Corrosion inhibition type bearing cleaning agent

Abstract

The invention provides a corrosion inhibition type bearing cleaning agent, a preparation method thereof and application of the corrosion inhibition type bearing cleaning agent in bearing cleaning of railway vehicles and metro vehicles. According to the cleaning agent, the orange peel extract and / or the orange peel extract carbon quantum dots are / is adopted as a corrosion inhibitor, so that the cleaning performance and the corrosion inhibition performance are improved, and meanwhile, the green and environment-friendly performance is also considered.

Description

TECHNICAL FIELD

[0001] The present application relates to a cleaning agent, in particular to an anti-corrosion bearing cleaning agent for railway vehicles and subway vehicles. BACKGROUND

[0002] Railway vehicles and subway vehicles are an important part of modern urban public transportation, and their safety and reliability are directly related to the safety of the lives and property of the general public and the smooth operation of the urban transportation system. In these vehicles, bearings, as key components, not only bear the weight of the vehicle, but also are responsible for transmitting power and rotational motion, and their performance status has a crucial impact on the overall operational efficiency and service life of the vehicle. However, during long-term use, bearings often have stubborn dirt accumulated on their surfaces, such as lubricating grease residues, metal wear particles, rust, dust, etc., which not only reduces the running efficiency of the bearings and increases energy consumption, but also can cause premature damage to the bearings and trigger safety accidents. Therefore, regular cleaning and maintenance of bearings, especially the use of high-efficiency anti-corrosion cleaning agents, have become one of the key measures to ensure the safe and efficient operation of railway vehicles and subway vehicles.

[0003] However, the current bearing cleaning technology on the market has the following obvious problems:

[0004] 1. Cleaning effect: 1.1) Incomplete cleaning: The viscosity of the grease dirt in the bearing components is high, the internal cohesion is large, and the adhesion to solid particles and the surface of the object is strong, making cleaning difficult. Therefore, conventional cleaning agents cannot completely remove the grease dirt and impurities inside the bearings, resulting in poor cleaning effect; 1.2) Poor adaptability to complex structures: The structure of bearing components is complex, and conventional cleaning agents are difficult to penetrate into all corners and gaps, resulting in uneven cleaning. The mechanism and basic theory of methods such as jet cleaning have not been thoroughly researched, so the design of cleaning devices and cleaning process parameters is only based on experience, affecting the cleaning quality.

[0005] 2. Environmental friendliness: 2.1) Volatile organic compound (VOC) emissions: Some current cleaning agents contain volatile organic compounds, which can volatilize into the air during use, causing environmental pollution; long-term or large-scale use of these cleaning agents may result in VOC emissions exceeding standards, affecting air quality; 2.2) Poor biodegradability: Some cleaning agents are difficult to biodegrade and may remain in the environment after use, causing long-term impact on the ecosystem.

[0006] 3. Safety: 3.1) Irritation: Some existing cleaning agents contain chemical ingredients that can cause irritation to the respiratory tract, skin, and eyes. Exposure to these chemical ingredients can result in symptoms such as coughing, sore throat, difficulty breathing, skin redness, itching, pain, rash, and eye redness, pain, burning, and blurred vision; 3.2) Flammable and explosive: Some existing cleaning agents are flammable and explosive, and special safety precautions must be taken during use. Improper storage or use of these cleaning agents can lead to fire or explosion accidents.

[0007] 4. Economy: 4.1) High cost: Some high-efficiency cleaning agents are expensive, increasing the operating costs of the railway department; especially the railway department has a large demand for bearing cleaning agents, and the cost problem is particularly prominent; 4.2) Low reuse rate: Some cleaning agents are difficult to recycle and reuse after use, resulting in waste of resources.

[0008] To address the above-mentioned deficiencies, Chinese patent application CN114456885A discloses a bearing part cleaning agent and a preparation method thereof, and specifically discloses that the bearing part cleaning agent comprises the following components: deionized water, FTP2210 cleaning agent, and FTP2061 rust inhibitor. Further, the patent application discloses that the bearing part cleaning agent of the present application can effectively improve the cleaning degree of bearing parts and achieve a rust prevention period basically the same as kerosene; the bearing part cleaning agent can avoid fire accidents; the bearing part cleaning agent is non-toxic, non-polluting, and non-allergic, has weak odor, and has no obvious odor during use, greatly improving the air quality in the workshop; and the problems of obvious fire safety hazards and air quality decline caused by kerosene cleaning are solved. However, as can be seen from the cleaning agent formula provided in the patent application, it has the defects of poor biodegradability and long degradation period.

[0009] Therefore, there is still a need for a special cleaning agent developed for the special needs of railway vehicle and subway vehicle bearings. This cleaning agent not only needs to have strong oil removal, degreasing, and stain removal capabilities, and can quickly and thoroughly remove stubborn dirt on bearings, but also should have excellent corrosion inhibition, so that it can effectively protect the metal surface of the bearing during and after cleaning, prevent corrosion and oxidation, and prolong the service life of the bearing. SUMMARY

[0010] Based on research and analysis of domestic and international literature, the inventors of this application, starting with the optimization and selection of raw materials, and through research and analysis of the mechanism of plant-based corrosion inhibitors, combined with different types of main solvents, prepared the corrosion-inhibiting bearing cleaning agent of this invention. The cleaning agent of this invention uses orange peel extract and / or orange peel extract carbon quantum dots as corrosion inhibitors, with low VOC content, increasing cleaning performance while also being environmentally friendly. Simultaneously, the orange peel extract and / or orange peel extract carbon quantum dots are fully adsorbed onto the surface of the metal steel through physical adsorption (with a small amount of chemical adsorption also present), playing a long-lasting role in corrosion inhibition.

[0011] Therefore, one objective of the present invention is to provide a corrosion-inhibiting bearing cleaner.

[0012] Another objective of the present invention is to provide a method for preparing the above-mentioned corrosion-inhibiting bearing cleaning agent.

[0013] Another objective of this invention is to provide the use of the above-mentioned corrosion-inhibiting bearing cleaner in the cleaning of bearings of railway vehicles and subway vehicles.

[0014] Another objective of this invention is to provide a method for preparing carbon quantum dots from orange peel extract.

[0015] To achieve the above-mentioned objectives of the present invention, the present invention adopts the following technical solution.

[0016] On one hand, the present invention provides a corrosion-inhibiting bearing cleaning agent, wherein, by total weight (100%), the cleaning agent comprises the following components: orange peel extract 0-2%, orange peel extract carbon quantum dots 0-2%, BTA 0.01-0.7%, thiourea 0.01-0.8%, triethanolamine 2-10%, sebacic acid 2-6%, polydimethylsiloxane 0.01-2.2%, AEO (fatty alcohol polyoxyethylene ether) 0.5-10%, and isooctanol phosphate (C8H2O) 19 O4P) 10-25%, water balance;

[0017] The orange peel extract and the orange peel extract carbon quantum dots are not both zero.

[0018] Preferably, the cleaning agent comprises the following components, based on a total weight of 100%:

[0019] Orange peel extract 0 - 1.2 %, orange peel extract carbon quantum dots 0.5 - 2 %, BTA 0.01 - 0.4 %, thiourea 0.01 - 0.1 %, triethanolamine 2 - 4.5 %, sebacic acid 3 - 6 %, dimethicone 0.1 - 2.2 %, AEO (fatty alcohol polyoxyethylene ether) 0.5 - 5 %, isooctanol phosphate (C8H 19 O4P) 15 - 25 %, water remainder.

[0020] Further preferably, wherein the cleaning agent comprises the following components, based on 100 % of the total weight:

[0021] Orange peel extract carbon quantum dots 0.5 - 2 %, BTA 0.01 - 0.4 %, thiourea 0.01 - 0.1 %, triethanolamine 2 - 4.5 %, sebacic acid 3 - 6 %, dimethicone 0.1 - 2.2 %, AEO (fatty alcohol polyoxyethylene ether) 0.5 - 5 %, isooctanol phosphate (C8H 19 O4P) 15 - 25 %, water remainder.

[0022] Still further preferably, wherein the cleaning agent comprises the following components, based on 100 % of the total weight:

[0023] Orange peel extract carbon quantum dots 1.2 %, BTA 0.4 %, thiourea 0.1 %, triethanolamine 4.5 %, sebacic acid 3 %, dimethicone 2.2 %, AEO (fatty alcohol polyoxyethylene ether) 5 %, isooctanol phosphate (C8H 19 O4P) 17 %, water remainder.

[0024] Yet further preferably, wherein the cleaning agent comprises the following components, based on 100 % of the total weight:

[0025] Orange peel extract 1.2 %, BTA 0.4 %, thiourea 0.1 %, triethanolamine 4.5 %, sebacic acid 3 %, dimethicone 2.2 %, AEO (fatty alcohol polyoxyethylene ether) 5 %, isooctanol phosphate (C8H 19 O4P) 17 %, water remainder.

[0026] In some specific embodiments, wherein the cleaning agent comprises the following components, based on 100 % of the total weight:

[0027] (a) Orange peel extract carbon quantum dots 2%, BTA 0.01%, thiourea 0.01%, triethanolamine 2%, sebacic acid 6%, dimethicone 0.1%, AEO-7 (fatty alcohol polyoxyethylene ether) 0.5%, isooctanol phosphate (C8H 19 O4P) 25%, water balance; or

[0028] (b) Orange peel extract carbon quantum dots 0.8%, BTA 0.7%, thiourea 0.8%, triethanolamine 10%, sebacic acid 2%, dimethicone 0.01%, AEO-7 (fatty alcohol polyoxyethylene ether) 10%, isooctanol phosphate (C8H 19 O4P) 10%, water balance; or

[0029] (c) Orange peel extract carbon quantum dots 0.5%, BTA 0.2%, thiourea 0.01%, triethanolamine 3%, sebacic acid 3%, dimethicone 1.5%, AEO-7 (fatty alcohol polyoxyethylene ether) 1%, isooctanol phosphate (C8H 19 O4P) 15%, water balance; or

[0030] (d) Orange peel extract carbon quantum dots 1.2%, BTA 0.4%, thiourea 0.01%, triethanolamine 4.5%, sebacic acid 3%, dimethicone 2.2%, AEO-7 (fatty alcohol polyoxyethylene ether) 5%, isooctanol phosphate (C8H 19 O4P) 17%, water balance.

[0031] In the cleaning agent provided by the present application, the orange peel extract used is prepared by drying, grinding, extracting with a mixed solution of ethanol and acetone, filtering and drying the orange peel. Preferably, the orange peel extract is navel orange peel extract, such as Gannan navel orange peel extract. More preferably, the orange peel extract is prepared by the following method: grinding the dried navel orange peel to obtain orange peel powder, adding anhydrous ethanol and acetone, soaking in a water bath at 65°C for 3h, filtering and drying the filtrate in a forced air drying oven to obtain the orange peel extract. Further preferably, the mass ratio of the orange peel powder to anhydrous ethanol and acetone is 1:10:10. In a specific embodiment of the present application, 2000g of dried navel orange peel is ground to obtain about 40g of orange peel powder, then anhydrous ethanol 400g and acetone 400g (mass ratio of 1:10:10) are added to the orange peel powder, soaked in a water bath at 65°C for 3h, filtered and the filtrate is dried in a forced air drying oven to obtain about 3.2g of orange peel extract (powdered).

[0032] In the cleaning agent provided by the present application, the orange peel extract carbon quantum dots are obtained by dissolving orange peel powder in a mixed solution of water, CH3COOH and NaOH, oscillating and then standing, and filtering. In some embodiments of the present application, the orange peel powder is prepared by grinding naturally air-dried orange peel. In further embodiments, the orange peel extract carbon quantum dots are navel orange peel extract carbon quantum dots, such as Gannan navel orange peel extract carbon quantum dots. In some embodiments of the present application, in the mixed solution of water, CH3COOH and NaOH, the mass ratio of water: CH3COOH: NaOH is 20:0.2:0.03. In other embodiments of the present application, the mixed solution of water, CH3COOH and NaOH is a mixed solution of water, 10% CH3COOH solution and 0.05 mol / L NaOH solution in a volume ratio of 20:2:1.5. In some embodiments of the present application, the oscillation is performed by using an ultrasonic cleaner, and the oscillation time is 20-40 min, preferably 20-30 min. In some embodiments of the present application, the standing is standing for 1-3 hours, preferably 2 hours. In some embodiments of the present application, the filtering is performed by using filter paper, more specifically, filter paper with a diameter of 12.5 cm purchased from Hangzhou Fuyang Beimuzhuang Paper Co., Ltd.

[0033] In specific embodiments of the present application, the orange peel extract carbon quantum dots are prepared by the following method: 2000 grams of navel orange peel is naturally air-dried and then ground to obtain about 40 grams of orange peel powder. 20 mL of deionized water, 1%, 10% or 20% CH3COOH solution (corresponding to a volume of 0.2 mL, 2 mL and 4 mL) and 0.1 mol / L, 0.5 mol / L or 1.0 mol / L NaOH solution (corresponding to a volume of 0.5 mL, 1.5 mL and 3 mL) are respectively poured into test tubes, and then 0.5 g of orange peel powder is poured into the test tubes. The test tubes are sealed and oscillated by using an ultrasonic cleaner for 1-60 minutes, taken out and stood for 2 hours. The solution in the test tubes is filtered into a beaker by using filter paper to obtain orange peel extract carbon quantum dots.

[0034] In the cleaning agent provided by the present application, the fatty alcohol polyoxyethylene ether used is AEO-7 and / or AEO-9, more preferably AEO-7.

[0035] In another aspect, the present application provides a preparation method of the above-mentioned corrosion-inhibiting bearing cleaning agent, which comprises the following steps:

[0036] S1: mixing a formula amount of triethanolamine with an appropriate amount of water, then adding BTA, uniformly mixing, and then adding orange peel extract and / or orange peel extract carbon quantum dots to obtain component A;

[0037] S2: sebacic acid, thiourea, fatty alcohol polyoxyethylene ether are sequentially added into appropriate amount of water, mixed uniformly to obtain component B;

[0038] S3: the remaining water, component A obtained in S1, component B obtained in S2, dimethicone, isooctanol phosphate (C8H 19 O4P) are mixed uniformly to obtain the cleaning agent.

[0039] In the above steps S1 and S2, the appropriate amount of water is not particularly limited, as long as it is sufficient to dissolve the corresponding substances.

[0040] In another aspect, the application provides the use of the above-mentioned corrosion-inhibiting bearing cleaning agent in bearing cleaning.

[0041] Preferably, the bearing is preferably a bearing of a railway vehicle and a subway vehicle.

[0042] In another aspect, the application provides a preparation method of orange peel extract carbon quantum dots, wherein the method comprises the following steps: dissolving orange peel powder in a mixed solution of water, CH3COOH and NaOH, oscillating and then standing, and filtering to obtain.

[0043] Preferably, the orange peel powder is prepared by grinding naturally air-dried orange peel. Further preferably, in the mixed solution of water, CH3COOH and NaOH, the mass ratio of water, CH3COOH and NaOH is 20:0.2:0.03. More preferably, the mixed solution of water, CH3COOH and NaOH is a mixed solution of water, 10% CH3COOH solution and 0.05 mol / L NaOH solution with a volume ratio of 20:2:1.5.

[0044] Preferably, the oscillation is performed by using an ultrasonic cleaner, and the oscillation time is 20-40 min, preferably 20-30 min. Preferably, the standing is for 1-3 hours, preferably 2 hours. Preferably, the filtering is performed by using filter paper, and more preferably, the filtering is performed by using filter paper with a diameter of 12.5 cm.

[0045] Compared with the prior art, the advantages of the cleaning agent of the application mainly lie in the following aspects:

[0046] 1. Cleaning effect: the cleaning agent of the application has strong cleaning power on bearing oil stains, can effectively remove stubborn dirt on the bearing under high pressure process conditions in a short time, thereby ensuring the cleanliness of the bearing. Compared with the traditional cleaning agent, the cleaning agent of the application has higher cleaning efficiency.

[0047] 2. Green and Environmentally Friendly: The cleaning agent of this invention uses an environmentally friendly formula, reducing pollution to the environment. The cleaning agent is recyclable; when the concentration decreases, the concentrate can be added back for continued use without dumping, achieving zero discharge of cleaning wastewater. This significantly reduces wastewater discharge and treatment costs. The cleaning agent of this invention has excellent biodegradability and is environmentally friendly.

[0048] 3. Safety: The cleaning agent of this invention is non-flammable, improving safety during use. It also achieves low VOC emissions, reducing the content of heavy metals and other harmful substances, thus lowering health risks to operators.

[0049] 4. Economic Efficiency: The cleaning agent of this invention has high cleaning efficiency, reducing cleaning time and labor costs. The cleaning agent of this invention has excellent rust prevention effects, potentially extending the maintenance cycle of bearings and reducing replacement and repair costs. The cleaning agent of this invention has a long service life and is reusable, further reducing usage costs.

[0050] 5. Rust prevention effect: The cleaning agent of this invention uses orange peel extract as a corrosion inhibitor component for the first time, and also prepares orange peel extract carbon quantum dots. Both have excellent corrosion inhibition effects. Among them, orange peel extract carbon quantum dots are better in terms of inhibiting metal corrosion. Attached Figure Description

[0051] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings, wherein:

[0052] Figure 1 A photograph is shown of the bearing components before cleaning with the cleaning agent of the present invention;

[0053] Figure 2 A photograph is shown of the bearing components after high-pressure cleaning for 20 minutes using the cleaning agent of the present invention. Detailed Implementation

[0054] The present invention will be further described in detail below with reference to specific embodiments. The embodiments given are only for illustrating the present invention and are not intended to limit the scope of the present invention.

[0055] In the following embodiments, the source and / or model information of the raw materials and instruments used is as follows:

[0056] The orange peels are from Gannan navel oranges purchased from the fruit and vegetable market;

[0057] The orange peel extract and the orange peel extract carbon quantum dots were prepared by the inventors according to the method described in this application;

[0058] The walnut green husk carbon quantum dots were prepared according to the method described in Example 1 of patent application CN2024109981209-“A walnut green husk carbon quantum dots and a track fastener cleaning agent”;

[0059] BTA (benzotriazole): Shanghai Maclean Biochemical Technology Co., Ltd.;

[0060] AEO-7: Beijing Qianmen Chemical Co., Ltd.;

[0061] AEO-9: Beijing Qianmen Chemical Co., Ltd.;

[0062] Ethanol, acetone, CH3COOH, NaOH: Shanghai Maclean Biochemical Technology Co., Ltd.

[0063] Oven: Shanghai Yiheng Scientific Instruments Co., Ltd.;

[0064] Filter paper: Hangzhou Fuyang Beimu Pulp & Paper Co., Ltd., diameter 12.5cm;

[0065] Ultrasonic Cleaner: Kunshan Shumei Ultrasonic Cleaner.

[0066] Example 1 Preparation of orange peel extract

[0067] 2000g of navel orange peel was air-dried and then ground into powder to obtain approximately 40g of orange peel powder. 40g of the orange peel powder, 400g of anhydrous ethanol, and 400g of acetone (in a mass ratio of 1:10:10) were soaked in a 65°C water bath for 3 hours. After filtration, the filtrate was dried in a forced-air drying oven to obtain approximately 3.2g of orange peel extract powder, which is the orange peel extract used in this invention.

[0068] Subsequent experiments will use orange peel extract prepared by this process to prepare cleaning agents.

[0069] Example 2 Preparation of carbon quantum dots from orange peel extract

[0070] 2000g of navel orange peel was air-dried and then ground into powder to obtain approximately 40g of orange peel powder. 20 mL of deionized water, 0.2 mL of 1% CH3COOH solution, 2 mL of 10% CH3COOH solution, or 4 mL of 20% CH3COOH solution, and 0.5 mL of 0.1 mol / L, 1.5 mL of 0.5 mol / L, or 3 mL of 1.0 mol / L NaOH solution were poured into test tubes. 0.5g of orange peel powder was then added to the test tubes. The test tubes were sealed and ultrasonically cleaned for 1-60 minutes. The tubes were then removed and allowed to stand for 2 hours. The solution in the test tubes was filtered through filter paper into a beaker to obtain orange peel extract carbon quantum dots. Tables 1 and 2 below show the parameter combinations involved in the preparation process and the effects of the corresponding methods on the orange peel extract carbon quantum dots obtained.

[0071] Table 1:

[0072]

[0073] Table 2:

[0074]

[0075] The results above show that the best carbon quantum dots from orange peel extract were prepared when the mass ratio of water:CH3COOH:NaOH:orange peel powder was 20:0.2:0.03:0.5, after ultrasonic vibration for 20-30 minutes. Subsequent experiments will use orange peel extract quantum dots prepared by this process to prepare cleaning agents.

[0076] Example 3 Selection of defoamers

[0077] Prepare 2% aqueous solutions of polydimethylsiloxane and tributyl phosphate respectively, and test their foaming properties according to the method specified in GB / T13173 "Test Methods for Surfactants and Detergents".

[0078] Table 3:

[0079]

[0080] Example 4 Cleaning agent formulation screening

[0081] Prepare cleaning agent samples according to the following method and the formula shown in Table 4:

[0082] S1: Mix the prescribed amount of triethanolamine with an appropriate amount of water, then add BTA, mix well, and then add orange peel extract and / or orange peel extract carbon quantum dots to obtain component A;

[0083] S2: Sebacic acid, thiourea, and fatty alcohol polyoxyethylene ether are added to an appropriate amount of water in sequence and mixed evenly to obtain component B;

[0084] S3: Combine the remaining water, component A obtained from S1, component B obtained from S2, polydimethylsiloxane, and isooctyl phosphate (C8H). 19 The product is obtained by mixing O4P evenly.

[0085] Table 4:

[0086]

[0087] Note: The amounts of each component in the table are the weight percentages of each component relative to the total weight of the cleaning agent, and the sum of all components is 100%.

[0088] Example 5 Performance testing

[0089] The cleaning agent prepared in Example 4 was subjected to performance testing.

[0090] 5.1. Contact angle test

[0091] The contact angle was measured according to GB / T 30693-2014. The results are shown in Table 5.

[0092] Table 5:

[0093]

[0094] As can be seen from Table 5, the cleaning agent prepared in Example 5 is superior to the others.

[0095] 5.2. Metal corrosivity

[0096] The brass, aluminum alloy, and steel sheet were weighed separately using a balance. A 5% test solution was prepared by mixing the cleaning agent formulated in Example 4 with water and heated in a constant temperature water bath at (40±2)℃. The brass, aluminum alloy, and steel sheet were then added, and the solution was kept statically at this temperature for 4 hours. After the test, the test pieces were removed, rinsed with clean water, and then washed twice with anhydrous ethanol. They were then dried with hot air, cooled, and their appearance was evaluated. The results are shown in Table 6.

[0097] Table 6:

[0098]

[0099] 5.3. Detergency test

[0100] According to the specifications in Q / CR468-2015 "Cleaning Agent for External Surfaces of High-Speed ​​Trains", the oil-stained test piece was clamped onto the fixture of the washing machine and fully immersed in a 5% test solution in a beaker. The beaker was then placed in a constant temperature water bath at (40±2)℃ for soaking and washing. After removal, the test piece was placed in an oven at (50±2)℃ for drying, cooling, and weighing. The cleaning power was then calculated. The results are shown in Table 7.

[0101] Table 7:

[0102]

[0103] As can be seen from Table 7, the cleaning agent prepared in Example 5 is superior to the others.

[0104] Example 6 Performance comparison with existing cleaning agents

[0105] The inventors selected two commercially available bearing cleaners, namely "Neutral General-Purpose Metal Cleaner - Poligin 7638" (Sample 1) and "Precision Bearing Cleaner - Methacrylamide" (Sample 2), and compared them with the cleaning agent of the present invention (prepared in Example 5) in terms of VOC content, biodegradability, and foaming properties.

[0106] 6.1 The VOC content was determined according to the method described in 6.3.3 of GB 38508-2020. Standard GB 38508 stipulates that the VOC content of water-based cleaning agents should be ≤50g / L. The results are shown in Table 8 below. As can be seen from Table 8, the cleaning agent of this invention contains extremely low VOCs, has minimal environmental impact, and does not contain substances harmful to human health.

[0107] Table 8:

[0108]

[0109] 6.2. Biodegradability testing was performed according to GB15818. The results are shown in Table 9 below.

[0110] Table 9:

[0111]

[0112] 6.3. The foaming test was conducted according to GB13173 standard. The results are shown in Table 10 below.

[0113] Table 10:

[0114]

[0115] Example 7 Practical application of the cleaning agent of the present invention

[0116] The cleaning agent developed in this invention (prepared in Examples 4 and 5) was applied to bearing components removed from high-speed trains. Figure 1 and Figure 2 The following are photographs showing the bearing component before and after on-site cleaning with the cleaning agent of the present invention. Figure 1 To clean the photos before processing, Figure 2 These are photos taken after 20 minutes of high-pressure cleaning. Figure 2 As can be seen, the surfaces of the cleaned bearing components are shiny and new, with no stubborn oil residue.

[0117] Example 8 Screening of preparation methods

[0118] The inventors also studied the preparation method of the cleaning agent of the present invention and found that the order of addition of raw materials has a significant impact on the clarity of the cleaning agent. Specifically, referring to the preparation method described in Example 4, only step S1 is performed as follows: an appropriate amount of water is mixed with the formula amount of BTA, then triethanolamine is added, and after mixing evenly, orange peel extract and / or orange peel extract carbon quantum dots are added to obtain component A. Observation of the clarity of the solution revealed that insoluble matter appeared in component A prepared in this way. See Table 11 below for specific results.

[0119] Table 11:

[0120] .

Claims

1. A corrosion-inhibiting bearing cleaner, wherein, by weight of 100%, the cleaner comprises the following components: orange peel extract 0-2%, orange peel extract carbon quantum dots 0-2%, BTA 0.01-0.7%, thiourea 0.01-0.8%, triethanolamine 2-10%, sebacic acid 2-6%, polydimethylsiloxane 0.01-2.2%, AEO (fatty alcohol polyoxyethylene ether) 0.5-10%, and isooctanol phosphate (C8H2O) 19 O4P) 10-25%, water balance; in, The orange peel extract and the orange peel extract carbon quantum dots are not both 0.

2. The cleaning agent according to claim 1, wherein, The orange peel extract is a navel orange peel extract; Preferably, the orange peel extract is obtained by drying, grinding, extracting with a mixed solution of ethanol and acetone from orange peel, filtering, and drying. More preferably, the orange peel extract is prepared by the following method: orange peel is naturally dried and then ground into orange peel powder, anhydrous ethanol and acetone are added, and the mixture is soaked in a water bath at 65°C for 3 hours. After filtration, the filtrate is dried in a forced-air drying oven to obtain the orange peel extract. More preferably, the mass ratio of the orange peel powder to anhydrous ethanol and acetone is 1:10:

10.

3. The cleaning agent according to claim 1 or 2, wherein the orange peel extract carbon quantum dots are navel orange peel extract carbon quantum dots; Preferably, the orange peel extract carbon quantum dots are obtained by dissolving orange peel powder in a mixed solution of water, CH3COOH and NaOH, shaking, allowing it to stand, and then filtering. More preferably, in the mixed solution of water, CH3COOH and NaOH, the mass ratio of water:CH3COOH:NaOH is 20:0.2:0.03; More preferably, the oscillation is performed using an ultrasonic cleaner, and the oscillation time is 20-40 minutes, preferably 20-30 minutes.

4. The cleaning agent according to any one of claims 1-3, wherein the fatty alcohol polyoxyethylene ether is AEO-7 and / or AEO-9, more preferably AEO-7.

5. The cleaning agent according to any one of claims 1-4, wherein, based on a total weight of 100%, the cleaning agent comprises the following components: Orange peel extract 0-1.2%, orange peel extract carbon quantum dots 0.5-2%, BTA 0.01-0.4%, thiourea 0.01-0.1%, triethanolamine 2-4.5%, sebacic acid 3-6%, polydimethylsiloxane 0.1-2.2%, AEO (fatty alcohol polyoxyethylene ether) 0.5-5%, isooctanol phosphate (C8H) 19 O4P) 15-25%, water balance; Preferably, the cleaning agent comprises the following components: Orange peel extract carbon quantum dots 0.5-2%, BTA 0.01-0.4%, thiourea 0.01-0.1%, triethanolamine 2-4.5%, sebacic acid 3-6%, polydimethylsiloxane 0.1-2.2%, AEO (fatty alcohol polyoxyethylene ether) 0.5-5%, isooctanol phosphate (C8H) 19 O4P) 15-25%, water balance.

6. The cleaning agent according to any one of claims 1-5, wherein, based on a total weight of 100%, the cleaning agent comprises the following components: Orange peel extract: carbon quantum dots 1.2%, BTA 0.4%, thiourea 0.1%, triethanolamine 4.5%, sebacic acid 3%, polydimethylsiloxane 2.2%, AEO (fatty alcohol polyoxyethylene ether) 5%, isooctanol phosphate (C8H) 19 O4P) 17%, water balance; or Orange peel extract 1.2%, BTA 0.4%, thiourea 0.1%, triethanolamine 4.5%, sebacic acid 3%, polydimethylsiloxane 2.2%, AEO (fatty alcohol polyoxyethylene ether) 5%, isooctanol phosphate (C8H) 19 O4P) 17%, water balance.

7. A method for preparing a cleaning agent according to any one of claims 1-6, the method comprising the following steps: S1: Mix the prescribed amount of triethanolamine with an appropriate amount of water, then add BTA, mix well, and then add orange peel extract and / or orange peel extract carbon quantum dots to obtain component A; S2: Sebacic acid, thiourea, and fatty alcohol polyoxyethylene ether are added to an appropriate amount of water in sequence and mixed evenly to obtain component B; S3: Combine the remaining water, component A obtained from S1, component B obtained from S2, polydimethylsiloxane, and isooctyl phosphate (C8H). 19 The product is obtained by mixing O4P evenly.

8. Use of the cleaning agent according to any one of claims 1-6 in bearing cleaning; Preferably, the bearing is a bearing for railway vehicles and subway vehicles.

9. A method for preparing carbon quantum dots from orange peel extract, wherein, The method includes the following steps: dissolving orange peel powder in a mixed solution of water, CH3COOH and NaOH, shaking, letting it stand, and filtering to obtain the product; Preferably, the orange peel powder is obtained by grinding naturally dried orange peel; More preferably, in the mixed solution of water, CH3COOH and NaOH, the mass ratio of water, CH3COOH and NaOH is 20 : 0.2 : 0.03; More preferably, the oscillation is performed using an ultrasonic cleaner, and the oscillation time is 20-40 minutes, preferably 20-30 minutes.

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