Efficient anti-rust oil as well as preparation method and application thereof

Abstract

The invention provides efficient anti-rust oil as well as a preparation method and application thereof, and the anti-rust oil comprises the following components in parts by weight: 60-80 parts of base oil, 1-4 parts of an anti-rust agent, 15-25 parts of a corrosion inhibitor, 1-3 parts of an antioxidant, 0.5-2 parts of a metal deactivator and 1-3 parts of a film-forming agent. The preparation method comprises the following steps: adding 10 # white oil and 32 # white oil into a container in parts by weight, heating to 50-60 DEG C, and stirring for the first time for 10-30 minutes to obtain base oil; and sequentially adding the antirust agent, the corrosion inhibitor, the antioxidant, the metal deactivator and the film-forming agent into the base oil, and carrying out secondary stirring at a constant temperature of 50-60 DEG C for 0.5-1.5 h to obtain the antirust oil. The anti-rust oil is applied to the field of metal rust prevention. The high-efficiency anti-rust oil provided by the invention greatly improves the corrosion resistance to the metal surface.

Description

Technical Field

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

[0002] With the development of mechanical automation, the wear and corrosion of metal parts in equipment have attracted more and more attention. Anti-rust oil is mainly used to prevent metal products and products with metal as the main material from rusting. Anti-rust oil can produce a protective film on the metal surface, blocking oxygen, water and other corrosive media from contacting the metal, thereby reducing the occurrence of corrosion reactions. At the same time, anti-rust oil also has good lubrication properties to reduce friction and wear between metal surfaces.

[0003] Aluminum alloy is one of the metals with the largest usage and the widest application range. It has the characteristics of light weight, high mechanical properties, good thermal and electrical conductivity, and is widely used in the fields of petroleum, aviation, and light industry. In the prior art, anti-rust oil is coated on the surface of aluminum alloy to form an anti-rust film layer on the surface of aluminum alloy to slow down the corrosion of aluminum alloy. However, due to the active nature of aluminum, it will be exposed to the external environment during long-term use and storage, resulting in corrosion reactions between the more active metal aluminum and pollutants. These corrosion reactions will destroy the anti-rust film on the surface of the aluminum alloy, causing large-scale corrosion on the surface of the aluminum alloy, resulting in a short service life of the anti-rust oil, requiring regular re-application of the anti-rust oil, and affecting the stable operation of aluminum alloy equipment. Summary of the invention

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

[0005] On the one hand, the present application provides a high-efficiency anti-rust oil, which comprises the following components by weight:

[0006] 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 and 1-3 parts by weight of film former.

[0007] 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.

[0008] Optionally, the rust inhibitor includes 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 former includes one or more of lanolin, petrolatum and lanolin magnesium soap.

[0012] Optionally, the metal deactivator comprises benzotriazole or a benzotriazole derivative.

[0013] On the other hand, the present application provides a method for preparing a high-efficiency rust-proof oil, which is used to prepare the high-efficiency rust-proof oil according to any one of claims 1 to 7, and the preparation method comprises the following steps:

[0014] (1) Add No. 10 white oil and No. 32 white oil by weight into a container, heat to 50-60° C., and stir for 10-30 minutes to obtain a base oil;

[0015] (2) Add the rust preventive, corrosion inhibitor, antioxidant, metal passivator and film-forming agent to the base oil in sequence, and stir for a second time at a constant temperature of 50-60° C. for 0.5-1.5 h to obtain the rust preventive oil.

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

[0017] On the other hand, the present application provides an application of a high-efficiency rust-proof oil, which is the high-efficiency rust-proof oil mentioned above, or the rust-proof oil prepared by the above-mentioned method; the rust-proof oil is applied to the field of metal rust prevention.

[0018] The high-efficiency anti-rust oil and its preparation method and application provided in this application realize the preparation and application of anti-rust oil, and have the following beneficial effects compared with the prior art:

[0019] (1) By dispersing the rust inhibitor, corrosion inhibitor, antioxidant, metal passivator and film-forming agent in the base oil by weight, 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 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 corrosive medium, thereby reducing the corrosion of the metal surface. At the same time, by selecting the above-mentioned appropriate ratio, the protective film formed on the metal surface is more dense and can penetrate into the gaps on the metal surface, further reducing the active sites on the aluminum alloy surface, greatly improving the anti-corrosion efficiency, and contributing to the long-term stable operation of the equipment.

[0020] (2) By mixing No. 10 white oil and No. 32 white oil in proportion as the base oil, the permeability and lubricity of the rust inhibitor can be improved, which helps the rust inhibitor to better penetrate into the gaps on the metal surface, improve the density and stability of the metal surface protective film, and reduce the activity of the active centers on the surface of the aluminum alloy, thereby reducing the corrosion of the aluminum alloy.

[0021] (3) By adding 1,4-diaminoanthraquinone and methyl octanoate to the rust-proof oil, 1,4-diaminoanthraquinone contains a benzene ring and electronegative N. After the rust-proof oil is applied to the metal surface, the N in 1,4-diaminoanthraquinone can form a coordination bond with the active site on the surface of the aluminum alloy, occupying the active site on the metal surface, and synergistically with other components to form a protective film on the metal surface, thereby avoiding the contact between the metal surface and the corrosive medium. At the same time, the structure of 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, further reducing the contact between water in the corrosive medium and the metal. At the same time, 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 of methyl octanoate is closely arranged and assembled, which improves 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 for 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. The appropriate pH value helps the active groups in the rust inhibitor to react with the metal surface, making it easier for the protective film to grow on the metal surface, thereby improving the corrosion protection 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 THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

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

[0025] Figure 2 This is a salt spray resistance test diagram of the rust inhibitor provided in Example 5 of the present application. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0027] On the one hand, the present application provides a high-efficiency anti-rust oil, which comprises the following components by weight:

[0028] 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 and 1-3 parts by weight of film former.

[0029] Specifically, the base oil is used as the main component of the rust-proof oil. On the one hand, the base oil acts as a carrier to evenly disperse other components, thereby improving the rust-proof effect. On the other hand, the base oil is physically adsorbed 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 extend the service life of the equipment. The rust inhibitor 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, and slowing down the oxidation and rust rate of the metal. The corrosion inhibitor can prevent the diffusion of water, oxygen and other corrosive ions in the corrosive medium to the metal surface, and play a corrosion-inhibiting role. The antioxidant is dispersed in the base oil, decomposes hydroperoxides, captures free radicals, reduces oxidation reactions, and synergizes with other components to form a protective film, isolates the aluminum alloy surface from contact with the corrosive medium, and prevents the oxidation reaction between the protective film on the metal surface and the corrosive medium, thereby extending the service life of the rust inhibitor, thereby protecting the metal surface and extending the service life of the metal equipment.

[0030] Metal passivators can form a uniform and dense oxide film or passivation film on the metal surface, change the electrochemical properties of the metal surface, make the metal in an electrochemically inert state, slow down the electrochemical reaction between the metal surface and the surrounding medium, and thus prevent the occurrence of chemical or electrochemical corrosion reactions. Film-forming agents play a protective role by forming an isolation film on the metal surface. They can strengthen the strength of the protective film and prevent the rust-proof oil from being washed away by condensed dew in salt spray and hot and humid environments, thereby improving the adhesion and strength of the rust-proof agent on the metal surface.

[0031] By dispersing the rust inhibitor, corrosion inhibitor, antioxidant, metal passivator and film former in the base oil by weight, 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 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 corrosive medium, thereby reducing the corrosion of the metal surface. At the same time, by selecting the above-mentioned appropriate ratio, the protective film formed on the metal surface is more dense and can penetrate into the gaps on the metal surface, further reducing the active sites on the aluminum alloy surface, greatly improving the anti-corrosion efficiency, and contributing to 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, white oil has good chemical properties and stability, is not easy to deteriorate, has a long shelf life, and does not contain wax and impurities. It can form a protective film on the metal surface to isolate oxygen and water, thereby preventing the metal surface from rusting. No. 10 white oil has moderate viscosity and is often used for light-load, low-speed mechanical equipment. No. 32 white oil has a higher viscosity and is suitable for lubrication under heavy-load, high-speed, and high-temperature environments. By mixing No. 10 white oil and 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 gaps on the metal surface, improve the density and stability of the metal surface protective film, reduce the activity of the aluminum alloy surface, and thus reduce the corrosion of the aluminum alloy.

[0034] By mixing No. 10 white oil and No. 32 white oil in a weight ratio of 1:0.5-2 and formulating with other components, the components act synergistically to jointly improve the corrosion protection of the aluminum alloy surface.

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

[0036] Specifically, calcium petroleum sulfonate / sodium petroleum sulfonate is an oil-soluble surfactant that can promote the adsorption and dispersion of rust inhibitors on metal surfaces, and has good salt water corrosion resistance and sweat replacement properties, which helps to improve the stability of the protective film formed by the rust inhibitor on the metal surface, thereby achieving rust prevention on the metal surface. At the same time, it also has good extreme pressure properties and high thermal stability, and works synergistically with other components, making it suitable for working conditions such as high temperature and other conditions.

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

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

[0039] Specifically, the antioxidant prevents oxidation of components in the rust inhibitor by decomposing hydroperoxides, reduces oxidation reactions, and simultaneously synergizes with other components to form a protective film, thereby extending the service life of the equipment.

[0040] Optionally, the film former includes one or more of lanolin, petrolatum and lanolin magnesium soap.

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

[0042] On the other hand, the present application provides a method for preparing a high-efficiency anti-rust oil, which is used to prepare the above-mentioned high-efficiency anti-rust oil, and the preparation method comprises the following steps:

[0043] (1) Add No. 10 white oil and No. 32 white oil by weight into a container, heat to 50-60° C., and stir for 10-30 minutes to obtain a base oil;

[0044] (2) Add the rust preventive, corrosion inhibitor, antioxidant, metal passivator and film-forming agent to the base oil in sequence, and stir for a second time at a constant temperature of 50-60° C. for 0.5-1.5 h to obtain the rust preventive oil.

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

[0046] Specifically, firstly, No. 10 white oil and No. 32 white oil are added to a container, stirred at 50-60°C to fully mix the two base oils, and then the rust inhibitor, corrosion inhibitor, antioxidant, metal passivator and film former are added to the base oil in sequence, and stirred to make each component evenly dispersed in the base oil until transparent, thus obtaining a high-efficiency rust-proof oil. Controlling the rotation speed of the first stirring and the second stirring allows each component to be mixed more efficiently, which helps to improve the uniformity of the rust inhibitor, thereby improving the stability and strength of the protective film formed by the rust inhibitor on the metal surface, and is conducive to improving the rust-proof efficiency of the metal surface.

[0047] The present application realizes the preparation of high-efficiency anti-rust oil through the above scheme, by heating and mixing No. 10 white oil and No. 32 white oil, and then sequentially adding rust inhibitor, corrosion inhibitor, antioxidant, metal passivator and film former to base oil, stirring so that each component is evenly dispersed in the base oil, and obtaining high-efficiency anti-rust oil. The components cooperate with each other to form a dense, stable and continuous protective film on the metal surface, isolating the direct contact between the corrosive medium and the metal surface, and can also improve the stability of the protective film on the metal surface, which is conducive to improving the anti-rust efficiency of the metal surface.

[0048] Furthermore, the high-efficiency anti-rust oil provided in the present application also includes 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: adding a rust inhibitor, a corrosion inhibitor, an antioxidant, a metal passivator and a film-forming agent to the base oil in sequence, stirring at a constant temperature of 50-60°C for 0.5-1.5h, then adding 1,4-diaminoanthraquinone and methyl octanoate, stirring for a third time at 65-78°C for 30-45min, cooling naturally to room temperature to obtain a mixture, stirring the mixture for a fourth time, and dripping triethanolamine into the mixture, adjusting the pH value of the mixture to 7.2-7.5, and obtaining the high-efficiency rust-proof oil. The speed of the third stirring and the fourth stirring is controlled at 400-850r / min.

[0050] By adding 1,4-diaminoanthraquinone and methyl octanoate to the rust-proof oil, 1,4-diaminoanthraquinone contains benzene rings and electronegative N. After the rust-proof oil is applied to the metal surface, the N in 1,4-diaminoanthraquinone can generate coordination bonds with the active sites on the surface of the aluminum alloy, occupying the active sites on the metal surface, and synergistically with other components to form a protective film on the metal surface, avoiding the contact between the metal surface and the corrosive medium, and the presence of the benzene ring is conducive to improving the stability and mechanical strength of the protective film. At the same time, the structure of methyl octanoate contains long-chain alkyl groups, which has a certain hydrophobicity, can improve the hydrophobicity of the protective film formed by the rust-proof oil, further reduce the contact between water in the corrosive medium and the metal, and at the same time, 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 groups of methyl octanoate are closely arranged and assembled, which improves 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 conducive 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. The appropriate pH value helps the active groups in the rust inhibitor to react with the metal surface, making it easier for the protective film to grow on the metal surface, thereby improving the corrosion protection of the metal surface.

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

[0052] The technical solution of the present application is described in detail below with reference to specific embodiments.

[0053] Example 1

[0054] A method for preparing high-efficiency anti-rust oil, the preparation method comprising the following steps:

[0055] (1) No. 10 white oil and No. 32 white oil were added to a container according to weight, heated to 50° C., and stirred for 10 minutes to obtain a base oil;

[0056] (2) Adding a rust preventive, a corrosion inhibitor, an antioxidant, a metal passivator and a film-forming agent to the base oil in sequence, and performing a second stirring at a constant temperature of 50° C. for 0.5 h to obtain a rust preventive oil.

[0057] The rotation speed of the first stirring and the second stirring was controlled at 300 r / min.

[0058] Among them, 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.

[0059] The base oil includes No. 10 white oil and No. 32 white oil in 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.

[0060] Example 2

[0061] A method for preparing high-efficiency anti-rust oil, the preparation method comprising the following steps:

[0062] (1) No. 10 white oil and No. 32 white oil were added to a container according to weight, heated to 55° C., and stirred for 20 minutes to obtain a base oil;

[0063] (2) Add the rust preventive, corrosion inhibitor, antioxidant, metal passivator and film-forming agent to the base oil in sequence, and perform a second stirring at a constant temperature of 55° C. for 1.2 h to obtain the rust preventive oil.

[0064] The rotation speed of the first stirring and the second stirring was controlled at 500 r / min.

[0065] Among them, 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.

[0066] The base oil includes No. 10 white oil and No. 32 white oil in 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.

[0067] Example 3

[0068] A method for preparing high-efficiency anti-rust oil, the preparation method comprising the following steps:

[0069] (1) Add No. 10 white oil and No. 32 white oil by weight into a container, heat to 50-60° C., and stir for 10-30 minutes to obtain a base oil;

[0070] (2) Add the rust preventive, corrosion inhibitor, antioxidant, metal passivator and film-forming agent to the base oil in sequence, and perform a second stirring at a constant temperature of 50-60° C. for 0.5-1.5 h to obtain the rust preventive oil.

[0071] The rotation speed of the first stirring and the second stirring is controlled at 300-800r / min.

[0072] Among them, 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.

[0073] The base oil includes No. 10 white oil and No. 32 white oil in a weight ratio of 1:0.5-2, the rust inhibitor is or sodium petroleum sulfonate, 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.

[0074] Example 4

[0075] A method for preparing high-efficiency anti-rust oil, the preparation method comprising the following steps:

[0076] The difference from Example 2 is:

[0077] (2) A rust preventive, a corrosion inhibitor, an antioxidant, a metal passivator and a film-forming agent are sequentially added to the base oil, and the mixture is stirred for a second time at a constant temperature of 55° C. for 1.2 h. 1,4-diaminoanthraquinone and methyl octanoate are then added, and the mixture is stirred for a third time at 65° C. for 30 min. After naturally cooling to room temperature, a mixture is obtained, and the mixture is stirred for a fourth time. Triethanolamine is added dropwise to the mixture, and the pH value of the mixture is adjusted to 7.2 to obtain a high-efficiency rust preventive oil.

[0078] Among them, 1,4-diaminoanthraquinone is 0.3 parts by weight, and methyl octanoate is 0.25 parts by weight.

[0079] The rotation speed of the third stirring and the fourth stirring is controlled at 400r / min.

[0080] Example 5

[0081] A method for preparing high-efficiency anti-rust oil, the preparation method comprising the following steps:

[0082] The difference from Example 2 is:

[0083] (2) A rust preventive, a corrosion inhibitor, an antioxidant, a metal passivator and a film-forming agent are sequentially added to the base oil, and the mixture is stirred for a second time at a constant temperature of 55° C. for 1.2 hours. Then, 1,4-diaminoanthraquinone and methyl octanoate are added, and the mixture is stirred for a third time at 65° C. for 30-45 minutes. After naturally cooling to room temperature, a mixture is obtained, and the mixture is stirred for a fourth time. Triethanolamine is added dropwise to the mixture, and the pH value of the mixture is adjusted to 7.4 to obtain a high-efficiency rust preventive oil.

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

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

[0086] Example 6

[0087] A method for preparing high-efficiency anti-rust oil, the preparation method comprising the following steps:

[0088] The difference from Example 2 is:

[0089] (2) A rust preventive, a corrosion inhibitor, an antioxidant, a metal passivator and a film-forming agent are sequentially added to the base oil, and the mixture is stirred for a second time at a constant temperature of 55° C. for 1.2 h. 1,4-diaminoanthraquinone and methyl octanoate are then added, and the mixture is stirred for a third time at 78° C. for 45 min. After naturally cooling to room temperature, a mixture is obtained, and the mixture is stirred for a fourth time. Triethanolamine is added dropwise to the mixture, and the pH value of the mixture is adjusted to 7.5 to obtain a high-efficiency rust preventive oil.

[0090] Among them, 1,4-diaminoanthraquinone is 0.45 parts by weight, and methyl octanoate is 0.75 parts by weight.

[0091] The rotation speed of the third stirring and the fourth stirring is controlled at 850r / min.

[0092] Experimental Example 1

[0093] Salt spray resistance test of rust inhibitor on metal surface

[0094] Commonly used 2024 aluminum alloy and 7075 aluminum alloy were selected as experimental specimens, rinsed with acetone three times, and naturally dried. The specimens were immersed in the rust inhibitor provided in Example 2 and Example 5 for 1 min, and the salt spray resistance test was carried out according to the method of standard GB / T 10125-2021 "Artificial atmosphere corrosion test-Salt spray test". The surface corrosion of the specimens is as follows: Figure 1 As shown, Figure 1 The pictures in the figure are the actual pictures of the test pieces after 12h, 24h and 48h of the salt spray resistance test with the rust inhibitors provided in Examples 2 and 5. The blank group is the actual picture of the salt spray resistance of the test pieces that were not immersed in the rust inhibitor.

[0095] At the same time, the same method was used to conduct a long-term salt spray resistance test (36 days) on the rust inhibitor provided in Example 5, and the corrosion condition of the test piece surface was observed. The results are as follows: Figure 2 shown.

[0096] Combination Figure 1 , Figure 2 It can be clearly seen that the rust inhibitor provided by the present application has good rust prevention performance and can be applied to the field of marine corrosion protection of metals. The rust inhibitor, corrosion inhibitor, antioxidant, metal passivator and film former are dispersed in the base oil by weight to form a uniform and stable rust inhibitor, 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 corrosive medium, thereby reducing the corrosion of the metal surface.

[0097] By adding 1,4-diaminoanthraquinone and methyl octanoate to the rust-proof oil, 1,4-diaminoanthraquinone contains a benzene ring and electronegative N. After the rust-proof oil is applied to the metal surface, the N in 1,4-diaminoanthraquinone can generate coordination bonds with the active sites on the surface of the aluminum alloy, occupying the active sites on the metal surface, and synergistically with other components to form a protective film on the metal surface, thereby avoiding the contact between the metal surface and the corrosive medium. At the same time, the structure of methyl octanoate contains long-chain alkyl groups, which have a certain hydrophobicity, and can improve the hydrophobicity of the protective film formed by the rust-proof oil, further reducing the contact between water in the corrosive medium and the metal. At the same time, 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 groups of methyl octanoate are closely arranged and assembled, thereby improving 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 for the corrosion and wear resistance of the metal surface.

[0098] Experimental Example 2

[0099] Wear resistance test of rust inhibitor applied on metal surface

[0100] 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.

[0101] Table 1

[0102] Average friction coefficient <![CDATA[Average wear volume μm -3 > Example 1 0.123 <![CDATA[2.15×10 4 ]]> Example 2 0.098 <![CDATA[1.36×10 4 ]]> Example 3 0.102 <![CDATA[1.21×10 4 ]]> Example 4 0.092 <![CDATA[7.83×10 3 ]]> Example 5 0.089 <![CDATA[5.11×10 3 ]]> Example 6 0.091 <![CDATA[5.14×10 3 ]]> Blank Group 0.217 <![CDATA[2.86×10 6 ]]>

[0103] It can be seen from Table 1 that the rust inhibitor provided by the present application not only has excellent friction reduction performance, but also has good anti-wear performance. Observing Examples 1 to 3, by adding rust inhibitor, corrosion inhibitor, antioxidant, metal passivator and film-forming agent to the base oil, and applying the rust inhibitor to the metal surface, the components are compatible with each other and act synergistically, and can penetrate into the gaps on the metal surface, and together form a dense, continuous and stable protective film on the metal surface, which greatly improves the wear resistance of the rust inhibitor on the metal surface and contributes to the long-term stable operation of the equipment.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A high-efficiency anti-rust oil, characterized in that: The anti-rust oil comprises the following components by weight: 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 and 1-3 parts by weight of film former.

2. The high-efficiency anti-rust oil according to claim 1, characterized in that: The base oil includes 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.

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

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

5. The high-efficiency anti-rust oil according to any one of claim 1, characterized in that: The antioxidant is dilauryl thiodipropionate or distearyl thiodipropionate.

6. The high-efficiency anti-rust oil according to claim 1, characterized in that: The film former includes one or more of lanolin, vaseline and lanolin magnesium soap.

7. The high-efficiency anti-rust oil according to claim 1, characterized in that: The metal deactivator includes benzotriazole or a benzotriazole derivative.

8. A method for preparing a high-efficiency anti-rust oil, characterized in that: The preparation method is used to prepare the high-efficiency anti-rust oil according to any one of claims 1 to 7, and the preparation method comprises the following steps: (1) adding the No. 10 white oil and the No. 32 white oil into a container according to weight, heating to 50-60° C., and performing a first stirring for 10-30 minutes to obtain the base oil; (2) The rust inhibitor, the corrosion inhibitor, the antioxidant, the metal passivator and the film-forming agent are sequentially added to the base oil, and stirred for a second time at a constant temperature of 50-60° C. for 0.5-1.5 h to obtain the rust-proof oil.

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

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

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