Anti-corrosion chromium alloy material and preparation method thereof
By adding composite deteriorating agents to chromium alloy materials and applying anti-corrosion coatings, the problem of corrosion of the material in long-term storage and humid environments is solved, and the hardness, impact toughness and corrosion resistance are improved, and the service life is extended.
Patent Information
- Application Number
- CN202411960878.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-05-13
AI Technical Summary
Ordinary chromium alloy materials are prone to corrosion in long-term storage and humid environments, and their hardness and impact toughness are not enough to meet the needs of many fields.
Improve corrosion resistance by adding composite deteriorating agents to the chromium alloy material to improve hardness and impact toughness, and applying anti-corrosion coatings to the surface.
It significantly improves the storage stability and service life of chromium alloy materials, effectively prevents corrosion in humid environments, and improves the overall performance of the material.
Smart Images
Figure CN119978940A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of anti-corrosion chromium alloy materials, and in particular to an anti-corrosion chromium alloy material and a preparation method thereof. Background Art
[0002] In industrial production, chromium alloy materials are widely used in aerospace, automobile manufacturing, petrochemical, medical equipment and other fields because of their excellent mechanical properties. In actual use, the hardness of chromium alloy materials is a measure of the material's ability to resist deformation due to local pressure, and the impact toughness reflects the ability of chromium alloy materials to absorb energy without brittle fracture when subjected to impact loads. With the development of industrialization, the hardness and impact toughness of ordinary chromium alloy materials have been unable to meet the use requirements of many fields.
[0003] At the same time, when chromium alloy materials are stored for a long time and used in a humid environment, their surfaces are susceptible to corrosion, which leads to the degradation of the performance of the chromium alloy materials and even causes great safety hazards in the operation of mechanical equipment. Generally speaking, the corrosion resistance of chromium alloy materials themselves is achieved by forming a dense oxide film on their surface, which effectively isolates external corrosive media and improves the corrosion resistance of chromium alloy materials. However, this naturally formed oxide film may be destroyed in adverse environments such as humidity, high temperature, and high concentration of chloride ions, thereby affecting the storage stability and safety of chromium alloy materials.
[0004] Based on this, the present invention provides a corrosion-resistant chromium alloy material and a preparation method thereof. The hardness and impact toughness of the chromium alloy material are enhanced by adding a composite modifier, and the corrosion resistance of the chromium alloy material is improved by coating an anti-corrosion coating on the surface of the chromium alloy, so that the chromium alloy material has excellent storage stability. Summary of the invention
[0005] The purpose of the present invention is to provide a corrosion-resistant chromium alloy material and a preparation method thereof, which solves the following technical problems: (1) the problem that the surface of ordinary chromium alloy materials is easily corroded during long-term storage and use in a humid environment; (2) the problem that the hardness and impact toughness of ordinary chromium alloy materials need to be improved.
[0006] The purpose of the present invention can be achieved through the following technical solutions: A corrosion-resistant chromium alloy material consists of a chromium alloy casting and a corrosion-resistant coating coated on the surface thereof; the chromium alloy casting comprises the following raw materials in parts by weight: 100-150 parts of chromium alloy raw materials and 0.3-2 parts of a composite modifier; the corrosion-resistant coating comprises the following raw materials in parts by weight: 55-85 parts of polyurethane acrylic resin, 8-12 parts of isobornyl methacrylate, 10-15 parts of fluorine-containing allyl polybutadiene, 3-5 parts of an initiator, and 100-120 parts of anhydrous ethanol; the composite modifier is prepared from a mixture containing K, Ca, Na, Mg, and Al elements; the fluorine-containing allyl polybutadiene is prepared by the reaction of pyrrolidone-based polybutadiene and 2-(trifluoromethyl)acrylic acid; and the pyrrolidone-based polybutadiene is prepared by the reaction of epoxy-terminated polybutadiene and 4-hydroxy-2-pyrrolidone.
[0007] Furthermore, the chemical composition of the chromium alloy raw material is 2-3% C, 20-30% Cr, 0.5-0.8% Si, 1.2-1.5% Mn, 0.8-1% Ni, 0.5-0.8% Mo, and the rest is Fe in percentage by mass; the initiator is any one of benzoyl peroxide and diisopropylbenzene peroxide.
[0008] Furthermore, the preparation method of the composite modifier comprises the following steps: Potassium carbonate, sodium chloride, silicon-magnesium-calcium alloy and aluminum alloy are mixed, ground and sieved to obtain a composite modifier.
[0009] Furthermore, the mass ratio of potassium carbonate, sodium chloride, silicon-magnesium-calcium alloy and aluminum alloy is 4:3:6:7.
[0010] Furthermore, the average particle size of the composite modifier is 3 mm.
[0011] In this scheme, a mixture containing active elements K, Na, Ca, Mg, and Al is ground and sieved to obtain a composite modifier. The active elements in the composite modifier can reduce the primary crystallization temperature of the alloy casting, and the eutectic crystallization temperature is reduced, so that the alloy liquid is supercooled in the liquidus and eutectic regions, which is conducive to the formation of carbides and the increase in the number of crystal nuclei. During crystallization, the active elements can be adsorbed on the grain boundaries to reduce the interfacial tension and form an adsorption film, which hinders the growth of Fe, Cr, C and other atoms in the alloy liquid into the carbide crystals, effectively reduces the preferential growth rate of carbides, and refines the primary carbides, thereby effectively improving the impact toughness and hardness of chromium alloy castings, and effectively improving the service life of chromium alloy castings.
[0012] Furthermore, the preparation method of the fluorine-containing allyl polybutadiene comprises the following steps: (1) placing the epoxy-terminated polybutadiene in toluene, stirring thoroughly, adding 4-hydroxy-2-pyrrolidone and a catalyst, heating to 85-90° C. to react for 3-5 hours, and collecting the product after reduced pressure distillation to obtain pyrrolidone-based polybutadiene; (2) Pyrrolidone-based polybutadiene is placed in N,N-dimethylformamide, and after thorough mixing, 2-(trifluoromethyl)acrylic acid and p-toluenesulfonic acid are added, the temperature is raised to react, and the product is collected after reduced pressure distillation to obtain fluorinated allyl polybutadiene.
[0013] In this scheme, under the action of a catalyst, the epoxy groups at both ends of the epoxy-terminated polybutadiene structure undergo a ring-opening reaction with the hydroxyl groups in the 4-hydroxy-2-pyrrolidone structure to obtain pyrrolidone-based polybutadiene, and then under the action of p-toluenesulfonic acid, the hydroxyl groups in the pyrrolidone-based polybutadiene structure undergo an esterification reaction with the carboxyl groups in the 2-(trifluoromethyl)acrylic acid structure to obtain fluorinated allyl polybutadiene. This fluorine-containing allyl polybutadiene structure has an organic fluorine structure, low surface energy, and strong chemical stability in corrosive media, which can effectively enhance the corrosion resistance of the anti-corrosion coating. At the same time, the double bonds at both ends of its structure can interact with the anti-corrosion coating matrix material, entangle the anti-corrosion coating matrix and the polybutadiene polymer chain segment, and effectively enhance the toughness of the anti-corrosion coating. At the same time, the pyrrolidone structure in its polymer chain segment can interact with the surface of the chromium alloy casting, enhance the adhesion of the anti-corrosion coating on the surface of the chromium alloy casting, effectively prevent the problem of coating shedding during long-term use, and significantly improve the protection timeliness of the anti-corrosion coating for chromium alloy castings.
[0014] Furthermore, the catalyst in step (1) is any one of tetrabutylammonium bromide, tetrabutylammonium chloride and tetrabutylammonium hydroxide.
[0015] Furthermore, in step (2), the temperature of the temperature-raising reaction is 95-110° C. and the time is 3.5-5 h.
[0016] A method for preparing an anti-corrosion chromium alloy material comprises the following steps: Step 1: place polyurethane acrylic resin, isobornyl methacrylate and fluorinated allyl polybutadiene in anhydrous ethanol, stir and mix thoroughly, add initiator, heat to 50-55° C. and stir for 5-6 hours, and cool to room temperature to obtain an anti-corrosion coating; Step 2: Place the chromium alloy raw material in a medium frequency induction furnace and heat it to 1450-1500°C. After the mixture is fully melted, add the composite modifier and wait for it to be completely mixed. Transfer the mixture to a mold for pouring. After pouring, cool it to room temperature and open the mold to obtain a casting. Step 3: In an argon atmosphere, the casting is kept at 1000-1200° C. for 3.5-5 hours, air-quenched to room temperature, and then kept at 500-600° C. for 5-6 hours, and cooled to room temperature to obtain a chromium alloy casting; Step 4: evenly apply the anti-corrosion coating on the surface of the chromium alloy casting, and cure it at 80-85° C. for 2-2.5 hours to obtain a corrosion-resistant chromium alloy material.
[0017] Beneficial effects of the present invention: The present invention prepares a composite modifier and participates in the preparation process of the chromium alloy casting, so that the prepared chromium alloy casting has excellent impact toughness and hardness. At the same time, the anti-corrosion coating is coated on the surface of the chromium alloy casting to form a corrosion-resistant chromium alloy material with excellent storage stability. It can exert an excellent anti-corrosion effect in a humid environment and a corrosive medium, and protect the chromium alloy casting, so that the prepared corrosion-resistant chromium alloy material has a long service life.
[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.
[0020] Figure 1 This is a flow chart for preparing the corrosion-resistant chromium alloy material of the present invention. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1
[0022] Preparation of composite modifier 30g of 20% potassium carbonate, 15% sodium chloride, 30% silicon-magnesium-calcium alloy with a calcium content of 50% and a magnesium content of 9%, and 35% aluminum alloy with an aluminum content of 95% are mixed, ground and sieved to obtain a composite modifier with an average particle size of 3mm. Example 2
[0023] Preparation of Fluorinated Allyl Polybutadiene (1) 3 g of epoxy-terminated polybutadiene was placed in 60 ml of toluene, and after thorough mixing and stirring, 2.6 g of 4-hydroxy-2-pyrrolidone and 0.5 g of tetrabutylammonium bromide were added, and the temperature was raised to 85°C for reaction for 3 h. The product was collected after reduced pressure distillation to obtain pyrrolidone-based polybutadiene; (2) Place 3.8 g of pyrrolidone-based polybutadiene in 80 ml of N,N-dimethylformamide and mix thoroughly. Then, add 3.5 g of 2-(trifluoromethyl)acrylic acid and 0.5 g of p-toluenesulfonic acid. Heat to 95 °C and react for 3.5 h. Collect the product after vacuum distillation to obtain fluorinated allyl polybutadiene.
[0024] The epoxy groups at both ends of the epoxy-terminated polybutadiene structure react with the hydroxyl groups of the 4-hydroxy-2-pyrrolidone structure to introduce the pyrrolidone group into the polymer segment of the polybutadiene, thereby effectively improving the adhesion between the anti-corrosion coating and the alloy substrate. At the same time, organic fluorine and active olefin groups are introduced into the polybutadiene polymer segment, and the active olefin groups and the active olefin groups in the anti-corrosion coating substrate material undergo free radical polymerization under the action of an initiator, and produce mutual entanglement to form a network structure, which not only further enhances the adhesion and toughness of the anti-corrosion coating and the surface of the alloy material, but also more effectively enhances the anti-corrosion ability of the surface of the alloy material, so that the finally prepared anti-corrosion chromium alloy material can meet the use requirements in various environments and has excellent storage stability and a long service life. Example 3
[0025] Preparation of anti-corrosion coatings 55 parts of polyurethane acrylic resin, 8 parts of isobornyl methacrylate and 10 parts of fluorinated allyl polybutadiene were placed in 100 parts of anhydrous ethanol, and after being fully stirred and mixed, 3 parts of benzoyl peroxide were added, and the temperature was raised to 50°C and stirred for 5 hours. After cooling to room temperature, an anti-corrosion coating was obtained. Example 4
[0026] Preparation of anti-corrosion coatings 70 parts of polyurethane acrylic resin, 10 parts of isobornyl methacrylate and 13 parts of fluorinated allyl polybutadiene were placed in 110 parts of anhydrous ethanol, and after being fully stirred and mixed, 4 parts of diisopropylbenzene peroxide were added, and the temperature was raised to 53°C and stirred for 5.5 hours. After cooling to room temperature, an anti-corrosion coating was obtained. Example 5
[0027] Preparation of anti-corrosion coatings 85 parts of polyurethane acrylic resin, 12 parts of isobornyl methacrylate and 15 parts of fluorinated allyl polybutadiene were placed in 120 parts of anhydrous ethanol, and after being fully stirred and mixed, 5 parts of benzoyl peroxide were added, the temperature was raised to 55°C and stirred for 6 hours, and then the anti-corrosion coating was obtained after being cooled to room temperature. Example 6
[0028] Preparation of anti-corrosion chromium alloy materials Step 1, 100 parts of raw materials whose chemical composition is 2% by mass of C, 20% by mass of Cr, 0.5% by mass of Si, 1.2% by mass of Mn, 0.8% by mass of Ni, 0.5% by mass of Mo, and the rest being Fe are prepared by mixing to obtain a chromium alloy raw material; Step 2: Place the chromium alloy raw material in a medium frequency induction furnace and heat it to 1450°C. After the mixture is fully melted, add 0.3 parts of a composite modifier. After the mixture is completely mixed, transfer the mixture to a mold for pouring. After the pouring is completed, cool it to room temperature and open the mold to obtain a casting. Step 3, the casting is kept at 1000° C. for 3.5 hours in an argon atmosphere, air-quenched to room temperature, and then kept at 500° C. for 5 hours, and cooled to room temperature to obtain a chromium alloy casting; Step 4: evenly apply the anti-corrosion coating on the surface of the chromium alloy casting, and cure it at 80° C. for 2 hours to obtain a corrosion-resistant chromium alloy material. Example 7
[0029] Preparation of anti-corrosion chromium alloy materials Step 1, 130 parts of raw materials whose chemical composition is 2.5% by mass of C, 25% by mass of Cr, 0.6% by mass of Si, 1.3% by mass of Mn, 0.9% by mass of Ni, 0.7% by mass of Mo, and the rest being Fe are prepared by mixing to obtain a chromium alloy raw material; Step 2: Place the chromium alloy raw material in a medium frequency induction furnace and heat it to 1480°C. After the mixture is fully melted, add 1.2 parts of a composite modifier. After the mixture is completely mixed, transfer the mixture to a mold for pouring. After the pouring is completed, cool it to room temperature and open the mold to obtain a casting. Step 3, the casting is kept at 1100° C. for 4 hours in an argon atmosphere, air-quenched to room temperature, and then kept at 550° C. for 5.5 hours, and cooled to room temperature to obtain a chromium alloy casting; Step 4: evenly apply the anti-corrosion coating on the surface of the chromium alloy casting, and cure it at 83° C. for 2.3 hours to obtain a corrosion-resistant chromium alloy material. Example 8
[0030] Preparation of anti-corrosion chromium alloy materials Step 1, 150 parts of raw materials whose chemical composition is 3% by mass of C, 30% by mass of Cr, 0.8% by mass of Si, 1.5% by mass of Mn, 1% by mass of Ni, 0.8% by mass of Mo, and the rest being Fe are prepared by mixing to obtain a chromium alloy raw material; Step 2: Place the chromium alloy raw material in a medium frequency induction furnace and heat it to 1500°C. After the mixture is fully melted, add 2 parts of a composite modifier. After the mixture is completely mixed, transfer the mixture to a mold for pouring. After the pouring is completed, cool it to room temperature and open the mold to obtain a casting. Step 3, the casting is kept at 1200° C. for 5 hours in an argon atmosphere, air-quenched to room temperature, and then kept at 600° C. for 6 hours, and cooled to room temperature to obtain a chromium alloy casting; Step 4: evenly apply the anti-corrosion coating on the surface of the chromium alloy casting, and cure it at 85° C. for 2.5 hours to obtain a corrosion-resistant chromium alloy material.
[0031] Comparative Example 1 Coating preparation 70 parts of polyurethane acrylic resin and 10 parts of isobornyl methacrylate are placed in 110 parts of anhydrous ethanol, and after being fully stirred and mixed, 4 parts of diisopropylbenzene peroxide are added, and the temperature is raised to 53° C. and stirred for 5.5 hours. The coating is obtained after cooling to room temperature.
[0032] Comparative Example 2 Coating preparation 70 parts of polyurethane acrylic resin, 10 parts of isobornyl methacrylate and 13 parts of epoxy-terminated polybutadiene were placed in 110 parts of anhydrous ethanol, and after being fully stirred and mixed, 4 parts of diisopropylbenzene peroxide were added, and the temperature was raised to 53°C and stirred for 5.5 hours. The coating was obtained after cooling to room temperature.
[0033] Comparative Example 3 Coating preparation 70 parts of polyurethane acrylic resin, 10 parts of isobornyl methacrylate and 13 parts of pyrrolidone-based polybutadiene were placed in 110 parts of anhydrous ethanol, and after being fully stirred and mixed, 4 parts of diisopropylbenzene peroxide were added, and the temperature was raised to 53°C and stirred for 5.5 hours. The coating was obtained after cooling to room temperature.
[0034] Comparative Example 4 Preparation of chromium alloy materials Step 1, 130 parts of raw materials whose chemical composition is 2.5% by mass of C, 25% by mass of Cr, 0.6% by mass of Si, 1.3% by mass of Mn, 0.9% by mass of Ni, 0.7% by mass of Mo, and the rest being Fe are prepared by mixing to obtain a chromium alloy raw material; Step 2: Place the chromium alloy raw material in a medium frequency induction furnace and heat it to 1480°C. After the mixture is fully melted, transfer the mixture into a mold for pouring. After the pouring is completed, cool it to room temperature and open the mold to obtain a casting. Step 3, the casting is kept at 1100° C. for 4 hours in an argon atmosphere, air-quenched to room temperature, and then kept at 550° C. for 5.5 hours, and cooled to room temperature to obtain a chromium alloy casting; Step 4: evenly apply the anti-corrosion coating on the surface of the chromium alloy casting, and cure it at 83° C. for 2.3 hours to obtain a chromium alloy material.
[0035] Performance Testing ① The coatings prepared in Examples 3 to 5 and Comparative Examples 1 to 3 were applied to a tinplate that met the specifications, cured at 80°C for 2h, and processed into samples of composite specifications. The samples were subjected to an adhesion grade test according to the reference standard GB / T1727-2021 to determine the adhesion of the samples; the samples were subjected to a 5% neutral salt spray test for 120h according to the reference standard GB / T1771-2007 to determine the corrosion resistance of the samples; the samples were tested for flexibility according to the reference standard GB / T1731-2020; the specific test results are shown in Table 1 below; Table 1:
[0036] It can be seen from Table 1 above that the coatings prepared in Examples 3 to 5 all have excellent adhesion, corrosion resistance and flexibility. The sample prepared in Comparative Example 1 does not contain fluorinated allyl polybutadiene, and has poor adhesion, corrosion resistance and flexibility. The sample prepared in Comparative Example 2 directly adds epoxy-terminated polybutadiene, which has good flexibility but poor corrosion resistance and adhesion. The sample prepared in Comparative Example 3 directly adds pyrrolidone-based polybutadiene, which has excellent adhesion and flexibility, but poor corrosion resistance, because no organic fluorine structure is introduced into the coating.
[0037] ② The chromium alloy materials prepared in Examples 6 to 8 and Comparative Example 4 were made into samples that met the specifications, and the hardness and impact toughness of the samples were tested with reference to the standard GB / T229-2020. The specific test results are shown in Table 2 below; Table 2:
[0038] It can be seen from Table 2 that the samples prepared in Examples 6 to 8 have high hardness and strong impact toughness, while the sample prepared in Comparative Example 4 has low hardness and poor impact toughness. This is because no composite modifier was added to the sample prepared in Comparative Example 4 during the smelting process.
[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0040] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the scope defined by the concept of the invention, they shall all fall within the protection scope of the present invention.
Claims
1. A corrosion-resistant chromium alloy material, characterized in that: The invention consists of a chromium alloy casting and a corrosion-resistant coating coated on the surface thereof; the chromium alloy casting comprises the following raw materials in parts by weight: 100-150 parts of chromium alloy raw materials and 0.3-2 parts of a composite modifier; the corrosion-resistant coating comprises the following raw materials in parts by weight: 55-85 parts of polyurethane acrylic resin, 8-12 parts of isobornyl methacrylate, 10-15 parts of fluorine-containing allyl polybutadiene, 3-5 parts of an initiator and 100-120 parts of anhydrous ethanol; the composite modifier is prepared from a mixture of K, Ca, Na, Mg and Al elements; the fluorine-containing allyl polybutadiene is prepared by the reaction of pyrrolidone-based polybutadiene and 2-(trifluoromethyl)acrylic acid; the pyrrolidone-based polybutadiene is prepared by the reaction of epoxy-terminated polybutadiene and 4-hydroxy-2-pyrrolidone.
2. The anti-corrosion chromium alloy material according to claim 1, characterized in that: The chemical composition of the chromium alloy raw material is 2-3% C, 20-30% Cr, 0.5-0.8% Si, 1.2-1.5% Mn, 0.8-1% Ni, 0.5-0.8% Mo, and the rest is Fe in percentage by mass; the initiator is any one of benzoyl peroxide and diisopropylbenzene peroxide.
3. The anti-corrosion chromium alloy material according to claim 1, characterized in that: The preparation method of the composite modifier comprises the following steps: Potassium carbonate, sodium chloride, silicon-magnesium-calcium alloy and aluminum alloy are mixed, ground and sieved to obtain a composite modifier.
4. The anti-corrosion chromium alloy material according to claim 3, characterized in that: The mass ratio of the potassium carbonate, sodium chloride, silicon-magnesium-calcium alloy and aluminum alloy is 4:3:6:
7.
5. The anti-corrosion chromium alloy material according to claim 3, characterized in that: The average particle size of the composite modifier is 3 mm.
6. The anti-corrosion chromium alloy material according to claim 1, characterized in that: The preparation method of the fluorine-containing allyl polybutadiene comprises the following steps: (1) placing the epoxy-terminated polybutadiene in toluene, stirring thoroughly, adding 4-hydroxy-2-pyrrolidone and a catalyst, heating to 85-90° C. to react for 3-5 hours, and collecting the product after reduced pressure distillation to obtain pyrrolidone-based polybutadiene; (2) Pyrrolidone-based polybutadiene is placed in N,N-dimethylformamide, and after thorough mixing, 2-(trifluoromethyl)acrylic acid and p-toluenesulfonic acid are added, the temperature is raised to react, and the product is collected after reduced pressure distillation to obtain fluorinated allyl polybutadiene.
7. The anti-corrosion chromium alloy material according to claim 6, characterized in that: The catalyst in step (1) is any one of tetrabutylammonium bromide, tetrabutylammonium chloride and tetrabutylammonium hydroxide.
8. The anti-corrosion chromium alloy material according to claim 6, characterized in that: In step (2), the temperature of the temperature-raising reaction is 95-110° C. and the time is 3.5-5 h.
9. A method for preparing the anti-corrosion chromium alloy material according to claim 1, characterized in that: The following steps are involved: Step 1: place polyurethane acrylic resin, isobornyl methacrylate and fluorinated allyl polybutadiene in anhydrous ethanol, stir and mix thoroughly, add initiator, heat to 50-55° C. and stir for 5-6 hours, and cool to room temperature to obtain an anti-corrosion coating; Step 2: Place the chromium alloy raw material in a medium frequency induction furnace and heat it to 1450-1500°C. After the mixture is fully melted, add the composite modifier and wait for it to be completely mixed. Transfer the mixture to a mold for pouring. After pouring, cool it to room temperature and open the mold to obtain a casting. Step 3: In an argon atmosphere, the casting is kept at 1000-1200° C. for 3.5-5 hours, air-quenched to room temperature, and then kept at 500-600° C. for 5-6 hours, and cooled to room temperature to obtain a chromium alloy casting; Step 4: evenly apply the anti-corrosion coating on the surface of the chromium alloy casting, and cure it at 80-85° C. for 2-2.5 hours to obtain a corrosion-resistant chromium alloy material.