Method for processing metal surface microtextures using mask plate biojet

Abstract

The present invention belongs to the technical field of functional surface processing, and specifically discloses a method for processing a metal surface microtexture based on a mask blank biojet, including: (1) microbial culture: increasing the number of microbial communities and microbial activity so that the concentration of highly oxidizing ions in the culture solution reaches a desired setting; (2) mask plate production: designing and producing a mask plate according to the requirements of the microtexture; (3) pre-treating the surface of the workpiece; (4) processing the microtexture; and (5) re-oxidizing the culture solution. The present invention can selectively remove the surface material of the workpiece by combining the mask plate technology and the high-precision servo control system, realize the processing of the texture pattern of the irregular workpiece, and has high applicability.

Description

[Technical Field]

[0001] The present invention belongs to the technical field of functional surface processing, and more specifically, relates to a method for processing metal surface microtextures based on mask plate biojet. [Background technology]

[0002] Surface texture refers to the process of applying a regularly arranged pattern with geometric shapes and dimensions to the surface of a material. Surface texture can effectively improve the wear resistance, optical properties, biocompatibility, adhesion release properties, lubrication properties, and heat dissipation properties of materials. Surfaces with microtextures have a wide range of applications in base components, implants, medical devices, optical components, and heat exchange devices, and have significant potential applications in national strategic industries such as aerospace, energy and transportation, and medical rehabilitation.

[0003] Surface texture processing technologies can be broadly divided into additive molding, subtractive molding, and forced molding. Additive molding of textures primarily involves regularly adding material to the material surface using methods such as coating, sputtering, spraying, deposition, and casting, thereby improving the surface properties by processing micro-protrusions on the material surface. Subtractive molding of textures primarily involves slightly removing material from the material surface using methods such as mechanical cutting, high-energy beam machining, chemical etching, electrical discharge machining, and electrochemical machining, thereby improving surface performance by processing micro-grooves, dimples, bio-patterns, etc. on the material surface. Forced molding of textures utilizes the plastic deformation of the material under external constraints to create large-area micro-textures. Conventional surface texture processing technologies have problems such as high equipment costs, high processing costs, difficulty in controlling the morphology of micro- and nano-patterns, and complex processes when processing patterns ranging from a few microns to tens of microns. Therefore, the development of new processing methods to solve these problems is quite necessary. [Overview of the project] [Problems that the invention aims to solve]

[0004] The objective of the present invention is to overcome the shortcomings of the prior art and to provide a method for processing metal surface microtextures based on mask plate biojet. [Means for solving the problem]

[0005] To achieve the above objective, one technical embodiment of the present invention is a method for processing metal surface microtextures based on mask plate biojet, specifically, (1) Microbial culture: A step of increasing the number and activity of the microbial community by expanding the culture to provide a culture environment for the growth and proliferation of microorganisms, and increasing the concentration of oxidizing ions in the culture medium, (2) Mask plate fabrication: the target of processing Microtexture The steps include designing a mask pattern according to the shape and arrangement and manufacturing a mask plate, (3) Pretreatment: A step of pretreatment of the workpiece surface, (4) Microtexture processing: The object to be processed The aforementioned microtexture Depending on the specific form, the spatial position between the culture medium nozzle, mask plate, and workpiece is adjusted, and process parameters such as spray speed and spray angle, which are key points for processing irregularly shaped curved surfaces and irregularly shaped microtextures, are adjusted, and a culture medium with a high concentration of oxidizing ions is sprayed through the mask plate onto the workpiece surface, reacts sufficiently, and the exposed surface of the workpiece is eroded and removed by the oxidizing ions, thereby forming a microtexture surface. (5) Re-oxidation of the culture medium: After erosion, the culture medium is converted into a low-oxidation solution, the low-oxidation solution is transported to a microbial culture vessel, and the microorganisms re-oxidize it into a high-oxidation solution.

[0006] In microbial culture, the culture environment is constructed according to environmental factors affecting microbial growth or metabolism, such as oxygen, pH, nutrients, and temperature. The raw materials are then converted, and the number of microbial communities is increased through expanded culture, thereby enhancing microbial activity and the concentration of high-oxidizing ions in the solution.

[0007] Furthermore, the microorganisms used in step (1) have an erosive effect on metals, and the microorganisms directly produce ions or are involved in ion conversion, and include, but are not limited to, Thiobacillus ferrooxydans and Thiobacillus thiooxydans.

[0008] Furthermore, during the culture process in step (1), the microorganisms are made highly active by monitoring relevant parameters that characterize the microbial conversion efficiency, such as the number of microorganisms and the concentration of the product. If the microbial activity is low, a means of gradually increasing the microbial activity according to different culture medium volume levels can be employed.

[0009] In the microtexture processing process, material removal is achieved by sufficient contact and reaction between an oxidizing solution and the metal. The low-oxidizing solution generated by material removal needs to be oxidized to a high-oxidizing solution by microbial activity; therefore, experiments must ensure that the microorganisms have high activity. Typically, bacterial species are stored at low temperatures in a refrigerator, and bacterial species have low activity under low-temperature conditions, requiring stepwise cultivation to increase microbial activity. Microbial activity is determined by the conversion efficiency per unit time, and in this method, microbial activity is characterized by measuring the amount of product and reactant per unit volume after microbial activity using a color reaction.

[0010] Furthermore, the culture medium in step (1) is rich in highly oxidizing ions, and the culture medium involved in microtexture processing may be a highly oxidizing solution containing microorganisms, or a highly oxidizing solution that does not contain microorganisms.

[0011] The mask plate has a permeable textured pattern, and a highly oxidizing solution with a certain kinetic energy passes through the mask blank, making sufficient contact with the material on the workpiece surface and reacting with it.

[0012] Furthermore, the shape of the microtexture pattern in step (2) is circular, square, rectangular, or any other desired shape.

[0013] Furthermore, the dimensions of the microtexture pattern in step (2) are designed on a millimeter scale, a micrometer scale, or a nanometer scale according to requirements.

[0014] Furthermore, the mask plates used in steps (2) and (4) are made of materials that are not attacked by highly oxidizing solutions, and plastics, rubbers, ceramics, corrosion-resistant metals, etc. are preferred.

[0015] Furthermore, the mask plate in step (2) can obtain a desired shape by various suitable processing methods currently, including but not limited to lasers, etching, high-energy beams, water jets, machining, etc.

[0016] Furthermore, the main components of the workpiece in steps (3) and (4) are erodible by highly oxidizing solutions, including but not limited to pure metal materials, metal alloy materials, metal sintered materials, etc. with lower oxidizability than trivalent iron ions such as iron, cobalt, copper, tin, etc.

[0017] Furthermore, the pretreatment of the surface of the workpiece in step (3) includes, but is not limited to, rust removal, degreasing, polishing, various cleaning, etc. for the purpose of removing surface residues and obtaining a clean and dry surface.

[0018] According to the processing requirements and the constraints of the processing environment, by appropriately adjusting the relative positions of the nozzle, the mask plate, and the workpiece and the process parameters, it is ensured that the flow field of the highly oxidizing solution passing through the mask plate is below the processing dimensions of the workpiece surface microtexture, and material removal in the exposed area is realized.

[0019] Furthermore, in step (4), after the culture medium is brought into contact with the material surface through the mask plate, a substitution reaction occurs between the highly oxidizing ions in the culture medium and the elemental metal or metal oxide on the workpiece surface. The elemental metal or oxide on the surface is oxidized to metal ions, dissolves in the solution, and the metal material is removed. In addition, the highly oxidizing culture medium involved in the material removal is converted into a low-oxidizing culture medium.

[0020] Furthermore, the cross-section of the nozzle outlet in step (4) is one of a circle, a square, or a rectangle, or any other specific shape designed according to the requirements of the microtexture of the workpiece surface.

[0021] Furthermore, in step (4), by adjusting the nozzle exit speed, the impact speed at which the highly oxidizing solution passes through the mask blank and reaches the workpiece is controlled, thereby enabling adjustment of the processing efficiency and accuracy of the microtexture on the workpiece surface.

[0022] Furthermore, in step (4), by adjusting the spray angle, the impact pressure of the highly oxidizing solution upon impact with the workpiece surface can be adjusted, and different micro- and nanoscale textured surfaces can be obtained due to the pressure difference of the solution.

[0023] Furthermore, in step (4), by controlling the relative position between the nozzle and the workpiece, microtexture processing is achieved on all or part of the workpiece. The low-oxidation solution is transported through a pipeline to a microbial culture vessel, where the oxidation process from the low-oxidation solution to the high-oxidation solution is accelerated using microbial properties. After the solution recovers to a high-oxidation state, it continues to participate in microtexture processing, realizing a continuous cycle of the entire processing process. [Effects of the Invention]

[0024] The advantages of the present invention compared to prior art are as follows: 1. This invention utilizes the metabolic characteristics of microorganisms to ensure high oxygenation of the culture medium and introduces jet technology to improve the efficiency of removing surface materials from the workpiece. This method is environmentally friendly and has low power consumption. 2. The present invention employs a low-energy removal method in the process of processing a microtexture onto a material surface, thereby reducing damage to the textured surface, improving the mechanical performance of the surface texture, and providing significant benefits in improving part performance and extending service life. 3. The present invention combines mask plate technology and a high-precision servo control system to selectively remove surface material from a workpiece, thereby enabling the processing of micro- and nano-structures in irregularly shaped workpieces, and thus possesses high applicability. [Brief explanation of the drawing]

[0025] [Figure 1] This is a schematic diagram of metal surface microtexturing based on mask plate biojet in Example 1. [Figure 2] This is a schematic diagram illustrating how the orientation and position of the workpiece are adjusted in Example 1 to achieve microtexture processing on the entire surface of the workpiece. [Modes for carrying out the invention]

[0026] To further clarify the object, technical modes, and advantages of the present invention, the present invention will be described in more detail below with reference to the accompanying drawings and specific examples, but the scope of protection of the present invention is not limited to these examples. Similar reference numerals in this specification represent similar elements throughout, and similar reference numerals represent similar elements.

[0027] In the description of the present invention, positions or positional relationships indicated by terms such as "top," "bottom," "front," "back," "left," "right," "side," "vertical," "top," "bottom," "inside," and "outside" should be understood to be based on the positions or positional relationships shown in the perspective views of the drawings. This is merely to facilitate and simplify the description of the present invention and does not express or imply that the devices or elements mentioned must have a specific position, be configured in a specific position, or operate in a specific position, and therefore should not be understood as limiting the present invention.

[0028] <Example 1> The method for processing metal surface microtextures using mask plate biojet includes the following steps:

[0029] 1. Microbial culture The microorganism used in the example is Thiobacillus ferrooxydans. Since the strain is low in activity when stored at low temperatures, direct use in texture processing will reduce processing efficiency. To ensure high activity when the microorganisms participate in the reaction, the microbial activity is gradually increased at different culture volume levels (100 ml, 500 ml, 2000 ml, and 10000 ml, respectively). The culture medium contains 3 g / L ammonium sulfate, 0.5 g / L magnesium sulfate heptahydrate, 0.1 g / L dipotassium hydrogen phosphate, 0.01 g / L potassium nitrate tetrahydrate, and 24.83 g / L ferrous sulfate heptahydrate. The pH of the medium is adjusted to 1.8 with dilute sulfuric acid. Thiobacillus ferrooxydans strains are inoculated into the culture medium, oxygen gas is injected, and the culture is incubated at 30°C for 20 hours with a shaking speed of 180 rpm. The microbial action is utilized to utilize Fe 2+ Fe 3+ Convert to Fe in the culture medium 2+ and Fe 3+ The relative content of the Fe was measured to determine microbial activity, and the oxidation of the Fe was completed. 3+ Rich solutions, as highly oxidizing solutions, are involved in the processing of surface microtextures. Due to microbial activity, Fe in the solution 2+ The content is almost 0, and most of the iron ions are Fe 3+exists in the form of Fe 2+ and Fe 3+ Based on the color development characteristics in different solutions of Fe and Fe, it is judged whether it has been completely converted by titration method.

[0030] 2. Mask treatment As shown in FIGS. 1-2, the fine pattern of the mask 6 is an empirically designed matrix hole. Circular holes with a diameter of 50 μm are processed in a 9×9 matrix on a 301 stainless steel thin plate using a micro-nano laser cutting technology, and are adhered to the copper sample 8 by mechanical chuck means.

[0031] 3. Pretreatment of the workpiece Taking copper as the workpiece, a sample with a diameter φ = 15 mm and a thickness h = 3 mm is taken from a copper plate, inserted into resin, and the sample is lapped, polished, etc. using a polishing machine. After passing through the cleaning and drying processes, a flat and clean copper block sample 8 is obtained.

[0032] 4. Microtexture processing As shown in FIGS. 1-2, in this embodiment, the pressure of the culture solution is increased using the pressurizing device 3 as the jet power source, and the highly oxidizing culture solution in the culture tank 2 is transported to the nozzle 5 through the jet pipeline 4. The highly oxidizing culture solution ejected from the outlet of the nozzle 5 passes through the mask plate 6 and reacts with the exposed surface of the copper sample 8. By adjusting the posture of the chuck stage 11, microtexture processing of the entire surface of the workpiece can be realized, and the removal of the surface material of the copper block can be realized. The culture solution involved in the reaction is converted into a low-oxidizing solution and returns to the liquid storage tank 7. In this microtexture processing by biojet, the cross-section of the nozzle outlet is a circle with a diameter of 12 mm, the distance d between the nozzle outlet and the mask plate is 5 mm, the flow rate is 0.14 L / s, the axis of the nozzle is perpendicular to the plane of the mask plate, that is, α = 90° and θ = 90°. After etching for 5 minutes, microtexture is processed on the surface of the copper sample 8.

[0033] 5. Re-oxidation of the culture solution by microbial metabolic characteristics As shown in Figure 1, the low-oxidizing solution in the storage tank 7 returns to the microbial reaction vessel 1 via the reflux line 9 and pump 10, where it is re-oxidized to a high-oxidizing solution by the microbial properties and stored in the culture tank 2, thereby realizing the recycling of the culture medium.

[0034] <Example 2> 1. Microbial culture The microorganism used in the example is Thiobacillus ferrooxydans. Since the strain is low in activity when stored at low temperatures, direct use in texture processing will reduce processing efficiency. To ensure high activity when the microorganisms participate in the reaction, the microbial activity is gradually increased at different culture volume levels (100 ml, 500 ml, 2000 ml, and 10000 ml, respectively). The culture medium contains 3 g / L ammonium sulfate, 0.5 g / L magnesium sulfate heptahydrate, 0.1 g / L dipotassium hydrogen phosphate, 0.01 g / L potassium nitrate tetrahydrate, and 24.83 g / L ferrous sulfate heptahydrate. The pH of the medium is adjusted to 1.8 with dilute sulfuric acid. Thiobacillus ferrooxydans strains are inoculated into the culture medium, oxygen gas is injected, and the culture is incubated at 30°C for 20 hours with a shaking speed of 180 rpm. The microbial action is utilized to utilize Fe 2+ Fe 3+ Convert to Fe in the culture medium 2+ and Fe 3+ The relative content of the Fe was measured to determine microbial activity, and the oxidation of the Fe was completed. 3+ Rich solutions, as highly oxidizing solutions, are involved in the processing of surface microtextures. Due to microbial activity, Fe in the solution 2+ The content is almost 0, and most of the iron ions are Fe 3+ It exists in the form of Fe. 2+ and Fe 3+ Based on the color development characteristics in different solutions, it is determined by titration whether or not the conversion was complete.

[0035] 2. Masking As shown in Figure 1-2, the fine pattern of the mask 6 consists of empirically designed matrix holes, created by machining 50 μm diameter circular holes in a 9x9 matrix on a 301 stainless steel sheet using micro-nanometer laser cutting technology, and then pressing it into close contact with the copper sample 8 using a mechanical chuck.

[0036] 3. Pre-treatment of workpieces Using copper as the workpiece, a sample with a diameter of φ=15 mm and a thickness of h=3 mm is taken from a copper plate and inserted into resin. The sample is then lapped and polished using a polishing machine, and after washing and drying processes, a flat and clean copper block sample 8 is obtained.

[0037] 4. Processing microtextures As shown in Figures 1-2, in this embodiment, the pressurizing device 3 is used as the jetting power source to increase the pressure of the culture medium, and the highly oxidizing culture medium in the culture tank 2 is transported to the nozzle 5 via the jet line 4. The highly oxidizing culture medium ejected from the outlet of the nozzle 5 passes through the mask plate 6 and reacts with the exposed surface of the copper sample 8. By adjusting the posture of the chuck stage 11, microtexture processing is achieved on the entire surface of the workpiece, and the surface material of the copper block can be removed. The culture medium that participated in the reaction is converted into a low-oxidizing solution and returned to the storage tank 7. In this bio-jet microtexture processing, the cross-section of the nozzle outlet is a circle with a diameter of 12 mm, the distance d between the nozzle outlet and the mask plate is 5 mm, the flow rate is 0.17 L / s, the axis of the nozzle is perpendicular to the plane of the mask plate, i.e., α = 90°, θ = 90°, and after etching for 5 minutes, a microtexture is processed on the surface of the copper sample 8.

[0038] 5. Reoxidation of culture medium due to microbial metabolic characteristics As shown in Figure 1, the low-oxidizing solution in the storage tank 7 returns to the microbial reaction vessel 1 via the reflux line 9 and pump 10, where it is re-oxidized to a high-oxidizing solution by the microbial properties and stored in the culture tank 2, thereby realizing the recycling of the culture medium.

[0039] <Example 3> 1. Microbial culture The microorganism used in the example is Thiobacillus ferrooxydans. Since the strain is low in activity when stored at low temperatures, direct use in texture processing will reduce processing efficiency. To ensure high activity when the microorganisms participate in the reaction, the microbial activity is gradually increased at different culture volume levels (100 ml, 500 ml, 2000 ml, and 10000 ml, respectively). The culture medium contains 3 g / L ammonium sulfate, 0.5 g / L magnesium sulfate heptahydrate, 0.1 g / L dipotassium hydrogen phosphate, 0.01 g / L potassium nitrate tetrahydrate, and 24.83 g / L ferrous sulfate heptahydrate. The pH of the medium is adjusted to 1.8 with dilute sulfuric acid. Thiobacillus ferrooxydans strains are inoculated into the culture medium, oxygen gas is injected, and the culture is incubated at 30°C for 20 hours with a shaking speed of 180 rpm. The microbial action is utilized to utilize Fe 2+ Fe 3+ Convert to Fe in the culture medium 2+ and Fe 3+ The relative content of the Fe was measured to determine microbial activity, and the oxidation of the Fe was completed. 3+ Rich solutions, as highly oxidizing solutions, are involved in the processing of surface microtextures. Due to microbial activity, Fe in the solution 2+ The content is almost 0, and most of the iron ions are Fe 3+ It exists in the form of Fe. 2+ and Fe 3+ Based on the color development characteristics in different solutions, it is determined by titration whether or not the conversion was complete.

[0040] 2. Masking As shown in Figure 1-2, the fine pattern of the mask 6 is an empirically designed matrix hole, in which circular holes with a diameter of 100 μm are processed in a 9x9 matrix in a 301 stainless steel sheet using micro-nanometer laser cutting technology, and then pressed into contact with the copper sample 8 by a mechanical chuck.

[0041] 3. Pre-treatment of workpieces Using copper as the workpiece, a sample with a diameter of φ=15 mm and a thickness of h=3 mm is taken from a copper plate and inserted into resin. The sample is then lapped and polished using a polishing machine, and after washing and drying processes, a flat and clean copper block sample 8 is obtained.

[0042] 4. Processing microtextures As shown in Figures 1-2, in this embodiment, the pressurizing device 3 is used as the jetting power source to increase the pressure of the culture medium, and the highly oxidizing culture medium in the culture tank 2 is transported to the nozzle 5 via the jet line 4. The highly oxidizing culture medium ejected from the outlet of the nozzle 5 passes through the mask plate 6 and reacts with the exposed surface of the copper sample 8. By adjusting the posture of the chuck stage 11, microtexture processing is achieved on the entire surface of the workpiece, and the surface material of the copper block can be removed. The culture medium that participated in the reaction is converted into a low-oxidizing solution and returned to the storage tank 7. In this bio-jet microtexture processing, the cross-section of the nozzle outlet is a circle with a diameter of 12 mm, the distance d between the nozzle outlet and the mask plate is 5 mm, the flow rate is 0.14 L / s, the axis of the nozzle is perpendicular to the plane of the mask plate, i.e., α = 90°, θ = 90°, and after etching for 5 minutes, a microtexture is processed on the surface of the copper sample 8.

[0043] 5. Reoxidation of culture medium due to microbial metabolic characteristics As shown in Figure 1, the low-oxidizing solution in the storage tank 7 returns to the microbial reaction vessel 1 via the reflux line 9 and pump 10, where it is re-oxidized to a high-oxidizing solution by the microbial properties and stored in the culture tank 2, thereby realizing the recycling of the culture medium.

[0044] The above description is merely a preferred embodiment of the present invention and does not limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, it is clear to those skilled in the art that the technical forms described in each of the above embodiments can be modified or some of the technical features can be replaced with equivalents, and that any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention will be covered within the scope of protection of the present invention. [Industrial applicability]

[0045] The present invention belongs to the technical field of mechanical surface processing and specifically discloses a method for processing metal surface microtextures based on mask plate biojet, comprising: (1) microbial culture: increasing the number and activity of microbial communities so that the high concentration of oxidizing ions in the culture medium reaches a desired level; (2) mask plate fabrication: designing and manufacturing a mask plate according to the microtexture requirements; (3) pre-treating the workpiece surface; (4) processing the microtexture; and (5) re-oxidizing the culture medium. The present invention combines mask plate technology and a high-precision servo control system to selectively remove surface material from a workpiece and realize the processing of texture patterns on irregularly shaped workpieces, and is highly applicable and has industrial applicability. [Explanation of symbols]

[0046] 1. Microbial reaction vessel 2 culture tanks 3. Pressurizing device 4 Jet pipeline 5 nozzles 6 Mask Plates 7. Liquid storage tank 8 Copper Samples 9. Return pipeline 10 pumps 11 Chuck Stage

Claims

1. (1) Microbial culture: The culture medium contains oxide ions and / or oxidized ions to provide a culture environment for the growth and proliferation of microorganisms, and the number of microbial communities and the activity of the microorganisms are increased by expanding the culture, and the concentration of oxide ions in the culture medium is increased. (2) Mask plate fabrication: A step of designing a mask pattern according to the shape and arrangement of the microtexture to be processed, and fabricating a mask plate, (3) Pretreatment: In order to remove surface residue and obtain a clean surface, the workpiece surface is subjected to at least one pretreatment selected from the group consisting of rust removal, degreasing, polishing, and washing. (4) Microtexture processing: Depending on the specific form of the microtexture to be processed, the spatial position between the culture medium nozzle, the mask plate, and the workpiece is adjusted, and the spray speed and spray angle are adjusted so that the culture medium is sprayed onto the workpiece surface via the mask plate, thereby eroding and removing the surface of the workpiece to form a microtexture surface. (5) Re-oxidation of culture medium by microorganisms: A method for processing metal surface microtextures based on mask plate biojet, characterized by comprising the step of transporting the culture medium after erosion in step (4) to the microbial culture in step (1) and re-oxidizing it to a highly oxidizing solution by microorganisms.

2. The method for processing a metal surface microtexture according to claim 1, characterized in that the microorganism used in step (1) has an erosive effect on the metal, directly produces ions, or is involved in ion conversion, and the microorganism includes at least one of Thiobacillus ferrooxydans and Thiobacillus thiooxydans.

3. The method for processing a metal surface microtexture according to claim 1, characterized in that, in step (1) above, the number of microorganisms or the concentration of the product is monitored to increase the activity of microorganisms involved in texture processing.

4. The oxidizing ion in step (1) is Fe ３＋ The oxidizable ion is Fe ２＋ The method for processing a metal surface microtexture according to claim 1, characterized in that it is the same.

5. The method for processing a metal surface microtexture according to claim 1, characterized in that the pattern shape of the microtexture in step (2) is selected from the group consisting of circles, squares, and rectangles, and the pattern dimensions of the microtexture are on a millimeter scale, a micrometer scale, or a nanoscale.

6. The method for processing a metal surface microtexture according to claim 1, characterized in that the mask plate in step (2) and step (4) is made of a material that is not affected by an oxidizing solution and has a penetrating mask pattern.

7. The method for processing a metal surface microtexture according to claim 1, characterized in that the method for processing the mask plate in step (2) includes at least one selected from the group consisting of laser, etching, high-energy beam, water jet, and machining.

8. The method for processing a metal surface microtexture according to claim 1, characterized in that the main component of the workpiece in step (3) and step (4) is corrosive to an oxidizing solution, and the workpiece comprises at least one selected from the group consisting of iron, cobalt, copper, and tin, as well as pure metal materials, metal alloy materials, and metal sintered materials that are less oxidizable than iron trivalent ions.

9. The method for processing a metal surface microtexture according to claim 1, characterized in that the cross-section of the nozzle outlet in step (4) is one selected from the group consisting of a circle, a square, and a rectangle.

10. The method for processing a metal surface microtexture according to claim 1, characterized in that, in step (4) above, the collision velocity of the oxidizing solution as it passes through the mask plate and reaches the workpiece is controlled by adjusting the nozzle outlet velocity, the pressure at which the oxidizing solution collides with the workpiece surface is adjusted by adjusting the spray angle, and the relative position between the nozzle and the workpiece is controlled to achieve microtexture processing on the entire surface or a part of the workpiece.

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