Aluminum alloy cleaning agent and preparation method and application thereof

Abstract

The invention discloses an aluminum alloy cleaning agent and a preparation method and application thereof, and belongs to the technical field of cleaning agents. The aluminum alloy cleaning agent is prepared from the following preparation raw materials in parts by weight: 7 to 12 parts of an ionic surfactant A, 3.5 to 6 parts of a nonionic surfactant B, 0.2 to 3 parts of a dispersing cosolvent, 0.8 to 1.5 parts of a penetrating agent, 3 to 6 parts of a chelating agent, 0.2 to 2 parts of a corrosion inhibitor, 0.01 to 0.05 part of a de-foaming agent and 67 to 83 parts of de-ionized water, the nonionic surfactant A comprises at least one of fatty alcohol-polyoxyethylene ether and nonylphenol polyoxyethylene ether; the nonionic surfactant B comprises sorbitan fatty acid ester; the dispersing co-solvent includes a polyol. According to the aluminum alloy cleaning agent provided by the invention, the cleaning power can be effectively improved, aluminum alloy gloss loss is avoided, and the formula is environment-friendly and green. The invention further provides a preparation method and application of the aluminum alloy cleaning agent.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning agents, in particular to an aluminum alloy cleaning agent and a preparation method and application thereof. Background Art

[0002] Series VI aluminum alloys (Al-Mg-Si) are a key aluminum alloy family. As lightweight structural materials that can be heat-treated and strengthened, they hold a significant position in the industrial sector thanks to their excellent strength-to-weight ratio, good formability, and corrosion resistance. With the continued advancement of global energy conservation and emission reduction policies and the rapid development of high-end manufacturing technologies, the application prospects of this series of alloys in strategic industries such as new energy vehicles, aerospace, and consumer electronics continue to expand.

[0003] In the new energy vehicle sector, 6-series aluminum alloys have become the preferred material for battery pack housings and body structural components. Their high specific strength can effectively improve vehicle range. Recent research shows that through microalloying (adding 0.2% Sc) and optimizing the aging process (T7x treatment), the tensile strength of 6082 alloy can exceed 400 MPa while maintaining good weldability. In the consumer electronics sector, 6-series aluminum alloys are widely used in precision components such as smartphone midframes and laptop casings due to their excellent thermal conductivity (180-200 W / (m·K)) and adaptability to surface treatments.

[0004] It is worth noting that with the development of emerging technologies such as 5G communications and artificial intelligence, the market has placed higher demands on the surface quality of aluminum alloy components. The problem of residual grinding paste (primarily composed of diamond abrasives and paraffin-based binders) generated during precision machining needs to be urgently addressed. Traditional acid and alkaline cleaning processes can easily lead to excessive surface corrosion (pitting depths of up to 3-5μm), while organic solvent cleaning poses environmental pollution risks. Furthermore, existing aluminum alloy cleaning agents can cause severe gloss loss on the metal surface, impacting subsequent processing.

[0005] Therefore, the development of new cleaning agents for series VI aluminum alloys has become a current research hotspot. The technical goal is to ensure surface cleanliness while maintaining the original surface finish (Ra < 0.05 μm). The cleaning agents described in the relevant art cannot meet the above requirements. Summary of the Invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an aluminum alloy cleaning agent that can effectively improve the cleaning power of aluminum alloys and prevent the aluminum alloy surface from losing its gloss. The aluminum alloy cleaning agent provided by the present invention has an environmentally friendly and green formula.

[0007] The present invention also provides a preparation method of the aluminum alloy cleaning agent.

[0008] The present invention also provides application of the aluminum alloy cleaning agent.

[0009] According to an embodiment of the first aspect of the present invention, an aluminum alloy cleaning agent is provided. The aluminum alloy cleaning agent comprises the following raw materials in parts by weight:

[0010]

[0011] The nonionic surfactant A includes at least one of fatty alcohol polyoxyethylene ether and nonylphenol polyoxyethylene ether;

[0012] The nonionic surfactant B comprises sorbitan fatty acid ester;

[0013] The dispersing co-solvent includes a polyol.

[0014] The aluminum alloy cleaning agent according to the embodiment of the present invention has at least the following beneficial effects:

[0015] The aluminum alloy cleaning agent provided by the present invention comprises a nonionic surfactant A and a nonionic surfactant B which, after being dissolved in water, can self-assemble to form micelles, wherein one end of the micelles is a surfactant molecule with a cleaning function; the other end can adsorb corrosion inhibitor molecules, so that the nonionic surfactant and the corrosion inhibitor are oriented. Combined with the dispersing co-solvent, the two opposing and contradictory systems of cleaning and corrosion inhibition can be organically combined. The corrosion inhibitor can provide strong protection for the aluminum alloy, and the nonionic surfactant A and the nonionic surfactant B can quickly strip and emulsify stains such as oil stains, thereby achieving a stable solution state and allowing each component to gradually and fully exert its own special properties.

[0016] The aluminum alloy cleaning agent provided by the present invention has a harmful substance concentration far below the limit concentration standard, and the wastewater generated by using the aluminum alloy cleaning agent is easy to biodegrade and be treated and discharged.

[0017] Compared with existing aluminum alloy cleaning agents, the aluminum alloy cleaning agent provided by the present invention has a significant synergistic effect between the various components and the dosage of the components. Overall, it has better compatibility with aluminum alloys such as the sixth series aluminum alloy, and has strong cleaning, corrosion resistance and rust prevention properties. The aluminum alloy surface does not lose its gloss after cleaning. The surfactant system used targets stains more comprehensively, is easier to biodegrade and treat with sewage, and is safer for the human body.

[0018] According to some embodiments of the present invention, the number of carbon atoms in a single molecule of the fatty alcohol polyoxyethylene ether is 20 to 30, for example, 22, 24, 26 or 28.

[0019] According to some embodiments of the present invention, the number of oxyethylene groups in a single molecule of the nonylphenol polyoxyethylene ether is 7 to 10, for example, 8 or 9.

[0020] According to some embodiments of the present invention, the nonionic surfactant A includes at least one of AEO-9, AEO-4 and NP-10.

[0021] According to some embodiments of the present invention, the number of carbon atoms in a single molecule of the sorbitan fatty acid ester is 22 to 24, for example, 23.

[0022] According to some embodiments of the present invention, the nonionic surfactant B includes at least one of Span-40 and Span-80.

[0023] According to some embodiments of the present invention, the dispersing co-solvent includes at least one of ethylene glycol, glycerol, diethylene glycol and sorbitol.

[0024] According to some embodiments of the present invention, the penetrant includes C2 to C 10 At least one of fatty alcohol polyoxyethylene ether.

[0025] According to some embodiments of the present invention, the chelating agent includes at least one of tetrasodium ethylenediaminetetraacetic acid, sodium gluconate, sodium nitrilotriacetate (NTA), and sodium citrate.

[0026] According to some embodiments of the present invention, the corrosion inhibitor includes at least one of an aluminum corrosion inhibitor and a magnesium corrosion inhibitor.

[0027] According to some embodiments of the present invention, the aluminum corrosion inhibitor includes at least one of a siloxane ketone aluminum corrosion inhibitor, a silicate aluminum corrosion inhibitor, and an organic acid aluminum corrosion inhibitor.

[0028] According to some embodiments of the present invention, the aluminum corrosion inhibitor further includes at least one of benzotriazole (BTA) and tolutriazole (TTA).

[0029] According to some embodiments of the present invention, the magnesium corrosion inhibitor includes at least one of an imidazoline magnesium corrosion inhibitor, a sodium carboxylate magnesium corrosion inhibitor, and an acetylene glycol magnesium corrosion inhibitor.

[0030] According to some embodiments of the present invention, the defoaming agent includes at least one of an organosilicon defoaming agent, a polyether defoaming agent, and a mineral oil defoaming agent.

[0031] According to some embodiments of the present invention, the aluminum alloy cleaning agent includes the following raw materials in parts by weight:

[0032] 7 to 7.5 parts of nonionic surfactant A;

[0033] Nonionic surfactant B 5.5-6 parts;

[0034] 0.2 to 3 parts of dispersing cosolvent; for example, about 0.5 parts, 1 part, 1.5 parts, 2 parts or about 2.5 parts;

[0035] 0.8 to 1.5 parts of penetrant; for example, about 1.0 part or about 1.2 parts;

[0036] 3 to 6 parts of a chelating agent; for example, about 4 parts or about 5 parts;

[0037] 0.2 to 2 parts of corrosion inhibitor; for example, about 0.5 parts, 1.0 parts or about 1.5 parts;

[0038] 0.01 to 0.05 parts of defoaming agent; for example, about 0.02 parts, 0.03 parts or about 0.04 parts;

[0039] 67.35 to 82.99 parts of deionized water, for example, about 68 parts, 70 parts, 72 parts, 74 parts, 76 parts, 78 parts, 80 parts, or about 82 parts.

[0040] According to some embodiments of the present invention, the aluminum alloy cleaning agent includes the following raw materials in parts by weight:

[0041] 9-12 parts of nonionic surfactant A;

[0042]

[0043] According to some embodiments of the present invention, the aluminum alloy cleaning agent includes the following raw materials in parts by weight:

[0044]

[0045] According to an embodiment of the second aspect of the present invention, a method for preparing the aluminum alloy cleaning agent described in the embodiment of the first aspect of the present invention is provided. The preparation method includes mixing raw materials for preparing the aluminum alloy cleaning agent.

[0046] Since the preparation method adopts all the technical solutions of the aluminum alloy cleaning agent of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment.

[0047] According to some embodiments of the present invention, the mixing of the preparation raw materials is performed by adding all the preparation raw materials at once and then stirring to dissolve them.

[0048] According to some embodiments of the present invention, the mixing of the raw materials and the order of adding the raw materials are not limited. Specifically, the order of adding the raw materials does not affect the cleaning performance of the final aluminum alloy cleaning agent.

[0049] According to some embodiments of the present invention, the preparation method comprises the following steps:

[0050] S1. Warming the deionized water and stirring;

[0051] S2. Add a surfactant, a dispersing solvent, a penetrant, a chelating agent, a corrosion inhibitor and a defoaming agent to the system obtained in step S1 in sequence, and then stir and mix.

[0052] By adjusting the order of adding the raw materials, the uniformity of mixing and dispersion between the raw materials can be significantly improved, the difficulty of dispersion can be reduced, and the time required for dispersion can be saved.

[0053] According to some embodiments of the present invention, in step S1, the temperature of the heating is 45-55°C, for example, about 50°C.

[0054] According to some embodiments of the present invention, in step S1, the stirring speed is 40-70 rpm, for example, about 50 rpm or about 60 rpm.

[0055] According to some embodiments of the present invention, in step S2, the surfactants are surfactant A and surfactant B. In step S2, the order of adding the two surfactants is not limited, and they can be added simultaneously or in sequence.

[0056] According to some embodiments of the present invention, in step S2, the stirring and mixing speed is the same as the stirring speed in step S1. In actual production, the speed setting is kept unchanged, but due to changes in system viscosity, the speed may fluctuate by ±2%.

[0057] According to some embodiments of the present invention, in step S2, the stirring and mixing time is 30 to 60 minutes, for example, about 40 minutes or about 50 minutes.

[0058] According to some embodiments of the present invention, in step S2, when adding the latter preparation raw material, it is necessary to ensure that the former preparation raw material is dissolved.

[0059] According to an embodiment of the third aspect of the present invention, there is provided a use of the aluminum alloy cleaning agent described in an embodiment of the first aspect of the present invention in cleaning aluminum alloy.

[0060] Since the application adopts all the technical solutions of the aluminum alloy cleaning agent of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment.

[0061] According to some embodiments of the present invention, the aluminum alloy includes six series aluminum alloys. Different series of aluminum alloys have different material hardness and corrosion resistance, so the adhesion of pollutants is different. For softer aluminum alloys, pollutants may penetrate into the interior of the material, making cleaning more difficult. Furthermore, different types of aluminum alloys have different types of alloying elements, and the corrosion performance of aluminum alloy cleaning agents on different types of alloys is also different. Therefore, when the same aluminum alloy cleaning agent is used to clean different types of aluminum alloys, the cleaning effect will be different. The aluminum alloy cleaning agent provided by the present invention is applicable to multiple series of aluminum alloys, but it is most effective only when it is used on six series aluminum alloys.

[0062] According to some embodiments of the present invention, the cleaning method includes at least one of high-pressure spray cleaning, manual cleaning, ultrasonic cleaning, and bubbling cleaning. The aluminum alloy cleaning agent provided by the present invention is applicable to various cleaning methods, has a wide range of uses, and is flexible and diverse in use.

[0063] According to some embodiments of the present invention, the stains targeted by the cleaning include at least one of cutting fluid, oil stains, and grinding paste stains.

[0064] According to some embodiments of the present invention, the stains targeted for cleaning are abrasive paste stains. Abrasive paste stains differ significantly from other types of stains. Different stains dissolve and are removed to varying degrees by the same cleaning agent. Even if a cleaning agent can remove other types of stains, its ability to remove aluminum alloy abrasive paste stains is unpredictable.

[0065] Unless otherwise specified, the term “about” in the present invention actually means that the error is allowed to be within the range of ±2%, for example, about 100 actually means 100±2%×100.

[0066] Unless otherwise specified, “between” in the present invention includes the number itself, for example, “between 2 and 3” includes the endpoint values 2 and 3.

[0067] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the present invention. DETAILED DESCRIPTION

[0068] The following will clearly and completely describe the concept and technical effects of the present invention in conjunction with the embodiments to fully understand the purpose, features and effects of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0069] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0070] Example 1

[0071] This example provides an aluminum alloy cleaning agent and a preparation method thereof, wherein the raw materials for preparing the aluminum alloy cleaning agent are the following reagents in parts by weight:

[0072]

[0073]

[0074] The preparation method of the aluminum alloy cleaning agent in this example is as follows:

[0075] S1. Deionized water was added to the stirred tank, then the temperature was raised to 50°C and stirring was started at 50 rpm.

[0076] S2. Add a composite surfactant (including nonionic surfactant A and nonionic surfactant B), a dispersing solvent, a penetrant, a chelating agent, a corrosion inhibitor and a defoaming agent to the deionized water in step S1 in sequence; stir for 60 minutes and mix well.

[0077] Example 2

[0078] This example provides an aluminum alloy cleaning agent and a preparation method thereof, which differs from Example 1 in that:

[0079] (1) The composition of the raw materials is different, and the specific composition is as follows:

[0080]

[0081] (2) In the preparation method, the stirring speed in step S1 is 70 rpm; the stirring time in step S2 is 40 min.

[0082] Example 3

[0083] This example provides an aluminum alloy cleaning agent and a preparation method thereof, which differs from Example 1 in that:

[0084] (1) The composition of the raw materials is different, and the specific composition is as follows:

[0085]

[0086]

[0087] (2) In the preparation method, the stirring speed in step S1 is 60 rpm.

[0088] Comparative Example 1

[0089] This example provides an aluminum alloy cleaning agent, which differs from Example 1 in that:

[0090] In this example, the amount of nonionic surfactant A (AEO-9) added is 14 parts.

[0091] Comparative Example 2

[0092] This example provides an aluminum alloy cleaning agent, which differs from Example 1 in that:

[0093] In this example, the amount of nonionic surfactant A (AEO-9) added is 5 parts.

[0094] Comparative Example 3

[0095] This example provides an aluminum alloy cleaning agent, which differs from Example 1 in that:

[0096] In this example, the nonionic surfactant A is NP-10, the addition amount is 13 parts, and no nonionic surfactant B is added.

[0097] Comparative Example 4

[0098] This example provides an aluminum alloy cleaning agent, which differs from Example 1 in that:

[0099] The dispersing solvent was replaced with an equal mass of acetone.

[0100] Comparative Example 5

[0101] This example provides an aluminum alloy cleaning agent, which differs from Example 1 in that:

[0102] No chelating agents added.

[0103] Comparative Example 6

[0104] In this example, a six-series aluminum alloy cleaning agent in the Chinese patent document "CN113512728A" was prepared. The specific formula is as follows:

[0105] Comparative Example 7

[0106] In this example, a six-series aluminum alloy cleaning agent in the Chinese patent document "CN110923727A" was prepared. The specific formula is as follows:

[0107]

[0108]

[0109] Comparative Example 8

[0110] This example provides an aluminum alloy cleaning agent with reference to the patent document "CN111154563A" Example 1, the specific formula is as follows:

[0111] Comparative Example 9

[0112] This example provides an aluminum alloy cleaning agent with reference to the patent document "CN115595598A" Example 1, the specific formula is as follows:

[0113] Comparative Example 10

[0114] This example provides an aluminum alloy cleaning agent with reference to the patent document "CN109234052A" Example 1, the specific formula is as follows:

[0115]

[0116] Test example

[0117] This example tests the physicochemical characteristics and cleaning effects of the aluminum alloy cleaning agents obtained in the examples and comparative examples. The physicochemical characteristics include visual appearance, specific gravity test and pH test with reference to ASTM D891. The cleaning effect refers to the cleaning power test method of GB / T 35759-2017 metal cleaning agent, and 120nm silica sol abrasive paste (FMC830-P, Ishihara Industry Co., Ltd., Japan) is used instead of the artificial oil pollution in the standard. At the same time, the test piece used is an aluminum alloy 6063 test piece, and the temperature is controlled at 50±2°C for testing. Visually observe whether the surface of the test piece changes color after cleaning and calculate the cleaning power. The specific data results are shown in Table 1.

[0118] Table 1 Performance test results of the aluminum alloy cleaning agents obtained in Examples and Comparative Examples

[0119]

[0120]

[0121] It can be seen from Table 1 that Examples 1 to 3 are better than other comparative examples in terms of cleaning ability and corrosion resistance for six-series aluminum alloys. This is because within this ratio range, the synergistic effect of surfactants and various additives reaches the best, so the cleaning effect on the grinding paste is also the best and the protection ability for the aluminum alloy is the strongest; while outside this ratio range, the system's cleaning ability for the grinding paste will be weakened, and may cause the aluminum alloy to lose its gloss and become dark. Furthermore, although the aluminum alloy cleaning agents provided by other related technologies may have a strong cleaning ability for pollutants such as cutting fluids and oil stains, their cleaning effect on grinding pastes is not good. It is precisely because of the above advantages that the aluminum alloy cleaning agent provided by the present invention is expected to be widely used in cleaning surface stains (especially grinding paste stains) of aluminum alloys (especially six-series aluminum alloys).

[0122] While the embodiments of the present invention have been described in detail above, the present invention is not limited to the embodiments described above. Various modifications may be made within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof may be combined with one another unless there is a conflict.

Claims

1. An aluminum alloy cleaning agent, characterized in that: The aluminum alloy cleaning agent comprises the following raw materials in parts by weight: Nonionic surfactant A: 7-12 parts, nonionic surfactant B: 3.5-6 parts, dispersing cosolvent: 0.2-3 parts, penetrant: 0.8-1.5 parts, chelating agent: 3-6 parts, corrosion inhibitor: 0.2-2 parts, defoaming agent: 0.01-0.05 parts, deionized water: 67-83 parts; The nonionic surfactant A includes at least one of fatty alcohol polyoxyethylene ether and nonylphenol polyoxyethylene ether; The nonionic surfactant B comprises sorbitan fatty acid ester; The dispersing co-solvent includes a polyol.

2. The aluminum alloy cleaning agent according to claim 1, characterized in that The number of carbon atoms in a single molecule of the fatty alcohol polyoxyethylene ether is 20 to 30; And / or, in a single molecule of the nonylphenol polyoxyethylene ether, the number of oxyethylene groups is 7 to 10.

3. The aluminum alloy cleaning agent according to claim 1, characterized in that The number of carbon atoms in a single molecule of the sorbitan fatty acid ester is 22 to 24.

4. The aluminum alloy cleaning agent according to claim 1, characterized in that The dispersing auxiliary solvent includes at least one of ethylene glycol, glycerol, diethylene glycol and sorbitol.

5. The aluminum alloy cleaning agent according to any one of claims 1 to 4, characterized in that: The penetrant includes C2~C 10 At least one of fatty alcohol polyoxyethylene ethers; And / or, the chelating agent includes at least one of tetrasodium ethylenediaminetetraacetic acid, sodium gluconate, sodium nitrilotriacetate and sodium citrate.

6. The aluminum alloy cleaning agent according to any one of claims 1 to 4, characterized in that: The corrosion inhibitor includes at least one of an aluminum corrosion inhibitor and a magnesium corrosion inhibitor; Preferably, the aluminum corrosion inhibitor includes at least one of a siloxane ketone aluminum corrosion inhibitor, a silicate aluminum corrosion inhibitor, and an organic acid aluminum corrosion inhibitor; Preferably, the magnesium corrosion inhibitor includes at least one of an imidazoline magnesium corrosion inhibitor, a sodium carboxylate magnesium corrosion inhibitor, and an acetylene glycol magnesium corrosion inhibitor.

7. The aluminum alloy cleaning agent according to any one of claims 1 to 4, characterized in that: The defoaming agent includes at least one of an organosilicon defoaming agent, a polyether defoaming agent and a mineral oil defoaming agent.

8. A method for preparing the aluminum alloy cleaning agent according to any one of claims 1 to 7, characterized in that: The preparation method comprises mixing raw materials for preparing the aluminum alloy cleaning agent.

9. Use of the aluminum alloy cleaning agent according to any one of claims 1 to 7 in cleaning aluminum alloy.

10. The use according to claim 9, characterized in that The aluminum alloy includes six series aluminum alloys.

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