Long-lasting thixotropic rust preventive oil composition and method for producing the same

Abstract

The application discloses a long-acting thixotropic rust-proof oil composition which is composed of the following components in mass fraction: base oil 70-95 parts, rust-proof agent 5-15 parts, auxiliary rust-proof agent 1-5 parts, antioxidant 0.1-1 part, thixotropic agent 1-20 parts and film forming agent 1-5 parts. The application also discloses a preparation method thereof, wherein after the components are weighed, the base oil is heated and stirred, and then added into the film forming agent to obtain mixture A; the mixture A is added into the thixotropic agent, the rust-proof agent, the auxiliary rust-proof agent and the antioxidant in sequence, and then constant-temperature stirring is conducted to obtain mixture B; after the mixture B is filtered, the filtrate is the composition of the application. The long-acting thixotropic rust-proof oil composition has a high thixotropic index, is not prone to flowing, and can keep a stable oil film thickness on the surface of a workpiece; under the conditions of damp heat and salt spray, the long-acting thixotropic rust-proof oil composition can exhibit more excellent rust-proof performance, and is suitable for harsh storage or transportation conditions such as sea transportation.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of metal processing fluid, and relates to a long-acting thixotropic rust-proof oil composition, and also relates to a preparation method of the long-acting thixotropic rust-proof oil composition. BACKGROUND

[0002] Metal rusting problems are widespread in various industries of the national economy. In industrial manufacturing, adopting rust-proof oil for protection is one of the most important metal product protection methods. However, in some specific scenarios, such as sea transportation, precision machine tool protection, cold-rolled plate delivery and the like, ordinary rust-proof oil is difficult to meet the rust-proof requirements due to easy flow loss. The steel industry needs to spray rust-proof oil with pre-lubricating effect before the delivery of cold-rolled plates, and the rust-proof oil needs to have the characteristics of anti-piling rust-proof, lubrication and stable oil film. The ordinary soft film rust-proof oil cannot meet the requirement of stable oil film, and the hard film rust-proof oil is difficult to achieve the requirements of cleaning and lubrication. SUMMARY

[0003] The application aims to provide a long-acting thixotropic rust-proof oil composition, and solve the problem that the rust-proof oil coating on the surface of a workpiece is prone to flow, resulting in a short rust-proof time.

[0004] Another object of the application is to provide a preparation method of the long-acting thixotropic rust-proof oil composition.

[0005] The technical scheme adopted by the application is that the long-acting thixotropic rust-proof oil composition is composed of the following components in terms of mass fraction: 70-95 parts of base oil, 5-15 parts of rust-proof agent, 1-5 parts of auxiliary rust-proof agent, 0.1-1 part of antioxidant, 1-20 parts of thixotropic agent and 1-5 parts of film-forming agent.

[0006] The application is also characterized in that the base oil is at least one of a mineral base oil or a synthetic base oil;

[0007] The mineral base oil is at least one of HVI75, HVI150, HVI500, No. 10 transformer oil, No. 20 transformer oil or No. 40 transformer oil;

[0008] The synthetic base oil is at least one of a polyether synthetic ester or PAO.

[0009] The rust-proof agent is at least one of a barium sulfonate, a calcium sulfonate, a sodium sulfonate or a magnesium sulfonate; preferably at least one or two of a barium sulfonate or a calcium sulfonate in any proportion;

[0010] The sodium sulfonate is preferably petroleum sodium sulfonate;

[0011] The barium sulfonate is any one of petroleum barium sulfonate or neutral dinonyl naphthalene barium sulfonate, and is preferably neutral dinonyl naphthalene barium sulfonate;

[0012] The calcium sulfonate salt is any one of petroleum calcium sulfonate, neutral synthetic calcium sulfonate, neutral calcium dinonylnaphthalene sulfonate or calcium sulfonate carboxylic acid complex, preferably neutral calcium dinonylnaphthalene sulfonate.

[0013] The auxiliary rust inhibitor is at least one of dibutyl phthalate, dioctyl phthalate, ethanol, butanol, silicone oil, methyl silicone oil, sorbitan fatty acid ester, benzotriazole, benzotriazole derivative, imidazoline derivative, alkenyl succinic acid, alkenyl succinic acid ester or zinc naphthenate;

[0014] The auxiliary rust inhibitor is preferably at least one of sorbitan fatty acid ester or alkenyl succinic acid, when the auxiliary rust inhibitor is both sorbitan fatty acid ester and alkenyl succinic acid, the mass ratio of sorbitan fatty acid ester to alkenyl succinic acid is 1:1;

[0015] The sorbitan fatty acid ester is preferably Span 80;

[0016] The alkenyl succinic acid is preferably dodecenyl succinic acid.

[0017] The antioxidant is any one of phenolic antioxidant, aniline antioxidant or ene acid antioxidant, preferably phenolic antioxidant; the phenolic antioxidant is preferably 2,6-di-tert-butyl-p-cresol.

[0018] The thixotropic agent is any one of dextran, dextran alkenyl succinate, mannan, mannitol oleate, hydrogenated castor oil, fumed silica, modified polyurea, thixotropic calcium sulfonate, organic bentonite or aluminum distearate; preferably any one of hydrogenated castor oil, mannan, thixotropic calcium sulfonate or mannitol oleate.

[0019] The film forming agent is any one of vaseline, paraffin, oxidized paraffin, oil-soluble asphalt, phenolic resin, rosin, terpene resin, polyolefin resin, ethylene-propylene rubber, aromatic petroleum resin, lanolin or lanolin soap; preferably any one of oxidized paraffin or lanolin.

[0020] Another technical solution adopted by the present application is a preparation method of long-acting thixotropic rust-proof oil composition, which is specifically implemented according to the following steps:

[0021] Step 1: according to the mass fraction, the following components are weighed: 70-95 parts of base oil, 5-15 parts of rust inhibitor, 1-5 parts of auxiliary rust inhibitor, 0.1-1 part of antioxidant, 1-20 parts of thixotropic agent and 1-5 parts of film forming agent;

[0022] Step 2: the base oil weighed in step 1 is added to a stirring kettle and heated and stirred;

[0023] Step 3. Add the film-forming agent weighed in step 1 into the base oil stirred in step 2, and stir at constant temperature to obtain mixture A;

[0024] Step 4: Add the thixotropic agent, the rust inhibitor, the auxiliary rust inhibitor and the antioxidant weighed in step 1 into mixture A obtained in step 3 in sequence, and stir at constant temperature to obtain mixture B;

[0025] Step 5: Filter mixture B obtained in step 4 with a 800-300 mesh filter bag, and the filtrate is the composition of the present application.

[0026] The present application also has the following technical solutions:

[0027] The heating temperature in step 2 is 70-80℃;

[0028] The constant temperature in step 3 is 60-70℃, and the stirring time is 0.2-2h;

[0029] The constant temperature in step 4 is 50-60℃, and the stirring time is 1-4h.

[0030] The stirring frequency in step 3 is greater than 500r / min, and the stirring frequency in step 4 is greater than 1000r / min.

[0031] The present application has the following beneficial effects: the long-acting thixotropic rust-proof oil composition has a high thixotropic index, is not easy to flow, and can maintain a stable oil film thickness on the surface of a workpiece; and the composition can exhibit more excellent rust-proof performance under humid heat and salt spray conditions, and is suitable for harsh storage or transportation conditions such as sea transportation. DETAILED DESCRIPTION

[0032] The present application will be described in detail below in combination with specific embodiments.

[0033] The long-acting thixotropic rust-proof oil composition of the present application is composed of the following components in mass fraction:

[0034] 70-95 parts of base oil, 5-15 parts of rust inhibitor, 1-5 parts of auxiliary rust inhibitor, 0.1-1 part of antioxidant, 1-20 parts of thixotropic agent, and 1-5 parts of film-forming agent.

[0035] Preferably, the base oil is at least one of a mineral base oil or a synthetic base oil;

[0036] Preferably, the mineral base oil is at least one of HVI75, HVI150, HVI500, No. 10 transformer oil, No. 20 transformer oil or No. 40 transformer oil;

[0037] Preferably, the synthetic base oil is at least one of polyether synthetic ester or PAO.

[0038] Preferably, the rust-preventive agent is any one of barium sulfonate, calcium sulfonate, sodium sulfonate or magnesium sulfonate; preferably at least one or two of barium sulfonate or calcium sulfonate in any proportion;

[0039] The sodium sulfonate is preferably petroleum sodium sulfonate.

[0040] The barium sulfonate is any one of petroleum barium sulfonate or neutral dinonyl naphthalene barium sulfonate, preferably neutral dinonyl naphthalene barium sulfonate.

[0041] The calcium sulfonate is any one of petroleum calcium sulfonate, neutral synthetic calcium sulfonate, neutral dinonyl naphthalene calcium sulfonate or calcium sulfonate carboxylic acid complex, preferably neutral dinonyl naphthalene calcium sulfonate.

[0042] Preferably, the auxiliary rust-preventive agent is at least one of dibutyl phthalate, dioctyl phthalate, ethanol, butanol, silicone oil, methyl silicone oil, sorbitan fatty acid ester, benzotriazole, benzotriazole derivative, imidazoline derivative, alkenyl succinic acid, alkenyl succinic acid ester or zinc naphthenate.

[0043] Preferably, the auxiliary rust-preventive agent is at least one of sorbitan fatty acid ester or alkenyl succinic acid, and when the auxiliary rust-preventive agent is both sorbitan fatty acid ester and alkenyl succinic acid, the mass ratio of sorbitan fatty acid ester to alkenyl succinic acid is 1:1.

[0044] Preferably, the sorbitan fatty acid ester is Span 80.

[0045] Preferably, the alkenyl succinic acid is dodecenyl succinic acid.

[0046] Preferably, the antioxidant is any one of phenolic antioxidant, aniline antioxidant or ene acid antioxidant, preferably phenolic antioxidant; the phenolic antioxidant is preferably 2,6-di-tert-butyl-p-cresol.

[0047] Preferably, the thixotropic agent is any one of dextran, dextran alkenyl succinate, mannitol, mannitol oleate, hydrogenated castor oil, fumed silica, modified polyurea, thixotropic calcium sulfonate, organic bentonite or aluminum distearate; preferably any one of hydrogenated castor oil, mannitol, thixotropic calcium sulfonate or mannitol oleate.

[0048] Preferably, the film-forming agent is any one of vaseline, paraffin, oxidized paraffin, oil-soluble asphalt, phenol formaldehyde resin, rosin, terpene resin, polyolefin resin, ethylene-propylene rubber, aromatic petroleum resin, lanolin or lanolin soap; preferably any one of oxidized paraffin or lanolin.

[0049] The main formula in the long-acting thixotropic rust-preventive oil composition of the present application plays the following roles respectively:

[0050] Base oil: provides sufficient carrier for various additives.

[0051] Anti-rust agent: provides basic anti-rust performance for the composition.

[0052] Auxiliary anti-rust agent: helps the anti-rust agent to exert anti-rust performance.

[0053] Antioxidant: can meet the anti-oxidation requirements of the composition under different conditions, ensuring the stability of the composition.

[0054] Thixotropic agent: provides different degrees of thixotropy to the composition.

[0055] Film-forming agent: can increase the adsorption amount and adsorption strength of the anti-rust agent, thereby improving the anti-rust performance of the composition.

[0056] The preparation method of the long-acting thixotropic anti-rust oil composition of the present application is implemented according to the following steps:

[0057] Step 1: the following components are weighed according to the mass fraction:

[0058] Base oil 70-95 parts, anti-rust agent 5-15 parts, auxiliary anti-rust agent 1-5 parts, antioxidant 0.1-1 part, thixotropic agent 1-20 parts, and film-forming agent 1-5 parts.

[0059] Step 2: the base oil weighed in step 1 is added to a stirring kettle and heated and stirred for 0.2-0.5 h, with a heating temperature of 70-80°C.

[0060] Step 3: the film-forming agent weighed in step 1 is added to the base oil stirred in step 2, and constant temperature stirring is performed to obtain mixture A, with a constant temperature of 60-70°C, a stirring time of 0.2-2 h, and a stirring frequency of more than 500 r / min.

[0061] Step 4: the thixotropic agent, anti-rust agent, auxiliary anti-rust agent, and antioxidant weighed in step 1 are sequentially added to the mixture A obtained in step 3, and constant temperature stirring is performed to obtain mixture B, with a constant temperature of 50-60°C, a stirring time of 1-4 h, and a stirring frequency of more than 1000 r / min.

[0062] Step 5: the mixture B obtained in step 4 is filtered with a 800-300 mesh filter bag, and the filtrate is the composition of the present application.

[0063] Example 1

[0064] The preparation method of the long-acting thixotropic anti-rust oil composition of the present application is implemented according to the following steps:

[0065] Step 1, the following components are weighed according to mass fraction respectively: HVI150, 10 parts; No. 10 transformer oil, 70.5 parts; petroleum sulfonic acid sodium, 1 part; neutral dinonyl naphthalene sulfonic acid barium, 10 parts; hydrogenated castor oil, 4 parts; dodecenyl succinic acid, 1 part; siben 80, 1 part; 2, 6-di-tert-butyl-p-cresol, 0.5 parts; oxidized paraffin wax, 2 parts.

[0066] Step 2, the HVI150 and No. 10 transformer oil weighed in step 1 are added into a stirring kettle and heated and stirred for 0.2h, and the heating temperature is 70℃.

[0067] Step 3, the HVI150 and No. 10 transformer oil after stirring in step 2 are added with the oxidized paraffin wax weighed in step 1 to constant temperature stirring to obtain a mixture A, the constant temperature is 60℃, the stirring time is 0.2h, and the stirring frequency is 600r / min.

[0068] Step 4, the petroleum sulfonic acid sodium, neutral dinonyl naphthalene sulfonic acid barium, hydrogenated castor oil, dodecenyl succinic acid, siben 80, 2, 6-di-tert-butyl-p-cresol weighed in step 1 are sequentially added into the mixture A obtained in step 3 to constant temperature stirring to obtain a mixture B, the constant temperature is 60℃, the stirring time is 4h, and the stirring frequency is 1100r / min.

[0069] Step 5: the mixture B obtained in step 4 is filtered with an 800 mesh filter bag, and the filtrate is the composition of the application.

[0070] Example 2

[0071] The preparation method of the long-acting thixotropic rust-proof oil composition of the application is specifically implemented according to the following steps:

[0072] Step 1, the following components are weighed according to mass fraction respectively: HVI500, 10 parts; No. 10 transformer oil, 73 parts; neutral dinonyl naphthalene sulfonic acid calcium, 10 parts; mannitol, 4 parts; siben 80, 1 part; 2, 6-di-tert-butyl-p-cresol, 0.5 parts; lanolin, 2 parts.

[0073] Step 2, the HVI500 and No. 10 transformer oil weighed in step 1 are added into a stirring kettle and heated and stirred for 0.4h, and the heating temperature is 80℃.

[0074] Step 3, the HVI500 and No. 10 transformer oil after stirring in step 2 are added with the lanolin weighed in step 1 to constant temperature stirring to obtain a mixture A, the constant temperature is 65℃, the stirring time is 2h, and the stirring frequency is 700r / min.

[0075] Step 4, after adding the neutral dinonyl naphthalene sulfonic acid calcium, mannitol, Span 80 and 2, 6-di-tert-butyl-p-cresol weighed in step 1 in the mixture A obtained in step 3 in turn constant temperature stirring, obtain mixture B, constant temperature temperature is 50℃, stirring time is 1h;Stirring frequency is 1200r / min.

[0076] Step 5: the mixture B obtained in step 4 is filtered with a 300 mesh filter bag, and the filtrate is the composition of the application.

[0077] Example 3

[0078] The preparation method of the long-acting thixotropic rust-proof oil composition of the application is specifically implemented according to the following steps:

[0079] Step 1, the following components are weighed according to mass fraction: HVI150, 10 parts; No. 20 transformer oil, 72 parts; neutral dinonyl naphthalene sulfonic acid barium, 5 parts; neutral dinonyl naphthalene sulfonic acid calcium, 5 parts; thixotropic calcium sulfonate, 3 parts; 2, 6-di-tert-butyl-p-cresol, 0.5 parts; oxidized paraffin wax, 4 parts.

[0080] Step 2, the HVI150 and No. 20 transformer oil weighed in step 1 are added to a stirring kettle and heated and stirred for 0.5h, and the heating temperature is 75℃.

[0081] Step 3, the oxidized paraffin wax weighed in step 1 is added to the HVI150 and No. 20 transformer oil stirred in step 2, and constant temperature stirring is carried out to obtain mixture A, the constant temperature temperature is 70℃, the stirring time is 1h;Stirring frequency is 800r / min.

[0082] Step 4, after adding the neutral dinonyl naphthalene sulfonic acid barium, neutral dinonyl naphthalene sulfonic acid calcium, thixotropic calcium sulfonate and 2, 6-di-tert-butyl-p-cresol weighed in step 1 in the mixture A obtained in step 3 in turn constant temperature stirring, obtain mixture B, constant temperature temperature is 55℃, stirring time is 2h;Stirring frequency is 1300r / min.

[0083] Step 5: the mixture B obtained in step 4 is filtered with a 500 mesh filter bag, and the filtrate is the composition of the application.

[0084] Example 4

[0085] The long-acting thixotropic rust-proof oil composition is prepared by weighing the following components according to mass fraction:

[0086] HVI500, 10 parts; No. 20 transformer oil, 67 parts; petroleum sulfonate sodium, 5 parts; neutral dinonyl naphthalene sulfonic acid barium, 8 parts; neutral dinonyl naphthalene sulfonic acid calcium, 2 parts; anhydromannitol oleate, 4 parts; lanolin, 4 parts.

[0087] The preparation method is as shown in example 3.

[0088] Example 5

[0089] Long-acting thixotropic rust preventive oil composition, the following components were weighed according to mass fraction respectively:

[0090] No. 10 transformer oil, 82.5 parts; sodium petroleum sulfonate, 1 part; neutral dinonyl naphthalene sulfonate barium, 10 parts; hydrogenated castor oil, 4 parts; dodecenyl succinic acid, 1 part; Span 80, 1 part; 2,6-di-tert-butyl-p-cresol, 0.5 part; oxidized paraffin wax, 2 parts.

[0091] The preparation method is as shown in Example 3.

[0092] Example 6

[0093] Long-acting thixotropic rust preventive oil composition, the following components were weighed according to mass fraction respectively:

[0094] PAO, 85 parts; neutral dinonyl naphthalene sulfonate calcium, 10 parts; mannitol, 4 parts; Span 80, 1 part; lanolin, 2 parts.

[0095] The preparation method is as shown in Example 3.

[0096] Example 7

[0097] Long-acting thixotropic rust preventive oil composition, the following components were weighed according to mass fraction respectively:

[0098] HVI150, 85.5 parts; neutral dinonyl naphthalene sulfonate barium, 5 parts; neutral dinonyl naphthalene sulfonate calcium, 5 parts; thixotropic calcium sulfonate, 3 parts; dodecenyl succinic acid, 1 part; 2,6-di-tert-butyl-p-cresol, 0.5 part; oxidized paraffin wax, 4 parts.

[0099] The preparation method is as shown in Example 3.

[0100] Example 8

[0101] Long-acting thixotropic rust preventive oil composition, the following components were weighed according to mass fraction respectively:

[0102] PAO, 81 parts; sodium petroleum sulfonate, 5 parts; neutral dinonyl naphthalene sulfonate barium, 8 parts; neutral dinonyl naphthalene sulfonate calcium, 2 parts; anhydrous mannitol oleate, 4 parts; lanolin, 4 parts.

[0103] The preparation method is as shown in Example 3.

[0104] Example 9

[0105] Long-acting thixotropic rust preventive oil composition, the following components were weighed according to mass fraction respectively:

[0106] HVI 75, 70 parts; barium petroleum sulfonate, 5 parts; zinc naphthenate, 1 part; 2, 6-di-tert-butyl-p-cresol, 1 part; dextran, 20 parts; vaseline, 5 parts;

[0107] The preparation method is as shown in Example 3.

[0108] Example 10

[0109] The long-acting thixotropic rust-proof oil composition is prepared by taking the following components by mass fraction:

[0110] Polyether synthetic ester, 95 parts; calcium petroleum sulfonate, 15 parts; dioctyl phthalate, 5 parts; 2, 6-di-tert-butyl-p-cresol, 0.1 part; fumed silica, 1 part; oil-soluble asphalt, 1 part.

[0111] The preparation method is as shown in Example 3.

[0112] The performance comparison between the embodiment of the present application and the existing rust-proof oil is shown in the following table:

[0113]

[0114]

[0115] Compared with the existing rust-proof oil scheme, the salt spray A level time of the long-acting thixotropic rust-proof oil composition of the present application can be prolonged by 2 to 4 times, and the thixotropic index is increased by about 10% to 35%.

Claims

1. A long-lasting thixotropic rust preventive oil composition, characterized by, According to the mass fraction, the following components are composed: base oil 70-95 parts, rust inhibitor 5-15 parts, auxiliary rust inhibitor 1-5 parts, antioxidant 0.1-1 part, thixotropic agent 1-20 parts, film forming agent 1-5 parts; The base oil is synthetic base oil, or synthetic base oil and mineral base oil combined in any proportion; The mineral base oil is at least one of HVI75, HVI150, HVI500, No. 10 transformer oil, No. 20 transformer oil or No. 40 transformer oil; The synthetic base oil is at least one of polyether synthetic ester or PAO; The rust inhibitor is barium sulfonate, or barium sulfonate and calcium sulfonate compounded in any proportion; The barium sulfonate is any one of petroleum barium sulfonate or neutral barium dinonyl naphthalene sulfonate; The calcium sulfonate is any one of petroleum calcium sulfonate, neutral synthetic calcium sulfonate, neutral calcium dinonyl naphthalene sulfonate or sulfonate calcium carboxylic acid complex; The thixotropic agent is any one of mannitol or anhydrous mannitol oleate.

2. The long acting thixotropic rust preventive oil composition according to claim 1, characterized by, The barium sulfonate is neutral barium dinonyl naphthalene sulfonate.

3. The long acting thixotropic rust preventive oil composition according to claim 2, characterized by, The calcium sulfonate is neutral calcium dinonyl naphthalene sulfonate.

4. The long acting thixotropic rust preventive oil composition according to claim 1, characterized by, The auxiliary rust inhibitor is at least one of dibutyl phthalate, dioctyl phthalate, ethanol, butanol, silicone oil, methyl silicone oil, sorbitol fatty acid ester, benzotriazole, benzotriazole derivative, imidazoline derivative, alkenyl succinic acid, alkenyl succinic acid ester or zinc naphthenate.

5. The long acting thixotropic rust preventive oil composition according to claim 4, characterized by, The auxiliary rust inhibitor is at least one of sorbitol fatty acid ester or alkenyl succinic acid, and when the auxiliary rust inhibitor is both sorbitol fatty acid ester and alkenyl succinic acid, the mass ratio of sorbitol fatty acid ester to alkenyl succinic acid is 1:

1.

6. The long acting thixotropic rust preventive oil composition according to claim 5, characterized by, The sorbitol fatty acid ester is Span 80.

7. The long acting thixotropic rust preventive oil composition according to claim 6, characterized by, The alkenyl succinic acid is dodecenyl succinic acid.

8. The long-lasting thixotropic rust preventive oil composition according to claim 1, characterized by The antioxidant is any one of phenolic antioxidant, aniline antioxidant or enoic acid antioxidant.

9. The long acting thixotropic rust preventive oil composition according to claim 8, characterized by, The antioxidant is phenolic antioxidant.

10. The long acting thixotropic rust preventive oil composition according to claim 9, characterized by, The phenolic antioxidant is 2,6-di-tert-butyl-p-cresol.

11. The long-lasting thixotropic rust preventive oil composition according to claim 1, characterized by The film forming agent is any one of vaseline, paraffin, oxidized paraffin, oil-soluble asphalt, phenolic resin, rosin, terpene resin, polyolefin resin, ethylene-propylene rubber, aromatic petroleum resin, lanolin or lanolin soap.

12. The long-lasting thixotropic rust preventive oil composition according to claim 11, characterized by The film forming agent is any one of oxidized paraffin or lanolin.

13. The method of making the long-lasting thixotropic rust preventive oil composition according to any one of claims 1 to 12, characterized in that, Specifically, the following steps are implemented: Step 1, according to the mass fraction, the following components are composed: base oil 70-95 parts, rust inhibitor 5-15 parts, auxiliary rust inhibitor 1-5 parts, antioxidant 0.1-1 part, thixotropic agent 1-20 parts, film forming agent 1-5 parts; Step 2, the base oil weighed in step 1 is added to the stirring kettle for heating and stirring, and the heating temperature is 70-80℃; Step 3, the film forming agent weighed in step 1 is added to the base oil stirred in step 2 for constant temperature stirring to obtain mixture A, the constant temperature is 60-70℃, the stirring time is 0.2-2h, and the stirring frequency is greater than 500r / min; Step 4, after adding the thixotropic agent, the anti-rust agent, the auxiliary anti-rust agent and the antioxidant weighed in step 1 into the mixture A obtained in step 3, constant temperature stirring is carried out to obtain mixture B, the constant temperature is 50-60℃, the stirring time is 1-4h, and the stirring frequency is greater than 1000r / min; Step 5, the mixture B obtained in step 4 is filtered by using an 800-300 mesh filter bag, and the filtrate is the long-acting thixotropic anti-rust oil composition.

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