Wear-resistant and corrosion-resistant metal part and surface treatment process thereof

Abstract

The application discloses a wear-resistant and corrosion-resistant metal piece and a surface treatment process thereof, and relates to the technical field of surface treatment processes.The surface treatment process comprises the following steps: S1, pretreating the surface of the metal piece for standby; S2, spraying coating A on the surface of the pretreated metal piece, performing ultraviolet curing for 5-6 minutes in a nitrogen atmosphere, forming coating A, performing oxygen plasma treatment on the surface of coating A for 5-6 minutes, spin coating coating B on the surface of coating A, evaporating solvents in a 60-62 DEG C environment in a nitrogen atmosphere, and performing ultraviolet curing for 10-30 minutes to obtain coating B, thereby obtaining the wear-resistant and corrosion-resistant metal piece.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of surface treatment process, in particular to a wear-resistant and corrosion-resistant metal part and a surface treatment process thereof. BACKGROUND

[0002] In modern industrial production, metal parts are widely used in various machines, equipment and building structures due to their high strength and good electrical and thermal conductivity. However, metal materials are often affected by wear and corrosion in actual use, which leads to performance degradation and shortens the service life. Especially in some harsh environments, such as marine, chemical and mining fields, the wear and corrosion of metal parts are particularly prominent. Therefore, developing metal parts with excellent wear and corrosion resistance has become the focus of industry development.

[0003] Traditional surface treatment processes for metal parts, such as electroplating and spraying, can improve the wear and corrosion resistance of metal parts to some extent, but often result in the loss of metal surface gloss, affecting the appearance and functionality. With the increasing demand for high-performance metal parts, there is an urgent need for a surface treatment technology that can improve the wear and corrosion resistance of metal while retaining the original gloss of the metal part.

[0004] The present application provides a wear-resistant and corrosion-resistant metal part and a surface treatment process thereof. Through specific process steps and material selection, the prepared metal part has excellent wear and corrosion resistance. At the same time, the process design forms a protective layer with a high contact angle on the metal surface, which not only effectively reduces the contact area of corrosive media, but also maintains the gloss of the metal part surface, thereby achieving a balance between functionality and aesthetics. SUMMARY

[0005] The present application aims to provide a wear-resistant and corrosion-resistant metal part and a surface treatment process thereof to solve the problems in the prior art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A surface treatment process for a wear-resistant and corrosion-resistant metal part, comprising the following steps: S1: adding ferric chloride to methanol, stirring uniformly, adding concentrated hydrochloric acid, petroleum ether and toluene in sequence, stirring uniformly, adding the uniformly stirred mixture to a petroleum ether solution of trichlorosilane through a pressure equalizing dropping funnel under stirring, stirring and reacting for 30-45 min, separating the organic layer, adding anhydrous potassium carbonate and anhydrous calcium chloride to the organic matter, stirring at room temperature for 12-14 h, filtering, rotary evaporation and concentration of the filtered solution to obtain hydrogen-based silsesquioxane;

[0008] Furthermore, the proportion of each component in the preparation process of the hydrogen silsesquioxane includes, by mass fraction: 140-160 parts of ferric chloride, 200-240 parts of methanol, 100-105 parts of concentrated hydrochloric acid, 1750-2000 parts of petroleum ether, 250-300 parts of toluene, and 100-110 parts of trichlorosilane;

[0009] S2: Add hydrogen silsesquioxane and a magnetic bar to a reaction vessel, dry, then add toluene and allyl glycidyl ether in sequence, stir evenly, add Karstedt catalyst, stir and react for 30-45 minutes, heat to 95°C and keep the reaction temperature for 36-40 hours, and remove the solvent and allyl glycidyl ether under reduced pressure to obtain glycidyl ether propyl POSS;

[0010] Furthermore, the proportion of each component in the preparation process of the glycidyl ether propyl POSS includes, by mass fraction: 1-1.5 parts of hydrogen silsesquioxane, 10-12 parts of toluene, 3-4 parts of allyl glycidyl ether, and 0.005-0.006 parts of Karstedt catalyst;

[0011] S3: Add glycidyl ether propyl POSS, perfluorononanoic acid, and tetrabutylammonium bromide to 1,4-dioxane, heat and reflux for 8-9 hours, cool to room temperature, remove the solvent by rotary evaporation, add the product to chloroform, stir evenly, separate the organic layer, wash the organic layer with 0.1M sodium bicarbonate solution, dry the organic layer with anhydrous magnesium sulfate, filter, remove the solvent by rotary evaporation, add the crude product to acetonitrile, stir evenly, filter, and dry in vacuo to obtain fluoroalkyl-modified glycidyl ether propyl POSS;

[0012] Furthermore, the proportion of each component in the preparation process of the fluoroalkyl-modified glycidyl ether propyl POSS, by mass fraction, includes: glycidyl ether propyl POSS 1-2 parts, perfluorononanoic acid 0.15-0.2 parts, tetrabutylammonium bromide 0.015-0.016 parts;

[0013] S4: 3-mercaptopropyltrimethoxysilane and concentrated hydrochloric acid were added to methanol, heated to 90-92°C for 24 hours, the crude product was washed with methanol, and the crude product was added to dichloromethane, stirred evenly, washed with deionized water, and the organic layer was separated. The organic layer was dried over anhydrous sodium sulfate and concentrated by rotary evaporation to obtain mercaptopropyl POSS;

[0014] Furthermore, the proportion of each component in the preparation process of the mercaptopropyl POSS includes, by mass fraction: 15-20 parts of 3-mercaptopropyltrimethoxysilane, 30-35 parts of concentrated hydrochloric acid, and 360-400 parts of methanol;

[0015] S5: Tridecafluorooctyl methacrylate and photoinitiator 907 were added to tetrahydrofuran and stirred to obtain solution A; mercaptopropyl POSS was added to tetrahydrofuran and stirred to obtain solution B; under a nitrogen atmosphere, solution A was added to solution B, and the mixture was stirred under ultraviolet light for 6-7 hours, filtered, and the solvent was removed by rotary evaporation. The product was added to anhydrous ethanol, centrifuged, washed with anhydrous ethanol, and vacuum dried at 50°C for 24-36 hours to obtain fluoroalkyl-modified mercaptopropyl POSS;

[0016] Furthermore, the proportion of each component in the preparation process of the fluoroalkyl-modified mercaptopropyl POSS includes, by mass fraction: 4.8-5.6 parts of tridecafluorooctyl methacrylate, 9070.05-0.06 parts of photoinitiator, and 2.69-2.88 parts of mercaptopropyl POSS;

[0017] S6: Hexanediol diacrylate and photoinitiator 907 were added to epoxy resin in sequence and stirred evenly. The mixture was added to tetrahydrofuran and stirred evenly. Fluoroalkyl-modified mercapto POSS, PDMS-modified glycidyl ether propyl POSS, and ethanol were added in sequence and ultrasonically dispersed for 1 hour and stirred evenly to obtain coating A.

[0018] Furthermore, the proportion of each component in the preparation process of the coating A includes, by mass, 8-16 parts of epoxy resin, 2-4 parts of hexanediol diacrylate, 0.02-0.04 parts of photoinitiator 907, 3.2-6.4 parts of fluoroalkyl-modified mercapto POSS, 0.5-1 parts of PDMS-modified glycidyl ether propyl POSS, 710-1420 parts of tetrahydrofuran, and 178-355 parts of ethanol;

[0019] Furthermore, the amount of the fluoroalkyl-modified mercapto POSS added is 40-41% of the mass of the epoxy resin:

[0020] Furthermore, the amount of ethanol added is 25-26% of the mass of tetrahydrofuran;

[0021] Furthermore, the PDMS-modified glycidyl ether propyl POSS is prepared by reacting PDMS with an amino group at the end with an excess of glycidyl ether propyl POSS;

[0022] Furthermore, the molecular weight of the PDMS with an amino group at the end includes 2000;

[0023] S7: adding glycidyl ether propyl POSS and fluoroalkyl modified glycidyl ether propyl POSS to butanone, stirring evenly, adding triarylsulfonium hexafluoroantimonate mixture, stirring evenly, to obtain coating B;

[0024] Furthermore, the proportion of each component in the preparation process of the coating B includes, by mass, 8-10 parts of glycidyl ether propyl POSS, 0.52-0.64 parts of fluoroalkyl modified glycidyl ether propyl POSS, 0.28-0.35 parts of triarylsulfonium hexafluoroantimonate mixture, and 200-240 parts of butanone;

[0025] S8: Pre-treat the surface of the metal parts for standby use;

[0026] S9: Spray coating A on the surface of the pretreated metal part, and UV cure it for 5-6 minutes under a nitrogen atmosphere to form coating A; treat the surface of coating A with oxygen plasma for 5-6 minutes, spin-coat coating B on the surface of coating A, evaporate the solvent in a nitrogen atmosphere at 60-62°C, and UV cure it for 10-30 minutes to obtain coating B, thereby obtaining a wear-resistant and corrosion-resistant metal part.

[0027] Furthermore, the specific operation steps of the coating A spraying process include a spray gun caliber of 1.0-1.1 mm, a tassel of 0.25-0.28 mL / s, a compressed air pressure of 0.6-0.62 MPa, a distance between the pretreated metal surface and the spray gun nozzle of 25-27 cm, an "S"-shaped spraying during the spraying process, and a spray gun movement rate of 2.8-3 cm / s;

[0028] Furthermore, during the UV curing process of the coating A, the light source includes a 1000W high-pressure mercury lamp, and the distance between the metal surface and the light source is 28-30 cm;

[0029] Furthermore, the thickness of the coating A is 8-12 μm;

[0030] Furthermore, the concentration of coating B during the spin coating process is 4-5 wt %;

[0031] Furthermore, during the UV curing process of the coating B, the light source includes a 500W mercury lamp, and the light source is irradiated onto the surface of the coating A through a 300nm filter.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The present invention controls the addition amount of fluoroalkyl-modified thiol POSS and ethanol in coating A. Based on the characteristic that tetrahydrofuran is more volatile than ethanol, when tetrahydrofuran volatilizes, the incompletely volatilized ethanol remaining in coating A can induce the distance of fluoroalkyl-modified thiol POSS to form relatively large particles. This characteristic is utilized to first form a rough hydrophobic coating with a micro-nano composite structure on the surface of the metal part. On the one hand, the fluoroalkyl group itself gives it the property of low surface energy. On the other hand, the patchwork depression structure formed by the relatively large particles provides mechanical locking properties for coating B. Combined with the joint action of oxygen plasma, even super-hydrophobicity and low surface energy can make the coating have excellent firmness, which is different from the traditional surface roughness treatment of metal parts and retains the original gloss of the metal part surface.

[0034] 2. The present invention further controls the concentration of coating B so that it can be filled in the concave structure on the surface of coating A, but can still expose most of the micro-nano cluster structure of coating A, while maintaining the excellent hydrophobicity of the coating, enhancing the wear resistance of the coating. When the micro-nano cluster top of coating A is partially worn away, the coating B filled in the depression of coating A is exposed, and the fluoroalkyl-modified glycidyl ether propyl POSS and glycidyl ether propyl POSS in coating B maintain the hydrophobicity of the coating. At the same time, the hydrophobic region area increases after friction, further ensuring the hydrophobicity of the coating, thereby achieving the purpose of enhancing the wear resistance of the coating. DETAILED DESCRIPTION

[0035] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0036] In the following examples, all materials were purchased from common commercial sources.

[0037] The preparation process of hydrogen silsesquioxane comprises the following steps: adding 140 parts of ferric chloride to 200 parts of methanol, stirring evenly, sequentially adding 100 parts of concentrated hydrochloric acid, 1750 parts of petroleum ether, and 250 parts of toluene, stirring evenly, adding the evenly stirred mixture to a petroleum ether solution of 100 parts of trichlorosilane through a pressure-equalizing dropping funnel under stirring, stirring and reacting for 30 minutes, separating the organic layer, adding 50 parts of anhydrous potassium carbonate and 50 parts of anhydrous calcium chloride to the organic matter, stirring at room temperature for 12 hours, filtering, and concentrating the filtered solution by rotary evaporation to obtain hydrogen silsesquioxane.

[0038] The preparation process of glycidyl ether propyl POSS comprises the following steps: adding 1 part of hydrogen silsesquioxane and a magnetic bar into a reaction container, drying, sequentially adding 10 parts of toluene and 3 parts of allyl glycidyl ether, stirring evenly, adding 0.005 parts of Karstedt catalyst, stirring for 30 minutes, heating to 95°C and keeping the temperature for 36 hours, and removing the solvent and allyl glycidyl ether under reduced pressure to obtain glycidyl ether propyl POSS.

[0039] The preparation process of mercaptopropyl POSS includes the following steps: adding 15 parts of 3-mercaptopropyltrimethoxysilane and 30 parts of concentrated hydrochloric acid to methanol, heating to 90°C for reaction for 24 hours, washing the crude product with 360 parts of methanol, adding the crude product to 100 parts of dichloromethane, stirring evenly, washing with deionized water, separating the organic layer, drying the organic layer with anhydrous sodium sulfate, and concentrating by rotary evaporation to obtain mercaptopropyl POSS.

[0040] The preparation process of fluoroalkyl-modified glycidyl ether propyl POSS comprises the following steps: adding 1 part of glycidyl ether propyl POSS, 0.15 parts of perfluorononanoic acid, and 0.015 parts of tetrabutylammonium bromide to 5 parts of 1,4-dioxane, heating and refluxing for 8 hours, cooling to room temperature, removing the solvent by rotary evaporation, adding the product to chloroform, stirring evenly, separating the organic layer, washing the organic layer with 0.1M sodium bicarbonate solution, drying the organic layer with anhydrous magnesium sulfate, filtering, removing the solvent by rotary evaporation, adding the crude product to acetonitrile, stirring evenly, filtering, and vacuum drying to obtain fluoroalkyl-modified glycidyl ether propyl POSS.

[0041] The preparation process of fluoroalkyl-modified mercaptopropyl POSS comprises the following steps: adding 4.8 parts of tridecafluorooctyl methacrylate and 0.05 parts of photoinitiator 907 to 10 parts of tetrahydrofuran, stirring evenly to obtain solution A; adding 2.69 parts of mercaptopropyl POSS to 10 parts of tetrahydrofuran, stirring evenly to obtain solution B; adding solution A to solution B under a nitrogen atmosphere, stirring and reacting for 6 hours under ultraviolet light, filtering, and removing the solvent by rotary evaporation; adding the product to anhydrous ethanol, centrifuging, washing with anhydrous ethanol, and vacuum drying at 50°C for 24 hours to obtain fluoroalkyl-modified mercaptopropyl POSS.

[0042] Example 1: A surface treatment process for wear-resistant and corrosion-resistant metal parts: S1: 2 parts of hexanediol diacrylate and 0.02 parts of photoinitiator 907 are sequentially added to 8 parts of epoxy resin and stirred evenly. The mixture is added to 710 parts of tetrahydrofuran and stirred evenly. 3.2 parts of fluoroalkyl-modified mercapto POSS, 0.5 parts of PDMS-modified glycidyl ether propyl POSS, and 178 parts of ethanol are sequentially added, ultrasonically dispersed, and stirred evenly to obtain coating A.

[0043] S2: 8 parts of glycidyl ether propyl POSS and 0.52 parts of fluoroalkyl-modified glycidyl ether propyl POSS were added to 200 parts of butanone and stirred evenly, and 0.28 parts of triarylsulfonium hexafluoroantimonate mixture was added and stirred evenly to obtain coating B;

[0044] S3: Pre-treat the surface of the metal parts for standby use;

[0045] S4: Coating A was sprayed onto the surface of the pretreated metal part and UV-cured for 5 minutes under a nitrogen atmosphere to form coating A. The surface of coating A was treated with oxygen plasma for 5 minutes, and coating B was spin-coated on the surface of coating A. The solvent was evaporated at 60°C under a nitrogen atmosphere and UV-cured for 10 minutes to obtain coating B, thereby obtaining a wear-resistant and corrosion-resistant metal part. Coating A had a thickness of 8 μm and a concentration of coating B of 4.26 wt%.

[0046] Example 2: A surface treatment process for wear-resistant and corrosion-resistant metal parts: S1: 4 parts of hexanediol diacrylate and 0.04 parts of photoinitiator 907 are sequentially added to 16 parts of epoxy resin and stirred evenly. The mixture is added to 1420 parts of tetrahydrofuran and stirred evenly. 6.4 parts of fluoroalkyl-modified mercapto POSS, 1 part of PDMS-modified glycidyl ether propyl POSS, and 355 parts of ethanol are sequentially added, ultrasonically dispersed, and stirred evenly to obtain coating A.

[0047] S2: 10 parts of glycidyl ether propyl POSS and 0.64 parts of fluoroalkyl-modified glycidyl ether propyl POSS were added to 240 parts of butanone and stirred evenly, and 0.35 parts of triarylsulfonium hexafluoroantimonate mixture was added and stirred evenly to obtain coating B;

[0048] S3: Pre-treat the surface of the metal parts for standby use;

[0049] S4: Coating A was sprayed onto the surface of the pretreated metal part and UV-cured for 5 minutes under a nitrogen atmosphere to form coating A. The surface of coating A was treated with oxygen plasma for 5 minutes, and coating B was spin-coated on the surface of coating A. The solvent was evaporated at 60°C under a nitrogen atmosphere and UV-cured for 10 minutes to obtain coating B, thereby obtaining a wear-resistant and corrosion-resistant metal part. Coating A had a thickness of 12 μm and a concentration of coating B of 4.43 wt%.

[0050] Comparative Example 1: A surface treatment process for wear-resistant and corrosion-resistant metal parts: S1: 2 parts of hexanediol diacrylate and 0.02 parts of photoinitiator 907 were sequentially added to 8 parts of epoxy resin and stirred evenly. The mixture was added to 710 parts of tetrahydrofuran and stirred evenly. 2.4 parts of fluoroalkyl-modified mercapto POSS, 0.5 parts of PDMS-modified glycidyl ether propyl POSS, and 178 parts of ethanol were sequentially added, ultrasonically dispersed, and stirred evenly to obtain coating A.

[0051] The remaining steps are the same as in Example 1.

[0052] Comparative Example 2: A surface treatment process for a wear-resistant and corrosion-resistant metal part: S1: 2 parts of hexanediol diacrylate, 0.02 parts of photoinitiator 907 were added to 8 parts of epoxy resin in turn, stirred uniformly, the mixture was added to 710 parts of tetrahydrofuran, stirred uniformly, 4 parts of fluoroalkyl modified mercaptan POSS, 0.5 parts of PDMS modified glycidyl ether propyl POSS, 178 parts of ethanol were added in turn, ultrasonic dispersion, stirring uniformly, to obtain coating A;

[0053] The remaining steps are the same as in Example 1.

[0054] Comparative Example 3: A surface treatment process for a wear-resistant and corrosion-resistant metal part: S1: 2 parts of hexanediol diacrylate, 0.02 parts of photoinitiator 907 were added to 8 parts of epoxy resin in turn, stirred uniformly, the mixture was added to 710 parts of tetrahydrofuran, stirred uniformly, 3.2 parts of fluoroalkyl modified mercaptan POSS, 0.5 parts of PDMS modified glycidyl ether propyl POSS, 142 parts of ethanol were added in turn, ultrasonic dispersion, stirring uniformly, to obtain coating A;

[0055] The remaining steps are the same as in Example 1.

[0056] Comparative Example 4: A surface treatment process for a wear-resistant and corrosion-resistant metal part: S1: 2 parts of hexanediol diacrylate, 0.02 parts of photoinitiator 907 were added to 8 parts of epoxy resin in turn, stirred uniformly, the mixture was added to 710 parts of tetrahydrofuran, stirred uniformly, 3.2 parts of fluoroalkyl modified mercaptan POSS, 0.5 parts of PDMS modified glycidyl ether propyl POSS, 213 parts of ethanol were added in turn, ultrasonic dispersion, stirring uniformly, to obtain coating A;

[0057] The remaining steps are the same as in Example 1.

[0058] Comparative Example 5: A surface treatment process for a wear-resistant and corrosion-resistant metal part: S2: 6 parts of glycidyl ether propyl POSS, 0.39 parts of fluoroalkyl modified glycidyl ether propyl POSS were added to 200 parts of methyl ethyl ketone, stirred uniformly, 0.28 parts of triaryl sulfonium hexafluoroantimonate mixture was added, stirred uniformly, to obtain coating B;

[0059] S3: The surface of the metal part was pretreated and ready for use;

[0060] S4: The coating A is sprayed on the surface of the pretreated metal piece, and is ultraviolet cured for 5 min under a nitrogen atmosphere to form a coating A; the surface of the coating A is subjected to oxygen plasma treatment for 5 min, the coating B is spin coated on the surface of the coating A, the solvent is evaporated in a 60°C environment under a nitrogen atmosphere, and ultraviolet curing is performed for 10 min to obtain a coating B, thereby obtaining a wear-resistant and corrosion-resistant metal piece. The thickness of the coating A is 8 μm; the concentration of the coating B is 3.2 wt%.

[0061] The remaining steps are the same as those in Example 1.

[0062] Comparative Example 6: A surface treatment process of a wear-resistant and corrosion-resistant metal piece: S2: 12 parts of glycidyl ether propyl POSS and 0.78 parts of fluoroalkyl-modified glycidyl ether propyl POSS are added into 200 parts of methyl ethyl ketone, stirred uniformly, 0.28 parts of triaryl sulfonium hexafluoroantimonate is added, stirred uniformly, and a coating B is obtained;

[0063] S3: The surface of the metal piece is pretreated for standby;

[0064] S4: The coating A is sprayed on the surface of the pretreated metal piece, and is ultraviolet cured for 5 min under a nitrogen atmosphere to form a coating A; the surface of the coating A is subjected to oxygen plasma treatment for 5 min, the coating B is spin coated on the surface of the coating A, the solvent is evaporated in a 60°C environment under a nitrogen atmosphere, and ultraviolet curing is performed for 10 min to obtain a coating B, thereby obtaining a wear-resistant and corrosion-resistant metal piece. The thickness of the coating A is 8 μm; the concentration of the coating B is 6.39 wt%.

[0065] The remaining steps are the same as those in Example 1.

[0066] Experiment: Wear resistance test: The wear-resistant and corrosion-resistant metal pieces prepared in the above examples and comparative examples are subjected to wear resistance test using a wear tester, the friction head is SDC standard friction cloth, the load is 100 g, and the contact angle of the wear-resistant and corrosion-resistant metal piece is measured after reciprocating friction for 300 times.

[0067] Corrosion resistance test: The wear-resistant and corrosion-resistant metal pieces prepared in the above examples and comparative examples are immersed in a hydrochloric acid solution with a pH of 1 and a sodium hydroxide solution with a pH of 14 for 24 h, dried, and then the contact angle of the wear-resistant and corrosion-resistant metal piece is measured.

[0068] Light transmittance test: The coatings A and B prepared in the above examples and comparative examples were used to prepare light transmittance test samples using the following method. The specific steps include: spraying coating A onto the surface of a polycarbonate plate, and UV curing for 5-6 minutes under a nitrogen atmosphere to form coating A; treating the surface of coating A with oxygen plasma for 5-6 minutes, spin-coating coating B onto the surface of coating A, evaporating the solvent in a nitrogen atmosphere at 60-62°C, and UV curing for 10-30 minutes to obtain coating B, thereby obtaining light transmittance test samples. Coating A had a thickness of 8 μm and a concentration of coating B of 4.26 wt%. The light transmittance of the coating was tested using a UV spectrophotometer.

[0069] The specific test data are shown in Table 1 below.

[0070] Table 1 Wear-resistant and corrosion-resistant metal parts performance test data

[0071]

[0072] Conclusion: The wear-resistant and corrosion-resistant metal parts prepared by the surface treatment process of the present invention have excellent wear resistance and corrosion resistance, while being able to retain the metal's own luster.

[0073] In comparative example 1, the amount of fluoroalkyl-modified mercapto POSS is too little, the average surface roughness of coating A is reduced, the micron cluster structure is not obvious, the gap between the micron cluster structure is large, and the mechanical locking performance between coating A and coating B is reduced, resulting in reduced wear resistance.

[0074] In comparative example 2, the fluoroalkyl-modified mercapto POSS has an increased average surface roughness of coating A and a reduced gap between micron cluster structures. During the spin coating process of coating B with the same concentration, the smaller POSS in coating B easily fills and covers most of the micron cluster structures of coating A, resulting in a decrease in the number of surface microstructures and a decrease in the contact angle. At the same time, due to the large-sized particles formed in coating A due to the ethanol-induced aggregation, the transmittance is reduced.

[0075] In comparative example 3, the amount of ethanol was too little, and the microstructures formed by the POSS in coating A during the ethanol-induced aggregation were mainly nanoscale structures, which could not hold up the water droplets, resulting in a decrease in the contact angle.

[0076] In Comparative Example 4, there was too much ethanol, and large particle structures were formed on the surface of coating A, and the number of surface microstructures was reduced, resulting in a lower contact angle.

[0077] In comparative example 5, the concentration of coating B is too low, and the smaller hydrophobic POSS filled in the depression of the microstructure on the surface of coating A is too far away from the top of the micron cluster structure formed by coating A. As a result, when the top of the micron cluster structure is partially worn away, the hydrophobic POSS in the depression cannot be exposed, and the area of ​​the hydrophobic region after friction cannot be increased, resulting in reduced wear resistance.

[0078] In comparative example 6, the concentration of coating B is too high, resulting in the complete filling of the surface microstructure of coating A. The coating no longer presents a structure with a gradient refractive index. After spin coating, coating B forms a micron-level flat coating on the surface of coating A, resulting in a decrease in light transmittance.

[0079] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

Claims

1. A surface treatment process for wear-resistant and corrosion-resistant metal parts, characterized by: The following steps are involved: S1: Hexanediol diacrylate and photoinitiator 907 were sequentially added to epoxy resin and stirred evenly. The mixture was added to tetrahydrofuran and stirred evenly. Fluoroalkyl-modified mercapto POSS, PDMS-modified glycidyl ether propyl POSS, and ethanol were sequentially added, ultrasonically dispersed, and stirred evenly to obtain coating A. S2: adding glycidyl ether propyl POSS and fluoroalkyl modified glycidyl ether propyl POSS to butanone, stirring evenly, adding triarylsulfonium hexafluoroantimonate mixture, stirring evenly, to obtain coating B; S3: Pre-treat the surface of the metal parts for standby use; S4: spray coating A onto the surface of the pretreated metal part, and UV-curing for 5-6 minutes under a nitrogen atmosphere to form coating A; The surface of coating A is treated with oxygen plasma for 5-6 minutes, coating B is spin-coated on the surface of coating A, the solvent is evaporated in a nitrogen atmosphere at 60-62°C, and UV curing is performed for 10-30 minutes to obtain coating B, thereby obtaining a wear-resistant and corrosion-resistant metal part; The metal surface pretreatment step includes grinding and degreasing. The grinding step includes grinding the surface of the metal part using a grinder, wherein the abrasive in the grinder includes any one of artificial corundum and artificial corundum, wherein the particle size of the artificial corundum is 24-320 mesh, and the particle size of the artificial corundum is 24-280 mesh. During the grinding process, the diameter of the grinding wheel is 200-250 mm, and the rotation speed is 1500-2400 rpm. The degreasing step includes immersing the ground metal part in acetone for degreasing. The proportions of the components in the preparation process of coating A, by mass, include: 8-16 parts of epoxy resin, 2-4 parts of hexanediol diacrylate, 0.02-0.04 parts of photoinitiator 907, 3.2-6.4 parts of fluoroalkyl-modified mercapto POSS, 0.5-1 part of PDMS-modified glycidyl ether propyl POSS, 710-1420 parts of tetrahydrofuran, and 178-355 parts of ethanol; The concentration of coating B during the spin coating process is 4-5 wt %. During the UV curing process of coating B, the light source includes a 500 W mercury lamp, which irradiates the surface of coating A through a 300 nm filter.

2. The surface treatment process for wear-resistant and corrosion-resistant metal parts according to claim 1, characterized in that: The preparation process of the fluoroalkyl-modified mercapto POSS comprises the following steps: adding tridecafluorooctyl methacrylate and a photoinitiator 907 to tetrahydrofuran and stirring evenly to obtain a solution A; adding mercaptopropyl POSS to the tetrahydrofuran and stirring evenly to obtain a solution B; adding solution A to solution B under a nitrogen atmosphere, stirring and reacting for 6-7 hours under ultraviolet light, filtering, rotary evaporation, adding the product to anhydrous ethanol, centrifuging, washing, and vacuum drying to obtain the fluoroalkyl-modified mercaptopropyl POSS.

3. The surface treatment process for wear-resistant and corrosion-resistant metal parts according to claim 2, characterized in that: The proportions of various components in the preparation process of fluoroalkyl-modified mercaptopropyl POSS include, by mass fraction: 4.8-5.6 parts of tridecafluorooctyl methacrylate, 9070.05-0.06 parts of photoinitiator, and 2.69-2.88 parts of mercaptopropyl POSS.

4. The surface treatment process for wear-resistant and corrosion-resistant metal parts according to claim 1, characterized in that: The preparation method of the fluoroalkyl-modified glycidyl ether propyl POSS comprises the following steps: adding glycidyl ether propyl POSS, perfluorononanoic acid, and tetrabutylammonium bromide to 1,4-dioxane, heating and refluxing for a reaction of 8-9 hours, cooling to room temperature, rotary evaporation, adding the product to chloroform, stirring evenly, separating the organic layer, washing, drying, filtering, rotary evaporation, adding the crude product to acetonitrile, stirring evenly, filtering, and vacuum drying to obtain the fluoroalkyl-modified glycidyl ether propyl POSS.

5. The surface treatment process for wear-resistant and corrosion-resistant metal parts according to claim 4, characterized in that: The proportions of various components in the preparation process of fluoroalkyl-modified glycidyl ether propyl POSS, calculated by mass fraction, include: 1-2 parts of glycidyl ether propyl POSS, 0.15-0.2 parts of perfluorononanoic acid, and 0.015-0.016 parts of tetrabutylammonium bromide.

6. The surface treatment process for wear-resistant and corrosion-resistant metal parts according to claim 1, characterized in that: The proportions of the components in the preparation process of coating B include, by mass, 8-10 parts of glycidyl ether propyl POSS, 0.52-0.64 parts of fluoroalkyl-modified glycidyl ether propyl POSS, 0.28-0.35 parts of triarylsulfonium hexafluoroantimonate mixture, and 200-240 parts of butanone.

7. The surface treatment process for wear-resistant and corrosion-resistant metal parts according to claim 1, characterized in that: The specific operating steps of the coating A spraying process include a spray gun diameter of 1.0-1.1mm, a flow rate of 0.25-0.28mL / s, a compressed air pressure of 0.6-0.62MPa, a distance between the pre-treated metal part surface and the spray gun nozzle of 25-27cm, an "S"-shaped spraying during the spraying process, and a spray gun movement rate of 2.8-3cm / s; the light source during the UV curing process of the coating A includes a 1000W high-pressure mercury lamp, and the distance between the metal part surface and the light source is 28-30cm; the thickness of the coating A is 8-12μm.

8. A wear-resistant and corrosion-resistant metal part prepared by the surface treatment process for a wear-resistant and corrosion-resistant metal part according to any one of claims 1 to 7.

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