Lubricating anti-corrosion composition and application thereof in aviation field

Abstract

The invention provides a lubricating anti-corrosion composition and application thereof in the aviation field. The composition comprises the following components in percentage by weight: 73-95% of base oil; more than 0 wt% and less than or equal to 10 wt% of a corrosion inhibitor; 0 to 10 wt% of a viscosity index improver; 0-1 wt% of an antiwear agent; 0-1 wt% of a film forming agent; more than 0 wt% and less than or equal to 1 wt% of an antioxidant; more than 0 wt% and less than or equal to 1 wt% of a metal deactivator; 0-2% by weight of a dehydrating agent; 0-1 wt% of a dispersant; and 0 to 0.1 wt% of an antifoaming agent. The lubricating anti-corrosion composition developed by the invention is suitable for providing lubricating and anti-corrosion functions for various equipment operating under a low-temperature condition, has long-term, efficient and reliable lubricating and anti-corrosion protection for the equipment, and has the advantages of high flash point, excellent low-temperature fluidity and the like.

Description

Technical Field

[0001] The present application relates to the field of aviation, and more particularly to a new material suitable for use in aviation equipment. Background Art

[0002] Metal components in various devices inevitably face the problem of corrosion during use. This corrosion is a chemical deterioration phenomenon caused by the oxidation of metals under the influence of pollutants such as water vapor in the surrounding environment, salt spray in the marine environment, or sulfate particles in the urban environment. In the field of aviation, metal materials in aircraft structures, especially materials such as steel and aluminum alloys, are more susceptible to corrosion. Corrosion reduces the thickness and mechanical strength of materials on the aircraft, and also accelerates the development of fatigue cracks and stress corrosion cracking in safety-critical structural components of the aircraft, thereby affecting the structural strength of aircraft components and leading to catastrophic structural failures, seriously affecting the flight safety of the aircraft.

[0003] Corrosion not only directly affects flight safety, but also brings a heavy burden to maintenance work. Airlines need to spend huge amounts of maintenance costs to eliminate failures and hidden dangers caused by corrosion. Even so, the service life of the aircraft will be shortened due to corrosion problems. According to the statistics of the International Air Transport Association, the cost of regular maintenance and structural component replacement of aircraft due to corrosion is 10 - 20 US dollars per hour. Another report shows that the annual cost of corrosion-related inspections and repairs of aircraft by the air forces of some countries accounts for 23.6% of their total maintenance costs, with the specific amount exceeding 5 billion US dollars; and the anti-corrosion costs for some airlines with older aircraft can even account for half of the total structural maintenance costs.

[0004] Currently, a commonly adopted anti-corrosion measure is to apply (for example, by spraying, brushing, or dipping) anti-corrosion agents on equipment, components, or parts that require anti-corrosion protection. After the "water displacement type" anti-corrosion agent or corrosion inhibitor is applied to the target object (such as equipment, components, or parts), it can displace and remove the residual moisture and salts (such as water films, water droplets, fingerprints, sweat stains, small salt particles, etc.) on it, and at the same time form a layer of rust-preventive oil film on its surface (i.e., the so-called "water displacement"), protecting the metal from the erosion of moisture and corrosive gases, and thus has received wide attention. Especially in the aerospace field, water displacement type anti-corrosion agent / corrosion inhibitor materials with dehydration performance are the focus of research and development. People have invested a large amount of funds and energy in this research and development, but the research and development results so far have defects and cannot really be satisfactory.

[0005] For example, in order to achieve better water displacement performance, some existing water-displacing preservatives / corrosion inhibitors adopt low flash point components, resulting in poor safety and a great risk of causing fire or even explosion. In addition, the film formed by such products has very poor abrasion resistance and is not suitable for application in moving structural parts such as latches, hinges, and motors that have certain requirements for lubrication. In other studies, high flash point components are used for formulation. Although the problem of low flash point is solved, the water-displacing preservatives / corrosion inhibitors thus prepared often have very poor low temperature performance and cannot solve the problem of metal corrosion (such as the corrosion problems of metals such as chromium, copper, and magnesium used in aircraft), thus restricting their application in aircraft anti-corrosion.

[0006] That is to say, so far, no solution that can overcome all the above problems has been developed. People urgently hope to develop a brand-new water-displacing preservative / corrosion inhibitor that can provide extremely excellent lubrication and anti-corrosion functions for various equipment including aircraft, and preferably also has advantages such as high flash point, long effective life, high reliability, excellent low temperature flow performance, and good abrasion resistance. Summary of the Invention

[0007] In view of the above problems, the inventors of the present application have conducted a large number of in-depth studies and unexpectedly developed a lubricating and anti-corrosion composition with a specially designed formula, effectively solving the long-standing problems in the prior art.

[0008] In a first aspect of the present application, there is provided a lubricating and anti-corrosion composition. Based on the total weight of the composition, the composition comprises:

[0009] 73-95% by weight of base oil;

[0010] Greater than 0% by weight and less than or equal to 10% by weight of corrosion inhibitor;

[0011] 0-10% by weight of viscosity index improver;

[0012] 0-1% by weight of anti-wear agent;

[0013] 0-1% by weight of film-forming agent;

[0014] Greater than 0% by weight and less than or equal to 1% by weight of antioxidant;

[0015] Greater than 0% by weight and less than or equal to 1% by weight of metal deactivator;

[0016] 0-2% by weight of dehydrating agent;

[0017] 0-1% by weight of dispersant;

[0018] 0-0.1% by weight of defoamer.

[0019] According to an embodiment of the first aspect of the present application, based on the total weight of the composition, the composition contains 80-95% by weight of a base oil, preferably 82-95% by weight of a base oil. According to another embodiment of an aspect of the present application, the base oil is selected from at least one of the following: mineral base oil, naphthenic base oil, polyalphaolefin base oil, synthetic ester base oil. According to another embodiment of an aspect of the present application, the kinematic viscosity of the base oil at 40 °C is 1-25 mm 2 / s, the flash point is equal to or higher than 120 °C, and the pour point is equal to or lower than -40 °C.

[0020] According to another embodiment of the first aspect of the present application, the corrosion inhibitor is selected from at least one of the following: calcium aromatic sulfonate, calcium aliphatic sulfonate, calcium aromatic carboxylate, calcium aliphatic carboxylate.

[0021] According to another embodiment of the first aspect of the present application, the viscosity index improver is selected from at least one of the following: poly(alkyl) methacrylate, poly(alkyl) methacrylate copolymer, alkyl naphthalene, dialkyl fumarate / vinyl acetate copolymer.

[0022] According to another embodiment of the first aspect of the present application, the antiwear agent is selected from at least one of the following: isopropyl triphenyl phosphate, tert-butyl triphenyl phosphate, castor oil acid polylactone, 12-hydroxystearic acid polylactone, dimer acid ester, trimer acid ester.

[0023] According to another embodiment of the first aspect of the present application, the film-forming agent is selected from at least one of the following: petrolatum, oxidized wax ester, oxidized petroleum jelly, lanolin, lanolin magnesium soap, lanolin calcium soap, pentaerythritol ester of lanolin fatty acid.

[0024] According to another embodiment of the first aspect of the present application, the antioxidant is a phenolic antioxidant, an amine antioxidant or a combination thereof. According to another embodiment of the first aspect of the present application, the phenolic antioxidant is selected from one or more of the following: 2,6-di-tert-butyl-p-cresol, 4,4'-methylenebis(2,6-di-tert-butylphenol), 3,5-di-tert-butyl-4-hydroxyphenyl propionate, 2,4-dimethyl-6-tert-butylphenol, 2,6-di-tert-butylphenol and tert-butylphenol. According to another embodiment of the first aspect of the present application, the amine antioxidant is selected from one or more of the following: naphthylamine, diphenylamine, p-phenylenediamine, 2-octyldiphenylamine, 4-tert-butyl-N-phenylaniline, 4,4'-dioctyldiphenylamine, N,N-diphenyl-p-phenylenediamine, m-xylenediamine, 4-tert-butyldiphenylamine, octylbutyldiphenylamine, N-phenyl-α-naphthylamine, octylated phenyl-α-naphthylamine.

[0025] According to another embodiment of the first aspect of the present application, the metal passivator is selected from at least one of the following: benzotriazole, methylbenzotriazole, 1-[(bis(2-ethylhexyl)amino)methyl]-1H-1,2,4-triazole, thiadiazole, a complex of methylbenzotriazole-aldehyde-amine condensate and thiadiazole polysulfide compound, a complex of methylbenzotriazole-aldehyde-amine condensate and thiadiazole polysulfide compound, a complex of benzotriazole-aldehyde-amine condensate and N,N',N''-tris[1-(benzotriazolyl)alkyl]melamine, a complex of methylbenzotriazole-aldehyde-amine condensate and N,N',N''-tris[1-(benzotriazolyl)alkyl]melamine.

[0026] According to another embodiment of the first aspect of the present application, the dehydrating agent is selected from at least one of the following: propylene glycol monobutyl ether, ethylene glycol monobutyl ether, propylene glycol methyl ether, ethylene glycol methyl ether, propylene glycol ethyl ether, ethylene glycol ethyl ether, polyethylene glycol 400, polyethylene glycol 600, polyethylene glycol 1000, polyethylene glycol 2000.

[0027] According to another embodiment of the first aspect of the present application, the dispersant is selected from at least one of the following: polyisobutylene succinimide, borated polyisobutylene succinimide.

[0028] According to another embodiment of the first aspect of the present application, the defoaming agent is selected from at least one of the following: silicone oxygen alkane type defoaming agent, polyacrylate type defoaming agent, ether alcohol type defoaming agent.

[0029] The second aspect of the present application provides a method for lubricating and anti-corrosion treating equipment, the method comprising applying the lubricating anti-corrosion composition of the present invention to at least a part of the parts or components of the equipment. Examples of the equipment include: fixed-wing aircraft, helicopters, drones, space vehicles, ships, submarines, refrigeration equipment, automobiles, trains, outdoor power equipment, outdoor communication equipment.

[0030] In the following detailed description section, the composition, preparation method and uses of the present application are further introduced in conjunction with the accompanying drawings. Brief Description of the Drawings

[0031] Figure 1 Shows the lubricating anti-corrosion composition prepared in an embodiment of the present invention;

[0032] Figure 2 Shows the characterization picture of the wear scar diameter test of the lubricating anti-corrosion composition prepared in an embodiment of the present invention. Detailed Description of the Embodiments

[0033] The "ranges" disclosed herein are in the form of a lower limit and an upper limit. There can be one or more lower limits, and one or more upper limits respectively. A given range is defined by selecting a lower limit and an upper limit. The selected lower limit and upper limit define the boundaries of a particular range. All ranges that can be defined in this way are inclusive and combinable, that is, any lower limit can be combined with any upper limit to form a range. For example, if ranges of 60 - 120 and 80 - 110 are listed for a specific parameter, ranges of 60 - 110 and 80 - 120 are understood to be anticipated as well. Additionally, if the minimum range values 1 and 2 are listed, and if the maximum range values 3, 4, and 5 are listed, then the following ranges are all anticipated: 1 - 3, 1 - 4, 1 - 5, 2 - 3, 2 - 4, and 2 - 5.

[0034] In this application, unless otherwise specified, the numerical range "a - b" represents an abbreviated representation of any real number combination between a and b, where both a and b are real numbers. For example, the numerical range "0 - 5" means that all real numbers between "0 - 5" are fully listed herein, and "0 - 5" is just an abbreviated representation of these numerical combinations.

[0035] In this application, if there is no special instruction, all the embodiments and preferred embodiments mentioned herein can be combined with each other to form new technical solutions.

[0036] In this application, if there is no special instruction, all the technical features and preferred features mentioned herein can be combined with each other to form new technical solutions.

[0037] In this application, if there is no special instruction, the "including" mentioned herein means open-ended, and can also be closed-ended. For example, the "including" can mean that other components not listed can also be included, or it can only include the listed components.

[0038] In the present invention, "less than or equal to" means "less than or equal to" or "≤", and "greater than or equal to" means "greater than or equal to" or "≥".

[0039] The lubricating and anti-corrosion composition of the present invention has the "water displacement" property, that is to say, after the composition of this application is applied to the target object (such as the outer surface of an aircraft, the inside or outside of aircraft components, especially the surface of metal components) in any suitable manner, it can displace and remove the moisture and salts (such as water films, water droplets, fingerprints, sweat stains, small salt particles, etc.) remaining thereon, and at the same time form a layer of rust-preventive oil film on its surface (the so-called "water displacement"), protecting the metal from the erosion of moisture and corrosive gases.

[0040] One of the most important components contained in the lubricating and anticorrosive composition of the present invention is the base oil. The base oil is a general term for a large class of basic raw materials commonly used in lubricating oils, which are divided into five categories in total. Class I base oil is also known as mineral base oil and is usually obtained by refining crude oil; Class II base oil is usually prepared by a combined process (a combination of solvent process and hydrogenation process) and has a relatively low kinematic viscosity; Class III base oil is prepared by a full hydrogenation process and has a relatively low to medium kinematic viscosity; Class IV base oil refers to polyalpha-olefin synthetic oils with various degrees of polymerization, which have a higher kinematic viscosity and an extremely low pour point; Class V base oil includes other synthetic oils (synthetic hydrocarbons, esters, silicone oils, etc.), vegetable oils, recycled base oils, etc. other than the above Class I to Class IV. The most common synthetic base oils in the art include polyalpha-olefin (PAO) base oil, synthetic ester base oil, polyether base oil, alkylated aromatic base oil, etc. The synthesis of the above base oils is known in the art and has been widely commercialized.

[0041] According to an embodiment of the present application, the base oil used in the composition of the present invention is selected from at least one of the following: mineral base oil, naphthenic base oil, polyalpha-olefin base oil, synthetic ester base oil. According to another embodiment of the present application, a polyalpha-olefin base oil, or a mixture of two polyalpha-olefin base oils is used; or a mixture of a polyalpha-olefin (PAO) base oil and a Class II base oil is used; or a mixture of two synthetic ester base oils is used.

[0042] According to another embodiment of the present application, based on the total weight of the lubricating and anticorrosive composition, the total content of the base oil is 73-95% by weight, preferably 80-95% by weight, more preferably 82-95% by weight.

[0043] A technical breakthrough of the present application lies in the specially designed formula of the present invention. For example, the inventor found that if the specially defined base oil in the composition of the present invention is replaced with an equal amount of other types of lubricating oils, its performance will be significantly deteriorated and it cannot be compared with the lubricating and anticorrosive composition prepared according to the formula of the present invention at all.

[0044] In the field of base oils, molecular weight is usually not used for description, but kinematic viscosity, flash point and pour point are used to characterize the base oil. According to an embodiment of the present application, the kinematic viscosity of the base oil at 40 °C is 1-25 mm 2 / s, preferably 2-20 mm 2 / s, more preferably 5-19 mm 2 / s; the flash point is equal to or higher than 120 °C, preferably equal to or higher than 150 °C, such as 150 - 250 °C; the pour point is equal to or lower than -40 °C, preferably -40 °C to -70 °C, such as equal to or lower than -50 °C. The above properties can be measured according to standard methods known in the art. For example, the kinematic viscosity can be measured according to ASTM D445, the flash point can be measured according to ASTM D92, and the pour point can be measured according to ASTM D97.

[0045] According to one embodiment of the present application, the corrosion inhibitor contained in the composition is a salt of an organic sulfonic acid or carboxylic acid, such as calcium salt, sodium salt, potassium salt, magnesium salt, ammonium salt, organic ammonium salt, preferably calcium salt. Examples of the organic sulfonic acid or carboxylic acid include aromatic sulfonic acid, aliphatic sulfonic acid, aromatic carboxylic acid, aliphatic carboxylic acid, such as benzenesulfonic acid, benzenesulfonic acid substituted with 1 - 3 C1 - C12 alkyl groups, naphthalenesulfonic acid, naphthalenesulfonic acid substituted with 1 - 6 alkyl groups, C1 - C16 alkylsulfonic acid, benzoic acid, phthalic acid, benzoic acid substituted with 1 - 3 C1 - C12 alkyl groups, phthalic acid, naphthoic acid, naphthalenedicarboxylic acid, naphthoic acid substituted with 1 - 6 alkyl groups, C1 - C16 alkylcarboxylic acid. According to a preferred embodiment of the present application, the corrosion inhibitor is calcium dinonylnaphthalenesulfonate.

[0046] According to one embodiment of the present application, based on the total weight of the lubricating and anti-corrosion composition, the content of the corrosion inhibitor is greater than 0% by weight and less than or equal to 10% by weight, preferably 3 - 10% by weight.

[0047] According to one embodiment of the present application, the viscosity index improver is selected from at least one of the following: poly(meth)acrylic acid alkyl ester (such as C1 - C12 alkyl ester), poly(meth)acrylic acid alkyl ester (such as C1 - C12 alkyl ester) copolymer, alkylnaphthalene (such as naphthalene containing 1 to 8 C1 - C12 alkyl substituents), dialkyl fumarate (such as C1 - C12 alkyl ester) / vinyl acetate copolymer. According to one embodiment of the present application, the weight average molecular weight of the viscosity index improver is 3000 to 6000000, such as 5000 to 5000000, preferably 10000 to 50000. According to another embodiment of the present application, the viscosity (such as the viscosity at 100 °C) of the viscosity index improver is about 100 - 1200 mm 2 / s, such as 500 - 1000 mm 2 / s, or 700 - 900 mm 2 / s. According to a preferred embodiment of the present application, the viscosity index improver is poly(meth)acrylic acid alkyl ester, with a molecular weight of about 90000 to 110000, such as about 100000, and the viscosity at 100 °C is about 750 - 850 mm 2 / s, such as about 885 mm2 / s.

[0048] According to an embodiment of the present application, based on the total weight of the lubricating and anti-corrosion composition, the content of the viscosity index improver is 0-10% by weight, preferably 1-8% by weight.

[0049] According to an embodiment of the present application, the anti-wear agent is selected from at least one of the following: isopropyl triphenyl phosphate, tert-butyl triphenyl phosphate, ricinoleic acid polycaprolactone, 12-hydroxy stearic acid polycaprolactone, dimer acid ester, trimer acid ester. Ricinoleic acid is an unsaturated straight-chain carboxylic acid containing both a hydroxyl group and a carboxyl group in the molecule. Therefore, ricinoleic acid polycaprolactone represents a homopolymer formed by the esterification reaction of ricinoleic acid molecules with each other through hydroxyl and carboxyl groups, and its degree of polymerization can be 2-1000, for example, it can be 3-500, or 4-100. According to an exemplary embodiment of the present application, examples of the dimer acid ester include isooctyl dimerate, n-octyl dimerate, n-pentyl dimerate; examples of the trimer acid ester include isooctyl trimerate, n-octyl trimerate, n-pentyl trimerate. According to a preferred embodiment of the present application, the anti-wear agent is ricinoleic acid polycaprolactone, and its degree of polymerization is about 4.

[0050] According to an embodiment of the present application, based on the total weight of the lubricating and anti-corrosion composition, the content of the anti-wear agent is 0-1% by weight, preferably 0.1-1% by weight.

[0051] According to an embodiment of the present application, the film-forming agent is selected from at least one of the following: petrolatum, oxidized wax ester, oxidized petrolatum, lanolin, lanolin magnesium soap, lanolin calcium soap, pentaerythritol ester of lanolin fatty acid. Preferably, the film-forming agent is lanolin. Based on the total weight of the lubricating and anti-corrosion composition, the content of the film-forming agent is 0-1% by weight, preferably 0.1-1% by weight.

[0052] The antioxidants used in the present invention can be phenolic antioxidants, amine antioxidants, or a mixture of the two. The phenolic antioxidants can include one or more of the following compounds: 2,6-di-tert-butyl-p-cresol, 4,4'-methylenebis(2,6-di-tert-butylphenol), 3,5-di-tert-butyl-4-hydroxyphenyl propionate, 2,4-dimethyl-6-tert-butylphenol, 2,6-di-tert-butylphenol and tert-butylphenol, methylene 4,4'-thiobis-(2,6-di-tert-butylphenol), etc. The amine antioxidants can include one or more of the following compounds: naphthylamine, diphenylamine, p-phenylenediamine, 2-octyldiphenylamine, 4-tert-butyl-N-phenylaniline, 4,4'-dioctyldiphenylamine, N,N-diphenyl-p-phenylenediamine, m-xylylenediamine, 4-tert-butyldiphenylamine, octylbutyldiphenylamine, N-phenyl-α-naphthylamine, octylated phenyl-α-naphthylamine, etc. According to a preferred embodiment, the antioxidant is one or more of the following: 4,4'-methylenebis(2,6-di-tert-butylphenol), 2,6-di-tert-butyl-p-cresol, tert-butylphenol.

[0053] According to one embodiment of the present application, based on the total weight of the lubricating and anti-corrosion composition, the content of the antioxidant is greater than 0% by weight and less than or equal to 1% by weight, preferably 0.1-1% by weight.

[0054] The metal deactivators of the present application are selected from one or more of the following compounds: benzotriazole, methylbenzotriazole, 1-[(bis(2-ethylhexyl)aminomethyl]-1H-1,2,4-triazole, thiadiazole, a complex of methylbenzotriazole-aldehyde-amine condensate and thiadiazole polysulfide compound, a complex of methylbenzotriazole-aldehyde-amine condensate and thiadiazole polysulfide compound, a complex of benzotriazole-aldehyde-amine condensate and N,N',N''-tris[1-(benzotriazolyl)alkyl]melamine, a complex of methylbenzotriazole-aldehyde-amine condensate and N,N',N''-tris[1-(benzotriazolyl)alkyl]melamine. Preferably, the metal deactivator is 1-[(bis(2-ethylhexyl)aminomethyl]-1H-1,2,4-triazole.

[0055] According to one embodiment of the present application, based on the total weight of the lubricating and anti-corrosion composition, the content of the metal deactivator is greater than 0% by weight and less than or equal to 1% by weight, preferably 0.1-1% by weight.

[0056] The dehydrating agents of the present invention are selected from at least one of the following: propylene glycol monobutyl ether, ethylene glycol monobutyl ether, propylene glycol methyl ether, ethylene glycol methyl ether, propylene glycol ethyl ether, ethylene glycol ethyl ether, polyethylene glycol 400, polyethylene glycol 600, polyethylene glycol 1000, polyethylene glycol 2000. Preferably, the dehydrating agent is selected from one or more of the following: propylene glycol butyl ether, ethylene glycol butyl ether, polyethylene glycol 1000, polyethylene glycol 2000.

[0057] According to an embodiment of the present application, based on the total weight of the lubricating and anti-corrosion composition, the content of the dehydrating agent is 0-2% by weight, preferably 0.1-2% by weight.

[0058] The dispersant used in the present invention is selected from one or more of the following compounds: polyisobutylene succinimide (such as T154), boronated polyisobutylene succinimide (such as T154B).

[0059] According to an embodiment of the present application, based on the total weight of the lubricating and anti-corrosion composition, the content of the dispersant is 0-1% by weight, preferably 0.1-1% by weight.

[0060] The defoaming agent used in the present invention is selected from one or more of the following compounds: silicone oxygen alkane type defoaming agent, polyacrylate type defoaming agent, ether alcohol type defoaming agent; preferably a silicone oxygen alkane type defoaming agent.

[0061] According to an embodiment of the present application, based on the total weight of the lubricating and anti-corrosion composition, the content of the defoaming agent is 0-0.1% by weight, preferably 0.01-0.1% by weight.

[0062] According to an embodiment of the present application, the lubricating and anti-corrosion composition of the present application can be prepared by mixing the above components in a suitable order. In an exemplary embodiment of the present application, one or more of the above components can be added to a mixing device and continuously stirred and mixed. The mixing process can be carried out at a temperature of 0-70°C, such as 45-55°C. The mixing duration can be 3 minutes to 24 hours, such as 1-3 hours. After mixing, a purification operation can be optionally carried out according to needs, whereby the lubricating and anti-corrosion composition of the present application can be obtained.

[0063] According to a preferred embodiment, the lubricating and anti-corrosion composition of the present application is particularly suitable for providing lubrication and anti-corrosion effects for equipment operating under cold conditions. Examples of applicable equipment include fixed-wing aircraft, helicopters, drones, space vehicles, ships, submarines, refrigeration equipment, automobiles, trains, outdoor power equipment, outdoor communication equipment, etc. The lubricating and anti-corrosion composition of the present invention is particularly suitable for the aviation field and is applied to the inner and outer surfaces of various aircraft, as well as the inner and outer parts of various devices, components, and parts of the aircraft, simultaneously providing lubrication and anti-corrosion effects. For example, the lubricating and anti-corrosion composition of the present application can be applied to metal parts through coating techniques such as spraying and brushing to provide long-term anti-corrosion protection and lubrication effects, significantly reducing the corrosion maintenance costs of related equipment. Through precise design of the composition formula of the present application and selection of the types and contents of various components therein, the obtained lubricating and anti-corrosion composition has excellent low-temperature fluidity and excellent water displacement performance, meeting all the index requirements of the MIL-PRF-32033A standard. In addition, compared with existing water displacement-type anti-corrosion agents, the composition of the present invention also has a high flash point and good lubrication performance, can be applied to the anti-corrosion of moving parts, and can reduce friction, operating noise, and vibration of moving parts.

[0064] In the following examples, the excellent effects that can be achieved by the method of the present application are specifically described. The purpose is to better understand the content of the present application. It should be understood that these examples are merely illustrative and not restrictive. The reagents used in the examples are all conventionally purchased from the market unless otherwise specified. The methods and conditions used in the examples are conventional methods and conditions unless otherwise specified.

[0065] Embodiment

[0066] The base oil XZ-Base used in the following examples was purchased from Xuzhen Energy Technology Co., Ltd., SpectraSyn2, SpectraSyn 2C, SpectraSyn 4, Esterex A32, and Esterex A34 were purchased from ExxonMobil Corporation, SDZ-3 and SDZ-4 were purchased from Nanjing Weier Pharmaceutical Group Co., Ltd., and NPE-1 and NPE-2 were purchased from Shandong Ruijie New Materials Co., Ltd.;

[0067] The parameters of these base oils are summarized in Table 1 below:

[0068] Table 1: Kinematic viscosity at 40°C, flash point, and pour point of various base oils used in the examples

[0069]

[0070]

[0071] The polymethacrylate viscosity index improver is from Evonik Specialty Chemicals (with a molecular weight of about 100,000 and a viscosity of about 885 mm 2 / s at 1000), the calcium dinonylnaphthalene sulfonate corrosion inhibitor is purchased from King Chemical Company, the antioxidants 4,4'-methylenebis(2,6-di-tert-butylphenol), 2,6-di-tert-butyl-p-cresol and tert-butylphenol are purchased from Cennir Company, the metal deactivator 1-[bis(2-ethylhexyl)aminomethyl]-1H-1,2,4-triazole is purchased from BASF Company, the dehydrating agents propylene glycol monobutyl ether, ethylene glycol monobutyl ether, polyethylene glycol 1000, polyethylene glycol 2000 are all purchased from Shanghai Titan Scientific Co., Ltd., the dispersant polyisobutylene succinimide T154 is purchased from Jinan Quanxing New Materials Co., Ltd., and the defoamers FoamBan 130B, FoamBan 149, FoamBan 152 are purchased from Mengqingxin Additive Trading (Shanghai) Co., Ltd. The antiwear agent is a castor oil acid polyolide with a polymer of about 4, and both the antiwear agent and the film-forming agent are commercially available products.

[0072] Example 1

[0073] In this example, a lubricating and anticorrosive composition was prepared by the following steps: Weigh 236.9 grams of SpectraSyn 4 base oil, 599 grams of XZ-Base base oil, 30 grams of polymethacrylate viscosity index improver, 100 grams of calcium dinonylnaphthalene sulfonate corrosion inhibitor, 1 gram of castor oil acid polyolide antiwear agent, 10 grams of lanolin film-forming agent, 5 grams of 4,4'-methylenebis(2,6-di-tert-butylphenol) antioxidant, 3 grams of 1-[bis(2-ethylhexyl)aminomethyl]-1H-1,2,4-triazole metal deactivator, 10 grams of propylene glycol monobutyl ether dehydrating agent, 5 grams of T154 polyisobutylene succinimide dispersant and 0.1 gram of FoamBan 130B defoamer, add them to a stainless steel mixer with a temperature control device and a stirring device, heat to 50 °C, and continuously stir at this temperature for 2 hours, then stop stirring and cool down to room temperature to obtain the lubricating and anticorrosive composition. As Figure 1 shown, the lubricating and anticorrosive composition is a transparent light yellow liquid.

[0074] Example 2

[0075] In this embodiment, a lubricating and anti-corrosion composition was prepared through the following steps: Weigh 423.5 grams of SpectraSyn 2 base oil, 400 grams of SpectraSyn 4 base oil, 80 grams of polymethacrylic acid alkyl ester viscosity index improver, 50 grams of calcium dinonylnaphthalene sulfonate corrosion inhibitor, 5 grams of castor oil acid polycaprolactone anti-wear agent, 5 grams of lanolin film-forming agent, 10 grams of 2,6-di-tert-butyl-p-cresol antioxidant, 5 grams of 1-[bis(2-ethylhexyl)aminomethyl]-1H-1,2,4-triazole metal deactivator, 20 grams of ethylene glycol monobutyl ether dehydrating agent, 1 gram of T154 polyisobutylene succinimide dispersant, and 0.5 grams of FoamBan 149 defoamer. Add them to a stainless steel mixer equipped with a temperature control device and a stirring device, heat to 50 °C, and continuously stir at this temperature for 2 hours. Then stop stirring and cool down to room temperature to obtain the lubricating and anti-corrosion composition.

[0076] Example 3

[0077] In this embodiment, a lubricating and anti-corrosion composition was prepared through the following steps: Weigh 200 grams of SpectraSyn 4 base oil, 686.5 grams of XZ-Base base oil, 34 grams of polymethacrylic acid alkyl ester viscosity index improver, 40 grams of calcium dinonylnaphthalene sulfonate corrosion inhibitor, 9 grams of castor oil acid polycaprolactone anti-wear agent, 4 grams of lanolin film-forming agent, 10 grams of 2,6-di-tert-butyl-p-cresol antioxidant, 10 grams of 1-[bis(2-ethylhexyl)aminomethyl]-1H-1,2,4-triazole metal deactivator, 5 grams of polyethylene glycol 2000 dehydrating agent, 10 grams of T154 polyisobutylene succinimide dispersant, and 0.5 grams of FoamBan 152 defoamer. Add them to a stainless steel mixer equipped with a temperature control device and a stirring device, heat to 50 °C, and continuously stir at this temperature for 2 hours. Then stop stirring and cool down to room temperature to obtain the lubricating and anti-corrosion composition.

[0078] Example 4

[0079] In this embodiment, a lubricating and anti-corrosion composition was prepared through the following steps: Weigh 219 grams of SpectraSyn 4 base oil, 605 grams of XZ-Base base oil, 50 grams of polymethacrylic acid alkyl ester viscosity index improver, 75 grams of calcium dinonylnaphthalene sulfonate corrosion inhibitor, 10 grams of castor oil acid polycaprolactone anti-wear agent, 10 grams of lanolin film-forming agent, 5 grams of tert-butylphenol antioxidant, 10 grams of 1-[bis(2-ethylhexyl)aminomethyl]-1H-1,2,4-triazole metal deactivator, 5 grams of polyethylene glycol 1000 dehydrating agent, 10 grams of T154 polyisobutylene succinimide dispersant, 1 gram of FoamBan 130B defoamer. Add them to a stainless steel mixer equipped with a temperature control device and a stirring device, heat to 50 °C, and continuously stir at this temperature for 2 hours. Then stop stirring and cool down to room temperature to obtain the lubricating and anti-corrosion composition.

[0080] Example 5

[0081] In this example, a lubricating and anti-corrosion composition was prepared through the following steps: Weigh 452.6 grams of SpectraSyn2C base oil, 488 grams of SpectraSyn 4 base oil, 10 grams of polymethacrylate viscosity index improver, 34 grams of calcium dinonylnaphthalene sulfonate corrosion inhibitor, 1 gram of castor oil acid polycaprolactone anti-wear agent, 1 gram of lanolin film-forming agent, 1 gram of 2,6-di-tert-butyl-p-cresol antioxidant, 3 grams of 1-[bis(2-ethylhexyl)aminomethyl]-1H-1,2,4-triazole metal deactivator, 1 gram of ethylene glycol monobutyl ether dehydrating agent, 1 gram of polyethylene glycol 2000 dehydrating agent, 7 grams of T154 polyisobutylene succinimide dispersant, and 0.4 gram of FoamBan130B defoamer. Add them to a stainless steel mixer equipped with a temperature control device and a stirring device, heat to 50°C, and continuously stir at this temperature for 2 hours. Then stop stirring and cool down to room temperature to obtain the lubricating and anti-corrosion composition.

[0082] Example 6

[0083] In this example, a lubricating and anti-corrosion composition was prepared through the following steps: Weigh 438.3 grams of Esterex A32 base oil, 488 grams of Esterex A34 base oil, 10 grams of polymethacrylate viscosity index improver, 34 grams of calcium dinonylnaphthalene sulfonate corrosion inhibitor, 2 grams of castor oil acid polycaprolactone anti-wear agent, 1 gram of lanolin film-forming agent, 5 grams of 2,6-di-tert-butyl-p-cresol antioxidant, 3 grams of 1-[bis(2-ethylhexyl)aminomethyl]-1H-1,2,4-triazole metal deactivator, 10 ethylene glycol monobutyl ether dehydrating agents, 5 grams of polyethylene glycol 2000 dehydrating agent, 3 grams of T154 polyisobutylene succinimide dispersant, and 0.7 gram of FoamBan 130B defoamer. Add them to a stainless steel mixer equipped with a temperature control device and a stirring device, heat to 50°C, and continuously stir at this temperature for 2 hours. Then stop stirring and cool down to room temperature to obtain the lubricating and anti-corrosion composition.

[0084] Example 7

[0085] In this embodiment, a lubricating and anti-corrosion composition was prepared through the following steps: Weigh 423.6 grams of SDZ-3 base oil, 468 grams of SDZ 4 base oil, 20 grams of polymethacrylic acid alkyl ester viscosity index improver, 54 grams of calcium dinonylnaphthalene sulfonate corrosion inhibitor, 81 grams of castor oil acid polycaprolactone anti-wear agent, 1 gram of lanolin film-forming agent, 7 grams of 2,6-di-tert-butyl-p-cresol antioxidant, 3 grams of 1-[bis(2-ethylhexyl)aminomethyl]-1H-1,2,4-triazole metal deactivator, 5 grams of ethylene glycol monobutyl ether dehydrating agent, 3 grams of polyethylene glycol 2000 dehydrating agent, 7 grams of T154 polyisobutylene succinimide dispersant, and 0.4 grams of FoamBan 152 defoamer. Add them to a stainless steel mixer equipped with a temperature control device and a stirring device, heat to 50°C, and continuously stir at this temperature for 2 hours. Then stop stirring and cool down to room temperature to obtain the lubricating and anti-corrosion composition.

[0086] Example 8

[0087] In this embodiment, a lubricating and anti-corrosion composition was prepared through the following steps: Weigh 407.2 grams of NPE-1 base oil, 488 grams of NPE-2 base oil, 40 grams of polymethacrylic acid alkyl ester viscosity index improver, 34 grams of calcium dinonylnaphthalene sulfonate corrosion inhibitor, 7 grams of castor oil acid polycaprolactone anti-wear agent, 1 gram of lanolin film-forming agent, 9 grams of 2,6-di-tert-butyl-p-cresol antioxidant, 1 gram of 1-[bis(2-ethylhexyl)aminomethyl]-1H-1,2,4-triazole metal deactivator, 5 grams of ethylene glycol monobutyl ether dehydrating agent, 2 grams of polyethylene glycol 2000 dehydrating agent, 5 grams of T154 polyisobutylene succinimide dispersant, and 0.8 grams of FoamBan 149 defoamer. Add them to a stainless steel mixer equipped with a temperature control device and a stirring device, heat to 50°C, and continuously stir at this temperature for 2 hours. Then stop stirring and cool down to room temperature to obtain the lubricating and anti-corrosion composition.

[0088] Comparative Example 1

[0089] This Comparative Example 1 used ROYCO 308ca purchased from Lanxess, which is a low-temperature water-displacing lubricating and anti-corrosion agent and is alleged to comply with the relevant standards of MIL-PRF-32033.

[0090] Comparative Example 2

[0091] This Comparative Example 2 used WD40 purchased from Wudi (Shanghai) Industrial Co., Ltd., which is a soft film-shaped anti-corrosion agent.

[0092] Comparative Example 3

[0093] This Comparative Example repeated the steps of Example 1, with the only difference being that the SpectraSyn 2 base oil and SpectraSyn 4 base oil used in Example 1 were replaced with commercially available D120 solvent oil.

[0094] Test Examples

[0095] In this test example, performance tests were carried out on the compositions prepared in Examples 1-8 and the compositions of Comparative Examples 1-3, and the test methods are as described below.

[0096] The kinematic viscosity was tested by the ASTM D445 method;

[0097] The damp heat test was tested by the ASTM D1748 method;

[0098] The water displacement test was tested by the SH / T 0036 method;

[0099] The wear scar diameter was tested by the ASTM D4172 method, and the test conditions were as follows: temperature: 75 ± 2 °C; rotational speed: 1200 ± 60 rpm; test duration: 60 ± 1 min; load 392 ± 2 N;

[0100] Copper corrosion was tested by the ASTM D130 method;

[0101] The corrosion test was tested by the ASTM D4636 method;

[0102] The flash point was tested by the ASTM D92 method;

[0103] The pour point was tested by the ASTM D97 method;

[0104] The evaporation loss was tested by the ASTM D972 method;

[0105] The low temperature stability was tested by the SH / T 0644 method.

[0106] Figure 2 Pictures showing the wear scar diameter test using the lubricating and anti-corrosion composition prepared in Example 1 are shown.

[0107] The test performance characterization results are shown in Table 2

[0108] Table 2: Performance of the lubricating and anti-corrosion agents of Examples 1-8 and Comparative Examples 1-3

[0109]

[0110] As can be seen from the above results, the low-temperature water-displacement lubricating preservative composition prepared in the embodiments of the present invention can achieve the following excellent properties: It has excellent low-temperature fluidity; it has a higher flash point compared to the water-displacement preservative of the comparative example, better use safety, more excellent high-temperature oxidation and corrosion resistance, and at the same time has good lubricating and anti-wear properties. It can be used for moving parts with certain lubrication requirements. While achieving the rust prevention performance, no additional lubricant needs to be added. It meets the requirements of MIL-PRF-32033 and can be well applied to, for example, aviation applications.

Claims

1. A lubricating and anti-corrosion composition, based on the total weight of the composition, the composition comprises: 73 - 95% by weight of a base oil; Greater than 0% and less than or equal to 10% by weight of a corrosion inhibitor; 0 - 10% by weight of a viscosity index improver; 0 - 1% by weight of an anti-wear agent; 0 - 1% by weight of a film-forming agent; Greater than 0% and less than or equal to 1% by weight of an antioxidant; Greater than 0% and less than or equal to 1% by weight of a metal deactivator; 0 - 2% by weight of a dehydrating agent; 0 - 1% by weight of a dispersant; 0 - 0.1% by weight of an antifoaming agent.

2. The lubricating and anticorrosive composition according to claim 1, wherein Based on the total weight of the composition, the composition comprises 80 - 95% by weight of a base oil; and / or The base oil is selected from at least one of the following: mineral base oil, naphthenic base oil, polyalphaolefin base oil, synthetic ester base oil; and / or The kinematic viscosity of the base oil at 40 °C is 1-25 mm 2 / s, the flash point is equal to or higher than 120 °C, and the pour point is equal to or lower than -40 °C.

3. The lubricating and anti-corrosion composition according to claim 1, wherein The composition comprises 3 - 10% by weight of the corrosion inhibitor; The corrosion inhibitor is selected from at least one of the following: calcium aromatic sulfonate, calcium aliphatic sulfonate, calcium aromatic carboxylate, calcium aliphatic carboxylate.

4. The lubricating and anti-corrosion composition according to claim 1, wherein The composition contains 1 - 8% by weight of the viscosity index modifier; The viscosity index improver is selected from at least one of the following: poly(alkyl) methacrylate, poly(alkyl) methacrylate copolymer, alkyl naphthalene, dialkyl fumarate / vinyl acetate copolymer.

5. The lubricating and anti-corrosion composition according to claim 1, wherein The composition comprises 0.1 - 1% by weight of the anti-wear agent; The anti-wear agent is selected from at least one of the following: isopropyltriphenyl phosphate, tert-butyltriphenyl phosphate, castor oil acid polycaprolactone, 12-hydroxystearic acid polycaprolactone, dimer acid ester, trimer acid ester.

6. The lubricating and anti-corrosion composition according to claim 1, wherein The composition comprises 0.1 - 1% by weight of the film-forming agent; The film-forming agent is selected from at least one of the following: petrolatum, oxidized wax ester, oxidized petroleum jelly, lanolin, lanolin magnesium soap, lanolin calcium soap, lanolin fatty acid pentaerythritol ester.

7. The lubricating and anti-corrosion composition according to claim 1, wherein The composition comprises 0.1 - 1% by weight of the antioxidant; The antioxidant is a phenolic antioxidant, an amine antioxidant or a combination thereof; The phenolic antioxidant is selected from one or more of the following: 2,6-di-tert-butyl-p-cresol, 4,4'-methylenebis(2,6-di-tert-butylphenol), 3,5-di-tert-butyl-4-hydroxyphenyl propionate, 2,4-dimethyl-6-tert-butylphenol, 2,6-di-tert-butylphenol and tert-butylphenol; The amine antioxidant is selected from one or more of the following: naphthylamine, diphenylamine, p-phenylenediamine, 2-octyldiphenylamine, 4-tert-butyl-N-phenylaniline, 4,4'-dioctyldiphenylamine, N,N-diphenyl-p-phenylenediamine, m-xylenediamine, 4-tert-butyldiphenylamine, octylbutyldiphenylamine, N-phenyl-α-naphthylamine, octylated phenyl-α-naphthylamine.

8. The lubricating and anti-corrosion composition according to claim 1, wherein the composition contains 0.1-1% by weight of the metal deactivator; the metal deactivator is selected from at least one of the following: benzotriazole, methylbenzotriazole, 1-[(bis(2-ethylhexyl)amino)methyl]-1H-1,2,4-triazole, thiadiazole, a complex of methylbenzotriazole-aldehyde-amine condensate and thiadiazole polysulfide compound, a complex of methylbenzotriazole-aldehyde-amine condensate and thiadiazole polysulfide compound, a complex of benzotriazole-aldehyde-amine condensate and N,N’,N”-tris[1-(benzotriazolyl)alkyl]melamine, a complex of methylbenzotriazole-aldehyde-amine condensate and N,N’,N”-tris[1-(benzotriazolyl)alkyl]melamine.

9. The lubricating and anti-corrosion composition according to claim 1, wherein the composition contains 0.1-2% by weight of the dehydrating agent; the dehydrating agent is selected from at least one of the following: propylene glycol monobutyl ether, ethylene glycol monobutyl ether, propylene glycol methyl ether, ethylene glycol methyl ether, propylene glycol ethyl ether, ethylene glycol ethyl ether, polyethylene glycol 400, polyethylene glycol 600, polyethylene glycol 1000, polyethylene glycol 2000; the composition contains 0.1-1% by weight of the dispersant; the dispersant is selected from at least one of the following: polyisobutylene succinimide, borated polyisobutylene succinimide; the composition contains 0.01-0.1% by weight of the defoaming agent; the defoaming agent is selected from at least one of the following: silicone oxygen-containing defoaming agent, polyacrylate defoaming agent, ether alcohol defoaming agent.

10. A method for lubricating and anti-corrosion treatment of equipment, the method comprising applying the lubricating and anti-corrosion composition according to any one of claims 1-9 to at least a part of the parts or components of the equipment; the equipment is selected from: fixed-wing aircraft, helicopters, unmanned aerial vehicles, space vehicles, ships, submarines, refrigeration equipment, automobiles, trains, outdoor power equipment, outdoor communication equipment.

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