Pollution-free anti-rust oil and preparation method thereof

Abstract

The invention relates to pollution-free anti-rust oil and a preparation method thereof, and belongs to the technical field of anti-rust oil. The 10 # machine oil is used as a carrier, so that other functional additives can be uniformly dispersed in the oil; barium petroleum sulfonate, sodium petroleum sulfonate, zinc naphthenate and other antirust agents can form a protective film on the metal surface to jointly enhance the antirust effect; benzotriazole is used as a corrosion inhibitor, can form a compact passive film on the metal surface, and acts together with the antirust agent; the sodium dodecyl sulfate has excellent dispersing and emulsifying properties, can help other additives to be better dispersed in the base oil, and in addition, the sodium dodecyl sulfate also can enhance an anti-rust film; 3-mercaptopropyltrimethoxysilane can enhance the adhesive force and water resistance of an anti-rust film and improve the comprehensive performance of the anti-rust oil; by adding the modified wool fat, the stability of the anti-rust oil can be improved, so that the anti-rust oil can keep a good anti-rust effect under various environmental conditions.

Description

Technical Field

[0001] The invention belongs to the technical field of rust-proof oils and relates to pollution-free rust-proof oil and a preparation method thereof. Background Art

[0002] Rust prevention is a crucial step in metal processing and storage. Traditional anti-rust oils often contain chemical components that are harmful to the environment, which may not only harm human health during use, but also pollute the environment during waste disposal. With the increasing awareness of environmental protection, the demand for pollution-free anti-rust oils is growing.

[0003] At present, the formula and preparation process of the rust-proof oil products on the market often have deficiencies, such as poor rust-proof effect, poor stability, easy decomposition and other problems. Some pollution-free rust-proof oils may use relatively expensive raw materials or complex preparation processes, thereby increasing production costs, and some pollution-free rust-proof oils may affect subsequent treatments (such as painting, welding, etc.) during the surface treatment of metal parts. At the same time, due to improper control of process parameters during the preparation process of these rust-proof oils, the quality of the finished products may be unstable, thereby affecting their rust-proof performance and service life.

[0004] Therefore, it is necessary to develop a new type of pollution-free anti-rust oil and its preparation method to solve the problems existing in the prior art. By optimizing the formula and preparation process, the anti-rust performance, stability and environmental protection of the anti-rust oil can be improved, while reducing the production cost to meet market demand. Summary of the invention

[0005] The purpose of the present invention is to provide a pollution-free anti-rust oil and a preparation method thereof, which has the characteristics of good anti-rust performance.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A pollution-free anti-rust oil, the pollution-free anti-rust oil has the following formula: by mass percentage, 75-85% of No. 10 machine oil, 5-8% of barium petroleum sulfonate, 2-5% of modified lanolin, 1-2% of sodium petroleum sulfonate, 1-2% of zinc cyclohexane, 0.05-0.1% of benzotriazole, 1-2% of oleic acid, 0.9-0.95% of triethanolamine, 2-3% of sodium dodecyl sulfonate, 2-3% of 3-mercaptopropyltrimethoxysilane,

[0008] Wherein, the preparation method of modified lanolin is as follows:

[0009] S1.1: Heat lanolin to 35-40°C to make it molten, keep the temperature constant for 0.5h, stir at 120r / min and slowly heat to 80°C, add rosin, wherein the mass ratio of rosin to lanolin is (0.5-1):1, continue stirring at 80°C for 2h, and obtain mixture A;

[0010] S1.2: Sodium dodecylbenzene sulfonate and beeswax are mixed in a mass ratio of 1:(1-2), and ground in a ball mill for 0.5 h to obtain a mixed solid B;

[0011] S1.3: Lower the temperature of mixture A to 70°C and increase the rotation speed to 180 r / min, add mixed solid B to mixture A, the mass ratio of mixture A to mixed solid B is (5-7):1, and after stirring for 2 hours, obtain the modified lanolin.

[0012] Furthermore, the heating rate of the lanolin in S1.1 is 5°C / min.

[0013] Furthermore, the rate of slowly heating to 80° C. in S1.1 is 2° C. / min.

[0014] Furthermore, the rotation speed of the ball mill in S1.2 is 500 r / min.

[0015] Furthermore, the particle size of the mixed solid B obtained by grinding in S1.2 is 500 mesh.

[0016] A method for preparing pollution-free rust-proof oil, the specific steps of the preparation method are as follows:

[0017] S6.1: Heat No. 10 machine oil to 50-60°C, stir at 180 r / min for 1 hour, then add barium petroleum sulfonate, modified lanolin, sodium petroleum sulfonate and zinc cyclohexaneate in proportion, continue stirring for 1-2 hours, and obtain mixture C;

[0018] S6.2: Continue stirring, adjust the speed to 160 r / min, add benzotriazole, oleic acid and triethanolamine, and stir for 1 to 2 h to obtain a mixture D;

[0019] S6.3: Slowly lower the temperature to 30-40°C, add sodium dodecyl sulfate and 3-mercaptopropyltrimethoxysilane to the mixture D after the temperature is maintained constant, and continue stirring at a speed of 160 r / min for 2 h to obtain a mixture E;

[0020] S6.4: Filter the mixture E using filter cloth and let it stand for 6 hours to obtain the pollution-free rust-proof oil.

[0021] Furthermore, the heating rate in S6.1 is 2°C / min.

[0022] Furthermore, the cooling rate in S6.3 is 1°C / min.

[0023] Furthermore, the pore size of the filter cloth in S6.4 is 500 meshes.

[0024] Furthermore, the pollution-free anti-rust oil prepared in S6.4 is stored in an environment with a temperature of 25° C. and a humidity of 20-25%.

[0025] The present invention uses No. 10 machine oil as a carrier so that other functional additives can be evenly dispersed in the oil. No. 10 machine oil, as a base oil, can utilize its own oil effect to perform physical adsorption at places where corrosion inhibitors are less adsorbed, and work together with rust inhibitor molecules to block pores and make the adsorption film more complete and tight; rust inhibitors such as petroleum barium sulfonate, petroleum sodium sulfonate, and zinc cyclohexaneate can form a protective film on the metal surface, and these protective films are complementary to each other and jointly enhance the rust prevention effect; benzotriazole, as a corrosion inhibitor, can form a dense passivation film on the metal surface, and work together with other rust inhibitors to further improve the rust prevention performance; sodium dodecyl sulfonate has excellent dispersing and emulsifying properties, and it can help other additives to be better dispersed in the base oil, and improve the uniformity and stability of the rust-proof oil. In addition, sodium dodecyl sulfonate can also enhance the rust prevention film through the hydrophilicity in its molecular structure. The groups and hydrophobic groups interact with the metal surface to improve the density and stability of the anti-rust film, and sodium dodecyl sulfonate can synergize with the sodium petroleum sulfonate in the formula to jointly improve the anti-rust performance and stability of the rust-proof oil. This is because the sulfonic acid groups in the molecular structure of sodium petroleum sulfonate can react chemically with the metal surface to form a dense protective film. This film can effectively isolate the metal from oxygen and moisture in the air and slow down the corrosion rate of the metal. When the two are compounded, a denser and more stable composite protective film can be formed on the metal surface. This film not only enhances the physical isolation effect, but also may further improve the anti-rust performance through chemical action; 3-mercaptopropyltrimethoxysilane can enhance the adhesion and water resistance of the anti-rust film, so that the anti-rust film can maintain a good anti-rust effect in a humid environment. It works together with other additives to improve the comprehensive performance of the rust-proof oil.

[0026] Among them, the main principle of 3-mercaptopropyltrimethoxysilane's rust-proof effect is as follows: the thiol (-SH) functional group contained at one end of 3-mercaptopropyltrimethoxysilane can form a covalent bond with the metal surface, showing strong metal affinity, thereby producing a good adhesion effect on the metal. The other end is three hydrolyzable methoxysilane functional groups, which can generate silanols after hydrolysis. Silanols can react with oxides generated on the metal surface to form chemical bonds. In this way, 3-mercaptopropyltrimethoxysilane can firmly bond organic polymers to inorganic metal surfaces and form a dense protective film on the metal surface. Specifically, when the solution of 3-mercaptopropyltrimethoxysilane comes into contact with the metal surface, its methoxysilane group will hydrolyze to generate silanols and release methanol at the same time. Silanols further undergo condensation reactions with hydroxyls on the metal surface (which may come from metal oxides or moisture in the treatment process) to form a strong chemical bond. The mercapto group forms a covalent bond with the metal atom, further strengthening the bonding force between the protective film and the metal surface; in addition, the mercapto group of 3-mercaptopropyltrimethoxysilane can also react with unsaturated fats, polyesters and other substances, which further enhances its versatility and anti-rust effect in anti-rust oil.

[0027] Therefore, the addition of 3-mercaptopropyltrimethoxysilane can further form a dense and firm protective film on the metal surface, effectively isolating air and moisture, preventing metal corrosion and oxidation, and thus achieving a significant anti-rust effect.

[0028] Modified lanolin is also added in the present invention, which has good lubricity and adhesion, can enhance the compactness and adhesion of the anti-rust film, and improve the anti-rust effect; as a natural resin, rosin can increase the adhesion and hardness of lanolin, and at the same time improve its dispersibility and stability in anti-rust oil. By mixing with lanolin, a tougher and more durable protective film can be formed, thereby enhancing the anti-rust effect; sodium dodecylbenzene sulfonate has good emulsification, dispersion and wetting properties. In the process of modifying lanolin, it can help other ingredients to be better dispersed in lanolin, and at the same time improve the affinity of modified lanolin with the metal surface, so that the formed protective film is more uniform and tight; beeswax has good water resistance and lubricity, and adding it to lanolin can further improve its anti-rust performance and protect the metal surface from erosion by moisture and other corrosive substances. At the same time, beeswax can also increase the flexibility and glossiness of the protective film.

[0029] The ingredients in modified lanolin, such as rosin, sodium dodecylbenzene sulfonate and beeswax, can work together to form a tougher, more uniform and tighter protective film, effectively isolating moisture, oxygen and other corrosive substances, thereby greatly enhancing the anti-rust performance of the anti-rust oil. The addition of modified lanolin can improve the stability of the anti-rust oil, so that it can maintain a good anti-rust effect under various environmental conditions. This helps to extend the service life of metal products and reduce losses caused by rust. Modified lanolin has good lubricity and fluidity, which can make it easier to apply and evenly distribute the anti-rust oil on the metal surface. This can not only improve the application efficiency, but also reduce the friction and damage of the anti-rust oil on the metal surface during use.

[0030] The rust-proof oil formula of the present invention mainly adopts environmentally friendly additives, uses No. 10 machine oil as base oil, and rust inhibitors such as petroleum barium sulfonate, petroleum sodium sulfonate, zinc cyclohexaneate, etc. These ingredients are relatively friendly to the environment and are not easy to decompose and produce harmful substances; although additives such as benzotriazole and triethanolamine in the formula have certain chemical activity, their usage amount in the formula is low, and these ingredients themselves have relatively low toxicity, and the harm to the environment and human body during use is small; additives such as oleic acid and sodium dodecyl sulfate have certain biodegradability, which means that they can be decomposed by microorganisms in the environment, reducing the risk of long-term pollution to the environment, and the formula improves the stability and rust-proof performance of the rust-proof oil by optimizing the combination of ingredients, thereby reducing the repeated application and cleaning process caused by poor rust-proof effect, and further reducing harmful emissions that may be generated during the cleaning process. DETAILED DESCRIPTION

[0031] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in combination with the embodiments.

[0032] Example 1

[0033] The pollution-free anti-rust oil is formulated as follows: by mass percentage, No. 10 machine oil 77%, barium petroleum sulfonate 5%, modified lanolin 5%, sodium petroleum sulfonate 2%, zinc cyclohexane 2%, benzotriazole 0.1%, oleic acid 2%, triethanolamine 0.9%, sodium dodecyl sulfonate 3%, 3-mercaptopropyltrimethoxysilane 3%,

[0034] Wherein, the preparation method of modified lanolin is as follows:

[0035] S1.1: Heat lanolin to 40°C at a rate of 5°C / min to make it molten, keep the temperature constant for 0.5h, stir at a speed of 120r / min and slowly heat to 80°C at a rate of 2°C / min, add rosin, wherein the mass ratio of rosin to lanolin is 1:1, continue stirring at 80°C for 2h, and obtain mixture A;

[0036] S1.2: Sodium dodecylbenzene sulfonate and beeswax were mixed in a mass ratio of 1:1, and ground in a ball mill for 0.5 h at a rotation speed of 500 r / min to obtain a mixed solid B, the particle size of the mixed solid B being 500 mesh;

[0037] S1.3: The temperature of mixture A is lowered to 70°C, and the rotation speed is increased to 180 r / min, and mixed solid B is added to mixture A, the mass ratio of mixture A to mixed solid B is 6:1, and after stirring for 2 hours, the modified lanolin is obtained.

[0038] A method for preparing pollution-free rust-proof oil, the specific steps of the preparation method are as follows:

[0039] S6.1: Heat No. 10 machine oil to 55°C at a rate of 2°C / min, stir at 180r / min for 1h, then add barium petroleum sulfonate, modified lanolin, sodium petroleum sulfonate and zinc cyclohexaneate in proportion, continue stirring for 2h, and obtain mixture C;

[0040] S6.2: Continue stirring, adjust the speed to 160 r / min, add benzotriazole, oleic acid and triethanolamine, and stir for 2 h to obtain a mixture D;

[0041] S6.3: The temperature was slowly lowered to 30°C at a rate of 1°C / min. After the temperature was maintained constant, sodium dodecyl sulfate and 3-mercaptopropyltrimethoxysilane were added to the mixture D, and the mixture was stirred at a speed of 160 r / min for 2 h to obtain a mixture E.

[0042] S6.4: Filter the mixture E using a 500-mesh filter cloth and let it stand for 6 hours to obtain the pollution-free anti-rust oil. The storage environment temperature is 25° C. and the humidity is 20%.

[0043] Example 2

[0044] The pollution-free anti-rust oil is formulated as follows: by mass percentage, No. 10 machine oil 75%, petroleum barium sulfonate 8%, modified lanolin 5%, sodium petroleum sulfonate 2%, zinc cyclohexane 2%, benzotriazole 0.05%, oleic acid 2%, triethanolamine 0.95%, sodium dodecyl sulfonate 2%, 3-mercaptopropyltrimethoxysilane 3%,

[0045] Wherein, the preparation method of modified lanolin is as follows:

[0046] S1.1: Heat lanolin to 35°C at a rate of 5°C / min to make it molten, keep the temperature constant for 0.5h, stir at a speed of 120r / min and slowly heat to 80°C at a rate of 2°C / min, add rosin, wherein the mass ratio of rosin to lanolin is 0.5:1, continue stirring at 80°C for 2h, and obtain mixture A;

[0047] S1.2: Sodium dodecylbenzene sulfonate and beeswax were mixed in a mass ratio of 1:1, and ground in a ball mill for 0.5 h at a rotation speed of 500 r / min to obtain a mixed solid B, the particle size of the mixed solid B being 500 mesh;

[0048] S1.3: The temperature of mixture A is lowered to 70°C, and the rotation speed is increased to 180 r / min, and mixed solid B is added to mixture A, the mass ratio of mixture A to mixed solid B is 5:1, and after stirring for 2 hours, the modified lanolin is obtained.

[0049] A method for preparing pollution-free rust-proof oil, the specific steps of the preparation method are as follows:

[0050] S6.1: Heat No. 10 machine oil to 50°C at a rate of 2°C / min, stir at 180r / min for 1h, then add barium petroleum sulfonate, modified lanolin, sodium petroleum sulfonate and zinc cyclohexaneate in proportion, continue stirring for 1h, and obtain mixture C;

[0051] S6.2: Continue stirring, adjust the speed to 160 r / min, add benzotriazole, oleic acid and triethanolamine, and stir for 1 h to obtain a mixture D;

[0052] S6.3: The temperature was slowly lowered to 40°C at a rate of 1°C / min. After the temperature was maintained constant, sodium dodecyl sulfate and 3-mercaptopropyltrimethoxysilane were added to the mixture D, and the mixture was stirred at a speed of 160 r / min for 2 h to obtain a mixture E.

[0053] S6.4: Filter the mixture E using a 500-mesh filter cloth and let it stand for 6 hours to obtain the pollution-free rust-proof oil. The storage environment temperature is 25° C. and the humidity is 25%.

[0054] Example 3

[0055] The pollution-free anti-rust oil is formulated as follows: by mass percentage, No. 10 machine oil 85%, petroleum barium sulfonate 5%, modified lanolin 2%, petroleum sodium sulfonate 1%, zinc cyclohexane 1%, benzotriazole 0.1%, oleic acid 1%, triethanolamine 0.9%, sodium dodecyl sulfonate 2%, 3-mercaptopropyltrimethoxysilane 2%,

[0056] Wherein, the preparation method of modified lanolin is as follows:

[0057] S1.1: Heat lanolin to 35-40°C at a rate of 5°C / min to make it molten, keep the temperature constant for 0.5h, stir at a speed of 120r / min and slowly heat to 80°C at a rate of 2°C / min, add rosin, wherein the mass ratio of rosin to lanolin is 1:1, continue stirring at 80°C for 2h, and obtain mixture A;

[0058] S1.2: Sodium dodecylbenzene sulfonate and beeswax were mixed in a mass ratio of 1:2, and ground in a ball mill for 0.5 h at a rotation speed of 500 r / min to obtain a mixed solid B, the particle size of which was 500 mesh;

[0059] S1.3: The temperature of mixture A is lowered to 70°C, and the rotation speed is increased to 180 r / min, and mixed solid B is added to mixture A, the mass ratio of mixture A to mixed solid B is 7:1, and after stirring for 2 hours, the modified lanolin is obtained.

[0060] A method for preparing pollution-free rust-proof oil, the specific steps of the preparation method are as follows:

[0061] S6.1: Heat No. 10 machine oil to 60°C at a rate of 2°C / min, stir at 180r / min for 1h, then add barium petroleum sulfonate, modified lanolin, sodium petroleum sulfonate and zinc cyclohexaneate in proportion, continue stirring for 2h, and obtain mixture C;

[0062] S6.2: Continue stirring, adjust the speed to 160 r / min, add benzotriazole, oleic acid and triethanolamine, and stir for 2 h to obtain a mixture D;

[0063] S6.3: The temperature was slowly lowered to 40°C at a rate of 1°C / min. After the temperature was maintained constant, sodium dodecyl sulfate and 3-mercaptopropyltrimethoxysilane were added to the mixture D, and the mixture was stirred at a speed of 160 r / min for 2 h to obtain a mixture E.

[0064] S6.4: Filter the mixture E using a 500-mesh filter cloth and let it stand for 6 hours to obtain the pollution-free anti-rust oil. The storage environment temperature is 25° C. and the humidity is 20%.

[0065] Comparative Example 1

[0066] In this comparative example, no rosin was added during the modification of lanolin, and the remaining steps were consistent with those of Example 1.

[0067] Comparative Example 2

[0068] In this comparative example, sodium dodecylbenzene sulfonate was not added during the modification of lanolin, and the remaining steps were consistent with those of Example 1.

[0069] Comparative Example 3

[0070] In this comparative example, no beeswax was added during the modification of lanolin, and the remaining steps were consistent with those of Example 1.

[0071] Comparative Example 4

[0072] In this comparative example, lanolin was not modified, and the remaining steps were consistent with those in Example 1.

[0073] Comparative Example 5

[0074] In this comparative example, sodium dodecyl sulfate was not added during the preparation of the pollution-free anti-rust oil, and the remaining steps were consistent with those of Example 1.

[0075] Comparative Example 6

[0076] In this comparative example, 3-mercaptopropyltrimethoxysilane was not added during the preparation of the pollution-free anti-rust oil, and the remaining steps were consistent with those of Example 1.

[0077] The anti-rust performance of the examples and comparative examples was tested according to the standard SH / T 0533-93 (2004). The experimental results are summarized in the following table:

[0078]

[0079]

[0080] From the above experiments, it can be seen that the modification of lanolin and the addition of sodium dodecyl sulfate and 3-mercaptopropyltrimethoxysilane can effectively improve the performance of anti-rust oil.

[0081] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A pollution-free anti-rust oil, characterized in that: The pollution-free anti-rust oil is formulated as follows: by mass percentage, No. 10 machine oil 75-85%, petroleum barium sulfonate 5-8%, modified lanolin 2-5%, petroleum sodium sulfonate 1-2%, zinc cyclohexane 1-2%, benzotriazole 0.05-0.1%, oleic acid 1-2%, triethanolamine 0.9-0.95%, sodium dodecyl sulfonate 2-3%, 3-mercaptopropyltrimethoxysilane 2-3%, Wherein, the preparation method of modified lanolin is as follows: S1.1: Heat lanolin to 35-40°C to make it molten, keep the temperature constant for 0.5h, stir at 120r / min and slowly heat to 80°C, add rosin, wherein the mass ratio of rosin to lanolin is (0.5-1):1, continue stirring at 80°C for 2h, and obtain mixture A; S1.2: Sodium dodecylbenzene sulfonate and beeswax are mixed in a mass ratio of 1:(1-2), and ground in a ball mill for 0.5 h to obtain a mixed solid B; S1.3: Lower the temperature of mixture A to 70°C and increase the rotation speed to 180 r / min, add mixed solid B to mixture A, the mass ratio of mixture A to mixed solid B is (5-7):1, and after stirring for 2 hours, obtain the modified lanolin.

2. A pollution-free anti-rust oil according to claim 1, characterized in that: The heating rate of lanolin in S1.1 is 5°C / min.

3. A pollution-free anti-rust oil according to claim 1, characterized in that: The rate of slowly heating to 80°C in S1.1 is 2°C / min.

4. The pollution-free rust-proof oil according to claim 1, characterized in that: The rotation speed of the ball mill in S1.2 is 500r / min.

5. The pollution-free rust-proof oil according to claim 1, characterized in that: The particle size of the mixed solid B obtained by grinding in S1.2 is 500 mesh.

6. A method for preparing a pollution-free rust-proof oil, based on the pollution-free rust-proof oil according to any one of claims 1 to 5, characterized in that: The specific steps of the preparation method are as follows: S6.1: Heat No. 10 machine oil to 50-60°C, stir at 180 r / min for 1 hour, then add barium petroleum sulfonate, modified lanolin, sodium petroleum sulfonate and zinc cyclohexaneate in proportion, continue stirring for 1-2 hours, and obtain mixture C; S6.2: Continue stirring, adjust the speed to 160 r / min, add benzotriazole, oleic acid and triethanolamine, and stir for 1 to 2 h to obtain a mixture D; S6.3: Slowly lower the temperature to 30-40°C, add sodium dodecyl sulfate and 3-mercaptopropyltrimethoxysilane to the mixture D after the temperature is maintained constant, and continue stirring at a speed of 160 r / min for 2 h to obtain a mixture E; S6.4: Filter the mixture E using filter cloth and let it stand for 6 hours to obtain the pollution-free rust-proof oil.

7. The method for preparing a pollution-free rust-proof oil according to claim 6, characterized in that: The heating rate in S6.1 is 2°C / min.

8. The method for preparing a pollution-free rust-proof oil according to claim 6, characterized in that: The cooling rate in S6.3 is 1°C / min.

9. The method for preparing a pollution-free rust-proof oil according to claim 6, characterized in that: The pore size of the filter cloth in S6.4 is 500 mesh.

10. The method for preparing a pollution-free rust-proof oil according to claim 6, characterized in that: The pollution-free anti-rust oil prepared in S6.4 is stored in an environment with a temperature of 25° C. and a humidity of 20-25%.

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