A kind of anti-corrosion special offshore gear oil and preparation method thereof

Abstract

The present invention belongs to the technical field of lubricating oils, and specifically relates to a corrosion-resistant special offshore gear oil and a preparation method thereof. Specifically, it is composed of the following components: 0.01% to 0.2% of a metal deactivator is selected from one or more of N, N'-di-n-butylaminomethylene benzotriazole, methyl benzotriazole, 2-mercaptobenzothiazole, thiadiazole polysulfide and 2,5-dimercapto-1,3,4-thiadiazole; 0.001% to 0.04% of methyl silicone oil; 3% to 5% of an antioxidant; 0.2% to 2% of a friction modifier is selected from one of 1,4-naphthalene dicarboxylic acid-based Cu-MOF nanomaterials or 6-sulfonic acid-1,4-naphthalene dicarboxylic acid-based Cu-MOF nanomaterials; 10% to 30% of a polyol ester; and the remainder is a poly-alpha-olefin base oil. The special gear oil of the present invention is simple to prepare, and has good lubrication properties while having anti-corrosion properties.

Description

Technical Field

[0001] The invention belongs to the technical field of lubricating oils, and in particular relates to an anti-corrosion special offshore gear oil and a preparation method thereof. Background Art

[0002] The main functions of gear oil include reducing friction between gears and bearings, preventing wear and corrosion, and assisting heat dissipation. Gear transmission is one of the core modes of mechanical transmission, and its transmission of motion and power depends on the mutual meshing of gears. In this process, friction is inevitable. Therefore, in order to extend the service life of gears, lubricating oil is needed to reduce friction on the tooth surface and carry external loads. Lubricating oil forms a protective film on the tooth surface to reduce friction and bear loads.

[0003] Ships, offshore wind turbines and other machinery are operating at sea for a long time, and it is easy for water and salt spray to mix into the lubrication system, causing the lubricant to fail, which in turn endangers normal navigation or work. In order to ensure that the lubricant still has good lubrication performance under high humidity and high salt spray conditions, a suitable additive is urgently needed to make the lubricant adapt to extreme conditions on the ocean. Summary of the invention

[0004] In order to solve the defects of the prior art, the present invention provides an anti-corrosion special offshore gear oil, which is composed of the following components by mass fraction:

[0005] 0.01% to 0.2% of the metal deactivator is selected from one or more of N,N'-di-n-butylaminomethylenebenzotriazole, methylbenzotriazole, 2-mercaptobenzothiazole, thiadiazole polysulfide and 2,5-dimercapto-1,3,4-thiadiazole;

[0006] 0.001%~0.04% methyl silicone oil;

[0007] 3% to 5% antioxidant;

[0008] 0.2% to 2% of the friction modifier is selected from one of 1,4-naphthalene dicarboxylic acid-based Cu-MOF nanomaterials or 6-sulfonic acid-1,4-naphthalene dicarboxylic acid-based Cu-MOF nanomaterials;

[0009] 10% to 30% polyol ester;

[0010] The balance is polyalphaolefin base oil.

[0011] Furthermore, the metal deactivator is selected from N,N'-di-n-butylaminomethylenebenzotriazole.

[0012] Furthermore, the friction modifier is selected from 1,4-naphthalene dicarboxylic acid-based Cu-MOF nanomaterials.

[0013] Furthermore, the mass fraction of the 1,4-naphthalene dicarboxylic acid-based Cu-MOF nanomaterial is 1%.

[0014] Furthermore, the preparation method of the 1,4-naphthalene dicarboxylic acid-based Cu-MOF nanomaterial is: Cu(NO3)2·3H2O, 1,4-naphthalene dicarboxylic acid and triethylenediamine are added to DMF, the obtained mixed solution is stirred at room temperature for 24 hours, and then centrifuged to obtain a precipitate, the precipitate is washed three times with DMF, and then washed three times with ethanol, and then dried in an oven at 100°C for 12 hours.

[0015] Furthermore, the friction modifier is selected from 6-sulfonic acid-1,4-naphthalene dicarboxylic acid-based Cu-MOF nanomaterials.

[0016] Furthermore, the mass fraction of the 6-sulfonic acid-1,4-naphthalene dicarboxylic acid Cu-MOF nanomaterial is 1%.

[0017] Furthermore, the preparation method of the self-6-sulfonic acid-1,4-naphthalene dicarboxylic acid Cu-MOF nanomaterial is: Cu(NO3)2·3H2O, 6-sulfonic acid-1,4-naphthalene dicarboxylic acid and triethylenediamine are added to DMF, the obtained mixed solution is stirred at room temperature for 24 hours, and then centrifuged to obtain a precipitate, the precipitate is washed three times with DMF, and then washed three times with ethanol, and then dried in an oven at 100°C for 12 hours.

[0018] Furthermore, the polyalphaolefin base oil is selected from one of PAO6, PAO8, PAO10, PAO25, PAO40, PAO100, PAO150 and PAO300; and the antioxidant is selected from one of 2,6-di-tert-butyl-p-cresol and 2,6-di-tert-butylphenol.

[0019] Furthermore, the present invention also provides a method for preparing an anti-corrosion special offshore gear oil, comprising the following steps: heating a poly-alpha-olefin base oil to 50°C, adding polyisobutylene, stirring at 50°C for 10 minutes, then adding a metal deactivator and methyl silicone oil, stirring for 10 minutes, and finally adding a friction modifier, stirring for 10 minutes to obtain an anti-corrosion special offshore gear oil.

[0020] Compared with the prior art, the present invention has the following advantages and beneficial effects: the anti-corrosion special offshore gear oil provided by the present invention can have both low friction and good anti-corrosion ability when a friction modifier with a specific structure is selected and used in combination with other components. At the same time, the preparation method is simple and is suitable for use as a special offshore gear oil. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments. The illustrative embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0022] Example 1

[0023] This embodiment provides an anti-corrosion special offshore gear oil and a preparation method thereof, which comprises the following components by mass:

[0024] 3% 2,6-di-tert-butyl-p-cresol, 0.05% N,N'-di-n-butylaminomethylenebenzotriazole, 0.02% methyl silicone oil, 0.2% 6-sulfonic acid-1,4-naphthalene dicarboxylic acid Cu-MOF nanomaterials, 10% to 30% polyol ester, and the remainder is poly-alpha-olefin base oil PAO100.

[0025] The preparation method is as follows: heat the polyalphaolefin base oil PAO100 to 50°C, add polyol ester, stir at 50°C for 10 minutes, then add N,N'-di-n-butylaminomethylenebenzotriazole, 2,6-di-tert-butyl-p-cresol, and methyl silicone oil, stir for 10 minutes, finally add 6-sulfonic acid-1,4-naphthalene dicarboxylic acid Cu-MOF nanomaterial, stir for 10 minutes, filter with a 100-300 mesh filter to obtain an anti-corrosion type special offshore gear oil.

[0026] The preparation method of 6-sulfonic acid-1,4-naphthalene dicarboxylic acid-based Cu-MOF nanomaterials is as follows: 2.41 g Cu(NO3)2·3H2O, 1.54 g 1,4-naphthalene dicarboxylic acid and 0.40 g triethylenediamine are added to 200 g DMF, the obtained mixed solution is stirred at room temperature for 24 h, and then centrifuged to obtain a precipitate, the precipitate is washed three times with DMF, then washed three times with ethanol, and then dried in an oven at 100°C for 12 h.

[0027] The polyol ester is composed of diol fatty acid ester, dipentaerythritol ester, polyglycol benzoate and glycerol triacetate in a mass ratio of 1:27:30:2.

[0028] Example 2

[0029] This embodiment provides an anti-corrosion special offshore gear oil and a preparation method thereof, which comprises the following components by mass:

[0030] 3% 2,6-di-tert-butyl-p-cresol, 0.05% N,N'-di-n-butylaminomethylenebenzotriazole, 0.02% methyl silicone oil, 0.7% 6-sulfonic acid-1,4-naphthalene dicarboxylic acid Cu-MOF nanomaterial, and the remainder is poly-alpha-olefin base oil PAO100.

[0031] The preparation method is the same as Example 1.

[0032] Example 3

[0033] This embodiment provides an anti-corrosion special offshore gear oil and a preparation method thereof, which comprises the following components by mass:

[0034] 3% 2,6-di-tert-butyl-p-cresol, 0.05% N,N'-di-n-butylaminomethylenebenzotriazole, 0.02% methyl silicone oil, 1.0% 6-sulfonic acid-1,4-naphthalene dicarboxylic acid Cu-MOF nanomaterial, 10% to 30% polyol ester, and the remainder is poly-alpha-olefin base oil PAO100.

[0035] The preparation method is the same as Example 1.

[0036] Example 4

[0037] This embodiment provides an anti-corrosion special offshore gear oil and a preparation method thereof, which comprises the following components by mass:

[0038] 3% 2,6-di-tert-butyl-p-cresol, 0.05% N,N'-di-n-butylaminomethylenebenzotriazole, 0.02% methyl silicone oil, 1.5% 6-sulfonic acid-1,4-naphthalene dicarboxylic acid Cu-MOF nanomaterials, 10% to 30% polyol ester, and the remainder is poly-alpha-olefin base oil PAO100.

[0039] The preparation method is the same as Example 1.

[0040] Example 5

[0041] This embodiment provides an anti-corrosion special offshore gear oil and a preparation method thereof, which comprises the following components by mass:

[0042] 3% 2,6-di-tert-butyl-p-cresol, 0.05% N,N'-di-n-butylaminomethylenebenzotriazole, 0.02% methyl silicone oil, 2.0% 6-sulfonic acid-1,4-naphthalene dicarboxylic acid Cu-MOF nanomaterials, 10% to 30% polyol ester, and the remainder is poly-alpha-olefin base oil PAO100.

[0043] The preparation method is the same as Example 1.

[0044] Example 6

[0045] This embodiment provides an anti-corrosion special offshore gear oil and a preparation method thereof, which comprises the following components by mass:

[0046] 3% 2,6-di-tert-butyl-p-cresol, 0.05% N,N'-di-n-butylaminomethylenebenzotriazole, 0.02% methyl silicone oil, 0.2% 1,4-naphthalene dicarboxylic acid-based Cu-MOF nanomaterials, 10% to 30% polyol esters, and the remainder is polyalphaolefin base oil PAO100.

[0047] The preparation method is as follows: heat the polyalphaolefin base oil PAO100 to 50°C, add polyisobutylene, stir at 50°C for 10 minutes, then add N,N'-di-n-butylaminomethylenebenzotriazole, 2,6-di-tert-butyl-p-cresol, and methyl silicone oil, stir for 10 minutes, finally add 1,4-naphthalene dicarboxylic acid-based Cu-MOF nanomaterial, stir for 10 minutes, filter with a 100-300 mesh filter to obtain an anti-corrosion type special offshore gear oil.

[0048] The preparation method of the 1,4-naphthalene dicarboxylic acid-based Cu-MOF nanomaterial is as follows: 2.41 g Cu(NO3)2·3H2O, 1.54 g 1,4-naphthalene dicarboxylic acid and 0.4 g triethylenediamine are added to 200 g DMF, the obtained mixed solution is stirred at room temperature for 24 hours, and then centrifuged to obtain a precipitate, the precipitate is washed three times with DMF, and then washed three times with ethanol, and then dried in an oven at 100°C for 12 hours.

[0049] Example 7

[0050] This embodiment provides an anti-corrosion special offshore gear oil and a preparation method thereof, which comprises the following components by mass:

[0051] 3% 2,6-di-tert-butyl-p-cresol, 0.05% N,N'-di-n-butylaminomethylenebenzotriazole, 0.02% methyl silicone oil, 1.0% 1,4-naphthalene dicarboxylic acid-based Cu-MOF nanomaterials, 10% to 30% polyol esters, and the remainder is poly-alpha-olefin base oil PAO100.

[0052] The preparation method is the same as Example 6.

[0053] Example 8

[0054] This embodiment provides an anti-corrosion special offshore gear oil and a preparation method thereof, which comprises the following components by mass:

[0055] 3% 2,6-di-tert-butyl-p-cresol, 0.05% N,N'-di-n-butylaminomethylenebenzotriazole, 0.02% methyl silicone oil, 2.0% 1,4-naphthalene dicarboxylic acid-based Cu-MOF nanomaterials, and the remainder is poly-alpha-olefin base oil PAO100.

[0056] The preparation method is the same as Example 6.

[0057] Comparative Example 1

[0058] This embodiment provides an anti-corrosion special offshore gear oil and a preparation method thereof, which comprises the following components by mass:

[0059] 3% 2,6-di-tert-butyl-p-cresol, 0.05% N,N'-di-n-butylaminomethylenebenzotriazole, 0.02% methyl silicone oil, 2.0% 2-nitroterephthalic acid-based Cu-MOF nanomaterials, 10% to 30% polyol esters, and the remainder is polyalphaolefin base oil PAO100.

[0060] Heat the polyalphaolefin base oil PAO100 to 50°C, add polyol ester, stir at 50°C for 10 minutes, then add N,N'-di-n-butylaminomethylenebenzotriazole, 2,6-di-tert-butyl-p-cresol, and methyl silicone oil, stir for 10 minutes, finally add 2-nitroterephthalic acid-based Cu-MOF nanomaterial, stir for 10 minutes, filter with a 100-300 mesh filter to obtain an anti-corrosion special offshore gear oil.

[0061] The preparation method of the 2-nitroterephthalic acid-based Cu-MOF nanomaterial is as follows: 2.41g Cu(NO3)2·3H2O, 1.56g 2-nitroterephthalic acid and 0.4g triethylenediamine are added to 200g DMF, the obtained mixed solution is stirred at room temperature for 24h, then centrifuged to obtain a precipitate, the precipitate is washed three times with DMF, then washed three times with ethanol, and then dried in an oven at 100°C for 12h.

[0062] Comparative Example 2

[0063] This embodiment provides an anti-corrosion special offshore gear oil and a preparation method thereof, which comprises the following components by mass:

[0064] 3% 2,6-di-tert-butyl-p-cresol, 0.05% N,N'-di-n-butylaminomethylenebenzotriazole, 0.02% methyl silicone oil, 2.0% 2-aminoterephthalic acid-based Cu-MOF nanomaterials, 10% to 30% polyol esters, and the remainder is polyalphaolefin base oil PAO100.

[0065] Heat the polyalphaolefin base oil PAO100 to 50°C, add polyol ester, stir at 50°C for 10 minutes, then add N,N'-di-n-butylaminomethylenebenzotriazole, 2,6-di-tert-butyl-p-cresol, and methyl silicone oil, stir for 10 minutes, finally add 2-aminoterephthalic acid-based Cu-MOF nanomaterial, stir for 10 minutes, filter with a 100-300 mesh filter to obtain an anti-corrosion special offshore gear oil.

[0066] The synthesis method of the 2-aminoterephthalic acid-based Cu-MOF nanomaterial is:

[0067] 2.41 g Cu(NO3)2·3H2O, 1.34 g 2-aminoterephthalic acid and 0.4 g triethylenediamine were added to 200 g DMF, and the obtained mixed solution was stirred at room temperature for 24 h, and then centrifuged to obtain a precipitate. The precipitate was washed three times with DMF, then washed three times with ethanol, and then dried in an oven at 100°C for 12 h.

[0068] Comparative Example 3

[0069] This embodiment provides an anti-corrosion special offshore gear oil and a preparation method thereof. The difference compared with Example 1 is that no 6-sulfonic acid-1,4-naphthalene dicarboxylic acid Cu-MOF nanomaterial is added, and the other components and corresponding preparation methods are the same.

[0070] Test Example 1

[0071] The lubricating oil prepared in each embodiment and comparative example was mixed with deionized water at a mass ratio of 9:1, and then a friction test was performed. The friction test method was to use a CFT-1 material surface performance comprehensive tester for measurement, using a disc-pin reciprocating linear motion mode, the disc and the pin were made of HT200 gray cast iron, the disc diameter was 30 mm, the pin diameter was 4 mm, the reciprocating stroke was 10 mm, the friction time was 45 min, the room temperature was 25°C, and the load was constant at 100N.

[0072] The anti-corrosion test method is as follows: the gear oil prepared in each embodiment and comparative example and concentrated sulfuric acid (98%) are mixed in a mass ratio of 9:1, and then the Q235 steel plate, after the surface is polished with sandpaper, is immersed in a mixed solution of gear oil and concentrated sulfuric acid (98%). After immersion for 30 days, the surface of the sample is observed to see whether there are bubbles, cracks, or rust.

[0073] The test results are shown in Table 1 below.

[0074] Table 1. Friction and corrosion resistance experimental test results.

[0075]

[0076]

[0077] As can be seen from Table 1, when different ligands are added, the anti-corrosion performance of Cu-MOF nanomaterials is improved relative to the base oil. However, different ligands of Cu-MOF nanomaterials have a greater impact on friction, such as 2-nitroterephthalic acid and 2-aminoterephthalic acid in Comparative Examples 1 and 2 have little effect on friction. When the structure containing naphthalene is used as a ligand in the ligand, the friction is reduced, and when the ligand contains naphthalene and sulfonic acid groups, the friction is further reduced.

Claims

1. A corrosion-resistant offshore gear oil, characterized in that: The composition is composed of the following components by mass fraction: 0.01% to 0.2% of one or more metal deactivators selected from N, N'-di-n-butylaminomethylenebenzotriazole, methylbenzotriazole, 2-mercaptobenzothiazole, thiadiazole polysulfide and 2,5-dimercapto-1,3,4-thiadiazole; 0.001% to 0.04% of methyl silicone oil; 3% to 5% of antioxidant; 0.2% to 2% of friction modifier selected from 6-sulfonic acid-1,4-naphthalene dicarboxylic acid Cu-MOF nanomaterials; 10% to 30% of polyol ester; the remainder is poly-alpha-olefin base oil; the polyol ester is composed of diol fatty acid ester, dipentaerythritol ester, polyglycol benzoate and glycerol triacetate in a mass ratio of 1:27:30:2; The preparation method of the 6-sulfonic acid-1,4-naphthalene dicarboxylic acid-based Cu-MOF nanomaterial is as follows: Cu(NO3)2·3H2O, 6-sulfonic acid-1,4-naphthalene dicarboxylic acid and triethylenediamine are added to DMF, the obtained mixed solution is stirred at room temperature for 24 hours, and then centrifuged to obtain a precipitate, the precipitate is washed three times with DMF, and then washed three times with ethanol, and then dried in an oven at 100°C for 12 hours.

2. The anti-corrosion special offshore gear oil according to claim 1, characterized in that: The metal deactivator is selected from N,N'-di-n-butylaminomethylenebenzotriazole.

3. The anti-corrosion special offshore gear oil according to claim 1, characterized in that: The mass fraction of the 6-sulfonic acid-1,4-naphthalene dicarboxylic acid Cu-MOF nanomaterial is 1%.

4. The anti-corrosion special offshore gear oil according to claim 1, characterized in that: The polyalphaolefin base oil is selected from one of PAO6, PAO8, PAO10, PAO25, PAO40, PAO100, PAO150 and PAO300; and the antioxidant is selected from 2,6-di-tert-butyl-p-cresol.

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