Antiseptic fat and its preparation method and application

Abstract

The application provides a kind of anticorrosive grease and its preparation method and application, belong to anticorrosive grease technical field.The application will be mixed with plasticizer after trimellitate and poly-alpha olefin are compounded as base oil, can avoid the phenomenon that trimellitate does not melt, can also exert the biodegradability of ester oil and the high temperature stability and excellent low temperature tendency of poly-alpha olefin;Add antioxidant to improve the antioxidant property of anticorrosive grease;Add rust inhibitor to improve the rust-proof performance of anticorrosive grease;Add dispersant to improve the dispersibility of gel agent;The composition of anticorrosive grease and the amount of each component are controlled, so that the anticorrosive grease has certain biodegradability, excellent high and low temperature performance, oxidation stability and corrosion resistance.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of anticorrosive grease and specifically relates to an anticorrosive grease as well as a preparation method and application thereof. BACKGROUND

[0002] An overhead conductor is a conductor used for overhead power transmission lines. Since the overhead conductor is exposed to the atmosphere for a long time, it will be eroded by rain, salt mist and other substances, and is usually coated with anticorrosive grease to improve the corrosion resistance of the overhead conductor. At present, the overhead conductor anticorrosive grease is mainly composed of mineral-based base oil and corrosion inhibitor, but it does not have biodegradability, can cause harm to the environment, and has poor high-low temperature performance, oxidation stability and corrosion resistance, thereby limiting its application. Therefore, there is an urgent need for an anticorrosive grease with biodegradability, excellent high-low temperature performance, oxidation stability and corrosion resistance. SUMMARY

[0003] The application aims to provide an anticorrosive grease as well as a preparation method and application thereof. The anticorrosive grease provided by the application has certain biodegradability, excellent high-low temperature performance, oxidation stability and corrosion resistance.

[0004] In order to achieve the above-mentioned application purposes, the application provides the following technical solutions.

[0005] The application provides an anticorrosive grease, which comprises the following components in parts by mass: base oil 50-85 parts, plasticizer 5-10 parts, gelling agent 5-15 parts, rust inhibitor 1-7 parts, dispersant 0.5-2 parts, structure stabilizer 0.4-1 part and antioxidant 0.1-1.5 parts; the base oil comprises trimellitate and poly-alpha olefin.

[0006] Preferably, the mass ratio of trimellitate to poly-alpha olefin in the base oil is (1-1.5):1.

[0007] Preferably, the plasticizer is hydrogenated styrene isoprene copolymer.

[0008] Preferably, the gelling agent is hydrophobic nano fumed silica.

[0009] Preferably, the rust inhibitor comprises oxidized wax and oleoyl sarcosine; the mass ratio of the oxidized wax to the oleoyl sarcosine is 1:(2-5).

[0010] Preferably, the dispersant is n-octyl triethoxysilane.

[0011] Preferably, the structure stabilizer is t-butyl peroxybenzoate.

[0012] Preferably, the antioxidant comprises an amine antioxidant and a phenolic antioxidant; the mass ratio of the amine antioxidant and the phenolic antioxidant is 1:(1-2).

[0013] The application further provides a preparation method of the anticorrosive grease.

[0014] (1) mixing the plasticizer and the poly-alpha-olefin to obtain a mixed solution;

[0015] (2) mixing the mixed solution obtained in the step (1) with the trimellitate ester, the gelling agent, the dispersant, the rust inhibitor, the structure stabilizer and the antioxidant to obtain the anticorrosive grease.

[0016] The application further provides application of the anticorrosive grease or the anticorrosive grease prepared by the preparation method in overhead conductor anticorrosion.

[0017] The application provides an anticorrosive grease, which comprises the following components in parts by mass: 50-85 parts of base oil, 5-10 parts of plasticizer, 5-15 parts of gelling agent, 1-7 parts of rust inhibitor, 0.5-2 parts of dispersant, 0.4-1 part of structure stabilizer and 0.1-1.5 parts of antioxidant; the base oil comprises trimellitate ester and poly-alpha-olefin. The trimellitate ester and the poly-alpha-olefin are compounded as the base oil, so that the phenomenon that the trimellitate ester is not mixed with the plasticizer can be avoided, meanwhile, the biodegradability of the ester oil and the high-temperature stability and excellent low-temperature tendency of the poly-alpha-olefin can be achieved; the antioxidant is added to improve the oxidation resistance of the anticorrosive grease; the rust inhibitor is added to improve the rust resistance of the anticorrosive grease; the dispersant is added to improve the dispersibility of the gelling agent; the composition of the anticorrosive grease and the amount of each component are controlled, so that the anticorrosive grease has certain biodegradability, excellent high-low temperature performance, oxidation stability and anticorrosive performance. The results of the examples show that the anticorrosive grease provided by the application has excellent high-temperature stability and low-temperature adhesion. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a high-temperature stability test diagram of the anticorrosive grease of Example 1;

[0019] Figure 2 It is a high-temperature stability test diagram of the anticorrosive grease of Example 2;

[0020] Figure 3 It is a high-temperature stability test diagram of the anticorrosive grease of Example 3;

[0021] Figure 4 It is a high-temperature stability test diagram of the anticorrosive grease of Example 4;

[0022] Figure 5 It is a low-temperature adhesion test diagram of the anticorrosive grease of Example 1;

[0023] Figure 6 Low temperature adhesion test chart for the preservative fat of Example 2;

[0024] Figure 7 Low temperature adhesion test chart for the preservative fat of Example 3;

[0025] Figure 8 Low temperature adhesion test chart for the preservative fat of Example 4;

[0026] Figure 9 Corrosion test result chart for the preservative fat of Example 1;

[0027] Figure 10 Corrosion test result chart for the preservative fat of Example 2;

[0028] Figure 11 Corrosion test result chart for the preservative fat of Example 3;

[0029] Figure 12 Corrosion test result chart for the preservative fat of Example 4. DETAILED DESCRIPTION

[0030] The present application provides a preservative fat, comprising the following components in parts by mass: base oil 50-85 parts, plasticizer 5-10 parts, gelling agent 5-15 parts, antirust agent 1-7 parts, dispersant 0.5-2 parts, structure stabilizer 0.4-1 part and antioxidant 0.1-1.5 parts.

[0031] The preservative fat provided by the present application comprises base oil 50-85 parts by mass. In the embodiments of the present application, the amount of the base oil can be specifically 50 parts, 55 parts, 60 parts, 65 parts, 70 parts, 75 parts, 80 parts or 85 parts.

[0032] In the present application, the base oil comprises trimellitate ester and poly-alpha olefin (PAO).

[0033] In the present application, the mass ratio of trimellitate ester and poly-alpha olefin in the base oil is preferably (1-1.5):1. In the embodiments of the present application, the mass ratio of trimellitate ester and poly-alpha olefin in the base oil can be specifically 1:1, 1.1:1, 1.2:1, 1.3:1, 1.4:1 or 1.5:1. The present application uses ester oil and PAO in combination, which can avoid the phenomenon that trimellitate ester does not melt with plasticizer, and at the same time, can fully exert the biodegradability of ester oil and the high-temperature stability and excellent low-temperature tendency of PAO. The present application controls the types and amounts of base oil within the above range, which can further improve the various performances of the preservative fat.

[0034] The source of the trimellitate and the poly-alpha olefin is not particularly limited in the present application, and commercially available products known to those skilled in the art can be used. In the embodiments of the present application, the trimellitate is specifically produced by Yingkou Xinghui Chemical Co., Ltd., and the code is TM320B, the kinematic viscosity at 40℃ is 320.0mm 2 / s, the kinematic viscosity at 100℃ is 32.0mm 2 / s, the viscosity index (VI) is 140, the pour point is -35℃, the open flash point is 280℃, and the acid value is 0.05mgKOH / g; and the poly-alpha olefin is specifically PAO40 produced by Lanzhou PetroChina Lubricant Additive Co., Ltd., the kinematic viscosity at 40℃ is 407.4mm 2 / s, the kinematic viscosity at 100℃ is 39.84mm 2 / s, the viscosity index (VI) is 147, the pour point is -36℃, the open flash point is 282℃, the acid value is 0.01mgKOH / g, and the density (20℃) is 0.849g / cm 3 .

[0035] The anti-corrosion grease provided by the present application further comprises a plasticizer in an amount of 5-10 parts based on 50-85 parts of the base oil. In the embodiments of the present application, the amount of the plasticizer can be specifically 5 parts, 6 parts, 7 parts, 8 parts, 9 parts or 10 parts.

[0036] In the present application, the plasticizer is preferably a hydrogenated styrene isoprene copolymer. The hydrogenated styrene isoprene copolymer in the present application is a linear hydrogenated block copolymer, which is composed of a polystyrene segment (hard segment) and a hydrogenated poly-conjugated diene segment (soft segment). The polystyrene segment has poor compatibility with most base oils, while the soft segment has good solubility in base oil. At lower temperatures, such amphiphilic linear VM molecules form micelles in oil, thereby having good low-temperature performance, as well as good weather resistance and heat resistance. Controlling the type and amount of the plasticizer within the above range can further improve the performance of the anti-corrosion grease.

[0037] The source of the plasticizer is not particularly limited in the present application, and commercially available products known to those skilled in the art can be used. In the embodiments of the present application, the hydrogenated styrene isoprene copolymer is specifically M7401 produced by Zhejiang Zhongli Synthetic Materials Technology Co., Ltd., the styrene / butadiene mass ratio is 37:63, the specific gravity is 0.91g / cc, the volatile content is 0.27wt%, the ash content is 0.1wt%, and the toluene solution viscosity (30℃, 15wt%) is 720mPa·S.

[0038] The anti-corrosion grease provided by the present application further comprises a gelling agent in an amount of 5-15 parts, based on the mass of the base oil in an amount of 50-85 parts.

[0039] In the present application, the gelling agent is preferably hydrophobic fumed silica. In the present application, the hydrophobic fumed silica is modified from hydrophilic fumed silica and has outstanding hydrophobic properties, which can significantly improve the structural stability of the product in a humid environment. By controlling the type and amount of the gelling agent within the above range, the present application can further improve the various performances of the anti-corrosion grease.

[0040] The present application does not have special limitations on the source of the gelling agent, and commercially available products known to those skilled in the art can be used. In the embodiments of the present application, the gelling agent is specifically hydrophobic fumed silica produced by Hubei Hui Fu Nanometer Material Co., Ltd., with the code HB-630, which is a hydrophobic fumed silica treated by hexamethyldisilazane (HMDS) from hydrophilic fumed silica; the dry loss (dried at 105°C for 2h) is 0.3%, the ignition loss (ignited at 1000°C for 2h, based on the product dried at 105°C for 2h) is 2.8%, the silicon dioxide content (based on the product after ignition) is 99.9wt%, the carbon content (based on the product dried at 105°C for 2h) is 3.0wt%, and the total specific surface area is 152m 2 / g, and the median particle size is 10.03mm.

[0041] The anti-corrosion grease provided by the present application further comprises a rust inhibitor in an amount of 1-7 parts, based on the mass of the base oil in an amount of 50-85 parts. In the embodiments of the present application, the amount of the rust inhibitor can be specifically 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts or 7 parts.

[0042] In the present application, the rust inhibitor preferably comprises oxidized wax and oleoyl sarcosine. In the present application, the oxidized wax can form a dense rust-proof film on the surface of the workpiece, and the use of the compounded oleoyl sarcosine can more effectively improve the rust-proof performance.

[0043] In the present application, the mass ratio of the oxidized wax to the oleoyl sarcosine is preferably 1:(2-5). In the embodiments of the present application, the mass ratio of the oxidized wax to the oleoyl sarcosine can be specifically 1:2, 1:3, 1:4 or 1:5. By controlling the type and amount of the rust inhibitor within the above range, the present application can further improve the various performances of the anti-corrosion grease.

[0044] The invention does not have special limitations on the source of the oxidized wax and oleoyl sarcosine, and commercially available products known to those skilled in the art can be used. In the embodiments of the invention, the oxidized wax is specifically a rust-proof film-forming agent produced by Shanghai Yucheng Chemical Co., Ltd., with a code of RP7031, a brown solid appearance, an acid value of 31.5 mgKOH / g, and solubility in mineral oil and solvents; and the oleoyl sarcosine is specifically a multi-effect rust inhibitor produced by Shenzhen Ruxinba Chemical Material Co., Ltd., with a code of AY-Y30, an acid value of 152 mgKOH / g, a pH value of 4, and a density (20℃) of 0.96 g / cm 3 , which belongs to the ash-free system.

[0045] The anti-corrosion grease provided by the invention further comprises a dispersant in an amount of 0.5-2 parts based on 50-85 parts of the base oil. In the embodiments of the invention, the amount of the dispersant can be specifically 0.5 parts, 1 part, 1.5 parts, or 2 parts.

[0046] In the invention, the dispersant is preferably n-octyl triethoxysilane. Compared with traditional dispersants such as ethanol, the n-octyl triethoxysilane has a high flash point and is safe to use. At the same time, a small amount is needed, and it has excellent dispersibility for gelling agents. The invention controls the type and amount of the dispersant within the above range, which can further improve the performance of the anti-corrosion grease.

[0047] The invention does not have special limitations on the source of the dispersant, and commercially available products known to those skilled in the art can be used. In the embodiments of the invention, the n-octyl triethoxysilane is specifically an organosilane coupling agent produced by Jiangxi Chen Guang New Material Co., Ltd., with a code of CG-801, a molecular weight of 276.49, a specific gravity of 0.879 at 25℃, an open flash point of 100℃, and an appearance of colorless transparent liquid, and it has outstanding dispersing performance for inorganic gelling agents.

[0048] The anti-corrosion grease provided by the invention further comprises a structural stabilizer in an amount of 0.4-1 parts based on 50-85 parts of the base oil. In the embodiments of the invention, the amount of the structural stabilizer can be specifically 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, or 1 part.

[0049] In the invention, the structural stabilizer is preferably t-butyl peroxybenzoate. In the invention, the t-butyl peroxybenzoate can undergo a curing reaction with the plasticizer hydrogenated styrene isoprene copolymer at 100-140℃, thereby improving the structural stability of the product at high temperatures. The invention controls the type and amount of the structural stabilizer within the above range, which can further improve the performance of the anti-corrosion grease.

[0050] The source of the structural stabilizer is not particularly limited in the present application, and commercially available products known to those skilled in the art can be used. In the embodiments of the present application, the t-butyl peroxy benzoate is specifically Trigonox C produced by Nouryon Chemical Co., Ltd., with a crystallization point of 8℃, a density (20℃) of 1.04 g / cm 3 , and a 40℃ kinematic viscosity of 6.523 mm 2 / s.

[0051] The anti-corrosion grease provided by the present application further comprises an antioxidant in an amount of 0.1-1.5 parts based on 50-85 parts of the base oil. In the embodiments of the present application, the amount of the antioxidant can be specifically 0.1 parts, 0.3 parts, 0.5 parts, 0.8 parts, 1 part, 1.2 parts or 1.5 parts.

[0052] In the present application, the antioxidant preferably comprises an amine antioxidant and a phenolic antioxidant, and more preferably an amine antioxidant and a high molecular weight phenolic antioxidant. In the present application, the antioxidant can effectively eliminate free radicals and prevent oxidative degradation, thereby having outstanding oxidation resistance at high and low temperatures and prolonging the service life of the product.

[0053] In the present application, the mass ratio of the amine antioxidant to the phenolic antioxidant is preferably 1:(1-2). In the embodiments of the present application, the mass ratio of the amine antioxidant to the phenolic antioxidant can be specifically 1:1, 1:1.1, 1:1.2, 1:1.3, 1:1.4, 1:1.5, 1:1.6, 1:1.7, 1:1.8, 1:1.9 or 1:2. Controlling the type and amount of the antioxidant within the above range can further improve the performance of the anti-corrosion grease.

[0054] The source of the antioxidant is not particularly limited in the present application, and commercially available products known to those skilled in the art can be used. In the embodiments of the present application, the antioxidant is specifically liquid nonyl diphenylamine and a high molecular weight phenolic antioxidant produced by BASF Chemical Co., Ltd.; the liquid nonyl diphenylamine antioxidant is designated as L67, has a 40℃ kinematic viscosity of 675 mm 2 / s, a density (20℃) of 0.52 g / cm 3 , and a nitrogen content of 3.6 wt%; and the high molecular weight phenolic antioxidant is designated as L107, has a melting point of 50℃.

[0055] The present application controls the composition and the amount of each component of the anti-corrosion grease, so that the anti-corrosion grease has certain biodegradability, excellent high and low temperature performance, oxidation stability and corrosion resistance.

[0056] The present application further provides a preparation method of the anti-corrosion grease described in the above technical solution, comprising the following steps:

[0057] (1) mixing the plasticizer and the poly-alpha-olefin to obtain a mixed solution;

[0058] (2) mixing the mixed solution obtained in step (1) with trimellitate, gelling agent, dispersant, anti-rust agent, structure stabilizer and antioxidant to obtain the corrosion-resistant grease.

[0059] The present application mixes the plasticizer and the poly-alpha-olefin to obtain a mixed solution.

[0060] In the present application, the mixing of the plasticizer and the poly-alpha-olefin is preferably: adding the plasticizer to the poly-alpha-olefin at room temperature, stirring for 20-40 min, then heating to 120-130℃ at a heating rate of 60-80℃ / min, and keeping at 120-130℃ for 50-70 min; more preferably: adding the plasticizer to the poly-alpha-olefin at room temperature, stirring for 30 min, then heating to 120-130℃ at a heating rate of 70℃ / min, and keeping at 120-130℃ for 60 min.

[0061] After obtaining the mixed solution, the present application mixes the mixed solution with trimellitate, gelling agent, dispersant, anti-rust agent, structure stabilizer and antioxidant to obtain the corrosion-resistant grease.

[0062] In the present application, the mixing of the mixed solution with trimellitate, gelling agent, dispersant, anti-rust agent, structure stabilizer and antioxidant is preferably: adding the trimellitate to the mixed solution at 70-90℃ and stirring until uniform, then sequentially adding the gelling agent and the dispersant, stirring at 400-500 r / min for 20-40 min, cyclic shearing at 0.8-1.2 MPa for 1-2 h, depressurizing, adding the anti-rust agent, the structure stabilizer and the antioxidant, cyclic stirring for 10-30 min, cyclic shearing at 0.8-1.2 MPa for 20-40 min, and depressurizing; more preferably: adding the trimellitate to the mixed solution at 80℃ and stirring until uniform, then sequentially adding the gelling agent and the dispersant, stirring at 400-500 r / min for 30 min, cyclic shearing at 1 MPa for 1.5 h, depressurizing, adding the anti-rust agent, the structure stabilizer and the antioxidant, cyclic stirring for 20 min, cyclic shearing at 1 MPa for 30 min, and depressurizing.

[0063] The preparation method of the present application can make the mixing of the components more uniform.

[0064] The present application also provides the application of the corrosion-resistant grease described in the above technical solution or the corrosion-resistant grease prepared by the preparation method described in the above technical solution in the corrosion prevention of overhead conductors.

[0065] The present application does not have special limitations on the operation of the application, and the application technical solution well known to those skilled in the art can be used.

[0066] The technical solutions in the present application will be clearly and completely described below in combination with the embodiments in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0067] Embodiment 1

[0068] A kind of anticorrosive grease, by mass fraction, consists of the following components: base oil 83.2 parts (trimellitate (TM320B) 42.2 parts, poly-alpha olefin (PAO 40) 41.0 parts, the mass ratio of trimellitate and poly-alpha olefin is 1.03:1), plasticizer (hydrogenated styrene isoprene copolymer M7401) 6 parts, gelling agent (hydrophobic nano fumed silica HB-630) 7 parts, rust inhibitor 2 parts (oxidized wax (RP7031) 0.5 parts, oleoyl sarcosine (AY-Y30) 1.5 parts, the mass ratio of oxidized wax and oleoyl sarcosine is 1:3), dispersant (n-octyl triethoxysilane CG-801) 0.8 parts, structure stabilizer (tert-butyl peroxybenzoate Trigonox C) 0.5 parts and antioxidant 0.5 parts (amine antioxidant (L67) 0.2 parts, phenolic antioxidant (L107) 0.3 parts, the mass ratio of amine antioxidant and phenolic antioxidant is 1:1.5);

[0069] The preparation method of the anticorrosive grease is: (1) at room temperature, plasticizer is added to poly-alpha olefin, stirring for 30 min, then heating to 125 DEG C at a heating rate of 70 DEG C / min, keeping at 125 DEG C for 60 min, to obtain a mixed solution;

[0070] (2) at 80 DEG C, trimellitate is added to the mixed solution and stirred uniformly, then gelling agent and dispersant are added in turn, stirring at 450 r / min for 30 min, circulating shearing at 1 MPa for 1.5 h, pressure relief, adding rust inhibitor, structure stabilizer and antioxidant, circulating stirring for 20 min, circulating shearing at 1 MPa for 30 min, pressure relief, to obtain the anticorrosive grease.

[0071] Embodiment 2

[0072] A kind of anticorrosive grease, by mass parts, it is composed of the following components: base oil 78.5 parts (trimellitate (TM320B) 43.0 parts, poly-alpha olefin (PAO 40) 35.5 parts, the mass ratio of trimellitate and poly-alpha olefin is 1.2:1), plasticizer (hydrogenated styrene isoprene copolymer M7401) 7 parts, gelling agent (hydrophobic nano fumed silica HB-630) 9 parts, rust inhibitor 2.8 parts (oxidized wax (RP7031) 0.8 parts, oleoyl sarcosine (AY-Y30) 2 parts, the mass ratio of oxidized wax and oleoyl sarcosine is 1:2.5), dispersant (n-octyl triethoxysilane CG-801) 1.0 parts, structure stabilizer (tert-butyl peroxybenzoate Trigonox C) 0.8 parts and antioxidant 0.9 parts (amine antioxidant (L67) 0.4 parts, phenolic antioxidant (L107) 0.5 parts, the mass ratio of amine antioxidant and phenolic antioxidant is 1:1.25);

[0073] The preparation method of the anticorrosive grease is same with example 1.

[0074] Example 3

[0075] A kind of anticorrosive grease, by mass parts, it is composed of the following components: base oil 74.9 parts (trimellitate (TM320B) 44.9 parts, poly-alpha olefin (PAO 40) 30.0 parts, the mass ratio of trimellitate and poly-alpha olefin is 1.5:1), plasticizer (hydrogenated styrene isoprene copolymer M7401) 8 parts, gelling agent (hydrophobic nano fumed silica HB-630) 10 parts, rust inhibitor 3.5 parts (oxidized wax (RP7031) 1 part, oleoyl sarcosine (AY-Y30) 2.5 parts, the mass ratio of oxidized wax and oleoyl sarcosine is 1:2.5), dispersant (n-octyl triethoxysilane CG-801) 1.5 parts, structure stabilizer (tert-butyl peroxybenzoate Trigonox C) 1.0 parts and antioxidant 1.1 parts (amine antioxidant (L67) 0.5 parts, phenolic antioxidant (L107) 0.6 parts, the mass ratio of amine antioxidant and phenolic antioxidant is 1:1.2);

[0076] The preparation method of the anticorrosive grease is same with example 1.

[0077] Example 4

[0078] A kind of anticorrosive grease, by mass parts, consists of the following components: base oil 72.1 parts (trimellitate (TM320B) 43.1 parts, poly-alpha olefin (PAO 40) 29 parts, the mass ratio of trimellitate and poly-alpha olefin is 1.5:1), plasticizer (hydrogenated styrene isoprene copolymer M7401) 8 parts, gelling agent (hydrophobic nano fumed silica HB-630) 11 parts, rust inhibitor 5 parts (oxidized wax (RP7031) 1.5 parts, oleoyl sarcosine (AY-Y30) 3.5 parts, the mass ratio of oxidized wax and oleoyl sarcosine is 1:2.3), dispersant (n-octyl triethoxysilane CG-801) 1.7 parts, structure stabilizer (tert-butyl peroxybenzoate Trigonox C) 1.0 part and antioxidant 1.2 parts (amine antioxidant (L67) 0.5 parts, phenolic antioxidant (L107) 0.7 parts, the mass ratio of amine antioxidant and phenolic antioxidant is 1:1.4);

[0079] The preparation method of the anticorrosive grease is the same as example 1.

[0080] The cone penetration, drop point, short-term high temperature stability, low temperature adhesion and acid value / base value of the anticorrosive grease of examples 1-4 are tested, wherein the test method of cone penetration is GB / T 362925.5.2, the test method of drop point is GB / T 362925.3, the test method of short-term high temperature stability is GB / T 362925.4, the test method of low temperature adhesion is GB / T 362925.6, and the test method of acid value / base value is GB / T 362925.7. The results are shown in Table 1. Table 1 Cone penetration, drop point, short-term high temperature stability, low temperature adhesion and acid value / base value of the anticorrosive grease of examples 1-4

[0081]

[0082]

[0083] The high temperature stability (24h) test chart of the anticorrosive grease of examples 1-4 is shown in Figures 1-4 respectively, and the low temperature adhesion (1h) test chart is shown in Figures 5-8 respectively. From the data in Table 1 and Figures 1-8 It can be seen that examples 1-4 can meet the design index, and the high temperature stability of example 3 is particularly outstanding. The increase of the amount of plasticizer and gelling agent will make the cone penetration smaller, and the increase of the amount of rust inhibitor will make the cone penetration larger. At the same time, the control of cone penetration has a greater influence on high temperature stability, and the content of plasticizer also has a certain influence on the high temperature stability of the product.

[0084] The anti-corrosion grease of examples 1-4 was subjected to aging corrosion test according to GB / T 362925.8 and GB / T 362925.9, the corrosion test series, the aging test cone penetration rate change rate and the acid value / alkali value after aging test are shown in Table 2.

[0085] Table 2 Corrosion test series, aging test cone penetration rate change rate and acid value / alkali value after aging test of the anti-corrosion grease of examples 1-4

[0086]

[0087] The corrosion test results of the anti-corrosion grease of examples 1-4 are respectively shown in Figures 9-12 . It can be seen from the data in Table 2 and Figures 9-12 that examples 1-4 can all meet the aging corrosion index. The corrosion test performance of examples 3 and 4 is particularly outstanding.

[0088] The biodegradability of the anti-corrosion grease of examples 1-4 was tested, and the results are shown in Table 3.

[0089] Table 3 Biodegradability of the anti-corrosion grease of examples 1-4

[0090] Biodegradability in % Example 1 62 Example 2 58 Example 3 63 Example 4 59

[0091] It can be seen from Table 3 that the biodegradability of the anti-corrosion grease of the present application is at a higher level compared to the biodegradability of the traditional mineral anti-corrosion grease for overhead conductor wire (generally 20-40%), which is a relatively easily degradable product. The biodegradability of the product is greatly related to the base oil and is also affected by the gel agent and the rust inhibitor. The corrosion resistance is affected by high temperature, and the selection of the gel agent needs to select silica with better high temperature resistance, but silica has certain adverse effects on biodegradability. In the selection of the rust inhibitor, the use of ash-free system in the rust inhibitor is more conducive to the improvement of biodegradability.

[0092] In summary, the anti-corrosion grease provided by the present application has excellent high and low temperature performance, corrosion resistance and good biodegradability.

[0093] The above only describes the preferred embodiments of the present application, and it should be noted that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1.A preservative grease, comprising the following components in parts by mass: base oil 50-85, plasticizer 5-10, gelling agent 5-15, anti-rust agent 1-7, dispersant 0.5-2, structure stabilizer 0.4-1 and antioxidant 0.1-1.5; the base oil comprises trimellitate and poly-alpha olefin; the plasticizer is hydrogenated styrene isoprene copolymer, which is composed of polystyrene segments and hydrogenated poly-conjugated diene segments; the gelling agent is hydrophobic nano fumed silica; the structure stabilizer is t-butyl peroxybenzoate; the mass ratio of trimellitate to poly-alpha olefin in the base oil is (1-1.5) : 1; the anti-rust agent comprises oxidized wax and oleoyl sarcosine, and the mass ratio of the oxidized wax to the oleoyl sarcosine is 1: (2-5) ; the dispersant is n-octyl triethoxysilane; and the antioxidant comprises amine antioxidant and phenolic antioxidant, and the mass ratio of the amine antioxidant to the phenolic antioxidant is 1: (1-2). 5.A preparation method of the preservative grease according to any one of claims 1-4, comprising the following steps: (1) mixing the plasticizer and poly-alpha olefin to obtain a mixed solution; and (2) mixing the mixed solution obtained in the step (1) with trimellitate, gelling agent, dispersant, anti-rust agent, structure stabilizer and antioxidant to obtain the preservative grease. 6.Use of the preservative grease according to any one of claims 1-4 or prepared by the preparation method of claim 5 in the corrosion prevention of overhead conductor. ​ ​ 2. The antiseptic fat according to claim 1, characterized in that, ​ 3. The antiseptic lipids according to claim 1, characterized in that, ​ 4. The antiseptic lipids according to claim 1, characterized in that, ​ ​ ​ ​ ​

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