Hydrogen gas turbine oil composition, method of making and use thereof

Abstract

This invention relates to a hydrogen gas turbine oil composition, its preparation method, and its application. By weight, it comprises: 99.120–99.459 parts of hydrogenated mineral oil; 0.02–0.05 parts of extreme pressure anti-wear agent; 0.01–0.02 parts of demulsifier; 0.45–0.65 parts of antioxidant; 0.02–0.05 parts of metal deactivator; 0.04–0.06 parts of rust inhibitor; and 0.001–0.05 parts of antifoaming agent. The antioxidant is a mixture of alkylphenyl-α-naphthylamine, N-phenyl-α-naphthylamine, and triphosphite. The weight ratio of alkylphenyl-α-naphthylamine, N-phenyl-α-naphthylamine, and triphosphite is (4–12):(1–2):(4–8). This invention relates to a hydrogen gas turbine oil composition that utilizes an additive compounding system to improve the oil's resistance to metal corrosion and extreme pressure anti-wear properties while significantly reducing sludge precipitation and varnish formation, thus extending the oil's service life. The base oil is mineral oil. This formulation effectively balances the adverse effects of extreme pressure agents on the oil's rust prevention and thermal oxidation stability. Various additives exhibit good compatibility and synergistic effects, resulting in excellent performance that meets the requirements for use in hydrogen gas turbine equipment.

Description

Technical Field

[0001] This invention relates to a hydrogen gas turbine oil composition and to the field of turbine oil technology. Background Technology

[0002] Hydrogen gas turbines are a new type of high-end gas turbine equipment that uses hydrogen as the combustion medium. Hydrogen gas turbine oil is used to power hydrogen fuel gas turbines. Hydrogen and natural gas have different thermophysical and chemical properties, resulting in significant differences in their combustion characteristics. Hydrogen gas turbines using hydrogen as fuel face operational challenges such as backfire, spontaneous combustion, higher NOx emissions, and instability. This presents the following challenges for turbine oil products used in hydrogen gas turbines (hereinafter referred to as hydrogen gas turbine oil): First, the initial temperature of combined cycle generator sets using decarbonized fuels is increased to 1700℃, which is higher than that of H-class gas turbines (1426-1600℃), requiring oils to have higher thermal oxidation stability and a lower tendency to form sludge / varnish under high-temperature conditions. At the same time, the oils must be resistant to high-temperature oxidation and high-temperature corrosion of bearing metals. Second, the operation involves high-temperature and high-pressure steam, requiring lubricants to have excellent anti-emulsification properties.

[0003] Major international hydrogen gas turbine manufacturers (GE, SIEMENS, Mitsubishi Power, ANSALDO, etc.) have all conducted research and verification of hydrogen-rich fuel combustion technology and updated relevant gas turbine oil specifications to suit the characteristics of their own hydrogen gas turbines. China has a certain industrial foundation in hydrogen gas turbine technology, forming a gas turbine manufacturing industrial cluster with Harbin Electric Group, Shanghai Electric Group, and Dongfang Electric Group at its core, supplemented by high-tech innovative enterprises such as AVIC and ENN. Domestic gas turbine manufacturers mainly adopt a model of cooperation with international electrical companies or technology introduction for gas turbine production. For example, SAIC cooperates with SIEMENS and ANSALDO to produce F-class gas turbines; Dongfang Electric cooperates with Mitsubishi Power to produce F-class and J-class gas turbines; and Harbin Electric cooperates with GE to produce F-class and H-class gas turbines. Therefore, the performance requirements of gas turbine oils for gas turbines mainly refer to foreign standards or OEM (Original Equipment Manufacturer) oil specifications. Currently, there is no universal standard for hydrogen gas turbine oils both domestically and internationally. Lubricant companies develop turbine oil products compatible with hydrogen gas turbines based on gas turbine oil specifications. Hydrogen gas turbine oil is a cutting-edge product, and there is currently no literature on its research and performance improvement. The following existing technical literature records the research and development of gas turbine oils in this field:

[0004] Chinese invention patent application publication CN113493719A discloses a gas turbine lubricating oil composition, comprising 0.5-2% antioxidant, 0.1-0.5% ionic liquid, 0.03-0.06% rust inhibitor, 0.04-0.08% dispersant, 0.01-0.02% demulsifier, 0.01-0.02% antifoaming agent, 0.1-0.5% pour point depressant, and the balance being base oil. Its key feature is the use of a novel ionic liquid compounding system, which effectively protects metals and meets the operating conditions required for modern gas turbine equipment. However, the thiazole-based phosphate ionic liquid used in this design exhibits slightly poor friction-reducing properties under low loads, strong polarity, and a certain degree of surface corrosion to steel. Furthermore, its unique structure makes it difficult to purchase commercially. Additionally, this design does not address the control of sludge and varnish.

[0005] Chinese invention patent application publication CN111575094A provides a gas turbine oil composition containing 0.1-0.5 parts of antioxidant; 0.03-0.1 parts of metal passivator; 0.04-0.1 parts of rust inhibitor; 0.01-0.05 parts of demulsifier; 0.005-0.02 parts of antifoaming agent; and 98.4-99.6 parts of base oil. The antioxidant is selected from at least one of alkyl diphenylamine, alkylphenyl-α-naphthylamine, phenyl-α-naphthylamine, or dialkyl dithiocarbamate. This mainly solves the technical problem of insufficient high-temperature oxidation resistance in existing gas turbine oil compositions; however, this composition lacks extreme pressure anti-wear effect.

[0006] Chinese invention patent application publication CN105623794A relates to a gas turbine lubricating oil additive composition containing 10-40% antioxidant, 1-5% metal passivator, 2-6% rust inhibitor, 1-5% dispersant, 0.5-5% demulsifier, 0.5-5% antifoaming agent, and the balance being diluent. The composition is characterized by employing a compound system of amine antioxidants and phosphorus-imidazolium antioxidants. This composition is an additive package and does not have extreme pressure anti-wear effects. Summary of the Invention

[0007] This application discloses a hydrogen gas turbine oil composition that uses a specific antioxidant and extreme pressure anti-wear agent compound system to improve the oil's resistance to metal corrosion and extreme pressure anti-wear properties while significantly reducing sludge precipitation and varnish formation, thus extending the oil's service life. The base oil is mineral oil. This formulation effectively balances the adverse effects of extreme pressure agents on the oil's rust prevention and thermal oxidation stability. Various additives exhibit good compatibility and synergistic effects, resulting in excellent performance that meets the requirements for use in hydrogen gas turbine equipment. The oil quality meets the specifications of GB11120-2011L-TGSE gas / steam turbine oils and the specifications of Mitsubishi Electric Power's MS04-MA-CL003, satisfying the technical requirements for oils with extreme pressure properties for bearing operating environments above 250°C.

[0008] The product of this invention has better control over sludge and paint film, meeting the requirements of mainstream customers for oils with ultra-long service life and ultra-low sludge production.

[0009] One of the technical problems this invention aims to solve is to provide a hydrogen gas turbine oil composition. The composition incorporates rigorously screened antioxidants. The alkylphenyl-α-naphthylamine, with its alkyl chain, increases oil solubility, thereby reducing sludge and varnish formation. When combined with N-phenyl-α-naphthylamine in an appropriate ratio, it exhibits excellent performance in antioxidant durability, extended induction period, and inhibition of late-stage oil oxidation, while also demonstrating superior economic efficiency. Triphosphite, when synergistically combined with amine antioxidants in an appropriate ratio, improves the high-temperature corrosion resistance of the lubricating oil. This unique additive system effectively balances the adverse effects of extreme pressure agents on the oil's rust prevention and thermal oxidation stability, and the various additives exhibit good compatibility and synergistic effects.

[0010] To solve one of the above-mentioned technical problems, the present invention adopts the following technical solution: a hydrogen gas turbine oil composition, comprising the following components in weight percentage:

[0011]

[0012] The antioxidant is a mixture of alkylphenyl-α-naphthylamine, N-phenyl-α-naphthylamine and triphosphite;

[0013] The weight ratio of alkylphenyl-α-naphthylamine, N-phenyl-α-naphthylamine, and triphosphite is (4–12):(1–2):(4–8). Alkylphenyl-α-naphthylamine exhibits good heat resistance, and both phenyl-α-naphthylamine and peramine-type antioxidants show excellent results in rotating oxygen bomb tests. Triphosphite, as a secondary antioxidant, works synergistically with amine antioxidants to improve the high-temperature corrosion resistance of oils and extend their oxidation life. The amount of triphosphite added should be controlled within a certain range. If the amount added is too small, it will not achieve the desired antioxidant effect; if the amount added is too large, it may cause instability in the appearance of the oil or affect the performance of other additives.

[0014] As a preferred technical solution, the alkyl group of alkylphenyl-α-naphthylamine is a C6-C9 alkyl group.

[0015] As a preferred technical solution, the hydrogenated mineral oil is an HVI Group III or higher hydrogenated base oil with a kinematic viscosity at 40°C between 28.8% and 35.2% and a viscosity index between 120 and 140.

[0016] As a preferred technical solution, the extreme pressure anti-wear agent is a dialkyl dithiophosphate, triphenyl thiophosphate, tricresyl phosphate, a sulfur-phosphorus-nitrogen compound, or a mixture of the above components, such as IR353, T309, T399, or RC3775. Its addition amount is controlled between 0.02 wt% and 0.05 wt% to improve the oil film strength. If the addition amount is too small, the extreme pressure performance of the oil cannot meet the requirements. Once a certain amount is reached, further increasing the addition amount will not significantly improve the extreme pressure performance of the oil and will negatively affect other properties.

[0017] As a preferred technical solution, the demulsifier is an amine and epoxide condensate, an oil-soluble polyether, a polyoxypropylene derivative, or a mixture of the above components, such as T-1001, PE6100, X15861, LZ5957, DL32.

[0018] The degree of polymerization of oil-soluble polyethers and polyoxypropylene derivatives is not specifically limited.

[0019] As a preferred technical solution, the amount of demulsifier added is controlled at 0.01wt% to 0.02%. If the amount added is too small, it will not have an anti-emulsification effect, and if the amount added is too large, it will have the opposite effect on the anti-emulsification effect of the oil.

[0020] As a preferred technical solution, the metal deactivator is N,N'-dialkylaminomethylenetriazole, N,N-di(2-ethylhexyl)-4-methyl-1H-benzotriazole-1-methylamine, alkylthiadiazole, or a mixture of the above components, such as T551, Cuvan484, and T561, with the addition amount controlled at 0.02wt% to 0.05wt%. Using the above-mentioned metal deactivator can effectively inhibit the catalytic activity of metals, reduce the tendency of oil to corrode metals at high temperatures, and also enhance the inhibition effect on copper corrosion, increasing the anti-wear and anti-rust capabilities of the oil.

[0021] As a preferred technical solution, the rust inhibitor is a compound mixture of dodecenyl succinic acid and a succinic acid half-ester derivative; the weight ratio of dodecenyl succinic acid to the succinic acid half-ester derivative is (6-8):(1-3); or, the rust inhibitor is a compound mixture of dodecenyl succinic acid and maleic anhydride diisobutyl ester; the weight ratio of dodecenyl succinic acid to maleic anhydride diisobutyl ester is (6-8):(1-3). The amount of rust inhibitor added is controlled between 0.04wt% and 0.06wt%. If the amount added is too small, it will not achieve the desired rust-preventing effect; if the amount added is too large, it may affect the extreme pressure anti-wear performance or other properties of the oil.

[0022] As a preferred technical solution, the antifoaming agent is selected from at least one of polymethyl silicone oil, acrylate-ether copolymer, and modified silicone antifoaming agent, such as T901, T921, FOAM BAN 155, and FOAM BAN 130B. Its addition amount is controlled between 0.001wt% and 0.05wt%. If the addition amount is too small, it will not achieve the desired antifoaming effect; if the addition amount is too large, it may affect the appearance of the oil.

[0023] The degree of polymerization of polymethyl silicone oil and acrylate-ether copolymers is not limited, nor is the ratio of structural units in acrylate-ether copolymers limited.

[0024] The second technical problem to be solved by the present invention is a method for preparing the composition corresponding to the solution of the first technical problem.

[0025] To achieve the second objective of the invention, the technical solution adopted by the present invention is as follows: the lubricating oil composition is used for the lubrication of sliding bearings, reduction gears, speed governors, and hydraulic control systems in hydrogen gas turbines and linked units. The hydrogen gas turbine turbine oil mainly functions as lubricant, coolant, and speed regulator.

[0026] The preparation method of the hydrogen gas turbine oil composition of the present invention includes the following steps:

[0027] First, the hydrogenated mineral oil and antioxidant are heated and mixed (I). Then, extreme pressure anti-wear agent, demulsifier, metal deactivator, rust inhibitor and antifoaming agent are added and heated and mixed (II) to obtain the hydrogen gas turbine oil composition.

[0028] The conditions for heating and mixing I include 80–85°C and 1–3 hours; the heating and mixing time for I is 1 hour, 2 hours, 3 hours, or any value between any two of the above.

[0029] The conditions for heating and mixing II include 40–50°C and 1–5 hours. The temperature of heating and mixing II is 40°C, 45°C, 50°C, or any value between any two of the above; the time of heating and mixing II is 1 hour, 2 hours, 3 hours, 4 hours, 5 hours, or any value between any two of the above.

[0030] As a specific embodiment, the preparation method of the hydrogen gas turbine oil composition of the present invention includes the following steps:

[0031] (1) Add base oil and antioxidant in proportion, heat to 80-85℃ and stir to completely dissolve the additives, maintain for 1-3 hours, then reduce the temperature to 40-50℃.

[0032] (2) Add other ingredients except antifoaming agent, stir for 2 to 3 hours until the mixture is completely dissolved and transparent.

[0033] (3) Add antifoaming agent and stir for 1 to 2 hours until the antifoaming agent is completely dispersed in the oil.

[0034] The third technical problem to be solved by the present invention is the use of the composition corresponding to the solution of the first technical problem.

[0035] Through extensive experimental research, the researchers of this invention selected suitable base oils and compatible additives, and explored the types and proportions of various additives to obtain a hydrogen gas turbine oil composition. This composition possesses excellent resistance to metal corrosion and extreme pressure anti-wear properties, good sludge and varnish control performance, and a further extended service life. It is suitable for the lubrication of sliding bearings, reduction gears, governors, and hydraulic control systems in hydrogen gas turbines and linked units. This hydrogen gas turbine oil composition exhibits excellent comprehensive performance, metal corrosion resistance (ASTM D4636, 175℃ 172h), viscosity increase of less than 2% after testing, acid value increase of less than 0.1 mgKOH / g, and metal sheet weight loss before and after testing: cadmium sheet weight loss less than ±0.1 mg / cm³. 2 The weight loss of the aluminum sheet is less than ±0.1 mg / cm³. 2 The weight loss of the copper sheet is less than ±0.1 mg / cm³. 2 The weight loss of magnesium sheets is less than ±0.1 mg / cm², and the weight loss of steel sheets is less than ±0.1 mg / cm². 2 Extreme pressure anti-wear performance (NB / SH / T 0306) FZG gear machine test / failure level not less than 11, in the Dry-Tost test at 120℃, the oxidation life with a remaining rotational oxygen bomb rate of 50% is at least 1200 hours, and the sludge generation is less than 40mg / kg.

[0036] This invention relates to a hydrogen gas turbine oil composition that utilizes an additive compounding system to improve the oil's resistance to metal corrosion and extreme pressure anti-wear properties while significantly reducing sludge precipitation and varnish formation, thus extending the oil's service life. The base oil is mineral oil. This formulation effectively balances the adverse effects of extreme pressure agents on the oil's rust prevention and thermal oxidation stability. Various additives exhibit good compatibility and synergistic effects, resulting in excellent performance that meets the requirements for use in hydrogen gas turbine equipment. Detailed Implementation

[0037] The present invention will be further illustrated below through examples.

[0038] All of the above-mentioned raw materials used in this invention can be prepared in-house or purchased commercially; this invention does not impose any particular limitations on them.

[0039] To make the technical problems, technical solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely for illustrating this patent and do not limit the scope of protection of this invention in any way. Unless otherwise defined, the technical terms used in the following embodiments have the same meaning as commonly understood by those skilled in the art. Unless otherwise specified, the reagents used in the following embodiments are conventional biochemical reagents; the raw materials, instruments, and equipment used in the following embodiments can all be obtained through commercial purchase or by existing methods; the reagent dosages, unless otherwise specified, are the dosages used in conventional experimental operations; and the experimental methods, unless otherwise specified, are conventional methods.

[0040] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following detailed description of the specific implementation, features and effects of the hydrogen gas turbine oil composition proposed according to the present invention, in conjunction with preferred embodiments, is provided but is not intended to limit the scope of the present invention.

[0041] Sources of raw materials in the embodiments of the present invention:

[0042] Dialkyl dithiophosphate IR353 (BASF AG)

[0043] Triphenyl thiophosphate T309 (Shenyang Weihua Chemical Co., Ltd.)

[0044] Trimethylbenzene phosphate T399 (Shandong Ruixing Flame Retardant Technology Co., Ltd.)

[0045] Sulfur, phosphorus and nitrogen compounds RC3775 (Lanxess Chemicals (China) Co., Ltd.)

[0046] Amine and epoxide condensate T-1001 (Wuxi Southern Petroleum Additives Co., Ltd.)

[0047] Polyoxypropylene derivative PE6100 (Yangzi Petrochemical-BASF Co., Ltd.)

[0048] Polyoxypropylene derivative LZ5957 (Lubrizol Ltd.)

[0049] Polyoxypropylene derivative DL32 (Jinzhou Xinxing Petroleum Additives Co., Ltd.)

[0050] C6-C9 alkylphenyl-α-naphthylamine (Lanxess Chemicals (China) Co., Ltd.)

[0051] N-Phenylon-α-Naphthylamine (Changzhou Huadaming Co., Ltd.)

[0052] Tris(phosphite) 626 (Tianjin Lianlong Co., Ltd.)

[0053] N,N'-Dialkylaminomethylenetriazole T551 (Tianjin Yuning Chemical Co., Ltd.)

[0054] Thiadiazole derivative Cuvan484 (Yantai Hengnuo New Materials Co., Ltd.)

[0055] Alkylthiadiazole T561 (Changzhou Huadaming Co., Ltd.)

[0056] Dodecenylsuccinic acid T746 (Dalian Huapu Chemical Co., Ltd.)

[0057] Succinate half-ester derivative RN4800 (Shanghai Yucheng Chemical Co., Ltd.)

[0058] Maleic anhydride diisobutyl ester K1031 (King Ltd., USA)

[0059] Polymethyl silicone oil T901 (Sinopec Lubricating Oil Co., Ltd. Chongqing Branch)

[0060] FOAM BAN 155, an acrylate-ether copolymer (Mengqingxin Additives Trading (Shanghai) Co., Ltd.)

[0061] Polyoxypropylene modified silicone antifoaming agent FOAM BAN 130B (Mengqingxin Additives Trading (Shanghai) Co., Ltd.)

[0062] To evaluate the performance of this composition for hydrogen gas turbine lubrication, evaluation tests were conducted using the technical requirements for oils with a viscosity grade of 32 in GB11120-2011 L-TGSE gas / steam turbine oils. The results showed that the oil meets the requirements for metal corrosion resistance, extreme pressure anti-wear properties, and basic physicochemical properties of turbine oils. To reduce sludge precipitation and varnish formation and extend the service life of the oil, the standard test method (ASTM D7873-2022a) for determining the oxidation stability and insoluble matter formation of antioxidant turbine oils under anhydrous conditions at 120°C, as specified in Mitsubishi Electric Power's MS04-MA-CL003 specification, and the internationally accepted standard test method (ASTM D7843-2021) for determining the insoluble chromophores in in-service turbine oils, were used for evaluation.

[0063] Example 1

[0064] According to the weight proportions in Table 1, weigh the required amount of antioxidant and add it to the hydrogenated mineral oil. Heat the mixture to 80°C and stir for 1 hour, then lower the temperature to 45°C. Weigh the required amounts of extreme pressure anti-wear agent, demulsifier, metal deactivator, and rust inhibitor and add them to the mineral base oil containing the antioxidant. Stir until the mixture is completely dissolved and transparent. Then weigh the required amount of antifoaming agent and stir for 30 minutes to obtain the hydrogen gas turbine oil composition. The specific components of the composition are shown in Table 1.

[0065] Example 2

[0066] According to the weight proportions in Table 1, weigh the required amount of antioxidant and add it to the hydrogenated mineral oil. Heat the mixture to 80°C and stir for 1 hour, then lower the temperature to 45°C. Weigh the required amounts of extreme pressure anti-wear agent, demulsifier, metal deactivator, and rust inhibitor and add them to the mineral base oil containing the antioxidant. Stir until the mixture is completely dissolved and transparent. Then weigh the required amount of antifoaming agent and stir for 30 minutes to obtain the hydrogen gas turbine oil composition. The specific components of the composition are shown in Table 1.

[0067] Example 3

[0068] According to the weight proportions in Table 1, weigh the required amount of antioxidant and add it to the hydrogenated mineral oil. Heat the mixture to 80°C and stir for 1 hour, then lower the temperature to 45°C. Weigh the required amounts of extreme pressure anti-wear agent, demulsifier, metal deactivator, and rust inhibitor and add them to the mineral base oil containing the antioxidant. Stir until the mixture is completely dissolved and transparent. Then weigh the required amount of antifoaming agent and stir for 30 minutes to obtain the hydrogen gas turbine oil composition. The specific components of the composition are shown in Table 1.

[0069] Example 4

[0070] According to the weight proportions in Table 1, weigh the required amount of antioxidant and add it to the hydrogenated mineral oil. Heat the mixture to 80°C and stir for 1 hour, then lower the temperature to 45°C. Weigh the required amounts of extreme pressure anti-wear agent, demulsifier, metal deactivator, and rust inhibitor and add them to the mineral base oil containing the antioxidant. Stir until the mixture is completely dissolved and transparent. Then weigh the required amount of antifoaming agent and stir for 30 minutes to obtain the hydrogen gas turbine oil composition. The specific components of the composition are shown in Table 1.

[0071] Comparative Examples 1-2

[0072] Comparative Example 1 uses Mobil 32 gas turbine oil, and Comparative Example 2 uses Shell 32 gas turbine oil. Tests were conducted according to various test methods, and the results are compared in Table 2.

[0073] Table 1

[0074]

[0075]

[0076] Table 2

[0077]

[0078]

[0079] As shown in the test results of the examples in the table, [Examples 1-5] exhibit excellent high-temperature oxidation stability and copper strip corrosion resistance, indicating that the product has excellent resistance to metal corrosion and can control the impact of oil oxidation on bearing metal at high temperatures. [Examples 1-5] The FZG gearbox test reached level 11 or above. Compared with Comparative Example 1, the product has excellent extreme pressure anti-wear performance and can meet the requirements of hydrogen gas turbine gearbox for extreme pressure performance of oil. [Examples 1-5] The rotating oxygen bomb value and Dry-TOST test both showed excellent performance. In the Dry-TOST high-temperature oxidation test, when the oxygen bomb residue reached 50%, the simulated oxidation life was over 1100h, and the sludge formation was below 50mg / kg. After 300h bearing adaptability bench test (FED_STD-791D(3425.2)), the oil varnish tendency index (MPC) remained at a low level, indicating that the product has excellent oxidation stability and good sludge and varnish control performance, which can effectively extend the service life during the use of turbine oil.

[0080] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A hydrogen-powered gas turbine oil composition, comprising, by weight, the following components: Hydrogenated mineral oil, 99.120~99.459 parts; Extreme pressure anti-wear agent 0.02-0.05 parts; Demulsifier 0.01–0.02 parts; Antioxidant 0.45–0.65 parts; Metal deactivating agent 0.02–0.05 parts; Rust inhibitor 0.04–0.06 parts; Antifoaming agent 0.001-0.05 parts; The antioxidant is a mixture of alkylphenyl-α-naphthylamine, N-phenyl-α-naphthylamine and triphosphite; The weight ratio of alkylphenyl-α-naphthylamine, N-phenyl-α-naphthylamine and triphosphite is (4~12):(1~2):(4~8); The extreme pressure anti-wear agent is selected from at least one of dialkyl dithiophosphate, triphenyl thiophosphate, tricresyl phosphate, or sulfur-phosphorus-nitrogen compounds. The rust inhibitor is a compound mixture of dodecenyl succinic acid and succinic acid half-ester derivative, or the rust inhibitor is a compound mixture of dodecenyl succinic acid and maleic anhydride diisobutyl ester.

2. The hydrogen gas turbine oil composition according to claim 1, characterized in that, The demulsifier is an amine-epoxide condensate, an oil-soluble polyether, a polyoxypropylene derivative, or a mixture of the above components.

3. The hydrogen gas turbine oil composition according to claim 1, characterized in that, The metal deactivator is selected from at least one of N,N'-dialkylaminomethylenetriazole, N,N-di(2-ethylhexyl)-4-methyl-1H-benzotriazole-1-methylamine, and alkylthiadiazole.

4. The hydrogen gas turbine oil composition according to claim 1, characterized in that, The weight ratio of dodecenyl succinic acid to succinic acid half-ester derivative in the compound mixture of dodecenyl succinic acid and succinic acid half-ester derivative is (6~8):(1~3). Alternatively, the weight ratio of dodecenyl succinic acid to maleic anhydride diisobutyl ester in the compound mixture is (6~8):(1~3).

5. The hydrogen gas turbine oil composition according to claim 1, characterized in that, The antifoaming agent is selected from at least one of acrylate-ether copolymer, polyoxypropylene modified silicone antifoaming agent, and polymethyl silicone oil.

6. The hydrogen gas turbine oil composition according to claim 1, characterized in that, The hydrogenated mineral oil is an HVI Group III hydrogenated base oil, and the kinematic viscosity of the hydrogenated base oil at 40°C is 28.8~35.2 mm. 2 The viscosity index is between 120 and 140, with a range of / s.

7. A method for preparing the hydrogen gas turbine oil composition according to any one of claims 1-6, comprising the steps of: First, the hydrogenated mineral oil and antioxidant are heated and mixed (I). Then, extreme pressure anti-wear agent, demulsifier, metal deactivator, rust inhibitor and antifoaming agent are added and heated and mixed (II) to obtain the hydrogen gas turbine oil composition. The conditions for heating and mixing I include 80~85℃ for 1~3 hours; The conditions for heating and mixing II include 40–50°C for 1–5 hours.

8. A method for preparing the hydrogen gas turbine oil composition according to any one of claims 1-6, comprising the steps of: (1) Mix the hydrogenated mineral oil and antioxidant, heat to 80-85°C, maintain for 1-3 hours, and then lower the temperature to 40-50°C; (2) Add extreme pressure anti-wear agent, demulsifier, metal deactivator and rust inhibitor, and stir at 40-50℃ for 2-3 hours; (3) Add antifoaming agent and stir at 40-50℃ for 1-2 hours.

9. The application of the hydrogen gas turbine oil composition according to any one of claims 1-6, characterized in that, Used for the lubrication of hydrogen gas turbines or for the lubrication of sliding bearings, reduction gears, speed governors or hydraulic control systems of hydrogen gas turbine linked units.

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