Cleaning agent for aluminum magnesium alloy based on low-altitude aircraft and preparation method of cleaning agent

Abstract

The invention relates to a cleaning agent for aluminum magnesium alloy based on a low-altitude aircraft and a preparation method of the cleaning agent, and belongs to the technical field of cleaning agents, the cleaning agent comprises the following raw materials: disodium monolauryl sulfosuccinate, APG-0810, ECOSURF Sa-9, sodium citrate, absolute ethyl alcohol, polyaspartic acid, benzotriazole, phytic acid and deionized water. According to the invention, the anionic surfactant and the nonionic surfactant are compounded, so that the permeation, emulsification and dispersion effects of the system on stains can be effectively enhanced to facilitate the removal of the stains, and the prepared cleaning agent is endowed with excellent cleaning efficiency. In addition, sodium citrate and absolute ethyl alcohol are added to effectively assist the surfactant to enhance the cleaning efficiency of the cleaning agent; the polyaspartic acid, the benzotriazole and the phytic acid are added, so that the corrosion inhibition effect is achieved by reducing the migration rate of metal ions in the erosion process and forming a dual protection mechanism, and the prepared cleaning agent has outstanding corrosion inhibition performance.

Description

Technical Field

[0001] The present invention belongs to the technical field of cleaning agents, and specifically relates to a cleaning agent for aluminum-magnesium alloys based on low-altitude aircraft and a preparation method thereof. Background Art

[0002] In the field of low-altitude aircraft, aluminum-magnesium alloy has become an ideal material for manufacturing key components such as fuselage, wings, engine components, and landing gears due to its advantages of low density, high strength, good thermal conductivity, and electrical conductivity, providing strong support for the aircraft to achieve lightweight and high-performance flight. However, in the complex low-altitude flight environment of low-altitude aircraft, it is extremely vulnerable to contamination by oxygen, moisture, pollutants, and microorganisms in the air, and a large amount of oil stains, dust, and other pollutants will remain on the surface of the aluminum-magnesium alloy. These pollutants will not only damage the smoothness and aesthetics of the aluminum-magnesium alloy surface, but also seriously affect its performance and service life. To solve this problem, a cleaning agent for aluminum-magnesium alloys based on low-altitude aircraft has emerged as the times require.

[0003] However, for the surface of aluminum-magnesium alloy after long-term accumulation, stubborn dirt is formed after mixing with impurities such as dust. Existing cleaning agents often can only remove a part of the surface and cannot penetrate deep into the dirt for thorough cleaning, that is, the cleaning power is still lacking. In addition, during the cleaning process, when existing cleaning agents come into contact with the surface of aluminum-magnesium alloy, they may cause certain corrosion to the metal surface. Although some existing cleaning agents have certain corrosion inhibition components, their corrosion inhibition effects often only play a certain protective role in a short period of time. After cleaning, the surface of the aluminum-magnesium alloy is still easily corroded by the surrounding environment. Especially in the complex flight environment of low-altitude aircraft, factors such as oxygen, moisture, and pollutants in the air will accelerate the corrosion process of the aluminum-magnesium alloy.

[0004] Therefore, there are certain pain points in the cleaning ability and corrosion inhibition performance of existing cleaning agents for aluminum-magnesium alloys on the market. These problems limit the wide application of cleaning agents in the field of cleaning aluminum-magnesium alloys of low-altitude aircraft. Then, it is very important to develop a new type of cleaning agent that can overcome these pain points to meet the needs of cleaning aluminum-magnesium alloys of low-altitude aircraft and ensure the safe operation and performance of low-altitude aircraft. Summary of the Invention

[0005] The purpose of the present invention is to provide a cleaning agent for aluminum-magnesium alloys based on low-altitude aircraft and a preparation method thereof, which solves the problems of poor cleaning effect and corrosion inhibition performance of existing cleaning agents.

[0006] The purpose of the present invention can be achieved by the following technical solutions: A cleaning agent for aluminum-magnesium alloys based on low-altitude aircraft, the cleaning agent comprises the following raw materials: Surfactants, auxiliaries, polyaspartic acid, benzotriazole, phytic acid and deionized water.

[0007] As a preferred technical solution of the present invention, the surfactant includes an anionic surfactant and a non-ionic surfactant.

[0008] Further, the anionic surfactant includes disodium monolauryl sulfosuccinate; Disodium monolauryl sulfosuccinate is an anionic surfactant with good dispersing ability. In addition, it also has a certain peeling effect, which can effectively reduce the adhesion force between stains.

[0009] Further, the non-ionic surfactant includes APG-0810 and ECOSURF Sa-9; APG-0810, product name: APG-0810, is a non-ionic surfactant with characteristics such as low surface tension, strong wetting power, strong detergency and strong compatibility, and its biodegradation is rapid and complete.

[0010] ECOSURF Sa-9 is a non-ionic surfactant, containing 55-80% of C6-C12 and 15-40% of C10-C16 ethoxylated and propoxylated alcohols; its compact molecular structure endows it with excellent wetting properties, and it also has the characteristics of rapid adsorption, dissolution, detergency and easy biodegradation.

[0011] As a preferred technical solution of the present invention, the auxiliary includes sodium citrate and absolute ethanol.

[0012] As a preferred technical solution of the present invention, the weight parts of each raw material of the cleaning agent include: Disodium monolauryl sulfosuccinate is 3.5-4 parts, APG-0810 is 4-5 parts, ECOSURF Sa-9 is 4-4.5 parts, sodium citrate is 0.3-1.5 parts, absolute ethanol is 3-4 parts, polyaspartic acid is 4-7 parts, benzotriazole is 4-5.5 parts, phytic acid is 2-2.5 parts, and deionized water is made up to 100 parts.

[0013] A preparation method of a cleaning agent for aluminum-magnesium alloy based on a low-altitude aircraft includes the following steps: Mix absolute ethanol and deionized water evenly, then add benzotriazole and stir evenly, and then sequentially add phytic acid, disodium monolauryl sulfosuccinate, APG-0810, ECOSURF Sa-9, sodium citrate and polyaspartic acid, stir at a controlled speed, and adjust the pH to obtain the finished cleaning agent.

[0014] As a preferred technical solution of the present invention, the speed of the controlled-speed stirring is 75 - 100 r / min, and the time is 30 - 60 min.

[0015] As a preferred technical solution of the present invention, the reagents used for pH adjustment include 1 wt% sodium hydroxide solution and 1 wt% phosphoric acid solution.

[0016] As a preferred technical solution of the present invention, the pH adjustment is to adjust to pH = 7.5 - 8.5.

[0017] Advantages of the present invention: (1) The surface oil layer of magnesium-aluminum metal has problems such as being difficult to peel off and having a relatively tight adhesion. Therefore, the present invention uses a compound of anionic and non-ionic surfactants with fast wettability, strong penetration power, good emulsification effect, and excellent biodegradability. Specifically, disodium lauryl sulfosuccinate with good dispersibility is selected as the anionic surfactant, and ECOSURF Sa-9 and APG-0810 with good wetting power, emulsifying property, and penetration power are compounded as non-ionic surfactants; disodium lauryl sulfosuccinate is adsorbed on the stain interface first, APG-0810 then destroys the binding force between the stain-metal interface, and ECOSURF Sa-9 prevents droplet aggregation, thereby enhancing the penetration, emulsification, and dispersion effects of the system on the stain to facilitate the removal of the stain, endowing the prepared cleaning agent with excellent cleaning performance.

[0018] (2) The sodium citrate added in the present invention can disperse the dirt particles in the solution through charge repulsion, and the addition of absolute ethanol can increase the Zeta potential of the matrix and the stain. The two can jointly prevent the flocculation of dirt particles and their redeposition on the cleaning surface, more effectively assisting the surfactant to enhance the cleaning performance of the cleaning agent.

[0019] (3) The present invention adds polyaspartic acid containing multiple carboxyl groups to chelate with metal ions such as magnesium and aluminum preferentially to form stable complexes, thereby reducing the migration rate of metal ions during the erosion process; on this basis, benzotriazole and phytic acid are also added. The nitrogen element in benzotriazole forms a coordination bond with the surface active sites of aluminum and magnesium to generate a dense film, thereby preventing erosion; and the phytic acid molecule contains phosphate groups, which can chelate with metal ions and fill the voids in the film, thereby enhancing the density and stability of the film, effectively assisting to form a dual protection mechanism with benzotriazole to achieve the corrosion inhibition effect. The cleaning agent thus prepared can have outstanding corrosion inhibition performance. Specific embodiments

[0020] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] The sodium lauryl sulfosuccinate used in the examples, comparative examples and test examples of the present invention, product number: 19040-44-9, was purchased from Hubei Dalili Chemical Co., Ltd.; the APG-0810 used, chemical name: alkyl polyglycoside, brand: GOLDEN, was purchased from Nanjing Gutian Chemical Co., Ltd.; the ECOSURF Sa-9 used, alias: ethoxylated propoxylated alcohol, seed oil alcohol ethoxylate (9EO), was purchased from Merck; the sodium citrate used was purchased from Suzhou Boge Rui Chemical Technology Co., Ltd.; the sodium polyaspartate used was purchased from Jining Fangyu Chemical Co., Ltd.; the benzotriazole used was purchased from Wuhan Xinchuyang Chemical Co., Ltd.; the phytic acid used was purchased from Shanghai Fuzhe Chemical Co., Ltd.; the above will not be elaborated hereinafter. Example 1

[0022] A cleaning agent for aluminum-magnesium alloy based on low-altitude aircraft, the cleaning agent comprises the following raw materials in parts by weight: 3.9 parts of sodium lauryl sulfosuccinate, 4 parts of APG-0810, 4.25 parts of ECOSURF Sa-9, 0.6 part of sodium citrate, 4 parts of absolute ethanol, 6.3 parts of sodium polyaspartate, 5.5 parts of benzotriazole, 2.2 parts of phytic acid, and deionized water is added to make up to 100 parts.

[0023] The preparation method of the cleaning agent for aluminum-magnesium alloy based on low-altitude aircraft comprises the following steps: Mix absolute ethanol and deionized water evenly, add benzotriazole and stir evenly, then successively add phytic acid, sodium lauryl sulfosuccinate, APG-0810, ECOSURF Sa-9, sodium citrate and sodium polyaspartate and stir at a controlled speed, adjust the pH = 7.5, and then the finished cleaning agent can be obtained; The reagents used for adjusting the pH include 1wt% sodium hydroxide solution and 1wt% phosphoric acid solution. Example 2

[0024] A cleaning agent for aluminum-magnesium alloy based on low-altitude aircraft, the cleaning agent comprises the following raw materials in parts by weight: 3.6 parts of disodium lauryl sulfosuccinate, 4.5 parts of APG-0810, 4.5 parts of ECOSURF Sa-9, 0.3 part of sodium citrate, 3.5 parts of absolute ethanol, 4 parts of polyaspartic acid, 4 parts of benzotriazole, 2.3 parts of phytic acid, and deionized water is added to make up 100 parts.

[0025] The preparation method of the cleaning agent for aluminum-magnesium alloy based on low-altitude aircraft includes the following steps: Mix absolute ethanol and deionized water evenly, add benzotriazole and stir evenly, then successively add phytic acid, disodium lauryl sulfosuccinate, APG-0810, ECOSURF Sa-9, sodium citrate and polyaspartic acid, stir at a controlled speed, and adjust the pH to 8.0 to obtain the finished cleaning agent; The reagents used for adjusting the pH include 1wt% sodium hydroxide solution and 1wt% phosphoric acid solution. Example 3

[0026] A cleaning agent for aluminum-magnesium alloy based on low-altitude aircraft, the cleaning agent includes the following raw materials in parts by weight: 3.5 parts of disodium lauryl sulfosuccinate, 5 parts of APG-0810, 4.4 parts of ECOSURF Sa-9, 1.5 parts of sodium citrate, 3.3 parts of absolute ethanol, 5.5 parts of polyaspartic acid, 4.4 parts of benzotriazole, 2.5 parts of phytic acid, and deionized water is added to make up 100 parts.

[0027] The preparation method of the cleaning agent for aluminum-magnesium alloy based on low-altitude aircraft includes the following steps: Mix absolute ethanol and deionized water evenly, add benzotriazole and stir evenly, then successively add phytic acid, disodium lauryl sulfosuccinate, APG-0810, ECOSURF Sa-9, sodium citrate and polyaspartic acid, stir at a controlled speed, and adjust the pH to 8.5 to obtain the finished cleaning agent; The reagents used for adjusting the pH include 1wt% sodium hydroxide solution and 1wt% phosphoric acid solution. Example 4

[0028] A cleaning agent for aluminum-magnesium alloy based on low-altitude aircraft, the cleaning agent includes the following raw materials in parts by weight: 3.8 parts of disodium lauryl sulfosuccinate, 4.25 parts of APG-0810, 4.1 parts of ECOSURF Sa-9, 1.2 parts of sodium citrate, 3.8 parts of absolute ethanol, 4.8 parts of polyaspartic acid, 5.2 parts of benzotriazole, 2.4 parts of phytic acid, and deionized water is added to make up 100 parts.

[0029] The preparation method of the cleaning agent for aluminum-magnesium alloy based on low-altitude aircraft includes the following steps: Mix absolute ethanol and deionized water evenly, add benzotriazole and stir evenly, then add phytic acid, disodium monolauryl sulfosuccinate, APG-0810, ECOSURF Sa-9, sodium citrate and polyaspartic acid in sequence and stir at a controlled speed, adjust the pH to 7.5 to obtain the finished cleaning agent; The reagents used for adjusting the pH include 1 wt% sodium hydroxide solution and 1 wt% phosphoric acid solution. Example 5

[0030] A cleaning agent for aluminum-magnesium alloy based on low-altitude aircraft, the cleaning agent comprises the following raw materials in parts by weight: 4 parts of disodium monolauryl sulfosuccinate, 4.75 parts of APG-0810, 4 parts of ECOSURF Sa-9, 0.9 part of sodium citrate, 3 parts of absolute ethanol, 7 parts of polyaspartic acid, 4.8 parts of benzotriazole, 2 parts of phytic acid, and make up to 100 parts with deionized water.

[0031] The preparation method of the cleaning agent for aluminum-magnesium alloy based on low-altitude aircraft comprises the following steps: Mix absolute ethanol and deionized water evenly, add benzotriazole and stir evenly, then add phytic acid, disodium monolauryl sulfosuccinate, APG-0810, ECOSURF Sa-9, sodium citrate and polyaspartic acid in sequence and stir at a controlled speed, adjust the pH to 8.0 to obtain the finished cleaning agent; The reagents used for adjusting the pH include 1 wt% sodium hydroxide solution and 1 wt% phosphoric acid solution.

[0032] Comparative Example 1 Compared with Example 5, the difference is that in Comparative Example 1, disodium monolauryl sulfosuccinate is not added, while APG-0810 is 5.95 parts by weight and ECOSURF Sa-9 is 6.2 parts by weight, and the remaining operation steps and parameters remain unchanged.

[0033] Comparative Example 2 Compared with Example 5, the difference is that in Comparative Example 2, APG-0810 is not added, while disodium monolauryl sulfosuccinate is 5.9 parts by weight and ECOSURF Sa-9 is 6.25 parts by weight, and the remaining operation steps and parameters remain unchanged.

[0034] Comparative Example 3 Compared with Example 5, the difference is that in Comparative Example 3, ECOSURF Sa-9 is not added, while disodium monolauryl sulfosuccinate is 6.03 parts by weight and APG-0810 is 6.12 parts by weight, and the remaining operation steps and parameters remain unchanged.

[0035] Comparative Example 4 Compared with Example 5, the difference is that in Comparative Example 4, sodium citrate is not added, and the remaining operation steps and parameters remain unchanged.

[0036] Comparative Example 5 Compared with Example 5, the difference is that in Comparative Example 5, absolute ethanol is not added, and the remaining operation steps and parameters remain unchanged.

[0037] Test Example 1 Cleaning ability test: According to JB / T 4323.1 - 1999 and JB / T 4323.2–1999, 5052 aluminum-magnesium alloy with a size of 50mm×50mm×4mm was used as the test piece, and the cleaning ability of the cleaning agents prepared in Examples 1 - 5 and Comparative Examples 1 - 5 was tested. The cleaning ability was expressed by the oil removal rate h and calculated according to the following formula: h = [(p2 - p3) / (p2 - p1)] * 100%; In the formula: h is the oil removal rate, p2 - p1 is the amount of oil stain coated on the test piece, and p2 - p3 is the weight of the removed oil stain; The final results are shown in Table 1.

[0038] Table 1 Oil washing rate (%) Example 1 97.2 Example 2 97.4 Example 3 97.3 Example 4 97.0 Example 5 97.8 Comparative Example 1 80.9 Comparative Example 2 86.4 Comparative Example 3 84.0 Comparative Example 4 88.5 Comparative Example 5 90.6 It is not difficult to see from the comparison between Comparative Examples 1 - 3 and the Examples in Table 1 that in Comparative Example 1, anionic surfactants are not added, and in Comparative Examples 2 - 3, certain non-ionic surfactants are not added respectively. The oil removal rate measured in Comparative Example 1 is lower than that in Comparative Examples 2 - 3 and also lower than that in the Examples, indicating that the compounding of anionic and non-ionic surfactants has a synergistic effect. In Comparative Examples 2 - 3, one kind of non-ionic surfactant is missing respectively, and the measured oil removal rate is lower than that in the Examples but higher than that in Comparative Example 1, indicating that the cleaning effect after the compounding of anionic and non-ionic surfactants is good, but a single non-ionic surfactant is still not sufficient to make a cleaning agent with a high cleaning effect, and the compounding of two non-ionic surfactants has the best effect; It is also not difficult to see from the comparison between Comparative Examples 4 - 5 and the Examples that the sodium citrate and absolute ethanol added in the present invention have a positive effect on improving the cleaning ability of the system.

[0039] Comparative Example 6 Compared with Example 5, the difference is that in Comparative Example 6, polyaspartic acid is not added, and the remaining operation steps and parameters remain unchanged.

[0040] Comparative Example 7 Compared with Example 5, the difference is that in Comparative Example 7, benzotriazole is not added, and the remaining operation steps and parameters remain unchanged.

[0041] Comparative Example 8 Compared with Example 5, the difference is that in Comparative Example 8, phytic acid is not added, and the remaining operation steps and parameters remain unchanged.

[0042] Test Example 2 Corrosion performance detection: According to Standards JB / T 4323.1-1999 and JB / T 4323.2–1999, the corrosion performance of the cleaning agents prepared in Examples 1-5 and Comparative Examples 6-8 was tested using 5052 aluminum-magnesium alloy test pieces with dimensions of 50 mm × 50 mm × 4 mm. The weight change was calculated according to the following formula: g = |P1 - P2|; In the formula: g is the weight change value (mg), and P1 and P2 are the masses (mg) of the test piece before and after the corrosion test, respectively; The final results are shown in Table 2.

[0043] Table 2 Weight change (mg) Example 1 0.8 Example 2 0.7 Example 3 0.8 Example 4 0.7 Example 5 0.7 Comparative Example 6 1.7 Comparative Example 7 2.3 Comparative Example 8 2.1 As can be seen from Table 2, the polyaspartic acid, benzotriazole, and phytic acid added in the present invention can all effectively endow the system with outstanding corrosion inhibition performance. At the same time, this can also further enhance the cleaning efficacy of the cleaning agent.

[0044] In the description of the specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0045] The above content is only an example and illustration of the concept of the present invention. Those skilled in the art of the present technology can make various modifications or supplements to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the concept of the invention or exceed the scope defined by the claims of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A cleaning agent for aluminum-magnesium alloy based on low-altitude aircraft, characterized in that, The cleaning agent comprises the following raw materials: Surfactant, auxiliary agent, polyaspartic acid, benzotriazole, phytic acid and deionized water.

2. The cleaning agent for aluminum-magnesium alloy based on low-altitude aircraft according to claim 1, wherein The surfactant includes an anionic surfactant and a non-ionic surfactant.

3. The cleaning agent for aluminum-magnesium alloy based on low-altitude aircraft according to claim 2, wherein The anionic surfactant includes disodium lauryl sulfosuccinate.

4. The cleaning agent for aluminum-magnesium alloy based on low-altitude aircraft according to claim 3, characterized in that, The non-ionic surfactant includes APG-0810 and ECOSURF Sa-9.

5. The cleaning agent for aluminum-magnesium alloy based on low-altitude aircraft according to claim 4, characterized in that, The auxiliary agent includes sodium citrate and absolute ethanol.

6. The cleaning agent for aluminum-magnesium alloy based on low-altitude aircraft according to claim 5, wherein The weight parts of each raw material of the cleaning agent include: Disodium lauryl sulfosuccinate is 3.5 - 4 parts, APG-0810 is 4 - 5 parts, ECOSURF Sa-9 is 4 - 4.5 parts, sodium citrate is 0.3 - 1.5 parts, absolute ethanol is 3 - 4 parts, polyaspartic acid is 4 - 7 parts, benzotriazole is 4 - 5.5 parts, phytic acid is 2 - 2.5 parts, and deionized water is made up to 100 parts.

7. A preparation method of a cleaning agent for aluminum-magnesium alloy based on a low-altitude aircraft as described in claim 4, characterized in that, It includes the following steps: Mix absolute ethanol and deionized water evenly, add benzotriazole and stir evenly, then successively add phytic acid, disodium lauryl sulfosuccinate, APG-0810, ECOSURF Sa-9, sodium citrate and polyaspartic acid, stir at a controlled speed, and adjust the pH to obtain the finished cleaning agent.

8. The preparation method of the cleaning agent for aluminum-magnesium alloy based on low-altitude aircraft according to claim 7, characterized in that, The speed of the controlled-speed stirring is 75 - 100 r / min, and the time is 30 - 60 min.

9. The preparation method of the cleaning agent for aluminum-magnesium alloy based on low-altitude aircraft according to claim 7, characterized in that, The reagents used for adjusting the pH include 1 wt% sodium hydroxide solution and 1 wt% phosphoric acid solution.

10. The preparation method of the cleaning agent for aluminum-magnesium alloy based on low-altitude aircraft according to claim 7, characterized in that, Adjusting the pH means adjusting it to pH = 7.5 - 8.5.