An alloy material for scale and wax prevention of circulating water system and a surface treatment method thereof

Abstract

This invention discloses an anti-scaling and anti-wax alloy material for circulating water systems and its surface treatment method, relating to the field of scale inhibition and prevention. The material includes an alloy matrix, the chemical composition of which, by mass percentage, is as follows: Cu 60-75%, Zn 15-28%, Al 3-8%, Ni 1.2-3.5%, Sn 0.5-2.0%, rare earth composite agent 0.1-0.8%, B 0.02-0.15%, with the balance being unavoidable metallurgical impurities. The metallographic structure of the alloy matrix is ​​ultrafine equiaxed crystals with an average grain size ≤5μm and a material density ≥99.5%. This invention utilizes a Cu-Zn-Al-Ni-Sn alloy system with a specific ratio of rare earth composite agent and trace amounts of boron, supplemented by ultrafine equiaxed crystal structure control, and then undergoes a composite surface treatment involving plasma nitriding, micro-arc oxidation, and vacuum impregnation with fluorosilane. The resulting anti-scaling and anti-wax alloy material for circulating water systems possesses both stable mechanical and electrical properties and excellent adaptability to the water environment.

Description

Technical Field

[0001] This invention relates to the field of scale inhibition and prevention technology, specifically to an anti-scale and anti-wax alloy material for circulating water systems and its surface treatment method. Background Technology

[0002] Circulating water systems are widely used in industrial production scenarios such as industrial cooling, oilfield gathering and transportation, and chemical media transportation. During operation, calcium and magnesium salts in the water are prone to crystallization to form hard scale, while waxy media are prone to molecular aggregation and deposition, which can easily cause pipeline blockage, reduced heat exchange efficiency, equipment corrosion and perforation, and other failures, seriously affecting the stable operation of the system. At present, chemical dosing and electromagnetic scale inhibition are commonly used treatment methods.

[0003] Chinese invention patent application number 202010359244.4 discloses an alloy material with anti-scaling properties and its preparation method. The application aims to solve the problem that "the main method of scale treatment for equipment pipelines is to add chemical agents and perform acid washing or alkaline washing, but this will cause huge economic costs and is also environmentally unfriendly, causing secondary pollution to the environment."

[0004] However, in circulating water systems, existing anti-scaling alloys generally suffer from defects such as coarse grains, rapid decay of electrochemical activity, insufficient surface erosion and corrosion resistance, and inability to balance stable electron release and long-term service. At the same time, it is difficult to simultaneously achieve scale inhibition and paraffin deposition prevention.

[0005] Therefore, we propose an anti-scaling and anti-wax alloy material for circulating water systems and its surface treatment method. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the prior art, the present invention provides an anti-scaling and anti-wax alloy material for circulating water systems and its surface treatment method, which can effectively solve the problems of the prior art.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions; This invention discloses an anti-scaling and anti-wax alloy material for circulating water systems, comprising an alloy matrix, the chemical composition of which, by mass percentage, is as follows: Cu 60~75%, Zn 15~28%, Al 3~8%, Ni 1.2~3.5%, Sn 0.5~2.0%, rare earth composite agent 0.1~0.8%, B 0.02~0.15%, with the balance being unavoidable metallurgical impurities; The metallographic structure of the alloy matrix is ​​ultrafine equiaxed crystals with an average grain size ≤5μm and a material density ≥99.5%.

[0008] Furthermore, the rare earth composite agent is composed of La and Ce mixed in a mass ratio of 1:1 to 2:1; the total mass fraction of the metallurgical impurities is ≤0.05%, of which Pb ≤0.01% and Fe ≤0.02%.

[0009] Furthermore, the alloy material has a Vickers hardness of 120~160HV, a conductivity of ≥25%IACS, and an electron release stability of ≥98% in a water environment at 30~80℃.

[0010] Furthermore, the alloy material has a surface roughness Ra≤0.8μm, is suitable for water environments with a pH value of 6~9, and does not release any chemical substances.

[0011] Furthermore, the alloy material is any one of rods, tubes, mesh packing, or ring packing.

[0012] On the other hand, a surface treatment method for an anti-scaling and anti-wax alloy material for a circulating water system includes a substrate pretreatment of the alloy substrate, and further includes the following steps performed sequentially: The pretreated substrate is subjected to plasma nitriding modification under vacuum conditions to form a nitride diffusion layer on the substrate surface; the nitrided substrate is then subjected to micro-arc oxidation treatment using a silicate electrolyte to form a porous ceramic oxide layer; the oxidized substrate is then subjected to vacuum impregnation and sealing treatment using a fluorosilane modification solution, and finally dried to obtain the finished product.

[0013] Furthermore, the process parameters for the plasma nitriding modification treatment are: vacuum degree 10~50Pa, treatment temperature 350~450℃, treatment time 2~4h, and the thickness of the nitride diffusion layer is 5~15μm.

[0014] Furthermore, the process parameters for the micro-arc oxidation treatment are: pulse voltage 350~500V, pulse frequency 500~1000Hz, treatment time 15~30min, and the thickness of the porous ceramic oxide layer is 10~30μm.

[0015] Furthermore, the fluorosilane modification solution is a 3-6% (w / w) tridecafluorooctyltriethoxysilane ethanol solution; the vacuum impregnation pressure is -0.08 to -0.05 MPa, the impregnation time is 15-30 min, and the drying temperature is 80-120℃.

[0016] Furthermore, the static water contact angle of the composite modified layer on the finished product surface is ≥110°, the resistance time to neutral salt spray corrosion is ≥1000h, and the electron transmittance of the composite modified layer is ≥95%.

[0017] Compared with the known prior art, the technical solution provided by this invention has the following beneficial effects: This invention utilizes a Cu-Zn-Al-Ni-Sn alloy system with a specific ratio of rare earth composite agents and trace amounts of boron, supplemented by ultrafine equiaxed crystal structure control, followed by a composite surface treatment involving plasma nitriding, micro-arc oxidation, and vacuum impregnation with fluorosilane. The resulting anti-scaling and anti-wax alloy material for circulating water systems possesses stable mechanical and electrical properties, excellent water environment adaptability, and a fine, dense alloy matrix. It exhibits stable electron release in water environments ranging from 30 to 80°C, is compatible with pH 6 to 9 water environments, and does not release chemical substances. It also features low surface roughness. The finished composite modified layer exhibits excellent hydrophobicity and salt spray corrosion resistance, high electron transmittance, and sustained, stable anti-scaling and anti-wax properties. The material can be processed into various forms such as rods, pipes, mesh, or ring packings, adaptable to different circulating water systems. It has a low content of harmful impurities in the matrix, ensuring safe and environmentally friendly use, strong long-term service stability, and effectively reduces scaling and wax buildup in circulating water systems, thereby lowering equipment maintenance costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram of a surface treatment method for anti-scaling and anti-wax alloy materials used in circulating water systems. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] The present invention will be further described below with reference to embodiments.

[0022] Example 1: This embodiment discloses an anti-scaling and anti-wax alloy material for a circulating water system and its surface treatment method, comprising an alloy matrix. The chemical composition of the alloy matrix, by mass percentage, is as follows: Cu 60%, Zn 15%, Al 3%, Ni 1.2%, Sn 0.5%, rare earth composite agent 0.1%, B 0.02%, with the balance being unavoidable metallurgical impurities. The metallographic structure of the alloy matrix is ​​ultrafine equiaxed crystals with an average grain size ≤5μm and a material density ≥99.5%; The rare earth composite agent is composed of La and Ce mixed in a mass ratio of 1:1; the total mass fraction of metallurgical impurities is ≤0.05%, of which Pb≤0.01% and Fe≤0.02%; The alloy material has a Vickers hardness of 120 HV, a conductivity ≥25% IACS, and an electron release stability ≥98% in a 30℃ water environment. The alloy material has a surface roughness Ra≤0.8μm, is suitable for water environments with a pH value of 6, and does not release any chemical substances; The alloy material can be any one of bars, tubes, mesh packing, or ring packing; A surface treatment method for anti-scaling and anti-wax alloy materials used in circulating water systems, such as Figure 1 As shown, the process includes matrix pretreatment of the alloy substrate, and also includes the following steps performed sequentially: The pretreated substrate is subjected to plasma nitriding modification under vacuum conditions to form a nitride diffusion layer on the substrate surface; the nitrided substrate is then subjected to micro-arc oxidation treatment using a silicate electrolyte to form a porous ceramic oxide layer; the oxidized substrate is then subjected to vacuum impregnation and sealing treatment using a fluorosilane modification solution, and finally dried to obtain the finished product. The process parameters for plasma nitriding modification are: vacuum degree 10 Pa, treatment temperature 350℃, treatment time 2 h, and nitride diffusion layer thickness 5 μm. The process parameters for micro-arc oxidation are: pulse voltage 350V, pulse frequency 500Hz, processing time 15min, and the thickness of the porous ceramic oxide layer is 10μm. The fluorosilane modification solution was a 3% (w / w) tridecafluorooctyltriethoxysilane ethanol solution; the vacuum impregnation pressure was -0.08 MPa, the impregnation time was 15 min, and the drying temperature was 80℃. The static water contact angle of the composite modified layer on the finished surface is ≥110°, the resistance time to neutral salt spray corrosion is ≥1000h, and the electron transmittance of the composite modified layer is ≥95%.

[0023] Example 2: An anti-scaling and anti-wax alloy material for circulating water systems and its surface treatment method, comprising an alloy matrix, the chemical composition of which, by mass percentage, is as follows: Cu 75%, Zn 28%, Al 8%, Ni 3.5%, Sn 2.0%, rare earth composite agent 0.8%, B 0.15%, with the balance being unavoidable metallurgical impurities; The metallographic structure of the alloy matrix is ​​ultrafine equiaxed crystals with an average grain size ≤5μm and a material density ≥99.5%; The rare earth composite agent is composed of La and Ce mixed in a mass ratio of 2:1; the total mass fraction of metallurgical impurities is ≤0.05%, of which Pb≤0.01% and Fe≤0.02%; The alloy material has a Vickers hardness of 160 HV, a conductivity ≥25% IACS, and an electron release stability ≥98% in an 80℃ water environment. The alloy material has a surface roughness Ra≤0.8μm, is suitable for water environments with a pH value of 9, and does not release any chemical substances; The alloy material can be any one of bars, tubes, mesh packing, or ring packing; A surface treatment method for anti-scaling and anti-wax alloy materials used in circulating water systems, such as Figure 1 As shown, the process includes matrix pretreatment of the alloy substrate, and also includes the following steps performed sequentially: The pretreated substrate is subjected to plasma nitriding modification under vacuum conditions to form a nitride diffusion layer on the substrate surface; the nitrided substrate is then subjected to micro-arc oxidation treatment using a silicate electrolyte to form a porous ceramic oxide layer; the oxidized substrate is then subjected to vacuum impregnation and sealing treatment using a fluorosilane modification solution, and finally dried to obtain the finished product. The process parameters for plasma nitriding modification are: vacuum degree 50Pa, treatment temperature 450℃, treatment time 4h, and nitride diffusion layer thickness 15μm. The process parameters for micro-arc oxidation are: pulse voltage 500V, pulse frequency 1000Hz, processing time 30min, and the thickness of the porous ceramic oxide layer is 30μm. The fluorosilane modification solution was a 6% (w / w) tridecafluorooctyltriethoxysilane ethanol solution; the vacuum impregnation pressure was 0.05 MPa, the impregnation time was 30 min, and the drying temperature was 120℃. The static water contact angle of the composite modified layer on the finished surface is ≥110°, the resistance time to neutral salt spray corrosion is ≥1000h, and the electron transmittance of the composite modified layer is ≥95%.

[0024] Example 3 An anti-scaling and anti-wax alloy material for circulating water systems and its surface treatment method, comprising an alloy matrix, the chemical composition of which, by mass percentage, is as follows: Cu 68%, Zn 22%, Al 5%, Ni 2.3%, Sn 1.2%, rare earth composite agent 0.45%, B 0.08%, with the balance being unavoidable metallurgical impurities; The metallographic structure of the alloy matrix is ​​ultrafine equiaxed crystals with an average grain size ≤5μm and a material density of 99.7%. The rare earth composite agent is composed of La and Ce mixed in a mass ratio of 1.5:1; the total mass fraction of metallurgical impurities is ≤0.05%, of which Pb≤0.01% and Fe≤0.02%; The alloy material has a Vickers hardness of 140 HV, a conductivity ≥25% IACS, and an electron release stability ≥98% in a 60℃ water environment. The alloy material has a surface roughness Ra≤0.8μm, is suitable for a water environment with a pH of 7.5, and does not release any chemical substances. The alloy material is a mesh filler.

[0025] A surface treatment method for an anti-scaling and anti-wax alloy material for a circulating water system includes a substrate pretreatment of the alloy substrate, and further includes the following steps performed sequentially: The pretreated substrate is subjected to plasma nitriding modification under vacuum conditions to form a nitride diffusion layer on the substrate surface. A porous ceramic oxide layer is formed by micro-arc oxidation of the nitrided substrate using a silicate electrolyte system. The oxidized substrate is vacuum impregnated and sealed with a fluorosilane-modified solution, and then dried to obtain the finished product.

[0026] Plasma nitriding modification process parameters: vacuum degree 30Pa, treatment temperature 400℃, treatment time 3h, nitride diffusion layer thickness 10μm; Micro-arc oxidation process parameters: pulse voltage 420V, pulse frequency 750Hz, processing time 22min, and the thickness of the porous ceramic oxide layer is 20μm; Fluorosilane modification solution parameters: 4.5% (w / w) tridecafluorooctyltriethoxysilane ethanol solution; vacuum impregnation pressure -0.065 MPa, impregnation time 22 min, drying temperature 100℃; The static water contact angle of the composite modified layer on the finished surface is ≥110°, the resistance time to neutral salt spray corrosion is ≥1000h, and the electron transmittance of the composite modified layer is ≥95%.

[0027] Example 4 An anti-scaling and anti-wax alloy material for circulating water systems and its surface treatment method, comprising an alloy matrix, the chemical composition of which, by mass percentage, is as follows: Cu 72%, Zn 20%, Al 6%, Ni 2.8%, Sn 1.6%, rare earth composite agent 0.6%, B 0.11%, with the balance being unavoidable metallurgical impurities; The metallographic structure of the alloy matrix is ​​ultrafine equiaxed crystals with an average grain size ≤5μm and a material density of 99.8%. The rare earth composite agent is composed of La and Ce mixed in a mass ratio of 1.8:1; the total mass fraction of metallurgical impurities is ≤0.05%, of which Pb≤0.01% and Fe≤0.02%; The alloy material has a Vickers hardness of 150 HV, a conductivity ≥25% IACS, and an electron release stability ≥98% in a 70℃ water environment. The alloy material has a surface roughness Ra≤0.8μm, is suitable for water environments with a pH value of 8, and does not release any chemical substances; The alloy material is a ring-shaped filler.

[0028] A surface treatment method for an anti-scaling and anti-wax alloy material for a circulating water system includes a substrate pretreatment of the alloy substrate, and further includes the following steps performed sequentially: The pretreated substrate is subjected to plasma nitriding modification under vacuum conditions to form a nitride diffusion layer on the substrate surface. A porous ceramic oxide layer is formed by micro-arc oxidation of the nitrided substrate using a silicate electrolyte system. The oxidized substrate is vacuum impregnated and sealed with a fluorosilane-modified solution, and then dried to obtain the finished product.

[0029] Plasma nitriding modification process parameters: vacuum degree 40Pa, treatment temperature 420℃, treatment time 3.5h, nitride diffusion layer thickness 13μm; Micro-arc oxidation process parameters: pulse voltage 460V, pulse frequency 850Hz, processing time 26min, and the thickness of the porous ceramic oxide layer is 25μm; Fluorosilane modification solution parameters: 5% (w / w) tridecafluorooctyltriethoxysilane ethanol solution; vacuum impregnation pressure -0.06 MPa, impregnation time 25 min, drying temperature 110℃; The static water contact angle of the composite modified layer on the finished surface is ≥110°, the resistance time to neutral salt spray corrosion is ≥1000h, and the electron transmittance of the composite modified layer is ≥95%.

[0030] Comparative example: It uses ordinary copper-zinc alloy (without rare earth or boron doping, and a grain size of 20μm), with a single polishing treatment and no composite surface modification. Tests show that the electron release stability rate at 60℃ is 82%, the salt spray resistance is only 120h, and scale adhesion and surface oxidation occur after one month of use, resulting in a significant reduction in the anti-scaling effect.

[0031] See the further detailed description shown in the above embodiments: The alloy matrix is ​​prepared through a combined process of vacuum melting, hot extrusion, and multi-stage aging to achieve an ultrafine equiaxed grain structure and high density. The specific preparation steps are as follows: raw materials are prepared according to a predetermined chemical composition ratio; pure metal raw materials and rare earth boron master alloy are placed in a vacuum induction melting furnace, with the vacuum level controlled to ≤6×10⁻⁶. -3Pa, heated to 1090~1140℃ and held for 25~35 minutes for melting, with high-purity argon gas introduced throughout the process to prevent oxidation; after melting, cast into ingots, and after homogenization treatment at 430~470℃ for 1.5 hours, hot extrusion is carried out, with the extrusion ratio controlled at 12:1~15:1; the extruded billet is subjected to a two-stage aging treatment at 330~350℃ for 2 hours and 270~290℃ for 3 hours, followed by air cooling, to obtain a qualified alloy matrix with an average grain size ≤5μm and a density ≥99.5%; The substrate pretreatment is a standardized clean activation process, with specific steps and parameters as follows: First, the alloy substrate is placed in an alkaline degreasing solution and ultrasonically degreased at 55°C for 12 minutes to remove surface oil and processing stains; after degreasing, it is rinsed with deionized water and then immersed in a 6% (v / v) dilute nitric acid solution for activation at room temperature for 45 seconds to completely remove the original oxide film on the substrate surface; after activation, it is mechanically polished with 3000-mesh diamond polishing paste until the surface roughness Ra≤0.8μm; finally, it is ultrasonically cleaned with anhydrous ethanol for 8 minutes and quickly dried with cold air to complete the substrate pretreatment. The silicate system electrolyte used in the above embodiments is a specially formulated solution with deionized water as the base solvent. The mass concentrations of each component are as follows: sodium silicate 18~22 g / L, sodium hydroxide 2.5~3.5 g / L, glycerol 6~7 g / L, and complexing agent EDTA-2Na 0.8~1.0 g / L. After the electrolyte is prepared, the pH value is adjusted to 11.5~12.5. The micro-arc oxidation process uses circulating cooling water to control the temperature and maintain the electrolyte temperature ≤38℃. This electrolyte formulation can uniformly generate a ceramic oxide layer with controllable porosity, avoid oxide layer ablation and pinhole defects, and ensure that the material's electron transmittance and protective performance meet the standards. The anti-scaling and anti-wax properties of the alloy material were quantitatively verified using simulated industrial circulating water conditions. The test conditions closely resembled actual application scenarios: the circulating water temperature was controlled at 60℃, the water calcium hardness at 600mg / L, the medium pH at 7.0~8.0, the fluid flow rate at 1.0~1.5m / s, and the medium wax content at 0.4~0.6g / L, with continuous long-term testing for 720 hours. The anti-scaling rate was calculated using the difference in scale weight, and the anti-wax rate was calculated using the hexane extraction and weighing method. After verification under these conditions, the material's anti-scaling rate was no less than 96%, and its anti-wax rate was no less than 92%. Its core working logic is that the stable release of electrons from the matrix disrupts the nucleation conditions for scale crystals, while the hydrophobic modification layer on the surface reduces the adhesion of wax. These two actions simultaneously achieve anti-scaling and anti-wax properties, thus directly replicating the core application effect of this technical solution.

[0032] In summary, the alloy material and surface treatment method shown in this embodiment, through a specific ratio of Cu-Zn-Al-Ni-Sn alloy system compounded with rare earth composite agents and trace amounts of boron, supplemented by ultra-fine equiaxed crystal structure control, and then subjected to a composite surface treatment of plasma nitriding, micro-arc oxidation, and fluorosilane vacuum impregnation and sealing, produces a scale and wax prevention alloy material for circulating water systems. This material possesses stable mechanical and electrical properties as well as excellent water environment adaptability. The alloy matrix has fine grain size and high density, stable electron release in a water environment of 30~80℃, adaptable to a water environment of pH 6~9 without chemical precipitation, low surface roughness, and the finished composite modified layer exhibits excellent hydrophobicity and salt spray corrosion resistance, high electron transmittance, and can sustainably and stably perform scale and wax prevention functions. The material can be processed into various forms such as rods, pipes, mesh or ring packings, suitable for installation and use in different circulating water systems. The matrix has low content of harmful impurities, is safe and environmentally friendly to use, has strong long-term service stability, and can effectively reduce the scaling and waxing problems of circulating water systems, thereby reducing equipment operation and maintenance costs.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A scale and wax prevention alloy material for circulating water systems, comprising an alloy matrix, characterized in that, The chemical composition of the alloy matrix, by mass percentage, is as follows: Cu 60~75%, Zn 15~28%, Al 3~8%, Ni 1.2~3.5%, Sn 0.5~2.0%, rare earth composite agent 0.1~0.8%, B 0.02~0.15%, with the balance being unavoidable metallurgical impurities; The metallographic structure of the alloy matrix is ​​ultrafine equiaxed crystals with an average grain size ≤5μm and a material density ≥99.5%.

2. The anti-scaling and anti-wax alloy material for circulating water systems according to claim 1, characterized in that, The rare earth composite agent is composed of La and Ce mixed in a mass ratio of 1:1 to 2:1; the total mass fraction of the metallurgical impurities is ≤0.05%, of which Pb ≤0.01% and Fe ≤0.02%.

3. The anti-scaling and anti-wax alloy material for circulating water systems according to claim 1, characterized in that, The alloy material has a Vickers hardness of 120~160HV, a conductivity of ≥25%IACS, and an electron release stability of ≥98% in a water environment at 30~80℃.

4. The anti-scaling and anti-wax alloy material for circulating water systems according to claim 1, characterized in that, The alloy material has a surface roughness Ra≤0.8μm, is suitable for water environments with a pH value of 6~9, and does not release any chemical substances.

5. The anti-scaling and anti-wax alloy material for circulating water systems according to claim 1, characterized in that, The alloy material is any one of rods, tubes, mesh packing, or ring packing.

6. A surface treatment method for an anti-scaling and anti-wax alloy material for a circulating water system, the method being an implementation method of the anti-scaling and anti-wax alloy material for a circulating water system as described in any one of claims 1-5, comprising pre-treatment of the alloy substrate, characterized in that, It also includes the following steps, which are performed sequentially: The pretreated substrate is subjected to plasma nitriding modification under vacuum conditions to form a nitride diffusion layer on the substrate surface. A porous ceramic oxide layer is formed by micro-arc oxidation of the nitrided substrate using a silicate electrolyte system. The oxidized substrate is vacuum impregnated and sealed with a fluorosilane-modified solution, and then dried to obtain the finished product.

7. The surface treatment method for an anti-scaling and anti-wax alloy material for a circulating water system according to claim 6, characterized in that, The process parameters for the plasma nitriding modification treatment are: vacuum degree 10~50Pa, treatment temperature 350~450℃, treatment time 2~4h, and the thickness of the nitride diffusion layer is 5~15μm.

8. The surface treatment method for an anti-scaling and anti-wax alloy material for a circulating water system according to claim 6, characterized in that, The process parameters for the micro-arc oxidation treatment are: pulse voltage 350~500V, pulse frequency 500~1000Hz, treatment time 15~30min, and the thickness of the porous ceramic oxide layer is 10~30μm.

9. A surface treatment method for an anti-scaling and anti-wax alloy material for a circulating water system according to claim 6, characterized in that, The fluorosilane modification solution is a 3-6% (w / w) tridecafluorooctyltriethoxysilane ethanol solution; the vacuum impregnation pressure is -0.08 to -0.05 MPa, the impregnation time is 15-30 min, and the drying temperature is 80-120℃.

10. A surface treatment method for an anti-scaling and anti-wax alloy material for a circulating water system according to claim 6, characterized in that, The static water contact angle of the composite modified layer on the finished surface is ≥110°, the resistance time to neutral salt spray corrosion is ≥1000h, and the electron transmittance of the composite modified layer is ≥95%.

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