A high-performance copper alloy rolling fluid with strong resistance to hard water and impurities and its preparation method

Abstract

This application relates to the field of copper alloy rolling fluid technology, and mainly discloses a high-performance copper alloy rolling fluid with strong resistance to hard water and impurities, and its preparation method. The high-performance copper alloy rolling fluid with strong resistance to hard water and impurities comprises the following components by mass percentage: 76-83% base oil, 1-2% antioxidant, 3-4% oiliness agent, 5-8% extreme pressure anti-wear agent, 7-10% emulsifier, and 0.1-0.5% alkalinity agent. The high-performance copper alloy rolling fluid with strong resistance to hard water and impurities provided by this application has extremely high stability, can cope with various harsh process environments, can effectively cope with environments that may contain hard water and impurities, and can maintain good oil performance for a long time to facilitate copper alloy rolling.

Description

Technical Field

[0001] This application relates to the field of copper alloy rolling fluid technology, and mainly to a high-performance copper alloy rolling fluid with strong resistance to hard water and impurities and its preparation method. Background Technology

[0002] Copper alloy processing fluids are subject to many uncontrollable environmental factors during use, such as hardening of the water used for preparation, dirt in the fluid bath, and contamination by impurities like hydraulic oil from the rolling mill. Therefore, a stable copper alloy rolling fluid is needed to address these issues. Unstable rolling fluids are prone to chemical changes during use, leading to deterioration and foul odors. This not only affects rolling performance but can also damage the rolling mill and the rolled material. Insufficient stability can also impair lubrication, increasing friction and energy consumption during rolling, and negatively impacting the surface quality of the copper material. A crucial function of rolling fluids is cooling the rolls and the rolled material; poor stability can significantly reduce cooling effectiveness, preventing timely heat dissipation and affecting rolling efficiency and product quality. Unstable rolling fluids may contain harmful components that corrode mill parts and shorten its lifespan. Furthermore, the stability of the rolling fluid can lead to instability in the rolling process, resulting in uneven thickness, width, and other dimensions of the rolled copper material, affecting product quality and consistency.

[0003] Therefore, a qualified copper alloy rolling fluid should have the following characteristics: (1) good extreme pressure anti-wear performance to ensure the smoothness and cleanliness of the rolled plate and the surface after rolling; (2) good anti-corrosion and anti-rust performance to ensure that the rolling mill equipment and strip storage are not corroded; (3) good cleaning performance, the rolling fluid will not produce precipitates during use, is compatible with hydraulic oil and gear oil, and will not change its performance or produce defects such as dirt marks due to a small amount of leakage of impurities; (4) good cooling performance, which can quickly remove the heat generated during rolling, reduce the temperature of the rolls and rolled pieces, and prevent problems such as copper strip oxidation and discoloration caused by excessive temperature; (5) good high temperature stability, during the rolling process, a large amount of heat will be generated due to high-speed rolling, and the rolling fluid needs to be able to remain stable at high temperatures without failure or deterioration.

[0004] Based on currently available information such as Chinese invention patents CN103756768A, CN105255573A, CN104342274A, and CN103756768A, the copper alloy rolling fluid described has the following problems: (1) It has poor long-term stability and is easily affected by environmental factors such as temperature, pH, and water quality, resulting in decomposition or precipitation and a decline in the performance of the rolling fluid; (2) The use of TX series emulsifiers may be defined as endocrine disruptors, which have a certain impact on the environment. If such emulsifiers remain in the copper rolling fluid, they will affect the lubrication and cooling performance, and may even corrode the rolls and copper materials. In severe cases, it may cause skin allergies in factory workers. The copper alloy processing fluid schemes described in the existing public information are not conducive to the environmentally friendly and green development of my country's manufacturing industry, nor can they ensure high lubricity and good cooling in the rolling process. Furthermore, the reason for the aforementioned two problems lies in the fact that these copper alloy processing fluid solutions failed to align with national environmental protection standards regarding the characteristics of copper metal and the rolling process, neglecting to adjust the formulation according to the properties of additives, and also failing to consider the long-term service life of the rolling fluid. Therefore, it is necessary to develop a high-performance copper alloy rolling fluid with good stability and extremely strong resistance to hard water and impurities. Consequently, existing technologies require further improvement and development. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide a high-performance copper alloy rolling fluid with strong resistance to hard water and impurities and a method for its preparation, in order to solve the problems of insufficient long-term stability of existing copper alloy rolling fluids and the easy residue of TX emulsifiers that cause corrosion.

[0006] The technical solution of this application is as follows:

[0007] In a first aspect, this application provides a high-performance copper alloy rolling fluid with strong resistance to hard water and impurities in oil, wherein, by mass percentage, it comprises the following components:

[0008] Base oil 76-83%, antioxidant 1-2%, oiliness agent 3-4%, extreme pressure anti-wear agent 5-8%, emulsifier 7-10%, alkalinity agent 0.1-0.5%.

[0009] The high-performance copper alloy rolling fluid with strong resistance to hard water and mixed oil provided in this application has extremely strong stability and can cope with various harsh process environments. It can effectively cope with environments that may be mixed with hard water and mixed oil, and can maintain good oil performance for a long time so that copper alloy rolling can proceed.

[0010] Furthermore, the base oil is a combination of 24° palm oil, coconut oil, and transformer oil, wherein the mass ratio of the 24° palm oil, coconut oil, and transformer oil is 9:2:5.

[0011] Furthermore, the antioxidant is one or more of aromatic amine antioxidants, hindered phenolic antioxidants, and thio-assisted antioxidants.

[0012] Furthermore, the hindered phenolic antioxidant is alkylbicyclohexylphenol and high molecular weight hindered phenol, and the aromatic amine antioxidant is oleoylsarcosine.

[0013] Furthermore, the antioxidant is a combination of alkylbicyclohexylphenol, high molecular weight hindered phenol and oleoylsarcosine, wherein the mass ratio of alkylbicyclohexylphenol, high molecular weight hindered phenol and oleoylsarcosine is 5:6:6.

[0014] Furthermore, the oiliness agent is a combination of vegetable oleic acid and 165C polyester, wherein the mass ratio of vegetable oleic acid to 165C polyester is 2:1.

[0015] Furthermore, the extreme pressure anti-wear agent is a combination of alkyl phosphate ammonium salt, fatty acid polyethylene glycol ether phosphate, phosphate ammonium compound and sulfurized fatty acid ester, wherein the mass ratio of alkyl phosphate ammonium salt, fatty acid polyethylene glycol ether phosphate, phosphate ammonium compound and sulfurized fatty acid ester is 2:2:3:1.

[0016] Furthermore, the emulsifier is a combination of fatty alcohol ether carboxylate Geropon HW15, fatty alcohol polyoxyethylene ether, and Span-80, wherein the mass ratio of fatty alcohol ether carboxylate Geropon HW15, fatty alcohol polyoxyethylene ether, and Span-80 is 5:5:4.

[0017] Furthermore, the alkaline agent is dicyclohexylamine.

[0018] Secondly, this application also provides a method for preparing a high-performance copper alloy rolling fluid with strong resistance to hard water and impurities as described in the first aspect, comprising the following steps:

[0019] Add the base oil to the container and mix, stirring at 55-60°C until clear and transparent;

[0020] Add the oiling agent and stir at 55-60℃ until clear and transparent;

[0021] Add antioxidants and stir at 55-60℃ until clear and transparent;

[0022] Add the extreme pressure anti-wear agent and stir at 55-60℃ until clear and transparent;

[0023] Add the emulsifier and stir at 55-60℃ until clear and transparent;

[0024] Add an alkaline agent and stir at 55-60℃ until clear and transparent to obtain the high-performance copper alloy rolling fluid with strong resistance to hard water and impurities.

[0025] Beneficial effects: The high-performance copper alloy rolling fluid with strong resistance to hard water and mixed oil provided in this application has extremely strong stability and can cope with various harsh process environments. It can effectively cope with environments that may be mixed with hard water and mixed oil, and can maintain good oil performance for a long time so that copper alloy rolling can be carried out. Detailed Implementation

[0026] This application provides a high-performance copper alloy rolling fluid with strong resistance to hard water and impurities, and a method for preparing the same. To make the objectives, technical solutions, and effects of this application clearer and more explicit, the following provides a more detailed description. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0027] This application provides a high-performance copper alloy rolling fluid with strong resistance to hard water and impurities, wherein, by mass percentage, it comprises the following components:

[0028] Base oil 76-83%, antioxidant 1-2%, oiliness agent 3-4%, extreme pressure anti-wear agent 5-8%, emulsifier 7-10%, alkalinity agent 0.1-0.5%.

[0029] The high-performance copper alloy rolling fluid with strong resistance to hard water and mixed oil provided in this application has extremely strong stability and can cope with various harsh process environments. It can effectively cope with environments that may be mixed with hard water and mixed oil, and can maintain good oil performance for a long time so that copper alloy rolling can proceed.

[0030] Specifically, the high-performance copper alloy rolling fluid with strong resistance to hard water and impurities provided in this application can be diluted and emulsified into a working fluid before use. The mass percentage of the original high-performance copper alloy rolling fluid with strong resistance to hard water and impurities in the working fluid is 2%-5%.

[0031] Furthermore, the base oil is a combination of 24° palm oil, coconut oil, and transformer oil, with a mass ratio of 9:2:5.

[0032] In this application, by using a blend of mineral oil and vegetable oil as the base oil, the advantages of both can be combined to provide more comprehensive performance for the rolling process of copper alloys. Transformer oil, mainly derived from petroleum distillates and obtained through refining and processing, possesses excellent lubrication properties and stability due to its compositional characteristics. Its stable molecular structure allows transformer oil to provide continuous lubrication during metal processing, reducing friction and wear. The selected 24° palm oil and coconut oil have excellent biodegradability and renewability, meeting current environmental and sustainable development requirements. Moreover, 24° palm oil and coconut oil are derived from natural plants, and their molecular structure contains natural lubricating components, making the plant oil system lubricant perform excellently in high-force rolling, high-speed cutting, and precision machining applications. Its biodegradability also means a smaller environmental impact during waste disposal. Therefore, the base oil combination in this application, which blends 24° palm oil, coconut oil, and transformer oil, combines the advantages of each raw material. This blended base oil combination possesses both the good lubrication properties and stability of mineral oil and the excellent biodegradability and renewability of vegetable oil.

[0033] More specifically, 24° palm oil is a high-quality lubricant that exhibits good lubrication and antioxidant properties during rolling; coconut oil has a high proportion of medium-chain saturated fatty acids and small molecules, resulting in excellent permeability, stability, and antibacterial properties. By combining 24° palm oil and coconut oil, the lubrication distribution is improved. At the same time, the good permeability allows the oil to penetrate deep into the contact surface between the rolls and the copper alloy, providing deep lubrication. In addition, when combined with transformer oil, which has extremely high thermal conductivity, heat between the rolls can be quickly transferred to achieve a rapid cooling effect, reduce thermal deformation, and prevent the accumulation of heat from causing oxidation or affecting the lubrication performance of the oil.

[0034] Furthermore, the antioxidant is one or more of aromatic amine antioxidants, hindered phenolic antioxidants, and thio-assisted antioxidants; the hindered phenolic antioxidants are alkyl dicyclohexylphenol and high molecular weight hindered phenols; the aromatic amine antioxidant is oleoylsarcosine.

[0035] In this application, the use of antioxidants can significantly inhibit the oxidation reaction of oils and effectively prevent the rolling fluid from deteriorating due to oxidation, enhance the stability of the rolling fluid, enable it to maintain excellent performance under various external factors, and further extend the service life of the oil. At the same time, the use of antioxidants can also effectively increase the initial oxidation temperature of the rolling fluid.

[0036] Furthermore, the antioxidant is a combination of alkylbicyclohexylphenol, high molecular weight hindered phenol, and oleoylsarcosine, with a mass ratio of 5:6:6.

[0037] In this application, the preferred antioxidant combination not only has high physical and chemical stability, which can delay the oxidative deterioration of the rolling fluid and thus extend its storage time, but also has excellent extreme pressure performance, which greatly improves the lubricity of the oil and can also be used as an extreme pressure anti-wear agent and metal corrosion inhibitor.

[0038] Specifically, antioxidants primarily inhibit oxidation reactions by scavenging free radicals. Alkyl dicyclohexylphenol, with its alkyl substituents, can react rapidly with free radicals, preventing further oxidation chain reactions and thus inhibiting the oxidation process. When oils are exposed to external factors such as oxygen and light, generating free radicals, antioxidants can react with these free radicals, neutralizing their activity and preventing a chain reaction of oxidation. High molecular weight hindered phenolic antioxidants have good compatibility with organic materials, making them suitable as antioxidant stabilizers for various polymers and organic materials. Furthermore, high molecular weight hindered phenolic antioxidants are well-compatible with alkyl dicyclohexylphenol; their combination not only achieves highly efficient antioxidant and slow-release performance but also enhances the stability of the system, thus making them suitable for compound use. Oleyl sarcosine is an amphoteric organic compound and a versatile surfactant that can be used as an antioxidant, emulsifier, stabilizer, and lubricant. Therefore, in this formulation, it not only provides rust prevention, slow-release, and antioxidant properties but also promotes emulsification, maintains the stability of the emulsion, and contributes to the emulsion's resistance to hard water and mixed oils.

[0039] Furthermore, the oiling agent is a combination of vegetable oleic acid and 165C polyester, with a mass ratio of vegetable oleic acid to 165C polyester of 2:1.

[0040] In this application, a combination of vegetable oleic acid and 165C polyester with polar groups at the ends of the hydrocarbon chains is used as an oiling agent. This combination exhibits a strong affinity for metals and can adsorb onto the friction surface through the polar groups, forming a molecularly oriented adsorption film that prevents metal-to-metal contact, thereby reducing friction and wear. Specifically, the selected vegetable oleic acid has good lubrication properties and load-bearing capacity, but its antioxidant properties and low-temperature flow properties are slightly inferior. This application uses 165C polyester, which has better high-temperature resistance, antioxidant properties, and hydrolysis resistance compared to other oiling agents. After compounding, the overall performance of the oiling agent is improved.

[0041] Furthermore, the extreme pressure anti-wear agent is a combination of alkyl phosphate ammonium salt, fatty acid polyethylene glycol ether phosphate, phosphate ammonium compound, and sulfurized fatty acid ester, with a mass ratio of alkyl phosphate ammonium salt, fatty acid polyethylene glycol ether phosphate, phosphate ammonium compound, and sulfurized fatty acid ester of 2:2:3:1.

[0042] Specifically, during the rolling process, significant pressure and friction are generated between metal surfaces, necessitating the rolling fluid to provide excellent lubrication. The extreme pressure anti-wear agent combination selected in this application can form a lubricating film on the copper alloy surface, reducing the coefficient of friction and thus decreasing frictional heat and wear. This not only protects the copper alloy surface from scratches or wear but also improves the stability and efficiency of the rolling process. Furthermore, the alkyl phosphate ammonium salts, fatty acid polyethylene glycol ether phosphates, and phosphate ammonium compounds used possess anti-wear properties, while the sulfurized fatty acid esters used exhibit extreme pressure properties. The effective combination of phosphorus- and sulfur-containing compounds further enhances the extreme pressure anti-wear performance. The advantage of alkyl phosphate ammonium salts is their extremely low or even non-corrosive effect on metals compared to other extreme pressure agents, thus providing both lubrication and slow-release properties. Fatty acid polyethylene glycol ether phosphates are phosphate esters polymerized from fatty acid polyethylene glycol ethers, possessing both emulsifying and lubricating properties. They can be used as both extreme pressure anti-wear agents and anti-hard water emulsifiers, and remain hydrolyzed stable in environments with pH > 3. Phosphate ammonium compounds and sulfurized fatty acid esters primarily enhance extreme pressure anti-wear properties. The optimal lubrication effect is achieved when used in the provided ratio combination. Furthermore, this extreme pressure anti-wear agent combination improves the load-bearing capacity of the rolling fluid, maintaining good lubrication performance under extreme conditions such as high pressure and high temperature, ensuring smooth rolling processes.

[0043] Furthermore, the emulsifier is a combination of fatty alcohol ether carboxylate Geropen HW15, fatty alcohol polyoxyethylene ether, and Span-80, with a mass ratio of fatty alcohol ether carboxylate Geropen HW15, fatty alcohol polyoxyethylene ether, and Span-80 of 5:5:4.

[0044] Specifically, due to limitations in production conditions, many copper alloy rolling fluid plants have large fluid tanks, few agitation devices, and use hard water, especially in northern plants. Therefore, the ability of the rolling fluid to emulsify well in hard water is crucial. This application uses a compound of fatty alcohol ether carboxylate Geropen HW15, fatty alcohol polyoxyethylene ether, and Span-80 in appropriate proportions, exhibiting extremely strong resistance to hard water. It can emulsify and remain stable in hard water, and tests showed that adding small amounts of rolling oil, hydraulic oil, and other miscellaneous oils did not affect its performance. The role of the emulsifier combination in the rolling fluid formulation of this application is mainly to enable the rolling fluid to form a more stable and uniform emulsion, allowing it to better perform its lubrication and cooling functions. Moreover, since the rolling fluid system of this application contains easily corrosive sulfur and phosphorus agents, the emulsifier combination used can also help reduce the corrosion of the rolling fluid on the rolls and workpieces. The fatty alcohol ether carboxylates used have strong resistance to hard water and can quickly combine with calcium and magnesium ions to form stable complexes, effectively inhibiting soap scum formation. The fatty alcohol polyoxyethylene ether used, as a nonionic surfactant, has excellent emulsifying properties, which can evenly disperse grease and stains in water, enhance washing power, and stabilize emulsion formation, making the emulsion more uniform and delicate. The Span-80 used is mild and environmentally friendly, with good biodegradability, and will not pollute water bodies and soil.

[0045] More specifically, fatty alcohol ether carboxylates and fatty alcohol polyoxyethylene ethers have relatively high HLB values ​​and good water solubility. However, simply compounding them with high-HLB surfactants cannot achieve the ideal self-emulsification effect. Adding Span-80 with a low HLB value, i.e., using a combination of high-HLB and low-HLB surfactants, can form a tighter complex at the interface, preventing aggregation and thus improving the stability of the emulsion. Therefore, it can solve the problem of lack of stirring in the plant and greatly reduce the plant construction cost. In the formulation system of this application, fatty alcohol ether carboxylates, fatty alcohol polyoxyethylene ethers, and Span-80 are used as a combination of emulsifiers. The emulsion pairs are tightly linked, exhibiting excellent resistance to impurities and being less affected by the liquid tank environment, thus extending the service life of the rolling fluid. Moreover, the emulsification effect of Span-80 and fatty alcohol polyoxyethylene ethers is better in hard water after compounding. As site conditions change, the water quality becomes harder, and the amount of iron powder and impurities in the liquid tank increases, the emulsification in hard water is more stable.

[0046] Furthermore, the alkalinizing agent is dicyclohexylamine. The formulation system of this application selects dicyclohexylamine as the alkalinizing agent, which can stabilize the pH of the rolling solution, prevent its decomposition and precipitation, ensure the lifespan of the rolling solution, and also facilitate the stable use of the rolling solution at different pH values ​​and temperatures.

[0047] Specifically, dicyclohexylamine is mainly used to adjust the pH value, maintaining the pH of the emulsion above 6.0. A suitable pH helps maintain the stability of the rolling fluid and prevents some harmful chemical reactions. By adjusting the pH, dicyclohexylamine can improve the lubrication performance of the rolling fluid to a certain extent, reducing frictional resistance during rolling. Furthermore, the maintained alkaline environment helps inhibit the formation of iron oxide scale on the rolling equipment, thereby reducing surface defects in copper alloy rolled products and improving product quality. Dicyclohexylamine can also precipitate some acidic impurities, helping to keep the rolling fluid clean. Moreover, dicyclohexylamine not only adjusts the pH of the emulsion but also forms a protective film on the metal surface during use, further reducing heat, copper strip wear, and corrosion during processing.

[0048] The high-performance copper alloy rolling fluid with strong resistance to hard water and mixed oil provided in this application has extremely strong stability and can cope with various harsh process environments. It can effectively cope with environments that may be mixed with hard water and mixed oil, and can maintain good oil performance for a long time so that copper alloy rolling can proceed.

[0049] This application also provides a method for preparing the high-performance copper alloy rolling fluid with strong resistance to hard water and impurities as described above, comprising the following steps:

[0050] Slowly add the base oil to the container and mix, stirring at 55-60°C until clear and transparent;

[0051] Then slowly add the oiling agent and stir at 55-60℃ until clear and transparent;

[0052] Then slowly add the antioxidant and stir at 55-60℃ until clear and transparent;

[0053] Then slowly add the extreme pressure anti-wear agent and stir at 55-60℃ until clear and transparent;

[0054] Then slowly add the emulsifier and stir at 55-60℃ until clear and transparent;

[0055] Then slowly add the alkaline agent and stir at 55-60℃ until clear and transparent to obtain a high-performance copper alloy rolling slurry with strong resistance to hard water and impurities.

[0056] The provided preparation method is simple and efficient, and can be easily adjusted for large-scale production.

[0057] The following specific examples provide further details.

[0058] 1. Sources of raw materials in the embodiments and comparative examples of this application:

[0059] 24° Palm Oil: Yihai Kerry Arawana Grain & Oil Food Co., Ltd.

[0060] Transformer oil: Foshan Jinjian Lubricating Oil Co., Ltd.;

[0061] Coconut oil: Yihai Kerry Arawana Grain & Oil Food Co., Ltd.;

[0062] Alkylbicyclohexylphenol: Zhongshan Yuanda New Materials Co., Ltd.;

[0063] High molecular weight sterically hindered histidines: Guangzhou Qisheng Trading Co., Ltd.;

[0064] Oleylsarcosine: Guangzhou Qisheng Trading Co., Ltd.;

[0065] Vegetable oleic acid: Shandong Chuangli New Materials Co., Ltd.;

[0066] 165C Polyester: Guangzhou Mickey Chemical Co., Ltd.;

[0067] Alkyl phosphates: Solvay Group;

[0068] Fatty acid polyethylene glycol ether phosphate: Tianjin Haoruisen Chemical Trading Co., Ltd.;

[0069] Phosphoamine compounds: Vanderbilt Chemicals, LLC;

[0070] Sulfated fatty acid esters: Dongguan Hongli Chemical Technology Co., Ltd.;

[0071] Geropon HW15 fatty alcohol ether carboxylate: Guangzhou Qisheng Trading Co., Ltd.;

[0072] Fatty alcohol polyoxyethylene ether: Tianjin Haoruisen Chemical Trading Co., Ltd.;

[0073] Span-80: Haian Petrochemical Plant, Jiangsu Province;

[0074] Sodium petroleum sulfonate (molecular weight < 490): Haian Petrochemical Plant, Jiangsu Province;

[0075] TX-10: Xingtai Xinlanxing Technology Co., Ltd.

[0076] Dicyclohexylamine: Shandong Zhuoan Chemical Co., Ltd.;

[0077] 2. The preparation method of the high-performance copper alloy rolling fluid with strong resistance to hard water and impurities in this application includes the following steps:

[0078] (1) Slowly add the base oil to a clean beaker and mix, stirring at 55-60℃ until the solution is clear and transparent;

[0079] (2) Slowly add the oily agent to the mixed solution obtained in step (1) and stir at 55-60℃ until the solution is uniform to obtain a light yellow clear and transparent liquid;

[0080] (3) Slowly add antioxidant to the mixed solution obtained in step (2) and stir at 55-60℃ until the solution is uniform to obtain a light yellow clear and transparent liquid;

[0081] (4) Slowly add extreme pressure anti-wear agent to the mixed solution obtained in step (3), and stir at 55-60℃ until the solution is uniform to obtain a clear and transparent brownish-red liquid;

[0082] (5) Slowly add emulsifier to the mixed solution obtained in step (4) and stir at 55-60℃ until the solution is uniform to obtain a clear and transparent brownish-red liquid;

[0083] (6) Slowly add an alkaline agent to the mixed solution obtained in step (5) and stir at 55-60℃ until the solution is homogeneous to obtain a clear and transparent brownish-red liquid.

[0084] Specifically, the mixing temperature is 60℃.

[0085] 3. Performance testing method of this application embodiment:

[0086] (1) The test objects of the present invention are the high-performance copper alloy rolling fluid with strong resistance to hard water and impurities and oil in the embodiment, and the high-performance copper alloy rolling fluid with strong resistance to emulsification and impurities and oil in the comparative example.

[0087] (2) The test methods for viscosity, acid value and saponification value at 40°C shall be carried out in accordance with GB / T 265, GB / T 264 and GB / T8021-2003 respectively for the raw rolling solution.

[0088] (3) The performance of the emulsion was tested using the test methods of pH value, conductivity, emulsion stability and particle size, respectively, in accordance with GB 5009.237-2016, GB / T 11007-2008, SH / T 0579-1994 and GB / T 19077-2016, to evaluate the emulsification performance of the lubricating oil.

[0089] (4) The extreme pressure performance test method shall be in accordance with GB / T 12583-1998. Tester model: Xiamen Tianji MS-10A.

[0090] (5) Test method for copper corrosion resistance: The rolling fluid raw solution shall be tested in accordance with GB / T 5096-2017.

[0091] (6) Anti-mixed oil test: L-HM hydraulic oil (used for rolling mill maintenance) was mixed into 2.0% rolling fluid emulsion at mass ratios of 1%, 2%, 3%, 4% and 5% respectively (the mass ratio of the original rolling fluid was 2%), and the stability of the emulsion was tested according to SH / T 0579-1994.

[0092] (7) Self-emulsification test: Add the raw rolling solution to tap water (conductivity 120μS / cm, which can be compared with the factory tap water) at a ratio of 2%, stir evenly with a glass rod, observe the emulsification status of the rolling solution and record whether floating oil appears after the emulsion has been left to stand for 5 minutes.

[0093] Using the above preparation method, the rolling solution stock solutions of Examples 1, 2, 3, 4, 5 and Comparative Example 1 were prepared according to the components in Table 1. The component ratios are shown in Table 1.

[0094] Table 1

[0095] Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 24° Palm Oil 45% 45% 45% 45% 44.5% 47% Coconut oil 10% 10% 10% 10% 10% 10% Transformer oil 25% 25% 25% 25% 25% 25% Alkylbicyclohexylphenol 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% High molecular weight sterically hindered phenols 0.6% 0.6% 0.6% 0.6% 0.6% 0.6% Oleylsarcosine 0.6% 0.6% 0.6% 0.6% 0.6% 0.6% Plant oleic acid 2% 2% 2% 2% 2% 2% 165C Polyester 1% 1% 1% 1% 1% 1% Alkyl phosphates 2% 2% 2% 2% 2% 2% Fatty acid polyethylene glycol ether phosphate 2% 2% 2% 2% 2% 2% Phosphoamine compounds 3% 3% 3% 3% 3% 3% Sulfated fatty acid esters 1% 1% 1% 1% 1% 1% Geropen HW15 fatty alcohol ether carboxylate 2.5% 2.5% 2.5% 2.5% - 2% Fatty alcohol polyoxyethylene ether 2.5% - 2.5% - - 2% Span-80 2% 2% - - - 1% Sodium petroleum sulfonate (molecular weight < 490) - 2.5% - 2.5% 2.5% - TX-10 - - 2% 2% 5% - Dicyclohexylamine 0.3% 0.3% 0.3% 0.3% 0.3% 0.3%

[0096] The self-emulsifying test results of Examples 1, 2, 3, 4, 5 and Comparative Example 1 are shown in Table 2:

[0097] Table 2

[0098] sample After stirring Let stand for 5 minutes Example 1 It can be completely emulsified into a milky white liquid. No obvious floating oil Example 2 Partially emulsified, uneven, milky yellow liquid. Large amount of floating oil in the upper layer Example 3 Partially emulsified, uneven, milky yellow liquid. Large amount of floating oil in the upper layer Example 4 Partially emulsified, uneven, milky yellow liquid. Large amount of floating oil in the upper layer Example 5 It can be completely emulsified into a milky white liquid. Trace amount of floating oil Comparative Example 1 It can be completely emulsified into a milky white liquid. No obvious floating oil

[0099] Comparing the self-emulsification test results, it can be found that Laboratory Example 1, Example 5 and Comparative Example 1 have good self-emulsification properties, can emulsify in hard water and remain basically stable; the emulsion pairs of Example 2, Example 3 and Example 4 were not leveled, and their self-emulsification properties were relatively poor.

[0100] The physicochemical properties of the rolling solution stock from Examples 1, 5, and Comparative Example 1 are shown in Table 3:

[0101] Table 3

[0102] Physicochemical indicators Example 1 Example 5 Comparative Example 1 <![CDATA[Viscosity at 40°C, mm 2 / s]]> 39.88 40.25 38.25 Acid value, mgKOH / g 6.27 7.52 6.13 Saponification value, mgKOH / g 193.33 194.02 194.56 Copper corrosion resistant 1a 1a 1a

[0103] Based on the physicochemical properties of the rolling fluid stock solutions in Examples 1, 5 and Comparative Example 1, the ratio of base oil and oiliness agent is reasonable, and the amount of antioxidant added is reasonable, which enables the formulation to achieve good resistance to copper corrosion.

[0104] The physicochemical properties of the emulsions with a stock solution mass ratio of 2% in Examples 1, 5, and Comparative Example 1 are shown in Table 4:

[0105] Table 4

[0106] Physicochemical properties of 2% emulsion Example 1 Example 5 Comparative Example 1 pH 6.57 6.99 6.55 Electrical conductivity, μS / cm 131.5 132.1 130.7 ESI, % (Emulsion Stability) 99.48 89.6 95.21 PSD, μm (particle size) 2.319 2.789 2.512

[0107] The ESI test results show that Example 1 exhibits better static stability at high temperatures compared to Comparative Examples 1 and 5; the average particle size (PSD) test results show that the emulsion particles in Example 1 are more uniformly dispersed than those in Comparative Examples 1 and 5. In other words, the emulsion stability using sodium petroleum sulfonate and the TX-10 series emulsifier is worse than that using a blend of fatty alcohol polyoxyethylene ether and Span 80.

[0108] The results of the anti-smudge oil test for the emulsions of Examples 1, 5, and Comparative Example 1, with a stock solution mass ratio of 2%, are shown in Table 5:

[0109] Table 5

[0110] 2% emulsion mixed with oil Example 1 Example 5 Comparative Example 1 ESI (1% L-HM hydraulic oil), % 99.34 88.32 94.35 ESI (2% L-HM hydraulic oil), % 99.32 85.29 92.12 ESI (3% L-HM hydraulic oil), % 98.15 82.18 90.88 ESI (4% L-HM hydraulic oil), % 97.52 79.79 89.17 ESI (5% L-HM hydraulic oil), % 96.05 77.21 87.52

[0111] Comparing the results of the anti-smuggled oil tests of Example 1, Example 5 and Comparative Example 1, it can be found that Example 1 has the best compatibility with smuggled oil, and the smuggled oil does not significantly damage the stability of the emulsion in Example 1.

[0112] The extreme pressure performance test results of the emulsions with a stock solution mass ratio of 2% in Examples 1, 5, and Comparative Example 1 are shown in Table 6:

[0113] Table 6

[0114] 2% emulsion extreme pressure performance Example 1 Example 5 Comparative Example 1 PB, Kg 100 100 100 PD, Kg 160 160 160

[0115] Comparing the extreme pressure performance test results of Example 1, Example 5 and Comparative Example 1, it can be found that the lubricant addition ratio in the formulation system of this application is reasonable, the extreme pressure performance is good, and the copper alloy rolling fluid can meet the lubrication requirements and has high lubrication performance.

[0116] Using a certain brand of emulsified copper alloy rolling fluid as Comparative Example 2, the self-emulsifying test results of Example 1 and Comparative Example 2 are shown in Table 7:

[0117] Table 7

[0118] sample After stirring Let stand for 5 minutes Example 1 It can be completely emulsified into a milky white liquid. No obvious floating oil Comparative Example 2 It can be completely emulsified into a milky white liquid. No obvious floating oil

[0119] Both Example 1 and Comparative Example 2 were completely emulsified, and no obvious floating oil was observed after standing.

[0120] The results of the anti-smudge oil test for the emulsions of Example 1 and Comparative Example 2, with a stock solution mass ratio of 2%, are shown in Table 8:

[0121] Table 8

[0122] 2% emulsion mixed with oil Example 1 Comparative Example 2 ESI (1% L-HM hydraulic oil), % 99.34 94.56 ESI (2% L-HM hydraulic oil), % 99.32 92.44 ESI (3% L-HM hydraulic oil), % 98.15 90.57 ESI (4% L-HM hydraulic oil), % 97.52 87.67 ESI (5% L-HM hydraulic oil), % 96.05 84.32

[0123] Comparing the results of the anti-traditional oil test, it can be found that Comparative Example 2 has poorer compatibility with trace amounts of trace amounts of oil compared to Example 1, and the trace amounts of oil have a higher degree of destructive effect on the stability of the emulsion in Comparative Example 2.

[0124] The high-performance copper alloy rolling fluid with strong resistance to hard water and mixed oil provided in this application has extremely strong stability and can cope with various harsh process environments. It can effectively cope with environments that may be mixed with hard water and mixed oil, and can maintain good oil performance for a long time so that copper alloy rolling can proceed.

[0125] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of this application.

Claims

1. A high-performance copper alloy rolling fluid with strong resistance to hard water and impurities, characterized in that, Calculated by mass percentage, it includes the following components: Base oil 76-83%, antioxidant 1-2%, oiliness agent 3-4%, extreme pressure anti-wear agent 5-8%, emulsifier 7-10%, alkalinity agent 0.1-0.5%; The base oil is a combination of 24° palm oil, coconut oil, and transformer oil; The extreme pressure anti-wear agent is a combination of alkyl phosphate ammonium salt, fatty acid polyethylene glycol ether phosphate, phosphate ammonium compound and sulfurized fatty acid ester; The emulsifier is a combination of fatty alcohol ether carboxylate Geropen HW15, fatty alcohol polyoxyethylene ether, and Span-80, wherein the mass ratio of fatty alcohol ether carboxylate Geropen HW15, fatty alcohol polyoxyethylene ether, and Span-80 is 5:5:

4.

2. The high-performance copper alloy rolling fluid with strong resistance to hard water and impurities as described in claim 1, characterized in that, The mass ratio of the 24° palm oil, coconut oil, and transformer oil is 9:2:

5.

3. The high-performance copper alloy rolling fluid with strong resistance to hard water and impurities as described in claim 1, characterized in that, The antioxidant is one or more of aromatic amine antioxidants, hindered phenolic antioxidants, and thio-assisted antioxidants.

4. The high-performance copper alloy rolling fluid with strong resistance to hard water and impurities as described in claim 3, characterized in that, The hindered phenolic antioxidant is alkylbicyclohexylphenol and high molecular weight hindered phenol, and the aromatic amine antioxidant is oleoylsarcosine.

5. The high-performance copper alloy rolling fluid with strong resistance to hard water and impurities as described in claim 4, characterized in that, The antioxidant is a combination of alkylbicyclohexylphenol, high molecular weight hindered phenol and oleoyl sarcosine, wherein the mass ratio of alkylbicyclohexylphenol, high molecular weight hindered phenol and oleoyl sarcosine is 5:6:

6.

6. The high-performance copper alloy rolling fluid with strong resistance to hard water and impurities as described in claim 1, characterized in that, The oiliness agent is a combination of vegetable oleic acid and 165C polyester, wherein the mass ratio of vegetable oleic acid to 165C polyester is 2:

1.

7. The high-performance copper alloy rolling fluid with strong resistance to hard water and impurities as described in claim 1, characterized in that, The mass ratio of the alkyl phosphate ammonium salt, fatty acid polyethylene glycol ether phosphate, phosphate ammonium compound and sulfurized fatty acid ester is 2:2:3:

1.

8. The high-performance copper alloy rolling fluid with strong resistance to hard water and impurities as described in claim 1, characterized in that, The alkaline agent is dicyclohexylamine.

9. A method for preparing a high-performance copper alloy rolling fluid with strong resistance to hard water and impurities as described in any one of claims 1-8, characterized in that, Includes the following steps: Add the base oil to the container and mix, stirring at 55-60°C until clear and transparent; Add the oiling agent and stir at 55-60℃ until clear and transparent; Add antioxidants and stir at 55-60℃ until clear and transparent; Add the extreme pressure anti-wear agent and stir at 55-60℃ until clear and transparent; Add the emulsifier and stir at 55-60℃ until clear and transparent; Add an alkaline agent and stir at 55-60℃ until clear and transparent to obtain the high-performance copper alloy rolling fluid with strong resistance to hard water and impurities.