A kind of rust-proof lubricating oil and its preparation method and application

Abstract

The present invention provides a rust-proof lubricating oil and a preparation method and application thereof, belonging to the field of rust-proof lubrication technology. The rust-proof lubricating oil provided by the present invention does not contain barium element, and comprises the following components by mass percentage: base oil 79.0-93.7%; antioxidant 0.2-1.0%; metal passivator 0.1-1.0%; rust inhibitor 5.0-15.0%; film former 0.5-2.0%; penetrant 0.5-2.0%; the rust inhibitor is tri-dodecyl methyl quaternary ammonium salt docusate ionic liquid, dioctyl phosphate octadecylamine salt and low-base long-chain linear alkylbenzene calcium sulfonate, and the number of alkyl carbon atoms of the low-base long-chain linear alkylbenzene calcium sulfonate is 20-24, and the base number is 20-35. The rust-proof lubricating oil provided by the present invention does not contain barium element, is environmentally friendly and harmless, and has excellent anti-corrosion performance while also having good lubrication performance.

Description

Technical Field

[0001] The invention relates to the technical field of rust-proof lubrication, and in particular to an anti-rust lubricating oil and a preparation method and application thereof. Background Art

[0002] Metal products are very susceptible to corrosion due to chemical, electrochemical or physical dissolution reactions with the surrounding media, which can greatly damage the performance and commercial value of metal products and related mechanical equipment, and may even cause major failures and render the equipment scrapped.

[0003] Using rust-proof oil to protect metal materials is one of the most commonly used protection methods at present. Rust-proof oil is mainly composed of base oil, antioxidant and rust-proof additive, among which rust-proof additive is the core component. Commonly used rust-proof additives include barium petroleum sulfonate, sodium petroleum sulfonate, barium dinonylnaphthalene sulfonate, calcium petroleum sulfonate, neutral calcium dinonylnaphthalene sulfonate, dodecenyl succinic acid, etc. Since barium petroleum sulfonate has excellent rust-proof performance, more than 90% of rust-proof oil products use barium petroleum sulfonate as the main rust-proof agent. However, rust-proof oil containing barium element has potential harm to the environment and human body. With the increasingly stringent environmental protection regulations, many countries have clearly put forward the requirement that rust-proof oil should not contain barium. In addition, in addition to having excellent corrosion resistance, rust-proof oil also needs to have good lubrication performance to reduce the vibration and noise caused by the operation of metal parts such as bearings. In order to improve the lubrication performance of rust-proof oil, extreme pressure anti-wear agents such as zinc dialkyl dithiophosphate (ZDDP), phosphate esters or phosphate amine salts can be added. However, rust inhibitors and extreme pressure anti-wear agents are mostly polar compounds, and they work on metal surfaces through physical or chemical adsorption. Therefore, there is competitive adsorption between the two, and it is difficult to achieve a balance between anti-corrosion performance and lubrication performance. Summary of the invention

[0004] The object of the present invention is to provide an anti-rust lubricating oil and a preparation method and application thereof. The anti-rust lubricating oil provided by the present invention does not contain barium element, is environmentally friendly and harmless, and has excellent anti-corrosion performance and good lubrication performance.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0006] The invention provides a rust-proof lubricating oil, which does not contain barium element and comprises the following components by weight percentage: 79.0-93.7% of base oil; 0.2-1.0% of antioxidant; 0.1-1.0% of metal passivator; 5.0-15.0% of rust-proof agent; 0.5-2.0% of film-forming agent; 0.5-2.0% of penetrant;

[0007] The rust inhibitor is tri-dodecyl methyl quaternary ammonium salt docusate ionic liquid, dioctyl phosphate octadecylamine salt and low-base long-chain linear alkylbenzene sulfonate calcium. The low-base long-chain linear alkylbenzene sulfonate calcium has 20-24 alkyl carbon atoms and a base value of 20-35.

[0008] Preferably, the mass ratio of the tri-dodecylmethyl quaternary ammonium salt docusate ionic liquid, dioctyl phosphate octadecylamine salt and low base value long-chain linear alkylbenzene sulfonate calcium is 1.0-3.0:1.0-3.0:3.0-9.0.

[0009] Preferably, the base oil is industrial white oil, and the kinematic viscosity of the industrial white oil at 40°C is 2 to 45 mm 2 / s.

[0010] Preferably, the industrial white oil includes one or more of No. 3 industrial white oil, No. 5 industrial white oil, No. 7 industrial white oil, No. 10 industrial white oil, No. 15 industrial white oil and No. 32 industrial white oil.

[0011] Preferably, the antioxidant is 2,6-di-tert-butyl mixed phenol, 2,6-di-tert-butylphenol or alkyl diphenylamine.

[0012] Preferably, the metal deactivator is a benzotriazole derivative, an imidazoline derivative or a thiadiazole derivative.

[0013] Preferably, the film former is lanolin magnesium soap, lanolin or oxidized paraffin.

[0014] Preferably, the penetrant is diethylene glycol monobutyl ether.

[0015] The present invention provides a method for preparing the rust-proof lubricating oil described in the above technical solution, comprising the following steps:

[0016] The base oil, antioxidant, metal passivator, rust inhibitor, film former and penetrant are mixed to obtain rust-proof lubricating oil.

[0017] The present invention provides the use of the anti-rust lubricating oil described in the above technical solution or the anti-rust lubricating oil prepared by the preparation method described in the above technical solution in anti-rust lubrication of the surface of metal parts.

[0018] The invention provides a rust-proof lubricating oil, which does not contain barium element and comprises the following components by mass percentage: 79.0-93.7% of base oil; 0.2-1.0% of antioxidant; 0.1-1.0% of metal passivator; 5.0-15.0% of rust-proof agent; 0.5-2.0% of film-forming agent; and 0.5-2.0% of penetrant. The rust-proof agent is tri-dodecyl methyl quaternary ammonium salt docusate ionic liquid, dioctyl phosphate octadecylamine salt and low-base long-chain linear alkylbenzene calcium sulfonate, wherein the number of alkyl carbon atoms of the low-base long-chain linear alkylbenzene calcium sulfonate is 20-24 and the base value is 20-35. The rust-proof lubricating oil provided by the present invention does not contain barium element and is environmentally friendly and harmless; the present invention adopts tri-dodecyl methyl quaternary ammonium salt docusate ionic liquid, dioctyl phosphate octadecylamine salt and low-base long-chain linear alkylbenzene sulfonate calcium as rust inhibitors, which have both corrosion resistance and friction reduction and wear resistance, and have good positive synergistic effects with metal passivators, which can effectively improve the rust and corrosion resistance of the rust-proof lubricating oil; at the same time, because the tri-dodecyl methyl quaternary ammonium salt docusate ionic liquid and dioctyl phosphate octadecylamine salt have excellent tribological properties, the lubricity of the rust-proof lubricating oil can be improved, and the competitive adsorption problem between traditional rust inhibitors and extreme pressure anti-wear agents is solved. The results of the embodiment show that the rust-proof lubricating oil provided by the present invention has excellent corrosion resistance under salt spray and wet heat conditions, and has good lubrication performance, which can meet the long-term rust prevention and lubrication requirements of metal parts in high heat, high humidity and high salt spray harsh environments. DETAILED DESCRIPTION

[0019] The invention provides a rust-proof lubricating oil, which does not contain barium element and comprises the following components by weight percentage: 79.0-93.7% of base oil; 0.2-1.0% of antioxidant; 0.1-1.0% of metal passivator; 5.0-15.0% of rust-proof agent; 0.5-2.0% of film-forming agent; 0.5-2.0% of penetrant;

[0020] The rust inhibitor is tri-dodecyl methyl quaternary ammonium salt docusate ionic liquid, dioctyl phosphate octadecylamine salt and low-base long-chain linear alkylbenzene sulfonate calcium. The low-base long-chain linear alkylbenzene sulfonate calcium has 20-24 alkyl carbon atoms and a base value of 20-35.

[0021] In the present invention, unless otherwise specified, the raw materials used are commercially available products well known to those skilled in the art or are prepared by methods well known to those skilled in the art.

[0022] In terms of mass percentage, the rust-proof lubricating oil in the present invention comprises 79.0-93.7% of the base oil, preferably 81.0-90.0%, and more preferably 83.0-85.0%. In the present invention, the base oil is preferably industrial white oil, and the kinematic viscosity of the industrial white oil at 40°C is preferably 2-45 mm 2 / s, more preferably 5 to 35 mm 2 / s, more preferably 10 to 33 mm 2 / s. In the present invention, the industrial white oil preferably includes one or more of No. 3 industrial white oil, No. 5 industrial white oil, No. 7 industrial white oil, No. 10 industrial white oil, No. 15 industrial white oil and No. 32 industrial white oil, and more preferably is a mixture of No. 10 industrial white oil and No. 32 industrial white oil; when the industrial white oil is a mixture of No. 10 industrial white oil and No. 32 industrial white oil, the mass ratio of No. 10 industrial white oil to No. 32 industrial white oil is preferably 27:52-66.7, and more preferably 27:55-58. In an embodiment of the present invention, the kinematic viscosity of No. 10 industrial white oil at 40°C is preferably 10.35 mm 2 / s, the kinematic viscosity of the No. 32 industrial white oil at 40°C is preferably 32.41 mm 2 / s; the No. 10 industrial white oil and No. 32 industrial white oil are specifically purchased from Hebei Feitian Petrochemical Group Co., Ltd. The present invention preferably uses the above-mentioned base oil, which has a low aromatic content, does not produce gums during use, and has good solubility for various other additives.

[0023] In terms of mass percentage, the rust-proof lubricating oil in the present invention includes 0.2-1.0% antioxidant, preferably 0.3-0.6%, and more preferably 0.4-0.5%. In the present invention, the antioxidant is preferably 2,6-di-tert-butyl mixed phenol, 2,6-di-tert-butyl phenol or alkyl diphenylamine, and more preferably 2,6-di-tert-butyl mixed phenol. In the present invention, the 2,6-di-tert-butyl mixed phenol is preferably T502 of Hubei Shixing Chemical Co., Ltd. The present invention preferably uses the above-mentioned types of antioxidants, which is beneficial to improving the antioxidant properties of the rust-proof lubricating oil.

[0024] In terms of mass percentage, the rust-proof lubricating oil in the present invention includes 0.1-1.0% of metal passivator, preferably 0.3-0.5%. In the present invention, the metal passivator is preferably a benzotriazole derivative, an imidazoline derivative or a thiadiazole derivative, more preferably a benzotriazole derivative; the benzotriazole derivative is preferably N,N-dibutylaminomethylmethylenebenzotriazole. In the present invention, the N,N-dibutylaminomethylmethylenebenzotriazole is preferably T551 of Changsha Wangcheng Petrochemical Co., Ltd. The present invention preferably uses the above-mentioned types of metal passivators, which is beneficial to improving the corrosion resistance of the rust-proof lubricating oil on non-ferrous metal parts.

[0025] In terms of mass percentage, the rust-proof lubricating oil in the present invention comprises 5.0-15.0% of rust inhibitor, preferably 5.5-13.0%, and more preferably 5.5-7.0%. In the present invention, the rust inhibitor is tri-dodecyl methyl quaternary ammonium salt docusate ionic liquid, dioctyl phosphate octadecylamine salt and low-base long-chain linear alkylbenzene sulfonate calcium, the number of alkyl carbon atoms of the alkylbenzene sulfonate calcium is 20-24, and the base number is 20-35. In the present invention, the mass ratio of tri-dodecyl methyl quaternary ammonium salt docusate ionic liquid, dioctyl phosphate octadecylamine salt and low-base long-chain linear alkylbenzene sulfonate calcium is 1.0-3.0:1.0-3.0:3.0-9.0, preferably 1.0-2.5:1.0-2.5:3.0-6.0. In the present invention, the dioctyl phosphate octadecylamine salt is preferably ZR85 from Taiyuan Anrun Petroleum Lubricant Additives Co., Ltd.; the low base value long-chain linear alkylbenzene sulfonate calcium is preferably RF1104 from Xinxiang Ruifeng New Materials Co., Ltd., the number of alkyl carbon atoms is 20 to 24, and the base value is 20 to 35. The present invention does not specifically limit the source of the tri-dodecylmethyl quaternary ammonium salt docusate ionic liquid, and it can be prepared by a method well known to those skilled in the art (Fan Mingjin, Yang Desuo, Wang Xiaoling, et al. DOSS-Based QAILs: As Both Neat Lubricants and Lubricant Additives with Excellent Tribological Properties and Good Detergency. Industrial & Engineering Chemistry Research, 2014, 53 (46): 17952-17960). The present invention adopts tri-dodecyl methyl quaternary ammonium salt docusate ionic liquid, dioctyl phosphate octadecylamine salt and low-base long-chain linear alkylbenzene sulfonate calcium as rust inhibitors, and the components have good positive synergistic effects with each other, can wet the surface of metal parts, form a complete and uniform protective coating, improve the rust prevention ability of rust-proof lubricating oil, and have good affinity for metal parts, which is conducive to discharging water on the surface of metal parts, and further improves the rust prevention ability of rust-proof lubricating oil; at the same time, because tri-dodecyl methyl quaternary ammonium salt docusate ionic liquid and dioctyl phosphate octadecylamine salt have excellent tribological properties, the lubricity of rust-proof lubricating oil can be improved, and the competitive adsorption problem between traditional rust inhibitors and extreme pressure antiwear agents is solved. Compared with traditional rust inhibitors such as petroleum sulfonates or dinonylnaphthalene sulfonates, the rust inhibitor formed by compounding the above compounds in the present invention can greatly improve the anti-corrosion performance of rust-proof lubricating oil, and has excellent lubricity.

[0026] In terms of mass percentage, the rust-proof lubricating oil in the present invention includes 0.5-2.0% of a film-forming agent, preferably 0.7-1.5%, and more preferably 0.9-1.2%. In the present invention, the film-forming agent is preferably lanolin magnesium soap, lanolin or oxidized paraffin, and more preferably lanolin magnesium soap. In the present invention, the lanolin magnesium soap is preferably magnesium soap from Suzhou Fanrong Biotechnology Co., Ltd. The present invention preferably uses the above-mentioned film-forming agent, which has good oil solubility, film-forming property, acid and alkali resistance and other properties, and can make the rust-proof lubricating oil form a protective coating on the surface of the metal parts, hinder the corrosion behavior of the corrosive medium on the metal parts, and play a role in enhancing the rust-proof performance.

[0027] In terms of mass percentage, the rust-proof lubricating oil in the present invention includes 0.5-2.0% of penetrant, preferably 0.7-1.5%, and more preferably 0.9-1.2%. In the present invention, the penetrant is preferably diethylene glycol monobutyl ether. In the present invention, the diethylene glycol monobutyl ether is preferably Butyl Carbitol (TM) of Dow. The present invention preferably uses the above-mentioned penetrant, which has good penetrating effect, and can make the rust-proof lubricating oil penetrate and diffuse to the special structural positions of some tiny channels of metal parts that are difficult to apply, and form a protective coating on the surface to achieve comprehensive rust protection.

[0028] The present invention provides a method for preparing the rust-proof lubricating oil described in the above technical solution, comprising the following steps:

[0029] The base oil, antioxidant, metal passivator, rust inhibitor, film former and penetrant are mixed to obtain rust-proof lubricating oil.

[0030] In the present invention, an antioxidant, a metal passivator, a rust inhibitor, a film former and a penetrant are preferably added to the base oil at 60 to 80° C. in sequence, and stirred at 60 to 80° C. for 3 to 5 hours until the obtained mixture is uniform and transparent, and then cooled to room temperature to obtain the rust-proof lubricating oil. In an embodiment of the present invention, the mixing is preferably carried out in a stainless steel blending kettle with a stirrer.

[0031] The present invention provides the use of the anti-rust lubricating oil described in the above technical solution or the anti-rust lubricating oil prepared by the preparation method described in the above technical solution in the anti-rust lubrication of the surface of metal parts. The present invention has no special limitation on the material of the metal parts, which may specifically be iron, manganese, chromium or copper, or an alloy formed by at least two metals among iron, manganese, chromium and copper, or steel. The present invention has no special limitation on the type of the metal parts, which may specifically be bearings, gears or steel sheets. The present invention has no special limitation on the method of using the anti-rust lubricating oil, and the method familiar to those skilled in the art can be used. The present invention preferably coats the anti-rust lubricating oil on the surface of the metal parts to form a protective coating on the surface of the metal parts. In the present invention, the coating preferably includes spraying, dipping or brushing, which can be selected according to actual needs; specifically, the spraying is to spray the anti-rust lubricating oil on the surface of the metal part by high-pressure jet, and then dry to form a protective coating. This method is suitable for large-area anti-rust lubrication of the surface of metal parts; the dipping is to immerse the metal part in the anti-rust lubricating oil, form a wet film on the surface of the metal part, take it out to drain or dry to form a protective layer. This method is suitable for large quantities of metal parts. The brushing is to apply the anti-rust lubricating oil to the surface of the metal part with a brush, and then dry to form a protective coating. This method is suitable for all metal products that need to be rust-proof. The present invention does not specifically limit the amount of the anti-rust lubricating oil, and the surface of the metal product can be completely coated according to actual needs.

[0032] The technical solutions in the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. 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.

[0033] The sources of the raw materials involved in the following examples and comparative examples include:

[0034] No. 10 industrial white oil was purchased from Hebei Feitian Petrochemical Group Co., Ltd., with a kinematic viscosity of 10.35 mm at 40 °C. 2 / s;

[0035] No. 32 industrial white oil was purchased from Hebei Feitian Petrochemical Group Co., Ltd., with a kinematic viscosity of 32.41 mm at 40 °C. 2 / s;

[0036] 2,6-di-tert-butyl mixed phenol was purchased from Hubei Shixing Chemical Co., Ltd., model number T502;

[0037] N,N-dibutylaminomethylmethylenebenzotriazole was purchased from Changsha Wangcheng Petrochemical Co., Ltd., model number T551;

[0038] Dioctyl phosphate octadecylamine salt was purchased from Taiyuan Anrun Petroleum Lubricant Additive Co., Ltd., model number ZR85;

[0039] Low base number long chain linear alkylbenzene sulfonate calcium was purchased from Xinxiang Ruifeng New Materials Co., Ltd., model RF1104, the number of alkyl carbon atoms is 20-24, and the base number is 20-35;

[0040] Lanolin magnesium soap was purchased from Suzhou Fanrong Biotechnology Co., Ltd.;

[0041] Diethylene glycol monobutyl ether was purchased from Dow, model number: Butyl Carbitol(TM);

[0042] Tridodecylmethyl quaternary ammonium docusate ionic liquid was prepared according to the literature method (Fan Mingjin, Yang Desuo, Wang Xiaoling, et al. DOSS-Based QAILs: As Both Neat Lubricants and Lubricant Additives with Excellent Tribological Properties and Good Detergency. Industrial & Engineering Chemistry Research, 2014, 53(46): 17952-17960).

[0043] The anti-rust lubricating oils in the following examples and comparative examples were all prepared in a stainless steel blending kettle with a stirrer.

[0044] Example 1

[0045] Add 52.0 g of No. 32 industrial white oil to 27.0 g of No. 10 industrial white oil, heat to 70±5°C and stir, then add 1.0 g of 2,6-di-tert-butyl mixed phenol, 1.0 g of N,N-dibutylaminomethylmethylenebenzotriazole, 3.0 g of tri-dodecylmethyl quaternary ammonium salt docusate ionic liquid, 3.0 g of dioctyl phosphate octadecylamine salt, 9.0 g of low base value long chain linear alkylbenzene sulfonate calcium, 2.0 g of lanolin magnesium soap and 2.0 g of diethylene glycol monobutyl ether in sequence, stir at 70±5°C for 3 hours, the resulting mixture is uniform and transparent, and cool to room temperature (25°C) to obtain anti-rust lubricating oil.

[0046] Example 2

[0047] Add 58.0 g of No. 32 industrial white oil to 27.0 g of No. 10 industrial white oil, heat to 70±5°C and stir, then add 0.5 g of 2,6-di-tert-butyl mixed phenol, 0.5 g of N,N-dibutylaminomethylmethylenebenzotriazole, 2.5 g of tri-dodecylmethyl quaternary ammonium salt docusate ionic liquid, 2.5 g of dioctyl phosphate octadecylamine salt, 6.0 g of low base value long chain linear alkylbenzene sulfonate calcium, 1.5 g of lanolin magnesium soap and 1.5 g of diethylene glycol monobutyl ether in sequence, stir at 70±5°C for 3 hours, the resulting mixture is uniform and transparent, and cool to room temperature (25°C) to obtain anti-rust lubricating oil.

[0048] Example 3

[0049] Add 66.7 g of No. 32 industrial white oil to 27.0 g of No. 10 industrial white oil, heat to 70±5°C and stir, then add 0.2 g of 2,6-di-tert-butyl mixed phenol, 0.1 g of N,N-dibutylaminomethylmethylenebenzotriazole, 1.0 g of tri-dodecylmethyl quaternary ammonium salt docusate ionic liquid, 1.0 g of dioctyl phosphate octadecylamine salt, 3.0 g of low base value long chain linear alkylbenzene sulfonate calcium, 0.5 g of lanolin magnesium soap and 0.5 g of diethylene glycol monobutyl ether in sequence, stir at 70±5°C for 3 hours, the resulting mixture is uniform and transparent, and cool to room temperature (25°C) to obtain anti-rust lubricating oil.

[0050] Comparative Example 1

[0051] The rust-proof lubricating oil was prepared according to Example 3, except that 1.0 g of tri-dodecylmethyl quaternary ammonium salt docusate ionic liquid, 1.0 g of dioctyl phosphate octadecylamine salt and 3.0 g of low-base long-chain linear alkylbenzene sulfonate calcium were replaced with 1.5 g of dioctyl phosphate octadecylamine salt and 3.5 g of low-base long-chain linear alkylbenzene sulfonate calcium.

[0052] Comparative Example 2

[0053] The rust-proof lubricating oil was prepared according to Example 3, except that 1.0 g of tri-dodecyl methyl quaternary ammonium salt docusate ionic liquid, 1.0 g of dioctyl phosphate octadecylamine salt and 3.0 g of low-base long-chain linear alkylbenzene sulfonate calcium were replaced with 1.5 g of tri-dodecyl methyl quaternary ammonium salt docusate ionic liquid and 3.5 g of low-base long-chain linear alkylbenzene sulfonate calcium.

[0054] Comparative Example 3

[0055] Anti-rust oil was prepared according to Example 3 in patent CN202010706855.1, with the formula: 39.9 g paraffin mineral oil, 51.0 g aromatic hydrocarbon solvent oil, 5.0 g polyether, 0.1 g amine antioxidant, 2.0 g petroleum sulfonate, 1.6 g dinonylnaphthalene sulfonate, and 0.4 g dibasic acid.

[0056] Test Case

[0057] The rust-proof lubricating oils prepared in the embodiments and comparative examples were subjected to performance tests, including water-soluble acid and alkali determination of petroleum products (GB / T 259), film removal test of rust-proof grease (SH / T 0212), copper sheet corrosion test of petroleum products (GB / T5096), wet heat test of rust-proof grease (GB / T 2361), salt spray test of rust-proof grease (SH / T 0081), corrosion test of rust-proof grease (SH / T 0080), determination of lubricant load-bearing capacity (GB / T 3142), determination of anti-wear performance of lubricating oil (NB / SH / T 0189) and gelling test (GB / T 8597A.4). The test results are shown in Table 1.

[0058] Table 1 Performance test results of rust-proof lubricating oils prepared in Examples and Comparative Examples

[0059]

[0060]

[0061] As shown in Table 1, the rust-proof lubricating oil provided by the present invention has excellent salt spray resistance, corrosion performance under hot and humid conditions and lubrication performance. At the same time, as shown in Example 3 and Comparative Examples 1 to 3, in the rust-proof lubricating oil provided by the present invention, the tri-dodecylmethyl quaternary ammonium salt docusate ionic liquid has excellent corrosion resistance, rust prevention and lubrication performance, and the best effect can be achieved by compounding it with dioctyl phosphate octadecylamine salt and low base value long-chain linear alkylbenzene sulfonate calcium.

[0062] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A rust-proof lubricating oil, free of barium, comprising the following components by mass percentage: 79.0-93.7% base oil; 0.2-1.0% antioxidant; 0.1-1.0% metal passivator; 5.0-15.0% rust-proof agent; 0.5-2.0% film-forming agent; 0.5-2.0% penetrant; The rust inhibitor is tri-dodecyl methyl quaternary ammonium salt docusate ionic liquid, dioctyl phosphate octadecylamine salt and low-base long-chain linear alkylbenzene sulfonate calcium, the number of alkyl carbon atoms of the low-base long-chain linear alkylbenzene sulfonate calcium is 20-24, and the base number is 20-35; the mass ratio of the tri-dodecyl methyl quaternary ammonium salt docusate ionic liquid, dioctyl phosphate octadecylamine salt and low-base long-chain linear alkylbenzene sulfonate calcium is 1.0-3.0:1.0-3.0:3.0-9.0; The metal passivator is N,N-dibutylaminomethylmethylenebenzotriazole; The penetrant is diethylene glycol monobutyl ether.

2. The rust-proof lubricating oil according to claim 1, characterized in that: The base oil is industrial white oil, and the kinematic viscosity of the industrial white oil at 40° C. is 2 to 45 mm 2 / s.

3. The rust-proof lubricating oil according to claim 2, characterized in that: The industrial white oil includes one or more of No. 3 industrial white oil, No. 5 industrial white oil, No. 7 industrial white oil, No. 10 industrial white oil, No. 15 industrial white oil and No. 32 industrial white oil.

4. The rust-proof lubricating oil according to claim 1, characterized in that: The antioxidant is 2,6-di-tert-butyl mixed phenol, 2,6-di-tert-butylphenol or alkyl diphenylamine.

5. The rust-proof lubricating oil according to claim 1, characterized in that: The film-forming agent is lanolin magnesium soap, lanolin or oxidized paraffin.

6. The method for preparing the rust-proof lubricating oil according to any one of claims 1 to 5, comprising the following steps: The base oil, antioxidant, metal passivator, rust inhibitor, film former and penetrant are mixed to obtain rust-proof lubricating oil.

7. Use of the anti-rust lubricating oil according to any one of claims 1 to 5 or the anti-rust lubricating oil prepared by the preparation method according to claim 6 in anti-rust lubrication of metal parts.

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