Long-life bearing rust preventive oil, its preparation method and application

Abstract

The application discloses long-life bearing rust-proof oil and a preparation method and application thereof. The long-life bearing rust-proof oil comprises the following components in parts by weight: 65-90 parts of base oil, 3-20 parts of barium sulfonate, 0.5-5 parts of calcium sulfonate, and 0.5-4 parts of extreme pressure anti-wear agent. The barium sulfonate is at least one selected from neutral barium sulfonate and basic barium dinonylnaphthalene sulfonate; and the calcium sulfonate is at least one selected from medium alkaline petroleum calcium sulfonate, low alkaline calcium sulfonate, synthetic calcium sulfonate and dinonylnaphthalene calcium sulfonate. The long-life bearing rust-proof oil can realize long-period rust-proof of bearings and achieves good technical effects. In the prior art, the protection performance of bearing rust-proof oil is not long-term effective, the long-life bearing rust-proof oil has good salt fog performance and damp heat performance, and has a wide application market.

Description

Technical Field

[0001] This invention relates to the field of bearing rust prevention, and in particular to a long-life bearing rust-preventive oil, its preparation method, and its application. Background Technology

[0002] A bearing is a component that supports a shaft, guiding its rotation and supporting rotating parts. Bearings reduce friction and ensure smoother rotation, making them crucial mechanical parts. Bearing rings and rollers are primarily made of high-carbon bearing steel. This material, with its high carbon content, exhibits a chemical potential difference between iron and carbon compounds and iron in its metallographic structure, making it prone to electrochemical corrosion in humid atmospheric and saline marine environments. For specific bearing materials and combinations, effective protection of the bearing surface is essential. Bearing life is positively correlated with its corrosion resistance; therefore, long-life bearing rust-preventive oils ensure efficient bearing operation. Based on current conditions, developing a bearing rust-preventive oil with a long rust-prevention period has a broad application market potential.

[0003] The prior art, Chinese invention patent application publication CN110776981A, discloses a long-life bearing rust-preventive oil and its preparation method, composed of the following components by weight percentage: base oil 15-25%; neutral barium sulfonate 10-15%; alkylbenzene sulfonate barium 2-5%; high-alkalinity calcium sulfonate 2-5%; butyl paraffin oxide 1-5%; emulsifier 1-2%; antioxidant 0.1-0.5%; and the balance being solvent oil. However, the bearing rust-preventive oil prepared by this invention lacks extreme pressure resistance data, and its salt spray test in rust prevention is no less than 72 hours, which cannot fully meet the needs of some long-term requirements. Summary of the Invention

[0004] To address the aforementioned problems in the existing technology, this invention provides a long-life bearing rust-preventive oil with a long rust-prevention cycle.

[0005] The first aspect of this invention provides a rust-preventive oil, comprising, by weight, the following components: 65-90 parts of base oil; 6-20 parts of barium sulfonate; 0.5-5 parts of calcium sulfonate; and 0.5-4 parts of extreme pressure anti-wear agent. The barium sulfonate is selected from at least one of neutral barium sulfonate (grade T701B) and basic dinonylnaphthalene sulfonate (grade T705). More preferably, the barium sulfonate is selected from barium sulfonate products with an effective content (barium sulfonate) greater than 50%. The calcium sulfonate is selected from at least one of medium-alkalinity petroleum sulfonate (grade T102), low-alkalinity calcium sulfonate (grade T104), synthetic calcium sulfonate (grade T105), and dinonylnaphthalene sulfonate (grade T105C).

[0006] The neutral barium sulfonate and medium-alkaline calcium petroleum sulfonate described in this invention have an alkalinity of less than 20 mg KOH / g.

[0007] The low-alkali-value calcium sulfonate described in this invention has an alkali value of 30-50 mg KOH / g.

[0008] The rust-preventive oil provided by this invention uses 45# steel sheet as the rust-preventive performance test for ferrous metals. The damp heat test time is greater than 600h, with a longer time of 648h and a maximum time of 696h; the salt spray test time is not less than 96h and the longest is 120h.

[0009] According to some embodiments of the rust-preventive oil of the present invention, preferably, the long-life bearing rust-preventive oil comprises, by weight, the following components: 70 to 90 parts of base oil; 8 to 12 parts of barium sulfonate; 0.5 to 2 parts of calcium sulfonate; and 0.5 to 2 parts of extreme pressure anti-wear agent.

[0010] According to some embodiments of the rust-preventive oil of the present invention, preferably, the base oil is selected from at least two of mineral base oils or synthetic base oils.

[0011] According to some embodiments of the rust-preventive oil of the present invention, preferably, the mineral base oil is selected from at least one of MVI 60, MVI 70, MVI 75, MVI 100, MVI 125, MVI 150, HVI 60, HVI 75, HVI 100, HVI 125, HVI 150, HVI 500, HVI 650, HVI II-2, HVI II-4 and light white oil.

[0012] According to some embodiments of the rust-preventive oil of the present invention, preferably, the synthetic base oil is selected from at least one of dodecylbenzene and hexadecylbenzene.

[0013] According to some embodiments of the rust-preventive oil of the present invention, preferably, the extreme pressure anti-wear agent is selected from at least one of di-n-butyl phosphite (brand name T304), nitrogen-containing derivative of thiophosphate (brand name T305), phenyl thiophosphate (brand name T309), and ammonium thiophosphate (brand name T310).

[0014] A second aspect of the present invention provides a method for preparing the above-mentioned rust-preventive oil, comprising: mixing a base oil with barium sulfonate, calcium sulfonate and an extreme pressure anti-wear agent, heating and then isothermal treatment, cooling and then filtering to obtain the rust-preventive agent.

[0015] As a specific implementation method, the base oil is heated and then barium sulfonate, calcium sulfonate and extreme pressure anti-wear agent are added in sequence. The mixture is stirred at a constant temperature, cooled and filtered to obtain the rust inhibitor.

[0016] Preferably, the heating temperature is 70–80°C.

[0017] The heating temperature is 70℃, 75℃, 80℃, or any value between any two of the above.

[0018] According to some embodiments of the method described in this invention, preferably, the constant temperature is 60-70°C.

[0019] The constant temperature is 60℃, 65℃, 70℃, or any value between any two of the above.

[0020] Preferably, the stirring time is 2 to 4 hours.

[0021] The stirring time is 2 hours, 3 hours, 4 hours, or any value between any two of the above.

[0022] Preferably, the cooling is performed to a temperature of 35–45°C.

[0023] Preferably, the filtration is a bag filter.

[0024] According to another specific embodiment of the method described in this invention, the preparation method includes:

[0025] (1) Prepare raw materials according to the following components in parts by weight: 65-90 parts base oil; 3-20 parts barium sulfonate; 0.5-5 parts calcium sulfonate; 0.5-4 parts extreme pressure anti-wear agent; wherein, the base oil is selected from at least two of mineral base oils or synthetic base oils; the barium sulfonate is selected from at least one of neutral barium sulfonate and basic dinonylnaphthalene sulfonate; the calcium sulfonate is selected from at least one of medium-alkalinity petroleum sulfonate, low-alkalinity calcium sulfonate, synthetic calcium sulfonate, and dinonylnaphthalene sulfonate; the extreme pressure anti-wear agent is selected from at least one of di-n-butyl phosphite (brand name T304), nitrogen-containing derivative of thiophosphate (brand name T305), phenyl thiophosphate (brand name T309), and ammonium thiophosphate (brand name T310);

[0026] (2) Add the base oil to a reactor equipped with a stirrer and stir at a constant temperature of 70-80°C until completely dissolved to obtain material I;

[0027] (3) Add barium sulfonate, calcium sulfonate and extreme pressure anti-wear agent to material I in sequence, and stir for 2-4 hours under constant temperature of 60-70℃ to obtain material II;

[0028] (4) After material II is cooled to below 40°C, it is bag filtered to obtain long-life bearing rust-preventive oil.

[0029] The third aspect of the present invention provides the application of the above-described rust-preventive oil or the rust-preventive oil obtained by the above-described preparation method in long-term rust prevention of bearings.

[0030] The beneficial effects of this invention are:

[0031] The long-life bearing rust-preventive oil provided by this invention, through the selection of base oil, barium sulfonate, calcium sulfonate, and extreme pressure anti-wear agent, achieves excellent rust prevention and extreme pressure anti-wear properties. Experimental results also show that when the final prepared long-life bearing rust-preventive oil is used for long-term rust prevention of bearings, in salt spray rust prevention tests at 35℃±1℃, when the rust grade of 45# steel sheet is A, the required test time can be up to 96 hours, demonstrating good salt spray rust prevention performance. In damp heat rust prevention tests at 49℃±1℃ and 95% relative humidity, when the rust grade of 45# steel sheet is A, the required test time can be up to 600 hours, demonstrating good damp heat rust prevention performance. Therefore, this long-life bearing rust-preventive oil can achieve long-term rust prevention of bearings, achieving good technical results. Existing technologies for rust-preventive oils in bearings do not provide sufficient long-term protection. The long-life rust-preventive oil of this invention has excellent salt spray and damp heat performance and has a broad application market. Detailed Implementation

[0032] To make the present invention easier to understand, the present invention will be described in detail below with reference to embodiments. These embodiments are for illustrative purposes only and are not limited to the scope of application of the present invention.

[0033] 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.

[0034] All of the above-mentioned raw materials in this invention can be prepared in-house or commercially available:

[0035] Neutral barium sulfonate, grade T701B;

[0036] Barium dinonylnaphthalenesulfonate, grade T705;

[0037] Medium-alkalinity petroleum sulfonate, grade T102;

[0038] Low-alkalinity calcium sulfonate, grade T104;

[0039] Synthetic calcium sulfonate, grade T105;

[0040] In dinonylnaphthalenesulfonate calcium, the grade is T105C;

[0041] Dibutyl phosphite, grade T304;

[0042] Nitrogen-containing derivative of thiophosphate, grade T305;

[0043] Phenyl thiophosphate, grade T309;

[0044] Ammonium thiophosphate, grade T310.

[0045] Example 1

[0046] Rust-preventive oil, by weight, consists of the following components:

[0047] Base oil: HVI 75, 51.5 parts; dodecylbenzene, 38.3 parts;

[0048] Barium sulfonate: Neutral barium sulfonate, 8 parts;

[0049] Calcium sulfonate: Medium-alkalinity petroleum sulfonate, 1.5 parts;

[0050] Extreme pressure anti-wear agent: di-n-butyl phosphite, 0.7 parts.

[0051] Preparation method of rust-preventive oil: Prepare raw materials according to the above components; add base oil to a reaction vessel with stirring, and stir at a constant temperature of 75±5℃ until completely dissolved to obtain material I; add barium sulfonate, calcium sulfonate and extreme pressure anti-wear agent to material I in sequence, and stir at a constant temperature of 65±5℃ for 3.5±0.5h to obtain material II; after material II is cooled to below 40℃, filter it with a 10μm bag filter to obtain long-life bearing rust-preventive oil 1#.

[0052] Example 2

[0053] Rust-preventive oil, by weight, consists of the following components:

[0054] Base oils: HVI 75, 51.5 parts; HVI 500, 35.8 parts;

[0055] Barium sulfonate: neutral barium sulfonate, 8 parts; basic dinonylnaphthalene sulfonate, 3 parts;

[0056] Calcium sulfonate: Medium-alkalinity petroleum sulfonate, 1 part;

[0057] Extreme pressure anti-wear agent: phenyl thiophosphate, 0.7 parts.

[0058] The rust-preventive oil was prepared using the same method as in Example 1, resulting in long-life bearing rust-preventive oil #2.

[0059] Example 3

[0060] Rust-preventive oil, by weight, consists of the following components:

[0061] Base oils: HVI 100, 40 parts; HVI 500, 47 parts;

[0062] Barium sulfonate: neutral barium sulfonate, 8 parts; basic dinonylnaphthalene sulfonate, 3 parts;

[0063] Calcium sulfonate: Medium-alkalinity petroleum sulfonate, 1 part;

[0064] Extreme pressure anti-wear agent: di-n-butyl phosphite, 1 part.

[0065] The rust-preventive oil was prepared using the same method as in Example 1, resulting in long-life bearing rust-preventive oil #3.

[0066] Example 4

[0067] Rust-preventive oil, by weight, consists of the following components:

[0068] Base oils: MVI 150, 42 parts; HVI 500, 45 parts;

[0069] Barium sulfonate: neutral barium sulfonate, 8 parts; basic dinonylnaphthalene sulfonate, 3 parts;

[0070] Calcium sulfonate: Medium-alkalinity petroleum sulfonate, 1 part;

[0071] Extreme pressure anti-wear agent: di-n-butyl phosphite, 1 part.

[0072] The rust-preventive oil was prepared using the same method as in Example 1, resulting in long-life bearing rust-preventive oil #4.

[0073] Example 5

[0074] Rust-preventive oil, by weight, consists of the following components:

[0075] Base oils: HVI 150, 40 parts; HVI 650, 46 parts;

[0076] Barium sulfonate: neutral barium sulfonate, 4 parts; basic dinonylnaphthalene sulfonate, 8 parts;

[0077] Calcium sulfonate: 1 part of synthetic calcium sulfonate;

[0078] Extreme pressure anti-wear agent: di-n-butyl phosphite, 1 part.

[0079] The rust-preventive oil was prepared using the same method as in Example 1, resulting in long-life bearing rust-preventive oil #5.

[0080] Example 6

[0081] Rust-preventive oil, by weight, consists of the following components:

[0082] Base oils: HVI 100, 40 parts; HVI 500, 47 parts;

[0083] Barium sulfonate: neutral barium sulfonate, 8 parts; basic dinonylnaphthalene sulfonate, 3 parts;

[0084] Calcium sulfonate: 1 part of synthetic calcium sulfonate;

[0085] Extreme pressure anti-wear agent: nitrogen-containing derivative of thiophosphate, 1 part.

[0086] The rust-preventive oil was prepared using the same method as in Example 1, resulting in long-life bearing rust-preventive oil #6.

[0087] Example 7

[0088] Rust-preventive oil, by weight, consists of the following components:

[0089] Base oils: MVI 100, 40 parts; HVI 650, 48 parts;

[0090] Barium sulfonate: neutral barium sulfonate, 2 parts; basic dinonylnaphthalene sulfonate, 8 parts;

[0091] Calcium sulfonate: Dinonylnaphthalene sulfonate calcium, 1 part;

[0092] Extreme pressure anti-wear agent: Ammonium thiophosphate, 1 part.

[0093] The rust-preventive oil was prepared using the same method as in Example 1, resulting in long-life bearing rust-preventive oil #7.

[0094] Comparative Example 1

[0095] Rust-preventive oil, by weight, consists of the following components:

[0096] Base oils: MVI 100, 40 parts; HVI 650, 50 parts;

[0097] Barium sulfonate: Basic dinonylnaphthalene sulfonate, 9 parts;

[0098] Extreme pressure anti-wear agent: di-n-butyl phosphite, 1 part.

[0099] The method for preparing the rust-preventive oil is the same as in Example 1, resulting in bearing rust-preventive oil A.

[0100] Comparative Example 2

[0101] Rust-preventive oil, by weight, consists of the following components:

[0102] Base oils: MVI 100, 40 parts; HVI 650, 49 parts;

[0103] Barium sulfonate: Neutral barium sulfonate, 10 parts;

[0104] Extreme pressure anti-wear agent: Ammonium thiophosphate, 1 part.

[0105] The method for preparing the rust-preventive oil is the same as in Example 1, resulting in bearing rust-preventive oil B.

[0106] Comparative Example 3

[0107] Rust-preventive oil, by weight, consists of the following components:

[0108] Base oils: MVI 100, 50 parts; HVI 650, 40 parts;

[0109] Barium sulfonate: neutral barium sulfonate, 2 parts; basic dinonylnaphthalene sulfonate, 3 parts;

[0110] Calcium sulfonate: Dinonylnaphthalene sulfonate, 2 parts; Synthetic calcium sulfonate, 6 parts;

[0111] Extreme pressure anti-wear agent: Ammonium thiophosphate, 2 parts.

[0112] The method for preparing the rust-preventive oil is the same as in Example 1, resulting in bearing rust-preventive oil C.

[0113] Test case

[0114] The performance of the bearing rust-preventive oils prepared in Examples 1-7 and Comparative Examples 1-3 was tested.

[0115] Various performance tests were conducted on ferrous metals, using 45# steel sheets as an example.

[0116] (1) Degreasing performance was tested according to JB / T4323.2-1999.

[0117] (2) The damp heat test time shall be tested in accordance with GB / T 2361-1992.

[0118] (3) The salt spray test time shall be tested in accordance with SH / T 0081-1991.

[0119] Table 1. Performance data of rust-preventive oils in Examples 1-7 and Comparative Examples 1-3

[0120]

[0121] As shown in Table 1, in the rust prevention performance tests of the long-life bearing rust-preventive oils prepared in Examples 1-7, the damp heat test time for Examples 1-7 was all greater than 600 hours, and the salt spray test time was all not less than 96 hours. This indicates that the long-life bearing rust-preventive oil prepared by this invention has good rust prevention performance. Compared with the use of barium sulfonate and calcium sulfonate alone (Comparative Examples 1 and 2), the overall rust prevention performance (damp heat test and salt spray test) is better. Compared with Comparative Example 3, although barium sulfonate and calcium sulfonate were used simultaneously, the proportion of barium sulfonate was less than 6%, and the overall rust prevention performance (damp heat test and salt spray test) was still not greater than 48 hours. Therefore, barium sulfonate and calcium sulfonate can be combined to enhance rust prevention performance, but the proportion of barium sulfonate must be greater than 6% to ensure that the salt spray test time is not less than 96 hours. Therefore, the technical effect of the long-life bearing rust-preventive oil of this invention is excellent.

[0122] Therefore, the long-life bearing rust-preventive oil prepared by the present invention through the synergistic ratio of base oil with barium sulfonate, calcium sulfonate and extreme pressure anti-wear agent has good rust-preventive performance and can realize long-term rust prevention application of bearings.

[0123] The above description is merely a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, based on the technical teachings provided by the present invention and as common knowledge in the field, other equivalent modifications and improvements can be made, and these should also be considered within the scope of protection of the present invention.

Claims

1. Rust-preventive oil, by weight, consists of the following components: 70-90 parts base oil; 8-12 parts of barium sulfonate; 0.5 to 2 parts of calcium sulfonate; 0.5 to 2 parts of extreme pressure anti-wear agent; The barium sulfonate is selected from at least one of neutral barium sulfonate and basic dinonylnaphthalene sulfonate; The calcium sulfonate is selected from at least one of medium-alkalinity petroleum calcium sulfonate, low-alkalinity calcium sulfonate, synthetic calcium sulfonate T105, and dinonylnaphthalene calcium sulfonate. The extreme pressure anti-wear agent is selected from at least one of di-n-butyl phosphite, nitrogen-containing derivative of thiophosphate T305, phenyl thiophosphate, and ammonium thiophosphate. The base oil is selected from at least two of mineral base oils or synthetic base oils; The mineral base oil is selected from at least one of MVI 60, MVI 70, MVI 75, MVI 100, MVI 125, MVI 150, HVI 60, HVI 75, HVI 100, HVI 125, HVI 150, HVI 500, HVI 650, HVI II-2, HVI II-4 and light white oil; The synthetic base oil is selected from at least one of dodecylbenzene and hexadecylbenzene.

2. The method for preparing the rust-preventive oil according to claim 1, comprising: The base oil is mixed with barium sulfonate, calcium sulfonate and extreme pressure anti-wear agent, heated and kept at a constant temperature, cooled and filtered to obtain the rust-preventive oil.

3. The preparation method according to claim 2, characterized in that, The heating temperature is 70–80°C.

4. The preparation method according to claim 2 or 3, characterized in that, The constant temperature is 60–70°C; And / or, the isothermal treatment is isothermal stirring, and the stirring time is 2 to 4 hours; And / or, the cooling to a temperature of 35–45°C; And / or, the filtration is a bag filter.

5. The application of the rust-preventive oil according to claim 1 in bearing rust prevention.

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