Aluminum alloy cleaning agent, preparation method and application thereof

Abstract

The application 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 comprises the following raw materials in parts by weight: 7-12 parts of ionic surfactant A, 3.5-6 parts of non-ionic surfactant B, 0.2-3 parts of a dispersing solubilizing agent, 0.8-1.5 parts of a penetrating agent, 3-6 parts of a chelating agent, 0.2-2 parts of an inhibitor, 0.01-0.05 parts of a defoaming agent and 67-83 parts of deionized water. The non-ionic surfactant A comprises at least one of a fatty alcohol polyoxyethylene ether and a nonylphenol polyoxyethylene ether. The non-ionic surfactant B comprises a sorbitan fatty acid ester. The dispersing solubilizing agent comprises a polyhydric alcohol. The aluminum alloy cleaning agent can effectively improve cleaning power, avoid aluminum alloy tarnishing, and is environmentally friendly. The application further provides a preparation method and application of the aluminum alloy cleaning agent.

Description

Technical Field

[0001] This invention relates to the field of cleaning agent technology, and in particular to an aluminum alloy cleaning agent, its preparation method, and its application. Background Technology

[0002] Six-series aluminum alloys (Al-Mg-Si series) are an important type of aluminum alloy. As a heat-treatable, lightweight structural material, they occupy an important position in the industrial field due to their excellent strength-to-weight ratio, good formability, and corrosion resistance. With the continuous 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 field of new energy vehicles, six-series aluminum alloys have become the preferred material for battery pack casings and body structural components, as their high specific strength effectively improves vehicle range. Recent research shows that through microalloying (adding 0.2% Sc) and optimized aging processes (T7x treatment), the tensile strength of 6082 alloy can exceed 400 MPa while maintaining good weldability. In the consumer electronics field, six-series aluminum alloys are widely used in precision components such as smartphone frames and laptop casings due to their excellent thermal conductivity (180-200 W / (m·K)) and surface treatment adaptability.

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

[0005] Therefore, the development of novel six-series aluminum alloy cleaning agents has become a current research hotspot, with the technical goal of maintaining the original surface finish (Ra<0.05μm) while ensuring surface cleanliness. The cleaning agents described in related technologies do not meet these requirements. Summary of the Invention

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

[0007] The present invention also provides a method for preparing the above-mentioned aluminum alloy cleaning agent.

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

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

[0010]

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

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

[0013] The dispersing co-solvent includes polyols.

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

[0015] The aluminum alloy cleaning agent provided by this invention, after nonionic surfactants A and B are dissolved in water, can self-assemble into micelles. One end of the micelle is a surfactant molecule with cleaning function; the other end adsorbs corrosion inhibitor molecules, causing the nonionic surfactant and corrosion inhibitor to be oriented. Combined with the dispersion co-solvent, the two opposing systems of cleaning and corrosion inhibition can be organically combined. The corrosion inhibitor can provide strong protection for the aluminum alloy, and the nonionic surfactants A and B can quickly peel off and emulsify stains such as oil, 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 this invention has a concentration of harmful substances that is far below the limit concentration standard, and the wastewater generated by using the aluminum alloy cleaning agent is easy to biodegrade and treat for discharge.

[0017] Compared with existing aluminum alloy cleaning agents, the aluminum alloy cleaning agent provided by this invention has a significant synergistic effect between its components and the amount of each component. Overall, it has better compatibility with aluminum alloys such as six-series aluminum alloys. It has strong cleaning, anti-corrosion and rust prevention properties. The aluminum alloy surface does not lose its luster after cleaning. The surfactant system used targets more comprehensive stains and is more easily biodegradable and treated in wastewater, making it safer for human use.

[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, it can be 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, it can be 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 dehydrated sorbitan fatty acid ester is 22 to 24. For example, it can specifically be 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 comprises C2 to C3. 10 At least one of fatty alcohol polyoxyethylene ethers.

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

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

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

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

[0029] According to some embodiments of the present invention, the magnesium corrosion inhibitor includes at least one of imidazoline magnesium corrosion inhibitors, sodium carboxylate magnesium corrosion inhibitors, and acetylenide diol magnesium corrosion inhibitors.

[0030] According to some embodiments of the present invention, the defoamer includes at least one of silicone defoamer, polyether defoamer and mineral oil defoamer.

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

[0032] Nonionic surfactant A: 7-7.5 parts;

[0033] Nonionic surfactant B, 5.5–6 parts;

[0034] The dispersing co-solvent is 0.2 to 3 parts; specifically, it can be about 0.5 parts, 1 part, 1.5 parts, 2 parts, or about 2.5 parts.

[0035] The penetrant is 0.8 to 1.5 parts; specifically, it can be about 1.0 part or about 1.2 parts.

[0036] Chelating agent 3 to 6 parts; specifically, it can be about 4 parts or about 5 parts;

[0037] Corrosion inhibitor 0.2 to 2 parts; specifically, it can be about 0.5 parts, 1.0 part, or about 1.5 parts;

[0038] Defoamer 0.01 to 0.05 parts; for example, it can be about 0.02 parts, 0.03 parts, or about 0.04 parts;

[0039] The deionized water volume is 67.35 to 82.99 parts. For example, it can be approximately 68, 70, 72, 74, 76, 78, 80, or approximately 82 parts.

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

[0041] Nonionic surfactant A: 9-12 parts;

[0042]

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

[0044]

[0045] According to an embodiment of a second aspect of the present invention, a method for preparing the aluminum alloy cleaning agent described in the first aspect of the present invention is provided, the method comprising mixing the 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 in the above embodiments, it has at least all the beneficial effects brought about by the technical solutions in the above embodiments.

[0047] According to some embodiments of the present invention, the mixing of the raw materials is carried out by adding all the 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 addition of the raw materials are not limited. Specifically, the order of addition will not affect the cleaning performance of the final aluminum alloy cleaning agent.

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

[0050] S1. Heat the deionized water and start stirring;

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

[0052] By adjusting the order in which the raw materials are added, the uniformity of the mixing and dispersion of 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, it can be about 50°C.

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

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

[0056] According to some embodiments of the present invention, in step S2, the stirring speed is the same as that in step S1. In actual production, this means keeping the stirring speed constant, but due to changes in the system viscosity, the stirring 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, it can be about 40 minutes or about 50 minutes.

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

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

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

[0061] According to some embodiments of the present invention, the aluminum alloy includes six-series aluminum alloys. Different series of aluminum alloys have different hardness and corrosion resistance, resulting in varying degrees of contaminant adhesion. For softer aluminum alloys, contaminants may even penetrate into the material, making cleaning more difficult. Furthermore, different types of aluminum alloys have different alloying elements, leading to variations in the corrosion resistance of aluminum alloy cleaning agents. Therefore, the cleaning effect of the same aluminum alloy cleaning agent will differ when cleaning different types of aluminum alloys. The aluminum alloy cleaning agent provided by this invention is applicable to multiple series of aluminum alloys, but it is most effective for 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 suitable for various cleaning methods, has a wide range of applications, and offers flexible and diverse usage methods.

[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 polishing paste stains.

[0064] According to some embodiments of the present invention, the cleaning targets abrasive paste stains. Abrasive paste stains are significantly different 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 abrasive paste stains from aluminum alloys is unpredictable.

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

[0066] Unless otherwise specified, "between" in this 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 invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Detailed Implementation

[0068] The following will describe the concept and technical effects of the present invention clearly and completely with reference to embodiments, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention.

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

[0070] Example 1

[0071] This example provides an aluminum alloy cleaning agent and its preparation method, 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. First, add deionized water to the mixing vessel, then heat to 50°C, turn on the stirring and set the speed to 50 rpm;

[0076] S2. Add the composite surfactant (including nonionic surfactant A and nonionic surfactant B), dispersant, penetrant, chelating agent, corrosion inhibitor and defoamer sequentially to the deionized water in step S1; stir for 60 minutes and mix evenly.

[0077] Example 2

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

[0079] (1) The raw materials used in the preparation have different compositions, 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 its preparation method, which differs from Example 1 in that:

[0084] (1) The raw materials used in the preparation have different compositions, 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, nonionic surfactant A is NP-10, and the amount added is 13 parts. 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] Replace the dispersing co-solvent 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 were added.

[0103] Comparative Example 6

[0104] This example demonstrates the preparation of the six-series aluminum alloy cleaning agent as described in Chinese patent document CN113512728A. The specific formula is as follows:

[0105] Comparative Example 7

[0106] This example demonstrates the preparation of the six-series aluminum alloy cleaning agent described in Chinese patent document CN110923727A. The specific formula is as follows:

[0107]

[0108]

[0109] Comparative Example 8

[0110] This example refers to Example 1 of patent document CN111154563A, which provides an aluminum alloy cleaning agent with the following specific formula:

[0111] Comparative Example 9

[0112] This example refers to Example 1 of patent document CN115595598A, which provides an aluminum alloy cleaning agent with the following specific formula:

[0113] Comparative Example 10

[0114] This example refers to Example 1 of patent document CN109234052A, which provides an aluminum alloy cleaning agent with the following specific formula:

[0115]

[0116] Detection example

[0117] This example tested the physicochemical characteristics and cleaning effect of the aluminum alloy cleaning agents obtained in the examples and comparative examples. The physicochemical characteristics included visual inspection, specific gravity testing (conducted according to ASTM D891), and pH testing. The cleaning effect was tested according to the detergency test method in GB / T 35759-2017 Metal Cleaning Agents, using 120nm silica sol polishing paste (FMC830-P, Ishihara Sangyo Co., Ltd., Japan) instead of artificial oil stains in the standard. The test specimens used were aluminum alloy 6063 specimens, and the temperature was controlled at 50±2℃. Visual observation was conducted to check for discoloration of the specimen surface after cleaning, and the detergency was calculated. Specific data results are shown in Table 1.

[0118] Table 1. Performance test results of the aluminum alloy cleaning agents obtained in the examples and comparative examples.

[0119]

[0120]

[0121] As shown in Table 1, Examples 1-3 exhibit superior cleaning ability and corrosion resistance compared to other comparative examples for six-series aluminum alloys. This is because the synergistic effect of the surfactant and various additives is optimal within this range, resulting in the best cleaning effect on polishing paste and the strongest protection for the aluminum alloy. Outside this range, the system's cleaning ability for polishing paste weakens, potentially leading to loss of shine and darkening of the aluminum alloy. Furthermore, while other related technologies may provide aluminum alloy cleaning agents with strong cleaning capabilities for contaminants such as cutting fluid and oil, their cleaning effect on polishing paste is not ideal. Due to these advantages, the aluminum alloy cleaning agent provided by this invention is expected to achieve widespread application in cleaning surface stains (especially polishing paste stains) on aluminum alloys (especially six-series aluminum alloys).

[0122] The embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. An aluminum alloy cleaning agent, characterized in that, The raw materials for preparing the aluminum alloy cleaning agent, by weight, are: 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, defoamer: 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 includes dehydrated sorbitan fatty acid ester; The dispersing co-solvent includes at least one of ethylene glycol, glycerol, diethylene glycol, and sorbitol; The corrosion inhibitor includes at least one of aluminum corrosion inhibitor and magnesium corrosion inhibitor; The aluminum corrosion inhibitor includes at least one of siloxane ketone aluminum corrosion inhibitors, silicate aluminum corrosion inhibitors, and organic acid aluminum corrosion inhibitors; The magnesium corrosion inhibitor includes at least one of imidazoline magnesium corrosion inhibitors, sodium carboxylate magnesium corrosion inhibitors, and acetylenide diol magnesium corrosion inhibitors.

2. The aluminum alloy cleaning agent according to claim 1, characterized in that, In a single molecule of the aforementioned fatty alcohol polyoxyethylene ether, the number of carbon atoms 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 aforementioned dehydrated sorbitan fatty acid ester is 22 to 24.

4. The aluminum alloy cleaning agent according to any one of claims 1 to 3, 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 ethylenediaminetetraacetic acid tetrasodium salt, sodium gluconate, sodium hypotriacetate, and sodium citrate.

5. The aluminum alloy cleaning agent according to any one of claims 1 to 3, characterized in that, The defoamer includes at least one of silicone defoamers, polyether defoamers, and mineral oil defoamers.

6. A method for preparing an aluminum alloy cleaning agent as described in any one of claims 1 to 5, characterized in that, The preparation method includes mixing the raw materials for preparing the aluminum alloy cleaning agent.

7. The application of an aluminum alloy cleaning agent as described in any one of claims 1 to 5 in cleaning aluminum alloys.

8. The application according to claim 7, characterized in that, The aluminum alloys include six-series aluminum alloys.

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