High-efficiency rust-proof oil, preparation method and application thereof

Abstract

The application provides a high-efficiency rust-proof oil and a preparation method and application thereof. The rust-proof oil comprises, by weight, 60-80 parts of base oil, 1-4 parts of rust-proof agent, 15-25 parts of corrosion inhibitor, 1-3 parts of antioxidant, 0.5-2 parts of metal passivator, 1-3 parts of film forming agent, 0.3-0.45 parts of 1,4-diaminoanthraquinone and 0.25-0.75 parts of methyl octanoate. The preparation method comprises the following steps: heating and stirring No. 10 white oil and No. 32 white oil to obtain the base oil; adding the rust-proof agent, the corrosion inhibitor, the antioxidant, the metal passivator and the film forming agent into the base oil in sequence, secondly stirring, then adding the 1,4-diaminoanthraquinone and the methyl octanoate, thirdly stirring, fourthly stirring the obtained mixture, and adding triethanolamine dropwise until the pH value is 7.2-7.5 to obtain the rust-proof oil. The rust-proof oil is used in the field of metal rust prevention, and the corrosion resistance of the metal surface is greatly improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of rust-proof oil, in particular to a high-efficiency rust-proof oil and a preparation method and application thereof. BACKGROUND

[0002] With the development of mechanical automation, the wear and corrosion of metal parts in equipment are paid more and more attention. The rust-proof oil is mainly used for preventing the rusting of metal products and products mainly made of metal. The rust-proof oil can form a protective film on the metal surface to prevent oxygen, water and other corrosive media from contacting the metal, thereby reducing the occurrence of corrosion reactions. Meanwhile, the rust-proof oil also has good lubricating performance to reduce the friction and wear between metal surfaces.

[0003] Aluminum alloy is one of the metals with the largest use and the widest application range. It has the characteristics of light weight, high mechanical performance, good heat and electricity conduction performance and the like, and is widely used in the fields of petroleum, aviation and light industry. In the prior art, the rust-proof oil is coated on the surface of the aluminum alloy to form a rust-proof film layer on the surface of the aluminum alloy to slow down the corrosion of the aluminum alloy. However, due to the active nature of aluminum, the aluminum alloy will be in contact with the external environment during long-term use and storage, so that the relatively active metal aluminum is prone to corrosion reaction with pollutants. These corrosion reactions can damage the rust-proof film on the surface of the aluminum alloy, causing large-area corrosion on the surface of the aluminum alloy, resulting in a short service life of the rust-proof oil, and the need for regular rust-proof oil recoating, and affecting the stable operation of the aluminum alloy equipment. SUMMARY

[0004] The application provides a high-efficiency rust-proof oil and a preparation method and application thereof to solve the above problems mentioned in the background.

[0005] In one aspect, the application provides a high-efficiency rust-proof oil, which comprises the following components by weight:

[0006] 60-80 parts by weight of base oil, 1-4 parts by weight of rust-proof agent, 15-25 parts by weight of corrosion inhibitor, 1-3 parts by weight of antioxidant, 0.5-2 parts by weight of metal passivator and 1-3 parts by weight of film-forming agent.

[0007] Optionally, the base oil comprises No. 10 white oil and No. 32 white oil, and the weight ratio of the No. 10 white oil to the No. 32 white oil is 1:0.5-2.

[0008] Optionally, the rust-proof agent comprises calcium petroleum sulfonate and / or sodium petroleum sulfonate.

[0009] Optionally, the corrosion inhibitor is sodium mercaptobenzothiazole.

[0010] Optionally, the antioxidant is dilauryl thiodipropionate or distearyl thiodipropionate.

[0011] Optionally, the film forming agent includes one or more of lanolin, vaseline, and lanolin magnesium soap.

[0012] Optionally, the metal passivator includes benzotriazole or a benzotriazole derivative.

[0013] In another aspect, the application provides a preparation method of the high-efficiency rust-proof oil, which is used for preparing the high-efficiency rust-proof oil, and includes the following steps:

[0014] (1) According to the weight parts, No. 10 white oil and No. 32 white oil are added to a container, heated to 50-60℃, and first stirred for 10-30 min to obtain a base oil;

[0015] (2) The rust-proof agent, the corrosion inhibitor, the antioxidant, the metal passivator, and the film forming agent are sequentially added to the base oil, and second stirred for 0.5-1.5 h at 50-60℃ constant temperature to obtain the rust-proof oil.

[0016] Optionally, the rotation speed of the first stirring and the second stirring is controlled at 300-800 r / min.

[0017] In another aspect, the application provides an application of the high-efficiency rust-proof oil, which is the high-efficiency rust-proof oil or the rust-proof oil prepared by the method, and is applied to the field of metal rust prevention.

[0018] The high-efficiency rust-proof oil, the preparation method and the application thereof provided by the application realize the preparation and application of the rust-proof oil, and have the following beneficial effects compared with the prior art:

[0019] (1) The rust-proof agent, the corrosion inhibitor, the antioxidant, the metal passivator, and the film forming agent are dispersed in the base oil according to the weight parts to form a uniform and stable rust-proof agent, which acts on the metal surface, and the components are compatible and synergistic with each other to form a dense, continuous and stable protective film on the metal surface, which acts as a barrier to isolate the direct contact between the metal and the corrosion medium, and reduces the corrosion of the metal surface. At the same time, by selecting the above appropriate proportion, the protective film formed on the metal surface is more dense, and at the same time can penetrate into the gap of the metal surface, further reducing the active sites on the surface of the aluminum alloy, greatly improving the corrosion prevention efficiency, and helping the long-term stable operation of the equipment.

[0020] (2) By mixing No. 10 white oil and No. 32 white oil in a certain proportion as a base oil, the permeability and lubricity of the rust-proof agent can be improved, which helps the rust-proof agent to better penetrate into the gap of the metal surface, improves the density and stability of the protective film on the metal surface, reduces the activity of the active center on the surface of the aluminum alloy, and thus reduces the corrosion of the aluminum alloy.

[0021] (3) by adding 1,4-diaminoanthraquinone and methyl octanoate to the rust-proof oil, the 1,4-diaminoanthraquinone contains a benzene ring and an electronegative N, after the rust-proof oil is coated on the metal surface, the N in the 1,4-diaminoanthraquinone can form a coordination bond with the active site of the aluminum alloy surface, occupying the active site of the metal surface, and synergistically acting with other components to form a protective film on the metal surface, avoiding the contact of the metal surface with the corrosion medium. At the same time, the structure of methyl octanoate contains a long-chain alkyl group, which has a certain hydrophobicity, which can improve the hydrophobicity of the protective film formed by the rust-proof oil, further reducing the contact of water in the corrosion medium with the metal, and at the same time, the 1,4-diaminoanthraquinone and each component are adsorbed on the metal surface through intermolecular hydrogen bonds and coordination bonds to form a protective film, and the long-chain alkyl group of methyl octanoate is closely arranged and assembled, improving the compactness of the protective film, and the synergistic effect of each component further improves the mechanical strength and stability of the protective film, which is helpful to the corrosion and wear resistance of the metal surface. At the same time, the pH value of the rust inhibitor is adjusted to 7.2-7.5, and the appropriate pH value is helpful to the reaction of the active groups in the rust inhibitor with the metal surface, so that the protective film is more easily grown on the metal surface, thereby improving the corrosion resistance of the metal surface.

[0022] (4) The preparation method of the present application is simple, easy to operate, and convenient for large-scale production. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0024] Figure 1 The salt spray resistance test diagram of the rust inhibitor provided for the present application Example 2, Example 5 and the blank group;

[0025] Figure 2 The salt spray resistance test diagram of the rust inhibitor provided for the present application Example 5. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor also belong to the scope of protection of the present application.

[0027] In one aspect, the present application provides a high-efficiency rust-proof oil, which comprises the following components by weight:

[0028] The base oil 60-80 parts by weight, anti-rust agent 1-4 parts by weight, corrosion inhibitor 15-25 parts by weight, antioxidant 1-3 parts by weight, metal passivator 0.5-2 parts by weight and film forming agent 1-3 parts by weight.

[0029] Specifically, the base oil is used as the main component of the anti-rust oil. On the one hand, the base oil acts as a carrier, allowing other components to be uniformly dispersed, thereby improving the anti-rust effect. On the other hand, the base oil physically adsorbs on the metal surface to form a protective film, thereby more effectively protecting the metal surface. At the same time, the base oil also has certain lubricating properties, which can reduce the friction between metal parts and prolong the service life of the equipment. The anti-rust agent and the base oil work together to form a protective film on the metal surface, thereby isolating the metal from contact with corrosive substances such as air and moisture, slowing down the oxidation and rusting speed of the metal. The corrosion inhibitor can prevent the diffusion of water, oxygen and other corrosive ions in the corrosion medium to the metal surface, thereby playing a corrosion inhibition role. The antioxidant is dispersed in the base oil, which reduces the oxidation reaction by decomposing hydroperoxides and capturing free radicals, and at the same time cooperates with other components to form a protective film, isolating the aluminum alloy surface from contact with corrosive media, preventing the oxidation reaction of the protective film on the metal surface with corrosive media, and prolonging the service life of the anti-rust agent, thereby protecting the metal surface and prolonging the service life of the metal equipment.

[0030] The metal passivator can form a uniform and dense oxide film or passivation film on the metal surface, change the electrochemical properties of the metal surface, and make the metal in an electrochemically inert state, thereby slowing down the electrochemical reaction between the metal surface and the surrounding medium, preventing the occurrence of chemical or electrochemical corrosion reaction. The film forming agent forms an isolation film on the metal surface, which plays a protective role. It can strengthen the strength of the protective film and prevent the anti-rust oil from being washed away by condensation dew in salt spray and humid heat environments, thereby improving the adhesion and strength of the anti-rust agent on the metal surface.

[0031] By dispersing the anti-rust agent, corrosion inhibitor, antioxidant, metal passivator and film forming agent in the base oil according to the weight parts, a uniform and stable anti-rust agent is formed. The anti-rust agent acts on the metal surface, and the components are compatible and synergistic with each other, forming a dense, continuous and stable protective film on the metal surface, which acts as a barrier to isolate the metal from direct contact with corrosive media, thereby reducing the corrosion of the metal surface. At the same time, by selecting the appropriate proportions of the above components, the protective film formed on the metal surface is more dense, and at the same time can penetrate into the gaps on the metal surface, further reducing the active sites on the aluminum alloy surface, greatly improving the corrosion prevention efficiency, and helping the long-term stable operation of the equipment.

[0032] Optionally, the base oil includes No. 10 white oil and No. 32 white oil, and the weight ratio of No. 10 white oil to No. 32 white oil is 1:0.5-2.

[0033] Specifically, the white oil has good chemical properties and stability, is not easy to deteriorate, has a long shelf life, and the white oil does not contain wax and impurities, can form a protective film on the metal surface, isolate oxygen and water, and thus prevent the metal surface from rusting. The No. 10 white oil has moderate viscosity and is commonly used in light load, low speed mechanical equipment, and the No. 32 white oil has higher viscosity and is suitable for lubrication in heavy load, high speed and high temperature environment. By mixing the No. 10 white oil and the No. 32 white oil in proportion, the permeability and lubricity of the rust inhibitor can be improved, which helps the rust inhibitor to better penetrate into the gap of the metal surface, improves the density and stability of the protective film on the metal surface, and reduces the activity of the aluminum alloy surface, thereby reducing the corrosion of the aluminum alloy.

[0034] By mixing the No. 10 white oil and the No. 32 white oil in a weight ratio of 1:0.5-2, and compounding with other components, the corrosion resistance of the aluminum alloy surface is improved by the synergistic effect of the components.

[0035] Optionally, the rust inhibitor includes calcium petroleum sulfonate and / or sodium petroleum sulfonate.

[0036] Specifically, the calcium petroleum sulfonate / sodium petroleum sulfonate is an oil-soluble surfactant that can promote the adsorption and dispersion of the rust inhibitor on the metal surface, has good salt water corrosion resistance and sweat replacement properties, and helps to improve the stability of the protective film formed by the rust inhibitor on the metal surface, achieving the anti-rust effect on the metal surface. It also has good extreme pressure property and high thermal stability, and is suitable for use in high temperature and other conditions by synergistic effect with other components.

[0037] Optionally, the corrosion inhibitor is sodium dithizone.

[0038] Optionally, the antioxidant is dilauryl thiodipropionate or distearyl thiodipropionate.

[0039] Specifically, the antioxidant prevents oxidation of the components in the rust inhibitor by decomposing hydroperoxides, reduces oxidation reactions, and forms a protective film by synergistic effect with other components, thereby prolonging the service life of the equipment.

[0040] Optionally, the film forming agent includes one or more of lanolin, vaseline, and lanolin magnesium soap.

[0041] Optionally, the metal passivator includes benzotriazole or benzotriazole derivatives. The benzotriazole derivatives can be selected from one or more of 4-benzotriazole sulfonic acid, 5-methyl-4-benzotriazole sulfonic acid, 4-benzotriazole carboxylic acid, and 5-benzotriazole carboxylic acid.

[0042] In another aspect, the application provides a preparation method of high-efficiency rust-proof oil, which is used for preparing the high-efficiency rust-proof oil mentioned above, and comprises the following steps:

[0043] (1) 10# white oil and 32# white oil are added into a container, heated to 50-60℃, and first stirred for 10-30 min to obtain base oil;

[0044] (2) rust-proof agent, corrosion inhibitor, antioxidant, metal passivator and film-forming agent are sequentially added into the base oil, and second stirred for 0.5-1.5 h at 50-60℃ to obtain rust-proof oil.

[0045] Optionally, the rotation speed of the first stirring and the second stirring is controlled at 300-800 r / min.

[0046] Specifically, first, 10# white oil and 32# white oil are added into a container, and stirred at 50-60℃ to make the two base oils fully mixed, then rust-proof agent, corrosion inhibitor, antioxidant, metal passivator and film-forming agent are sequentially added into the base oil, and stirred to make the components uniformly dispersed in the base oil until transparent, i.e. to obtain high-efficiency rust-proof oil. Controlling the rotation speed of the first stirring and the second stirring makes the components more efficiently mixed, which helps to improve the uniformity of the rust-proof agent, and further improves the stability and strength of the protective film formed by the rust-proof agent on the metal surface, and is beneficial to improve the rust-proof efficiency on the metal surface.

[0047] The application realizes the preparation of high-efficiency rust-proof oil by the above-mentioned scheme, i.e. by heating and mixing 10# white oil and 32# white oil, then sequentially adding rust-proof agent, corrosion inhibitor, antioxidant, metal passivator and film-forming agent into the base oil, and stirring to make the components uniformly dispersed in the base oil to obtain high-efficiency rust-proof oil. The components synergize with each other to form a dense, stable and continuous protective film on the metal surface, which isolates the direct contact between the corrosion medium and the metal surface, and can also improve the stability of the protective film on the metal surface, which is beneficial to improve the rust-proof efficiency on the metal surface.

[0048] Further, the high-efficiency rust-proof oil provided by the application further comprises 0.3-0.45 parts by weight of 1,4-diaminoanthraquinone and 0.25-0.75 parts by weight of methyl octanoate.

[0049] Preferably, the preparation method of the high-efficiency rust-proof oil further comprises: sequentially adding the rust-proof agent, the corrosion inhibitor, the antioxidant, the metal passivator and the film-forming agent into the base oil, after constant temperature stirring at 50-60°C for 0.5-1.5h, adding 1,4-diaminoanthraquinone and methyl octanoate, performing third stirring at 65-78°C for 30-45min, naturally cooling to room temperature, obtaining a mixture, performing fourth stirring on the mixture, and adding triethanolamine dropwise into the mixture to adjust the pH value of the mixture to 7.2-7.5, thereby obtaining the high-efficiency rust-proof oil. The rotating speed of the third stirring and the fourth stirring is controlled to be 400-850r / min.

[0050] By adding 1,4-diaminoanthraquinone and methyl octanoate into the rust-proof oil, the benzene ring and the electronegative N in the 1,4-diaminoanthraquinone can form a coordination bond with the active sites on the surface of the aluminum alloy after the rust-proof oil is coated on the metal surface, thereby occupying the active sites on the metal surface and forming a protective film on the metal surface in cooperation with other components, so as to avoid the contact between the metal surface and the corrosion medium. The presence of the benzene ring is beneficial to improving the stability and mechanical strength of the protective film. Meanwhile, the structure of the methyl octanoate contains a long-chain alkyl group, which has a certain hydrophobicity and can improve the hydrophobicity of the protective film formed by the rust-proof oil, thereby further reducing the contact between water in the corrosion medium and the metal. Meanwhile, the 1,4-diaminoanthraquinone and each component are adsorbed on the metal surface through intermolecular hydrogen bonds and coordination bonds to form a protective film, and the long-chain alkyl group of the methyl octanoate is closely arranged and assembled to improve the compactness of the protective film. The synergistic effect of each component further improves the mechanical strength and stability of the protective film, which is helpful to the corrosion resistance and wear resistance of the metal surface. Meanwhile, the pH value of the rust-proof agent is adjusted to 7.2-7.5, and the appropriate pH value is helpful to the reaction between the active groups in the rust-proof agent and the metal surface, so that the protective film is more likely to grow on the metal surface, thereby improving the corrosion resistance of the metal surface.

[0051] In another aspect, the application provides an application of the high-efficiency rust-proof oil. The rust-proof oil is the high-efficiency rust-proof oil described above or prepared by the method described above. The rust-proof oil is applied in the field of metal rust prevention. More preferably, the high-efficiency rust-proof oil is applied to the corrosion resistance of the surface of the aluminum alloy.

[0052] The technical solutions of the application are illustrated in detail below with specific examples. Example 1

[0053] A preparation method of a high-efficiency rust-proof oil, the preparation method comprising the following steps:

[0054] (1) According to the weight parts, 10# white oil and 32# white oil are added into a container, heated to 50°C, and first stirred for 10min to obtain a base oil;

[0055] (2) Add rust inhibitor, corrosion inhibitor, antioxidant, metal passivator and film forming agent into the base oil in turn, and carry out second stirring for 0.5 h at 50℃ constant temperature to obtain rust-proof oil.

[0056] The rotating speed of the first stirring and the second stirring is controlled at 300 r / min.

[0057] The base oil is 60 parts by weight, the rust inhibitor is 1 part by weight, the corrosion inhibitor is 15 parts by weight, the antioxidant is 1 part by weight, the metal passivator is 0.5 part by weight and the film forming agent is 1 part by weight.

[0058] The base oil includes 10# white oil and 32# white oil with a weight ratio of 1:0.5, the rust inhibitor is calcium petroleum sulfonate, the corrosion inhibitor is sodium mercaptobenzothiazole, the antioxidant is dilauryl thiodipropionate, the film forming agent is lanolin and the metal passivator is benzotriazole. Example 2

[0059] A preparation method of high-efficiency rust-proof oil, the preparation method comprising the following steps:

[0060] (1) Add 10# white oil and 32# white oil into a container according to parts by weight, heat to 55℃, carry out first stirring for 20 min to obtain base oil;

[0061] (2) Add rust inhibitor, corrosion inhibitor, antioxidant, metal passivator and film forming agent into the base oil in turn, and carry out second stirring for 1.2 h at 55℃ constant temperature to obtain rust-proof oil.

[0062] The rotating speed of the first stirring and the second stirring is controlled at 500 r / min.

[0063] The base oil is 70 parts by weight, the rust inhibitor is 2.5 parts by weight, the corrosion inhibitor is 20 parts by weight, the antioxidant is 2 parts by weight, the metal passivator is 1.3 parts by weight and the film forming agent is 2 parts by weight.

[0064] The base oil includes 10# white oil and 32# white oil with a weight ratio of 1:1.5, the rust inhibitor is sodium petroleum sulfonate, the corrosion inhibitor is sodium mercaptobenzothiazole, the antioxidant is distearyl thiodipropionate, the film forming agent is vaseline and the metal passivator is benzotriazole. Example 3

[0065] A preparation method of high-efficiency rust-proof oil, the preparation method comprising the following steps:

[0066] (1) Add 10# white oil and 32# white oil into a container according to parts by weight, heat to 50-60℃, carry out first stirring for 10-30 min to obtain base oil;

[0067] (2) the rust inhibitor, the corrosion inhibitor, the antioxidant, the metal passivator and the film forming agent are sequentially added into the base oil, and second stirring is carried out at 50-60℃ constant temperature for 0.5-1.5h, to obtain the rust-proof oil.

[0068] The rotating speed of the first stirring and the second stirring is controlled at 300-800r / min.

[0069] The base oil is 60-80 parts by weight, the rust inhibitor is 1-4 parts by weight, the corrosion inhibitor is 15-25 parts by weight, the antioxidant is 1-3 parts by weight, the metal passivator is 0.5-2 parts by weight, and the film forming agent is 1-3 parts by weight.

[0070] The base oil includes 10# white oil and 32# white oil with a weight ratio of 1:0.5-2, the rust inhibitor is sodium petroleum sulfonate or sodium dodecylbenzenesulfonate, the corrosion inhibitor is sodium mercaptobenzothiazole, the antioxidant is distearyl thiodipropionate, the film forming agent is lanolin magnesium soap, and the metal passivator is benzotriazole. Example 4

[0071] A preparation method of the high-efficiency rust-proof oil, the preparation method comprises the following steps:

[0072] The difference from example 2 is that:

[0073] (2) the rust inhibitor, the corrosion inhibitor, the antioxidant, the metal passivator and the film forming agent are sequentially added into the base oil, and second stirring is carried out at 55℃ constant temperature for 1.2h, then 1,4-diaminoanthraquinone and methyl octanoate are added, third stirring is carried out at 65℃ for 30min, and the mixture is obtained after natural cooling to room temperature, the fourth stirring is carried out on the mixture, and triethanolamine is added dropwise into the mixture to adjust the pH value of the mixture to 7.2, to obtain the high-efficiency rust-proof oil.

[0074] The 1,4-diaminoanthraquinone is 0.3 parts by weight, and the methyl octanoate is 0.25 parts by weight.

[0075] The rotating speed of the third stirring and the fourth stirring is controlled at 400r / min. Example 5

[0076] A preparation method of the high-efficiency rust-proof oil, the preparation method comprises the following steps:

[0077] The difference from example 2 is that:

[0078] (2) the rust inhibitor, corrosion inhibitor, antioxidant, metal passivator and film forming agent are sequentially added to the base oil, second stirring is carried out at 55℃ constant temperature for 1.2h, then 1,4-diaminoanthraquinone and methyl octanoate are added, third stirring is carried out at 65℃ for 30-45min, after natural cooling to room temperature, a mixture is obtained, the mixture is subjected to fourth stirring, and triethanolamine is added dropwise into the mixture, the pH value of the mixture is adjusted to 7.4, and high-efficiency rust-proof oil is obtained.

[0079] The 1,4-diaminoanthraquinone is 0.4 parts by weight, and the methyl octanoate is 0.5 parts by weight.

[0080] The rotating speed of the third stirring and the fourth stirring is controlled at 600r / min. Example 6

[0081] A preparation method of high-efficiency rust-proof oil, the preparation method comprises the following steps:

[0082] The difference from example 2 is that:

[0083] (2) the rust inhibitor, corrosion inhibitor, antioxidant, metal passivator and film forming agent are sequentially added to the base oil, second stirring is carried out at 55℃ constant temperature for 1.2h, then 1,4-diaminoanthraquinone and methyl octanoate are added, third stirring is carried out at 65℃ for 30-45min, after natural cooling to room temperature, a mixture is obtained, the mixture is subjected to fourth stirring, and triethanolamine is added dropwise into the mixture, the pH value of the mixture is adjusted to 7.4, and high-efficiency rust-proof oil is obtained.

[0084] The 1,4-diaminoanthraquinone is 0.4 parts by weight, and the methyl octanoate is 0.5 parts by weight.

[0085] The rotating speed of the third stirring and the fourth stirring is controlled at 600r / min.

[0086] Experimental example 1

[0087] Salt fog resistance performance test of rust inhibitor on metal surface

[0088] Common 2024 aluminum alloy and 7075 aluminum alloy are selected as experimental test pieces, the test pieces are washed with acetone for 3 times, naturally dried, soaked in the rust inhibitor provided in example 2 and example 5 for 1min, and the salt fog resistance experiment is carried out according to the method of standard GB / T 10125-2021 “Artificial atmosphere corrosion test-salt spray test”, the surface corrosion of the test pieces is as shown in Figure 1 , Figure 1 The real object pictures of the test pieces after 12h, 24h and 48h of salt fog resistance experiment in the rust inhibitor provided in example 2 and example 5 are shown in

[0089] At the same time, the same method is used to provide the rust inhibitor of Example 5 for long time salt spray test (36 days), and the corrosion condition of the surface of the test piece is observed, and the results are shown in Figure 2 .

[0090] In combination Figure 1 , Figure 2 It can be seen that the rust inhibitor provided by the application has good rust prevention performance, and can be applied to the field of marine corrosion prevention of metal. By dispersing the rust inhibitor, the corrosion inhibitor, the antioxidant, the metal passivator and the film forming agent in the base oil according to the weight parts, a uniform and stable rust inhibitor is formed. The rust inhibitor acts on the metal surface, and the components are compatible and synergistic with each other, and a dense, continuous and stable protective film is formed on the metal surface, which acts as a barrier to isolate the direct contact between the metal and the corrosion medium, and reduces the corrosion of the metal surface.

[0091] Observation Figure 1 It can be seen that the surface of the aluminum alloy test piece in Example 2 and Example 5 still remains smooth, and no obvious rust spots appear, while the blank group is only base oil, and the surface of the aluminum alloy test piece in the blank group has rust spots after 24 hours, and the rust spots become more obvious with time. It shows that the rust prevention performance of the rust oil provided by the application on the aluminum alloy test piece is obviously better than that of the blank group. At the same time, as shown in Figure 2 , the rust inhibitor provided in Example 5 is subjected to a 36-day salt spray test, and it is found that a small amount of rust spots appear on the surface of the aluminum alloy test piece after 20 days, which come from the hanging rope at the top of the test piece, and no rust spots are found on the whole surface of the test piece. In combination Figure 1 , it is shown that the addition of 1,4-diaminoanthraquinone and methyl octanoate in the rust oil has a significant promoting effect on the rust prevention performance of the rust oil in the long-term salt spray environment.

[0092] By adding 1,4-diaminoanthraquinone and methyl octanoate to the rust oil, 1,4-diaminoanthraquinone contains a benzene ring and has electronegativity N. After the rust oil is coated on the metal surface, N in 1,4-diaminoanthraquinone can form a coordination bond with the active site on the surface of the aluminum alloy, and occupy the active site on the metal surface, and synergize with other components to form a protective film on the metal surface, avoiding the contact between the metal surface and the corrosion medium. At the same time, the structure of methyl octanoate contains long-chain alkyl, which has a certain hydrophobicity, which can improve the hydrophobicity of the protective film formed by the rust oil, further reducing the contact between water in the corrosion medium and the metal. At the same time, 1,4-diaminoanthraquinone and each component are adsorbed on the metal surface through intermolecular hydrogen bond and coordination bond to form a protective film, and the long-chain alkyl of methyl octanoate is closely arranged and assembled, improving the density of the protective film. The synergistic effect of each component further improves the mechanical strength and stability of the protective film, which is helpful to the corrosion and wear resistance of the metal surface.

[0093] Experimental Example 2

[0094] Wear resistance test of rust inhibitor coated on metal surface

[0095] The friction performance of Example 2, Example 5 and the blank group was tested using a CSM friction and wear tester (Antonpa, CSM, TRB3, Switzerland) under the experimental conditions of a load of 10 N, a frequency of 2 Hz, a friction range of 5 mm, and a friction time of 10 min, and the wear volume was measured using a confocal microscope (DCM8). The results are shown in Table 1.

[0096] Table 1

[0097]

[0098] As can be seen from Table 1, the rust inhibitor provided by the present application not only has excellent friction reducing performance, but also has good wear resistance. As can be seen from Example 1 to Example 3, by adding the rust inhibitor, the corrosion inhibitor, the antioxidant, the metal passivator and the film forming agent to the base oil, and applying the rust inhibitor to the metal surface, the components are compatible and synergistic with each other, and can penetrate into the gaps on the metal surface, and form a dense, continuous and stable protective film on the metal surface, greatly improving the wear resistance of the rust inhibitor on the metal surface, and helping the long-term stable operation of the equipment.

[0099] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that; it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A high-efficiency rust-preventive oil, characterized in that, The rust-preventive oil comprises the following components by weight: The composition includes 60-80 parts by weight of base oil, 1-4 parts by weight of rust inhibitor, 15-25 parts by weight of corrosion inhibitor, 1-3 parts by weight of antioxidant, 0.5-2 parts by weight of metal passivator, 1-3 parts by weight of film-forming agent, 0.3-0.45 parts by weight of 1,4-diaminoanthraquinone, and 0.25-0.75 parts by weight of methyl octanoate.

2. The high-efficiency rust-preventive oil according to claim 1, characterized in that, The base oils include No. 10 white oil and No. 32 white oil, with the weight ratio of No. 10 white oil to No. 32 white oil being 1:0.5-2.

3. The high-efficiency rust-preventive oil according to claim 1, characterized in that, The rust inhibitor includes calcium petroleum sulfonate and / or sodium petroleum sulfonate.

4. The high-efficiency rust-preventive oil according to claim 1, characterized in that, The corrosion inhibitor is sodium mercaptobenzothiazole.

5. The high-efficiency rust-preventive oil according to any one of claims 1, characterized in that, The antioxidant is dilaurate thiodipropionate or distearate thiodipropionate.

6. The high-efficiency rust-preventive oil according to claim 1, characterized in that, The film-forming agent includes one or more of lanolin, petrolatum, and lanolin magnesium soap.

7. The high-efficiency rust-preventive oil according to claim 1, characterized in that, The metal passivating agent includes benzotriazole or benzotriazole derivatives.

8. A method for preparing a high-efficiency rust-preventive oil, characterized in that, This preparation method is used to prepare the high-efficiency rust-preventive oil according to any one of claims 1-7, and the preparation method includes the following steps: (1) Add the No. 10 white oil and the No. 32 white oil to a container according to the weight, heat to 50-60°C, and stir for 10-30 minutes to obtain the base oil; (2) The rust inhibitor, corrosion inhibitor, antioxidant, metal passivator and film-forming agent are added to the base oil in sequence, and stirred for a second time at a constant temperature of 50-60℃ for 0.5-1.5h. Then 1,4-diaminoanthraquinone and methyl octanoate are added, and stirred for a third time at 65-78℃ for 30-45min. After naturally cooling to room temperature, a mixture is obtained. The mixture is stirred for a fourth time, and triethanolamine is added dropwise to the mixture to adjust the pH value of the mixture to 7.2-7.5 to obtain the rust-preventive oil.

9. The method for preparing the high-efficiency rust-preventive oil according to claim 8, characterized in that, The rotation speeds of the first and second stirring are controlled at 300-800 r / min.

10. An application of a high-efficiency rust-preventive oil, characterized in that, The rust-preventive oil is the high-efficiency rust-preventive oil according to any one of claims 1-7, or the rust-preventive oil prepared by the method according to claim 8 or 9; the rust-preventive oil is applied in the field of metal rust prevention.

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