Formula and production process of cable anti-corrosion grease

Abstract

The invention relates to the technical field of cable corrosion prevention, in particular to a formula and a production process of cable anti-corrosion grease. The formula of the anticorrosive grease comprises synthetic base oil, tertiary intercalation modified montmorillonite, barium petroleum sulfonate, lanolin magnesium soap, diphenylamine and benzotriazole. Wherein the tertiary intercalation modified montmorillonite is prepared by carrying out tertiary intercalation modification on 2, 3-epoxypropyl trimethyl ammonium chloride, dihexadecylamine and chlorohexadecane in sequence. Through a multistage intercalation modification process of montmorillonite, gradual optimization of an interlayer structure and remarkable improvement of lipophilicity are realized, so that the prepared cable anti-corrosion grease has excellent shear stability, extremely low oil separation rate and excellent salt spray corrosion resistance, can provide long-acting and stable protection for cables in a complex environment, and has good application prospects. The technical problems of poor stability, serious oil separation, non-lasting anti-corrosion effect and the like in the long-term use process of the traditional cable anti-corrosion grease are effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of cable anti-corrosion, and particularly relates to a formulation of a cable anti-corrosion grease and its production process. Background Art

[0002] As an important part of modern infrastructure, power and communication cables operate in various complex environments for a long time. Their anti-corrosion protection is crucial for ensuring the safe operation of equipment and extending the service life. Cable anti-corrosion grease, as a key material dedicated to the anti-corrosion of cable metal components, usually needs to possess comprehensive properties such as excellent anti-corrosion performance, suitable rheological characteristics, good shear stability, and low oil separation rate.

[0003] Traditional cable anti-corrosion grease mainly consists of base oil, thickener, and various additives. Among them, mineral oil, synthetic oil, or vegetable oil is usually selected as the base oil; metal soap, organic bentonite, polyurea, etc. are mostly used as thickeners; additives include antioxidants, preservatives, viscosity index improvers, etc. This type of traditional formulation faces multiple challenges in harsh environments: on the one hand, the long-term shear action leads to the destruction of the structure, resulting in a decrease in the consistency of the anti-corrosion grease and the loss of its original protection function; on the other hand, the compatibility between the base oil and the thickener is poor under high-temperature conditions, leading to serious oil separation phenomena, which not only pollute the surrounding environment but also greatly reduce the anti-corrosion effect.

[0004] Montmorillonite is widely used in the thickening system of lubricating grease due to its special layered structure and ion exchange ability. Natural montmorillonite has inorganic cations mainly between its layers and is hydrophilic, with poor compatibility with organic base oil. Direct use will cause problems such as uneven dispersion and poor stability. To solve this problem, researchers have developed the technology of organically modified montmorillonite, by replacing the inorganic cations between the layers with organic ammonium ions or other organic compounds to change the surface properties of montmorillonite and improve its compatibility with the organic matrix.

[0005] Traditional organically modified montmorillonite usually adopts a single intercalation modification process, that is, introducing organic ammonium ions or other organic compounds into the interlayer of montmorillonite in one step. Commonly used modifiers include alkyl ammonium salts, imidazoline compounds, etc. Although single intercalation modification can improve the lipophilicity of montmorillonite to a certain extent, the modification effect is limited, especially in terms of anti-mechanical shear stability and anti-oil precipitation. This is mainly because the interlayer structure of montmorillonite after single modification has not been fully expanded, and at the same time, a single type of modifier is difficult to simultaneously meet the requirements of compatibility with the base oil and good structural stability. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to propose a formulation of a cable anti-corrosion grease and its production process to solve the problems that traditional cable anti-corrosion grease has poor shear stability, high oil separation rate, and the anti-corrosion effect is not persistent, and cannot meet the long-term protection requirements of cables in complex environments.

[0007] For the above purposes, the present invention provides a formulation of a cable anti-corrosion grease, which includes the following components by weight: 70-90 parts of synthetic base oil, 8-16 parts of three-time intercalation modified montmorillonite, 6-10 parts of barium petroleum sulfonate, 3-6 parts of lanolin magnesium soap, 1.6-2.5 parts of diphenylamine, and 0.6-1 part of benzotriazole.

[0008] Preferably, the synthetic base oil is PAO-8 or PAO-10.

[0009] Further, the preparation steps of the three-time intercalation modified montmorillonite are as follows:

[0010] S1: Add sodium-based montmorillonite to deionized water, heat up to 82-88 °C, stir for 0.8-1.2 h, then add 2,3-epoxypropyltrimethylammonium chloride, continue to stir for 3-5 h, filter by suction, wash, and vacuum dry to obtain the once-intercalation modified montmorillonite;

[0011] S2: Add the once-intercalation modified montmorillonite to N,N-dimethylformamide, perform ultrasonic treatment for 15-25 min, then add bis(hexadecyl)amine, stir and react at room temperature for 4-6 h, filter by suction, wash, and vacuum dry to obtain the twice-intercalation modified montmorillonite;

[0012] S3: Add the twice-intercalation modified montmorillonite to N,N-dimethylformamide, perform ultrasonic treatment for 15-25 min, then add hexadecyl chloride, heat up to 78-82 °C, stir and react for 5-7 h, filter by suction, wash, vacuum dry, grind and sieve to obtain the three-time intercalation modified montmorillonite;

[0013] Preferably, the CEC of the sodium-based montmorillonite in step S1 is 70-150 mmol / 100 g.

[0014] Preferably, the weight ratio of the sodium-based montmorillonite, deionized water, and 2,3-epoxypropyltrimethylammonium chloride in step S1 is 10-20:1000-2000:3.2-6.5.

[0015] Preferably, the weight ratio of the intercalation modified montmorillonite, N,N-dimethylformamide, and bis(hexadecyl)amine in step S2 is 10-20:350-650:4.5-9.5.

[0016] Preferably, the weight ratio of the twice-intercalation modified montmorillonite, N,N-dimethylformamide, and hexadecyl chloride in step S3 is 10-20:350-650:0.6-1.8.

[0017] Preferably, the mesh number of the grind and sieve in step S3 is 100-300 meshes.

[0018] Furthermore, the present invention also provides a production process for cable anti-corrosion grease, which includes the following steps: Add synthetic base oil into a reaction kettle, start stirring at a stirring speed of 150 - 250 rpm, heat up to 60 - 70 °C and maintain for 10 - 20 min, add three - time intercalated modified montmorillonite, heat up to 80 - 90 °C, and increase the stirring speed to 400 - 600 rpm, continuously stir for 25 - 35 min, then sequentially add barium petroleum sulfonate and magnesium lanolin soap, continue stirring for 40 - 50 min, then cool down to 65 - 75 °C, sequentially add diphenylamine and benzotriazole, continue stirring for 15 - 25 min, finally add 8 - 12 g of dioctyl phthalate, perform high - pressure homogenization, and finally cool down to 38 - 42 °C, keep warm and age for 10 - 15 h to obtain the cable anti - corrosion grease.

[0019] Preferably, the high - pressure homogenization is carried out three times at 20 - 30 MPa, each time for 5 - 10 min.

[0020] The present invention uses multi - time intercalated modified montmorillonite to prepare cable anti - corrosion grease, which has significant technical advantages compared with traditional modification methods:

[0021] First, through the multi - stage intercalation modification process, the layer spacing of montmorillonite is gradually expanded to form a stable layered structure. This special interlayer structure design endows the anti - corrosion grease with excellent shear stability, enabling it to maintain a stable structure under long - term mechanical stress, effectively extending the service life of the cable anti - corrosion grease.

[0022] Second, the specific functional groups introduced during the multi - time intercalation modification process, especially the long - chain alkyl structure, significantly improve the lipophilic property of montmorillonite and enhance the molecular affinity with the base oil. This modification strategy effectively reduces the bleeding rate of the anti - corrosion grease, solves the problem of grease precipitation during the long - term use of traditional anti - corrosion grease, and ensures the use performance of the product in extreme environments.

[0023] Third, the special interface structure formed by the multi - stage modified montmorillonite and the base oil creates a more stable colloidal dispersion system, improving the rheological properties of the anti - corrosion grease. The modified montmorillonite platelets can be evenly distributed in the base oil to form a network structure, providing excellent penetration control ability, enabling the anti - corrosion grease to maintain an appropriate consistency over a wide temperature range.

[0024] Most importantly, the multi - time intercalated modified montmorillonite of the present invention significantly enhances the salt - spray corrosion resistance of the anti - corrosion grease, providing a long - term protection barrier for metal cables. Through the carefully designed interlayer structure and surface chemical modification, a multiple protection mechanism is formed, effectively blocking the penetration of moisture, oxygen and corrosive ions to the metal surface, and maintaining excellent anti - corrosion effects even in a harsh salt - spray environment.

[0025] In summary, the cable anti-corrosion grease prepared by the multiple intercalation modification method of the present invention realizes the comprehensive improvement of shear stability, oil precipitation prevention and anti-corrosion performance through structural optimization and performance regulation, providing a more reliable technical solution for cable protection in the fields of electric power, communication, etc. Detailed implementation mode

[0026] To make the purpose, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with specific embodiments.

[0027] Example 1:

[0028] (1) Add 10 g of sodium montmorillonite (CEC is 90 mmol / 100 g) to 1000 g of deionized water, heat up to 82 °C, stir for 0.8 h, then add 3.2 g of 2,3-epoxypropyltrimethylammonium chloride, continue to stir for 3 h, filter by suction, wash with deionized water 3 times, and dry in vacuum to obtain the primary intercalation modified montmorillonite;

[0029] (2) Add 10 g of the primary intercalation modified montmorillonite to 350 g of N,N-dimethylformamide, perform ultrasonic treatment for 15 min, then add 4.5 g of dihexadecylamine, stir and react at room temperature for 4 h, filter by suction, wash with ethanol 3 times, and dry in vacuum to obtain the secondary intercalation modified montmorillonite;

[0030] (3) Add 10 g of the secondary intercalation modified montmorillonite to 350 g of N,N-dimethylformamide, perform ultrasonic treatment for 15 min, then add 0.6 g of hexadecyl chloride, heat up to 78 °C, stir and react for 5 h, filter by suction, wash with ethanol 3 times, dry in vacuum, grind through a 200-mesh sieve to obtain the tertiary intercalation modified montmorillonite;

[0031] (4) Add 70 g of synthetic base oil (PAO-8) to the reaction kettle, start stirring, the stirring speed is 150 rpm, heat up to 60 °C and maintain for 10 min, add 8 - 16 g of the tertiary intercalation modified montmorillonite, heat up to 80 °C, and increase the stirring speed to 400 rpm, continue to stir for 25 min, then add 6 g of barium petroleum sulfonate and 3 g of lanolin magnesium soap in sequence, continue to stir for 40 min, then cool down to 65 °C, add 1.6 g of diphenylamine and 0.6 g of benzotriazole in sequence, continue to stir for 15 min, finally add 8 g of dioctyl phthalate, perform homogenization treatment three times at 20 MPa, 5 min each time, and finally cool down to 38 °C, keep warm and age for 10 h to obtain the cable anti-corrosion grease.

[0032] Example 2:

[0033] (1) Add 15 g of sodium montmorillonite (CEC is 90 mmol / 100 g) to 1500 g of deionized water, heat up to 85 °C, stir for 1 h, then add 5 g of 2,3-epoxypropyltrimethylammonium chloride, continue stirring for 4 h, filter by suction, wash with deionized water 3 times, and dry in vacuum to obtain the primary intercalation modified montmorillonite;

[0034] (2) Add 15 g of the primary intercalation modified montmorillonite to 500 g of N,N-dimethylformamide, perform ultrasonic treatment for 20 min, then add 7 g of bis(hexadecyl)amine, stir and react at room temperature for 5 h, filter by suction, wash with ethanol 3 times, and dry in vacuum to obtain the secondary intercalation modified montmorillonite;

[0035] (3) Add 15 g of the secondary intercalation modified montmorillonite to 500 g of N,N-dimethylformamide, perform ultrasonic treatment for 20 min, then add 1.2 g of hexadecyl chloride, heat up to 80 °C, stir and react for 6 h, filter by suction, wash with ethanol 3 times, dry in vacuum, grind through a 200-mesh sieve to obtain the tertiary intercalation modified montmorillonite;

[0036] (4) Add 80 g of synthetic base oil (PAO-8) to the reaction kettle, start stirring at a stirring speed of 200 rpm, heat up to 65 °C and maintain for 15 min, add 12 g of the tertiary intercalation modified montmorillonite, heat up to 85 °C, and increase the stirring speed to 500 rpm, continuously stir for 30 min, then sequentially add 8 g of barium petroleum sulfonate and 4.5 g of lanolin magnesium soap, continue stirring for 45 min, then cool down to 70 °C, sequentially add 2.1 g of diphenylamine and 0.8 g of benzotriazole, continue stirring for 20 min, finally add 10 g of dioctyl phthalate, perform homogenization treatment three times at 25 MPa, 8 min each time, and finally cool down to 40 °C, keep warm and age for 12 h to obtain the cable anti-corrosion grease.

[0037] Example 3:

[0038] (1) Add 20 g of sodium montmorillonite (CEC is 90 mmol / 100 g) to 2000 g of deionized water, heat up to 88 °C, stir for 1.2 h, then add 6.5 g of 2,3-epoxypropyltrimethylammonium chloride, continue stirring for 5 h, filter by suction, wash with deionized water 3 times, and dry in vacuum to obtain the primary intercalation modified montmorillonite;

[0039] (2) Add 20 g of the primary intercalation modified montmorillonite to 650 g of N,N-dimethylformamide, perform ultrasonic treatment for 25 min, then add 9.5 g of bis(hexadecyl)amine, stir and react at room temperature for 6 h, filter by suction, wash with ethanol 3 times, and dry in vacuum to obtain the secondary intercalation modified montmorillonite;

[0040] (3) Add 20 g of the secondary intercalation modified montmorillonite to 650 g of N,N-dimethylformamide, ultrasonically treat for 25 min, then add 1.8 g of hexadecyl chloride, heat up to 82 °C, stir and react for 7 h, filter by suction, wash with ethanol 3 times, dry under vacuum, grind through a 200-mesh sieve to obtain the tertiary intercalation modified montmorillonite;

[0041] (4) Add 90 g of synthetic base oil (PAO-8) to the reaction kettle, start stirring, with a stirring speed of 250 rpm, heat up to 70 °C and maintain for 20 min, add 16 g of the tertiary intercalation modified montmorillonite, heat up to 90 °C, and increase the stirring speed to 600 rpm, continuously stir for 35 min, then successively add 10 g of barium petroleum sulfonate and 6 g of lanolin magnesium soap, continue stirring for 50 min, then cool down to 75 °C, successively add 2.5 g of diphenylamine and 1 g of benzotriazole, continue stirring for 25 min, finally add 12 g of dioctyl phthalate, homogenize at 30 MPa three times, each time for 10 min, and finally cool down to 42 °C, keep warm and age for 15 h to obtain the cable anti-corrosion grease.

[0042] Comparative Example 1:

[0043] The difference between Comparative Example 1 and Example 2 is that the tertiary intercalation modified montmorillonite in step (4) is replaced with primary intercalation modified montmorillonite;

[0044] Comparative Example 2:

[0045] The difference between Comparative Example 2 and Example 2 is that the tertiary intercalation modified montmorillonite in step (4) is replaced with secondary intercalation modified montmorillonite;

[0046] Comparative Example 3:

[0047] The difference between Comparative Example 3 and Example 2 is that the dosage of hexadecyl chloride in step (3) is adjusted to 2.4 g;

[0048] Comparative Example 4:

[0049] The difference between Comparative Example 4 and Example 2 is that dihexadecylamine in step (2) is replaced with di-n-propylamine;

[0050] Comparative Example 5:

[0051] The difference between Comparative Example 5 and Example 2 is that the tertiary intercalation modified montmorillonite in step (4) is replaced with primary intercalation modified montmorillonite, and 2,3-epoxypropyltrimethylammonium chloride in step (1) is replaced with cetyltrimethylammonium chloride.

[0052] Performance test:

[0053] Penetration test: After the sample is equilibrated in a constant temperature oven at 25 ± 0.5 °C for 4 h, it is poured into a standard grease cup until it overflows. The surface is scraped flat, the cone assembly is released to free fall for 5.0 ± 0.1 s, and the measuring mechanism is immediately locked. Three measuring points are selected on the surface of the sample at a 120° angle, with the cone tip more than 6 mm away from the cup wall. The arithmetic mean of the three measured values is taken as the final penetration value, accurate to 0.1 mm. The test results are shown in Table 1.

[0054] Shear stability test: Under the condition of 25 ± 0.5 °C in a constant temperature oven, the sample is sheared continuously for 2000 times at a shear frequency of 50 times / min. After every 500 shears, the operation is paused, and the working device is rotated 180° to eliminate the influence of gravity settlement. The cumulative pause time does not exceed 15 min. After shearing is completed, the sample is immediately transferred to a standard grease cup and left to stand in an environment of 25 ± 0.5 °C for 4 ± 0.1 h. The penetration is measured, and the change rate of penetration after and before shearing is calculated and the absolute value is taken, accurate to 0.1%. The results are shown in Table 1.

[0055] Oil separation rate test: Weigh 10.00 ± 0.05 g of the sample and place it in a Φ50 mm petri dish. After covering it with a quantitative filter paper, apply a pressure of 100 kPa and place it in an oven at 100 ± 1 °C for 24 ± 0.5 h. After taking it out, weigh the mass increment of the filter paper and calculate the oil separation rate according to the formula: Oil separation rate (%) = (filter paper weight gain / initial mass of the sample) × 100, accurate to 0.1%. The results are shown in Table 1.

[0056] Salt spray corrosion test: According to GB / T 1771-2023, after a Q235 steel test piece of 30 × 50 × 1 mm is cleaned with acetone and ground with sandpaper step by step until Ra ≤ 0.8 μm, an anti-corrosion grease layer with a thickness of 0.5 ± 0.02 mm is applied. It is placed in a salt spray chamber, with a 5 ± 1% NaCl solution, a chamber temperature of 35 ± 1 °C, and a pH of 6.5 - 7.2, and continuously sprayed for 72 hours. The test piece is taken out, rinsed with deionized water, and the proportion of the surface rust area is visually inspected and rated from level 0 (no visible rust) to level 4 (>50% area rusted). The results are shown in Table 1.

[0057] Table 1 Performance test results

[0058]

[0059] Data analysis:

[0060] As can be seen from the data of Examples 1-3 in Table 1: The cable anti-corrosion grease prepared by the multiple intercalation modification method has excellent performance in various aspects. Especially, it shows remarkable superiority in shear stability, oil separation rate and salt spray corrosion test. This may be because the layer spacing of montmorillonite further increases after three times of intercalation modification. While maintaining high structural stability during the shearing process, the lipophilic property is improved, and there is better molecular affinity and uniform dispersion with the base oil (PAO-8), thus reducing the oil separation rate and improving the anti-corrosion performance.

[0061] As can be seen from the data of Example 2 and Comparative Example 1 in Table 1: The performance of Example 2 is significantly better than that of Comparative Example 1, which indicates that the three-time intercalation modification has an obvious effect on performance improvement. This may be because the three-time intercalation modification process plays a key role in the structural integrity of bentonite. The step-by-step modification of the interlayer organic phase may form a more stable "sandwich" - type layered structure, realizing the gradient matching between the interlayer domain and the base oil phase, thus reducing the interfacial tension between the two phases. The significant difference in shear stability may stem from the mechanical interlocking effect of long-chain alkyl groups, forming reversible physical cross-linking points during the dynamic shearing process.

[0062] As can be seen from the data of Example 2 and Comparative Example 2 in Table 1: The performance of Example 2 is better than that of Comparative Example 2 using twice-intercalated modified montmorillonite, which indicates that the three-time intercalation modification can further optimize the lamellar structure and system performance. Although the twice-intercalation modification has an obvious improvement in the modification of the lamellae, the limited expansion of the layer spacing and the incomplete formation of the best distribution of surface modification may lead to insufficient dispersion of the lamellae in the grease system. After three-time intercalation modification, the distance between the lamellae increases again. And due to the charge effect and the entanglement effect between molecular chains, montmorillonite with high stability and large layer spacing is achieved. At the same time, the surface lipophilicity is further improved, making the rheological properties of montmorillonite in the grease more stable, manifested as obvious improvement in shear stability and oil separation rate.

[0063] As can be seen from the data of Example 2 and Comparative Example 3 in Table 1: The grafting of excessive cetyl chloride will lead to a significant decline in the performance of the cable anti-corrosion grease. This may be because excessive grafting may cause overcrowding in the interlayer domain, destroying the planar orientation of bentonite lamellae. And excessive grafting introduces a large amount of positive charges, resulting in excessive interlayer charge repulsion, thus leading to a decrease in structural stability.

[0064] From the data of Example 2 and Comparative Example 4 in Table 1, it can be seen that the special structure of dihexadecylamine is crucial for optimizing the performance of intercalated modified montmorillonite, and the conformational freedom of the long-chain alkyl group has an important impact on the structural stability of the interlayer domain. The molecular chain entanglement between the long-chain alkyl group and the base oil may form a dynamic physical crosslinking network. At the same time, the hydrophobic property of the long-chain structure may optimize the wetting behavior at the oil-solid interface and reduce the phase separation tendency. This interface optimization effect enables the system to maintain a uniform colloidal dispersion state even at high temperatures.

[0065] From the data of Example 2 and Comparative Example 5 in Table 1, it can be seen that compared with the traditional cetyltrimethylammonium chloride intercalated modified montmorillonite, the three-time intercalated modified montmorillonite prepared in the present invention is more excellent in improving the shear stability and anti-corrosion property of the cable anti-corrosion grease, and significantly reduces the oil separation rate.

[0066] Those of ordinary skill in the art should understand that the discussion of any above embodiments is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

Claims

1. A formulation of a cable anti-corrosion grease, characterized in that, By weight parts, it includes the following components: 70 - 90 parts of synthetic base oil, 8 - 16 parts of three - times intercalated modified montmorillonite, 6 - 10 parts of barium petroleum sulfonate, 3 - 6 parts of lanolin magnesium soap, 1.6 - 2.5 parts of diphenylamine, and 0.6 - 1 part of benzotriazole; The preparation steps of the three - times intercalated modified montmorillonite are as follows: S1: Add sodium - based montmorillonite into deionized water, heat up to 82 - 88 °C, stir for 0.8 - 1.2 h, then add 2,3 - epoxypropyltrimethylammonium chloride, continue to stir for 3 - 5 h, carry out suction filtration, washing, and vacuum drying to obtain the once - intercalated modified montmorillonite; S2: Add the once - intercalated modified montmorillonite into N,N - dimethylformamide, perform ultrasonic treatment for 15 - 25 min, then add dihexadecylamine, stir and react at room temperature for 4 - 6 h, carry out suction filtration, washing, and vacuum drying to obtain the twice - intercalated modified montmorillonite; S3: Add the twice - intercalated modified montmorillonite into N,N - dimethylformamide, perform ultrasonic treatment for 15 - 25 min, then add hexadecyl chloride, heat up to 78 - 82 °C, stir and react for 5 - 7 h, carry out suction filtration, washing, vacuum drying, grinding and sieving to obtain the three - times intercalated modified montmorillonite; In the step S1, the weight ratio of sodium - based montmorillonite, deionized water, and 2,3 - epoxypropyltrimethylammonium chloride is 10 - 20:1000 - 2000:3.2 - 6.5; In the step S2, the weight ratio of the intercalated modified montmorillonite, N,N - dimethylformamide, and dihexadecylamine is 10 - 20:350 - 650:4.5 - 9.5; In the step S3, the weight ratio of the twice - intercalated modified montmorillonite, N,N - dimethylformamide, and hexadecyl chloride is 10 - 20:350 - 650:0.6 - 1.

8.

2. The formulation of the cable anti-corrosion grease according to claim 1, wherein, The synthetic base oil is PAO - 8 or PAO - 10.

3. The formula of the cable anti-corrosion grease according to claim 1, wherein In the step S1, the CEC of the sodium - based montmorillonite is 70 - 150 mmol / 100 g.

4. The formulation of the cable anti-corrosion grease according to claim 1, wherein, In the step S3, the mesh number of the grinding and sieving is 100 - 300 meshes.

5. The production process of the cable anti-corrosion grease according to any one of claims 1-4, characterized in that, It includes the following steps: Add the synthetic base oil into the reaction kettle, start stirring, with the stirring speed of 150 - 250 rpm, heat up to 60 - 70 °C and maintain for 10 - 20 min, add the three - times intercalated modified montmorillonite, heat up to 80 - 90 °C, and increase the stirring speed to 400 - 600 rpm, continuously stir for 25 - 35 min, then successively add barium petroleum sulfonate and lanolin magnesium soap, continue to stir for 40 - 50 min, then cool down to 65 - 75 °C, successively add diphenylamine and benzotriazole, continue to stir for 15 - 25 min, finally add 8 - 12 g of dioctyl phthalate, perform high - pressure homogenization, and finally cool down to 38 - 42 °C, keep warm and age for 10 - 15 h to obtain the cable anti - corrosion grease.

6. The production process of the cable anti-corrosion grease according to claim 1, characterized in that, The high - pressure homogenization is carried out three times at 20 - 30 MPa, 5 - 10 min each time.

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