaged after stirring for 2 minutes to obtain an epoxy resin component.

[0090] Step 2, preparation of amine curing agent component: weigh polyamide curing agent 50

[0091] 1.5 parts by mass, 50 parts by mass of modified fatty amine curing agent, 5 parts by mass of organic bentonite, 3 parts by mass of ethanol, and 1 part by mass of coupling agent (KH-550) were added into a stirring kettle and dispersed at high speed for 20 minutes;

[0092] Then, 100 parts by weight of cast stone powder was added, stirred at a medium-low speed for 5 minutes, and filled into a barrel to obtain an amine curing agent component.

[0093] Step 3: Evenly mix the epoxy resin component and the amine curing agent component in a mass ratio of 5:1 to obtain a water pump erosion protection coating material.

[0094] Step 4: Divide the water pump erosion protection coating material into 7 parts, place 2 parts in a barrel at a temperature of 20°C, and monitor its status in real time to record its applicable period; select 2 parts from the remaining 5 parts, test their tensile strength and compressive strength respectively, select 1 part from the remaining 3 parts to apply on the metal, and test the bonding strength with the metal, and apply the remaining 2 parts on two anti-erosion test molds with a thickness of 10mm, and test their abrasion strength in the anti-erosion test device. (The data adopts the average value) and record (the test results are shown in Table 1).

[0095] Embodiment five:

[0096] Step 1, preparation of epoxy resin component: weigh 50% E51 epoxy resin using an electronic scale.

[0097] 50 parts by mass of phthalic acid glycidyl ester epoxy resin, 10 parts by mass of terminal epoxy liquid nitrile rubber, 3 parts by mass of fumed silica, 3 parts by mass of soluble castor oil, 2 parts by mass of coupling agent (KH-550) and 60 parts by mass of cast stone powder are put into a stirring kettle and stirred at high speed for 20 minutes; then 100 parts by mass of silicon carbide fine sand below 100 mesh is added, and the mixture is discharged and packaged after stirring for 2 minutes to obtain an epoxy resin component.

[0098] Step 2, preparation of amine curing agent component: use an electronic scale to weigh 50 parts by mass of polyamide curing agent, 50 parts by mass of modified fatty amine curing agent, 5 parts by mass of organic bentonite, 3 parts by mass of ethanol, and 1 part by mass of coupling agent (KH-550), add them into a stirring kettle, and disperse them at high speed for 20 minutes; then add 100 parts by mass of cast stone powder, stir at medium-low speed for 5 minutes, and bucket to obtain the amine curing agent component.

[0099] Step 3: Evenly mix the epoxy resin component and the amine curing agent component in a mass ratio of 6:1 to obtain a water pump erosion protection coating material.

[0100] Step 4: Divide the water pump erosion protection coating material into 7 parts, place 2 parts in a barrel at a temperature of 20°C, and monitor its status in real time to record its applicable period; select 2 parts from the remaining 5 parts, test their tensile strength and compressive strength respectively, select 1 part from the remaining 3 parts to apply on the metal, and test the bonding strength with the metal, and apply the remaining 2 parts on two anti-erosion test molds with a thickness of 10mm, and test their abrasion strength in the anti-erosion test device. (The data adopts the average value) and record (the test results are shown in Table 1).

[0101] Table 1. Test results

[0102]

[0103] The tensile strength, compressive strength and abrasion strength of Examples 2 to 4 are not less than 14MPa, 70MPa and 4h / (g / cm 2 ), which proves that when the mass ratio of epoxy resin component to amine curing agent component is (1-5):1, the tensile strength, compressive strength and abrasion strength are all improved; comparing Example 4 with Comparative Example 1, the tensile strength of Example 4 is increased by 42.9%, the compressive strength is increased by 44.3%, and the abrasion strength is increased by 150%, which shows that when the mass ratio of epoxy resin component to amine curing agent component is 5:1, the effect is best.

[0104] Embodiment 6

[0105] Step 1, preparation of epoxy resin component: use an electronic scale to weigh 40 parts by mass of polyether bisphenol AE44 epoxy resin, 60 parts by mass of glycidyl phthalate epoxy resin, 3 parts by mass of fumed silica, 3 parts by mass of soluble castor oil, and 2 parts by mass of diethylenetriaminemethyltriethoxymethylsilane, put them into a stirring tank, and stir at high speed for 20 minutes; then add 100 parts by mass of silicon carbide fine sand below 100 mesh, 200 parts by mass of silicon carbide medium sand, and 50 parts by mass of silicon carbide coarse sand, stir for 2 minutes, then discharge and package to obtain the epoxy resin component.

[0106] Step 2, preparation of an amine curing agent component: using an electronic scale to weigh 40 parts by mass of a phenolic amine curing agent, 60 parts by mass of a polyamide polyamine curing agent, 5 parts by mass of an organic bentonite, 3 parts by mass of ethanol, and 1 part by mass of diethylenetriaminemethyltriethoxymethylsilane, add them to a stirring kettle, and disperse them at high speed for 20 minutes; then add 100 parts by mass of cast stone powder, stir at medium to low speed for 5 minutes, and bucket to obtain an amine curing agent component.

[0107] Step 3: Evenly mix the epoxy resin component and the amine curing agent component in a mass ratio of 100:20 to obtain a water pump erosion protection coating material.

[0108] Step 4: Divide the water pump erosion protection coating material into 7 parts, place 2 parts in a barrel at a temperature of 20°C, and monitor its status in real time to record its applicable period; select 2 parts from the remaining 5 parts, test their tensile strength and compressive strength respectively, select 1 part from the remaining 3 parts to apply on metal, and test the bonding strength with metal, and apply the remaining 2 parts on two anti-erosion test molds with a thickness of 10mm, and test their abrasion strength in the anti-erosion test device. (The data adopts the average value) and record (the test results are shown in Table 2).

[0109] Embodiment 7

[0110] Step 1, preparation of epoxy resin component: use an electronic scale to weigh 60 parts by mass of polyether bisphenol AE44 epoxy resin, 40 parts by mass of tetrahydrophthalic acid glycidyl ester, 4 parts by mass of fumed silica, 3 parts by mass of soluble castor oil, and 2 parts by mass of coupling agent (B-201), put them into a stirring kettle, and stir at high speed for 20 minutes; then add 40 parts by mass of quartz powder below 100 mesh and 150 parts by mass of glass flakes, stir for 2 minutes, then discharge and package to obtain the epoxy resin component.

[0111] Step 2, preparation of amine curing agent component: use an electronic scale to weigh 70 parts by mass of polyamide polyamine curing agent, 30 parts by mass of modified aliphatic curing agent, 4 parts by mass of organic bentonite, 5 parts by mass of ethanol, and 1 part by mass of coupling agent (B-201), add them into a stirring kettle, and disperse at high speed for 20 minutes; then add 80 parts by mass of glass flakes, stir at medium-low speed for 5 minutes, and put into a barrel to obtain the amine curing agent component.

[0112] Step 3: Evenly mix the epoxy resin component and the amine curing agent component in a mass ratio of 100:20 to obtain a water pump erosion protection coating material.

[0113] Step 4: Divide the water pump erosion protection coating material into 7 parts, place 2 parts in a barrel at a temperature of 20°C, and monitor its status in real time to record its applicable period; select 2 parts from the remaining 5 parts, test their tensile strength and compressive strength respectively, select 1 part from the remaining 3 parts to apply on metal, and test the bonding strength with metal, and apply the remaining 2 parts on two anti-erosion test molds with a thickness of 10mm, and test their abrasion strength in the anti-erosion test device. (The data adopts the average value) and record (the test results are shown in Table 2).

[0114] Table 2. Test results

[0115]

[0116] The tensile strength, compressive strength, metal bonding strength and abrasion resistance of Example 4, Example 6 and Example 7 are all higher than 14MPa, 70MPa and 4h / (g / cm2) of Comparative Example 1. Comparing Example 4, Example 6 and Example 7, the tensile strength of Example 4 is 20MPa at the highest, which is 5.3%, 17.6% and 42.9% higher than that of Example 6, Example 7 and Comparative Example 1. The compressive strength of Example 4 is 100MPa at the highest, which is 17.6%, 11.1% and 42.9% higher than that of Example 6, Example 7 and Comparative Example 1. The abrasion resistance of Example 4 is 10h / (g / cm2 at the highest, which is 25%, 11.1% and 150% higher than that of Example 6, Example 7 and Comparative Example 1. Moreover, the metal bonding strength of Example 4, Example 6 and Example 7 is 20MPa, which is 17.6% higher than that of Comparative Example 1. By comparison, it can be seen that the preparation method and mass ratio of Example 4 have the best effect.

[0117] The above-described embodiments only express the way of equipment layout of the present application, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent application; it should be pointed out that for ordinary technicians in this field, several adjustments and improvements can be made without departing from the concept of the present application, which all belong to the scope of protection of the present application; therefore, the scope of protection of the patent of this application shall be based on the attached claims.

Claims

1. A pump body anti-abrasion protective coating material, characterized in that: The epoxy resin component and the amine curing agent component are mixed in a mass ratio of (1-5):1; wherein: The epoxy resin component comprises a composite epoxy resin, a first auxiliary agent, and a first filler, and the mass ratio is 100: (17-35): (100-350); The amine curing agent component includes a composite amine curing agent, a second auxiliary agent, and a second filler, and the mass ratio is 100: (4-11): (50-100).

2. The pump body anti-wear protective coating material according to claim 1, characterized in that: The composite epoxy resin is formed by mixing epoxy resins in glycidyl ether epoxy resin and glycidyl ester epoxy resin, and the mixing ratio by mass is 100:(20-100); wherein the glycidyl ether epoxy resin includes any one of E51 and E44 epoxy resins; and the glycidyl ester epoxy resin includes any one of glycidyl phthalate and glycidyl tetrahydrophthalate.

3. The pump body anti-abrasion protective coating material according to claim 2, characterized in that: The first auxiliary agent includes: a rheological agent, a toughening agent and a coupling agent, and the mass ratio of the rheological agent, the toughening agent and the coupling agent is (5-10): (10-20): (2-5), wherein the rheological agent is fumed silica and soluble castor oil, the toughening agent is a reactive elastomer, and the coupling agent is a silane coupling agent.

4. The pump body anti-abrasion protective coating material according to claim 3, characterized in that: The reactive elastomer is any one of epoxy-terminated nitrile rubber and reactive polyurethane.

5. The pump body anti-abrasion protective coating material according to claim 3, characterized in that: The silane coupling agent is any one of coupling agent KH-550, coupling agent B-201 and diethylenetriaminemethyltriethoxymethylsilane.

6. The pump body anti-abrasion protective coating material according to claim 5, characterized in that: The first filler is a graded anti-wear particle mixed filler, which is composed of a mixture of quartz powder, cast stone powder, quartz sand, silicon carbide, quartz glass beads and glass flakes.

7. The pump body anti-abrasion protective coating material according to claim 1, characterized in that: The composite amine curing agent is formed by mixing one or more modified polyamines and polyamide-polyamines, wherein the modified polyamine is any one of modified aliphatic polyamines and phenolic amines.

8. The pump body anti-abrasion protective coating material according to claim 1, characterized in that: The second auxiliary agent includes an anti-settling agent and a coupling agent, and the weight ratio is (3-8): (1-3), wherein the anti-settling agent is organic bentonite, and the coupling agent is a silane coupling agent.

9. The pump body anti-wear protective coating material according to claim 1, characterized in that: The second filler includes any one of quartz powder and cast stone powder.

10. A method for preparing the pump body anti-wear protective coating material according to any one of claims 1 to 9, characterized in that: The following steps are involved: S10. Preparation of epoxy resin component; S11. The epoxy resin, the first additive and the first filler of 100 mesh and above are mixed and stirred at high speed for 20 minutes, and the stirring speed is not less than 25m / s; S12. Add the first filler below 100 mesh, stir at medium-low speed for 2min, and the stirring speed is about 10m / s; S13. Obtaining an epoxy resin component; S20. Preparation of amine curing agent component: S21. The composite curing agent and the second additive are mixed and stirred at high speed for 20 min, and the stirring speed is not less than 25 m / s; S22. Add the second filler and stir at medium-low speed for 5 min at a stirring speed of about 10 m / s; S23. Obtaining an amine curing agent group; S30. Mix the prepared epoxy resin component and the amine curing agent component in a mass ratio of (1-5):1 to obtain a pump body anti-abrasion protective coating material.

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