Cleaning agent for non-corrosive aluminum material, cleaning method and application thereof

Abstract

The present application relates to a kind of non-corrosive aluminum material cleaning agent and cleaning method and application, belong to metal material cleaning technical field.The present application provides a kind of composition, including the following weight parts of component: organic base 10~30 parts, aluminum corrosion inhibitor 3~10 parts, penetration accelerator 0.1~0.5 parts and chelate stabilizer 0.8~1.5 parts.The present application provides a kind of formula simplification, excellent aluminum material stamping part special cleaning agent and its matched cleaning method and system and effect.The present application is balanced by the synergistic effect of specific organic base and corrosion inhibitor under specific ratio in the case of not relying on traditional inorganic strong base and surfactant, realizes high-efficiency decontamination and corrosion prevention.The present application has significant advantages in raw material management, production cost, batch stability and environmental friendliness by the formula of simplified cleaning agent.

Description

Technical Field

[0001] This invention relates to the field of metal material cleaning technology, and in particular to a non-corrosive aluminum cleaning agent, cleaning method and application. Background Technology

[0002] Precision stamped parts made of aluminum and aluminum alloys (such as consumer electronics housings, automotive structural parts, and heat sinks) utilize large amounts of stamping oil and drawing oil as lubricating and cooling media during the forming process. These oils are complex in composition (typically containing mineral oil, esters, extreme pressure additives, rust inhibitors, etc.) and are tightly bonded to the aluminum substrate. Thoroughly removing these oils is a crucial prerequisite for ensuring the quality (such as adhesion, appearance, and corrosion resistance) of subsequent surface treatment processes such as anodizing, spraying, welding, electroplating, or bonding.

[0003] Currently, aluminum cleaning agents mainly revolve around balancing the core contradiction between efficient decontamination and corrosion prevention of the substrate. To achieve this goal, mainstream commercial cleaning agents and technical solutions on the market generally follow a complex formulation design approach that combines multiple functional components, each performing a specific function in the hope of achieving a synergistic effect. A typical industrial-grade aluminum cleaning agent usually contains the following types of substances: (1) Inorganic alkali (such as NaOH, KOH, sodium carbonate), which serves as the main cleaning agent, providing a strongly alkaline environment and decomposing grease through saponification reaction; (2) Organic alkali / organic alcohol amine (such as triethanolamine, diethanolamine), which serves as an auxiliary cleaning agent and pH adjuster, providing a milder alkalinity and having certain emulsification, penetration and complexing capabilities; (3) Various surfactants (nonionic, anionic, etc.), such as fatty alcohol polyoxyethylene ether (AEO series) and alkyl glycoside (APG), whose core function is to reduce surface tension, emulsify non-saponifiable oil stains and prevent dirt redeposition; (4) Special corrosion inhibitors (such as silicates, molybdates, benzotriazoles): inhibiting the corrosion of active aluminum materials by alkaline or acidic media; (5) Cosolvents and chelating agents (such as ethylene glycol butyl ether, sodium EDTA), which help dissolve organic dirt, chelate hard water ions and metal ions, and improve cleaning stability and rinsing properties; (6) Water, as a solvent. The drawbacks of such complex formulations are becoming increasingly apparent: a wide variety of raw materials, complex supply chain management, and high overall costs; some components (such as certain surfactants and phosphorus-containing chelating agents) have poor biodegradability, posing significant environmental challenges; more importantly, the compatibility and stability among multiple components present significant challenges, and in actual production, fluctuations in parameters (such as temperature and concentration) can easily lead to an imbalance between cleaning and corrosion prevention effects, or leave residues that are difficult to rinse, affecting the quality of the final product. Therefore, there is a technical need in this field for aluminum cleaning agents that are simplified in formulation, have superior performance, and are environmentally friendly. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies, such as complex formulations, high costs, potential chemical residues, and cumbersome adjustments for adaptability to different working conditions, which rely on the compounding of multiple functional components. This invention provides a non-corrosive aluminum cleaning agent, cleaning method, and application.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: In a first aspect, the present invention provides a composition comprising the following components in parts by weight: 10-30 parts of organic base, 3-10 parts of aluminum corrosion inhibitor, 0.1-0.5 parts of penetration enhancer, and 0.8-1.5 parts of chelation stabilizer; The organic base includes at least one of hydroxyethyl ethylenediamine, tetramethylammonium hydroxide, cocoamine polyoxyethylene ether, and isopropanolamine; The corrosion inhibitor includes at least one of sodium polyphosphate, sodium metasilicate, 5-mercapto-1-phenyl-tetrazazole, and 2-mercaptobenzimidazole; The penetration enhancer includes at least one of 2,4,7,9-tetramethyl-5-decyn-4,7-diol, 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, decyl glucoside, and polyether-modified trisiloxane. The chelating stabilizer includes at least one of polyepoxysuccinic acid, hydrolyzed polymaleic anhydride, trisodium methylglycine diacetate, and diethylenetriaminepentamethylphosphonic acid.

[0006] This invention combines a specific organic base with an aluminum corrosion inhibitor to form a minimally shaped binary system with chelation-film formation as its core mechanism. This system achieves highly efficient decontamination and corrosion prevention while reducing the types and amounts of other essential components, enhancing the inherent synergy and stability of the formulation, and reducing reliance on traditional surfactants and specialized organic corrosion inhibitors. In addition to the organic base and aluminum corrosion inhibitor as core components, this invention also adds other functional synergists to flexibly address complex structures or harsh water conditions, achieving simplified formulation, optimized cost, improved environmental friendliness, and enhanced process adaptability while ensuring excellent overall performance.

[0007] Meanwhile, the organic alkali used in this invention is not only an alkali source, but its strong chelating ability can stabilize the aluminum substrate interface, achieving deep cleaning and primary corrosion protection; the corrosion inhibitor used in this invention not only has a corrosion inhibition effect, but the alkalinity it provides and the aluminum silicate film it forms also promote the chelating effect of the organic alkali, working together to perform basic cleaning and corrosion protection functions.

[0008] For example, the hydroxyethyl ethylenediamine used in this invention contains two amino groups and one hydroxyl group in its molecule, exhibiting a very strong chelating ability for aluminum ions. In the initial stage of cleaning, aluminum may slightly dissolve in an alkaline environment, generating Al... 3+ Hydroxyethyl ethylenediamine and Al 3+This forms a stable, soluble complex. On the one hand, it thermodynamically inhibits further aluminum dissolution, providing the first layer of chemical corrosion protection; on the other hand, it reduces free Al at the film / liquid interface. 3+ By stabilizing the aluminum ion concentration at the interface, the problem of Al being affected is avoided. 3+ Excessive local concentration leads to a loose and porous protective film, creating a uniform and controllable chemical environment for the growth of the protective film.

[0009] For example, the sodium metasilicate used in this invention can provide OH through hydrolysis. - This helps maintain the pH level required for cleaning. The silicate ions produced by hydrolysis migrate to the aluminum surface and react with the aluminum atoms or alumina layer to form an amorphous, dense protective film of aluminum silicate. This film physically isolates the cleaning solution from the aluminum substrate, providing a second physical barrier against corrosion.

[0010] Furthermore, the penetration promoter used in this invention can reduce the dynamic surface tension of the working fluid, enabling it to quickly wet the aluminum surface and penetrate into the micropores and oil film, thereby fully leveraging the cleaning and anti-corrosion effects of the organic alkali and aluminum corrosion inhibitor, resulting in thorough cleaning of complex structural components. The chelating stabilizer used in this invention can selectively chelate hardness and impurity metal ions such as calcium, magnesium, and iron in the water, preventing these ions from consuming the core aluminum corrosion inhibitor, interfering with the formation of the aluminum silicate protective film, or generating insoluble deposits, thus ensuring the stability and reproducibility of the core synergistic mechanism under different water quality and environmental conditions.

[0011] When cleaning, water can be used as a solvent and mass transfer medium to dilute the cleaning agent as a working solution to achieve effective cleaning at an appropriate concentration.

[0012] Secondly, the present invention provides the use of the composition in the preparation of cleaning agents.

[0013] Furthermore, the cleaning agent is used for cleaning metal materials.

[0014] Furthermore, the metallic material includes aluminum or aluminum alloy.

[0015] Thirdly, the present invention provides a cleaning agent containing the aforementioned composition.

[0016] Furthermore, the cleaning agent also contains 58 to 86.1 parts of water.

[0017] Fourthly, the present invention provides a method for cleaning aluminum or aluminum alloy materials, wherein the cleaning agent is used for cleaning.

[0018] Furthermore, the cleaning agent is diluted and used as a working solution for ultrasonic cleaning of aluminum or aluminum alloy materials, followed by water rinsing.

[0019] Furthermore, the mass concentration of the cleaning agent in the working fluid should preferably be 4% to 20%, for example, including but not limited to any point value or any range of two points such as 4%, 6%, 8%, 10%, 12%, 14%, 16%, 18%, and 20%.

[0020] Furthermore, the ultrasonic cleaning temperature is preferably 50~70℃, including but not limited to any point value or any two points within the range of 50℃, 52℃, 54℃, 56℃, 58℃, 60℃, 62℃, 64℃, 66℃, 68℃ and 70℃; the ultrasonic cleaning time is preferably 4~12 min, including but not limited to any point value or any two points within the range of 4 min, 6 min, 8 min, 10 min and 12 min; the water rinsing time is preferably 10~30 s, including but not limited to any point value or any two points within the range of 10 s, 12 s, 14 s, 16 s, 18 s, 20 s, 22 s, 24 s, 26 s, 28 s and 30 s.

[0021] Furthermore, the ultrasonic cleaning is performed 1 to 3 times, and the water rinsing is performed 1 to 3 times.

[0022] Fifthly, the present invention provides a cleaning system comprising a multi-tank ultrasonic cleaning zone and a multi-channel overflow water washing zone connected in series. The multi-tank ultrasonic cleaning zone contains three ultrasonic cleaning tanks connected in series, each containing the cleaning agent. Each ultrasonic cleaning tank is connected to a heating device, a temperature controller, an ultrasonic generator and transducer, and a circulating filter pump. The multi-channel overflow water washing zone contains three overflow water washing tanks connected in series, each containing water.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention provides a simplified and highly effective cleaning agent for aluminum stamping parts, along with its corresponding cleaning method and system. Through the synergistic effect of a specific organic alkali and corrosion inhibitor in a specific ratio, this invention achieves a balance between efficient decontamination and corrosion prevention without relying on traditional inorganic strong alkalis and surfactants. The simplified cleaning agent formulation of this invention offers significant advantages in raw material management, production costs, batch stability, and environmental friendliness. Attached Figure Description

[0024] Figure 1 The image shows a dyne pen test result of cleaning an aluminum plate with the cleaning agent from Example 1. The left side shows the untreated plate, and the right side shows the plate after cleaning. Detailed Implementation

[0025] To better illustrate the purpose, technical solution, and advantages of this invention, the invention will be further described below with reference to specific embodiments. Unless otherwise specified, other materials and reagents used in the embodiments are commercially available.

[0026] Example 1 (E1) Cleaning agent formulation: 22% hydroxyethyl ethylenediamine, 8% sodium metasilicate pentahydrate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0027] Example 2 (E2) The difference from Example 1 is that the concentration of hydroxyethyl ethylenediamine is 10%.

[0028] Cleaning agent formula: 10% hydroxyethyl ethylenediamine, 8% sodium metasilicate pentahydrate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0029] Example 3 (E3) The difference from Example 1 is that the concentration of hydroxyethyl ethylenediamine is 30%.

[0030] Cleaning agent formula: 30% hydroxyethyl ethylenediamine, 8% sodium metasilicate pentahydrate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0031] Example 4 (E4) The difference from Example 1 is that the concentration of sodium metasilicate pentahydrate is 3%.

[0032] Cleaning agent formula: 22% hydroxyethyl ethylenediamine, 3% sodium metasilicate pentahydrate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0033] Example 5 (E5) The difference from Example 1 is that the concentration of sodium metasilicate pentahydrate is 10%.

[0034] Cleaning agent formulation: 22% hydroxyethyl ethylenediamine, 10% sodium metasilicate pentahydrate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0035] Example 6 (E6) The difference from Example 1 is that the concentration of 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate is 0.1%.

[0036] Cleaning agent formula: 22% hydroxyethyl ethylenediamine, 8% sodium metasilicate pentahydrate, 0.1% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0037] Example 7 (E7) The difference from Example 1 is that the concentration of 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate is 0.5%.

[0038] Cleaning agent formula: 22% hydroxyethyl ethylenediamine, 8% sodium metasilicate pentahydrate, 0.5% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0039] Example 8 (E8) The difference from Example 1 is that 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate was replaced with decyl glucoside.

[0040] Cleaning agent formula: 22% hydroxyethyl ethylenediamine, 8% sodium metasilicate pentahydrate, 0.2% decyl glucoside, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0041] Example 9 (E9) The difference from Example 1 is that 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate is replaced with 2,4,7,9-tetramethyl-5-decyn-4,7-diol.

[0042] Cleaning agent formula: 22% hydroxyethyl ethylenediamine, 8% sodium metasilicate pentahydrate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0043] Example 10 (E10) The difference from Example 1 is that the concentration of trisodium methylglycine diacetate is 0.8%.

[0044] Cleaning agent formula: 22% hydroxyethyl ethylenediamine, 8% sodium metasilicate pentahydrate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 0.8% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0045] Example 11 (E11) The difference from Example 1 is that the concentration of trisodium methylglycine diacetate is 1.5%.

[0046] Cleaning agent formula: 22% hydroxyethyl ethylenediamine, 8% sodium metasilicate pentahydrate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.5% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0047] Example 12 (E12) The difference from Example 1 is that trisodium methylglycine diacetate is replaced with polyepoxysuccinic acid.

[0048] Cleaning agent formulation: 22% hydroxyethyl ethylenediamine, 8% sodium metasilicate pentahydrate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% polyepoxysuccinic acid, and deionized water to make up the balance. The above are mass concentrations.

[0049] Example 13 (E13) The difference from Example 1 is that hydroxyethyl ethylenediamine was replaced with a 25% (w / w) aqueous solution of tetramethylammonium hydroxide, so that the final concentration of the component was 28% (to make the pH and corrosivity level of the final cleaning solution comparable to that of Example 1, thereby comparing the cleaning effects and synergistic effects of the two organic bases in a relatively fair corrosive environment).

[0050] Cleaning agent formula: 28% tetramethylammonium hydroxide (25% aqueous solution), 8% sodium metasilicate pentahydrate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0051] Example 14 (E14) The difference from Example 1 is that hydroxyethyl ethylenediamine is replaced with cocoamine polyoxyethylene ether.

[0052] Cleaning agent formula: 22% cocoamine polyoxyethylene ether, 8% sodium metasilicate pentahydrate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0053] Example 15 (E15) The difference from Example 1 is that hydroxyethyl ethylenediamine is replaced with isopropanolamine.

[0054] Cleaning agent formula: 22% isopropanolamine, 8% sodium metasilicate pentahydrate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0055] Example 16 (E16) The difference from Example 1 is that sodium metasilicate pentahydrate is replaced with sodium tripolyphosphate, so that the final concentration of this component is 6% (if the concentration is too high, it will cause a large deviation in alkalinity, ionic strength and chelating ability, and may interfere with the formation of protective film due to over-chelation).

[0056] Cleaning agent formulation: 22% hydroxyethyl ethylenediamine, 6% sodium tripolyphosphate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0057] Example 17 (E17) The difference from Example 1 is that sodium metasilicate pentahydrate is replaced with 5-mercapto-1-phenyl-tetrazazole.

[0058] Cleaning agent formulation: 22% hydroxyethyl ethylenediamine, 8% 5-mercapto-1-phenyl-tetrazazole, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0059] Example 18 (E18) The difference from Example 1 is that sodium metasilicate pentahydrate is replaced with 2-mercaptobenzimidazole.

[0060] Cleaning agent formulation: 22% hydroxyethyl ethylenediamine, 8% 2-mercaptobenzimidazole, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0061] Example 19 (E19) The difference from Example 1 is that trisodium methylglycine diacetate is replaced with hydrolyzed polymaleic anhydride.

[0062] Cleaning agent formulation: 22% hydroxyethyl ethylenediamine, 8% sodium metasilicate pentahydrate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% hydrolyzed polymaleic anhydride, and deionized water to make up the balance. The above are mass concentrations.

[0063] Example 20 (E20) The difference from Example 1 is that trisodium methylglycine diacetate is replaced with diethylenetriaminepentamethylphosphonic acid.

[0064] Cleaning agent formulation: 22% hydroxyethyl ethylenediamine, 8% sodium metasilicate pentahydrate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% diethylenetriamine pentamethylphosphonic acid, and deionized water to make up the balance. The above are mass concentrations.

[0065] Example 21 (E21) The difference from Example 1 is that 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate was replaced with polyether-modified trisiloxane, with a final concentration of 0.2%.

[0066] Cleaning agent formula: 22% hydroxyethyl ethylenediamine, 8% sodium metasilicate pentahydrate, 0.2% polyether-modified trisiloxane, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0067] Comparative Example 1 (C1) The difference from Example 1 is that hydroxyethyl ethylenediamine was replaced with sodium hydroxide, so that the final concentration of this component was 5%.

[0068] Cleaning agent formula: 5% sodium hydroxide (to provide equivalent alkalinity), 8% sodium metasilicate pentahydrate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0069] Comparative Example 2 (C2) The difference from Example 1 is that it does not contain sodium metasilicate pentahydrate.

[0070] Cleaning agent formulation: 22% hydroxyethyl ethylenediamine, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0071] Comparative Example 3 (C3) The difference from Example 1 is that it does not contain 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate and trisodium methylglycine diacetate.

[0072] Cleaning agent formula: 22% hydroxyethyl ethylenediamine, 8% sodium metasilicate pentahydrate, and deionized water to make up the balance. The above are mass concentrations.

[0073] Comparative Example 4 (C4) The difference from Example 1 is that it does not contain trisodium methylglycine diacetate.

[0074] Cleaning agent formula: 22% hydroxyethyl ethylenediamine, 8% sodium metasilicate pentahydrate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, and deionized water to make up the balance. The above are mass concentrations.

[0075] Comparative Example 5 (C5) The difference from Example 1 is that hydroxyethyl ethylenediamine is replaced with sodium hydroxide, resulting in a final concentration of 3%; sodium metasilicate pentahydrate is replaced with sodium metasilicate nonahydrate, resulting in a final concentration of 15%; 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate is replaced with octylphenol polyoxyethylene ether (OP-10), resulting in a final concentration of 2%; and trisodium methylglycine diacetate is not present.

[0076] Cleaning agent formula: 3% sodium hydroxide, 15% sodium metasilicate nonahydrate, 2% octylphenol polyoxyethylene ether (OP-10), and deionized water to make up the balance. The above are mass concentrations.

[0077] Comparative Example 6 (C6) The difference from Example 1 is that hydroxyethyl ethylenediamine is replaced with triethanolamine.

[0078] Cleaning agent formula: 22% triethanolamine, 8% sodium metasilicate pentahydrate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0079] Comparative Example 7 (C7) The difference from Example 1 is that sodium metasilicate pentahydrate is replaced with sodium molybdate.

[0080] Cleaning agent formulation: 22% hydroxyethyl ethylenediamine, 8% sodium molybdate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0081] Comparative Example 8 (C8) The difference from Example 1 is that sodium metasilicate pentahydrate is replaced with benzotriazole (BTA).

[0082] Cleaning agent formulation: 22% hydroxyethyl ethylenediamine, 8% benzotriazole (BTA), 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0083] Comparative Example 9 (C9) The difference from Example 1 is that 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate was replaced with OP-10.

[0084] Cleaning agent formula: 22% hydroxyethyl ethylenediamine, 8% sodium metasilicate pentahydrate, 0.2% OP-10, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0085] Comparative Example 10 (C10) The difference from Example 1 is that trisodium methylglycine diacetate is replaced with hydroxyethylidene diphosphonic acid (HEDP).

[0086] Cleaning agent formulation: 22% hydroxyethyl ethylenediamine, 8% sodium metasilicate pentahydrate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% hydroxyethylidene diphosphonic acid (HEDP), and deionized water to make up the balance. The above are mass concentrations.

[0087] Comparative Example 11 (C11) The difference from Example 1 is that the trisodium methylglycine diacetate is replaced with disodium ethylenediaminetetraacetate (EDTA-2Na).

[0088] Cleaning agent formulation: 22% hydroxyethyl ethylenediamine, 8% sodium metasilicate pentahydrate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% disodium ethylenediaminetetraacetate (EDTA-2Na), and deionized water to make up the balance. The above are mass concentrations.

[0089] Comparative Example 12 (C12) The difference from Example 1 is that 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate was replaced with sodium dioctyl sulfosuccinate.

[0090] Cleaning agent formula: 22% hydroxyethyl ethylenediamine, 8% sodium metasilicate pentahydrate, 0.2% sodium dioctyl sulfosuccinate, 1.0% trisodium methylglycine diacetate, and deionized water to make up the balance. The above are mass concentrations.

[0091] Comparative Example 13 (C13) The difference from Example 1 is that trisodium methylglycine diacetate is replaced with citric acid.

[0092] Cleaning agent formula: 22% hydroxyethyl ethylenediamine, 8% sodium metasilicate pentahydrate, 0.2% 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, 1.0% citric acid, and deionized water to make up the balance. The above are mass concentrations.

[0093] Example of effect 1. Cleaning method Test sample: 6063 aluminum alloy standard test piece (50mm×100mm×1mm), after cleaning and drying, with a uniform surface coating of 0.5 g / m². 2 Standard stamping oil.

[0094] Preparation of working solution: The cleaning agents of Examples 1-21 and Comparative Examples 1-13 were diluted to a 12% (w / w) aqueous solution as the working solution.

[0095] Cleaning simulation: The test sample was completely immersed in 200 mL of working solution and placed in a 60℃ constant temperature water bath for ultrasonic cleaning for 12 min.

[0096] Post-processing: After ultrasonic cleaning, the test sample was removed and immediately immersed in still deionized water for rinsing twice for a total of 30 seconds. Then, it was dried with cold air to obtain the cleaned and dried test sample.

[0097] 2. Detection Method (1) Oil residue rate test Method: Gravimetric method.

[0098] After cleaning and drying the 6063 aluminum alloy standard test piece with deionized water, the initial aluminum test piece was obtained, weighed, and its mass was recorded as m0. A 5g / m coating was then uniformly applied to the surface of the initial aluminum test piece. 2 Standard stamping oil was used to obtain an oiled aluminum test piece, which was weighed and its mass was recorded as m1. The oiled aluminum test piece was then ultrasonically cleaned with cleaning solution according to the cleaning method in step 1, dried, and weighed, with its mass recorded as m2.

[0099] Calculate the oil residue rate: Oil residue rate (%) = [(m2- m0) / (m1- m0)]×100% (Equation I).

[0100] (2) Test method for No. 38 dyne pen This test method is used to quickly assess the surface cleanliness of aluminum materials after cleaning.

[0101] Using a test pen calibrated to a surface tension of 38 mN / m, a mark of approximately 1–2 cm is made on the surface of an initial aluminum sample. If the mark remains as a continuous, uniform liquid film within 2 seconds, it is considered a "pass," indicating high surface energy (≥38 mN / m) and no contaminant residue. If the liquid film rapidly shrinks, breaks, or forms droplets, it is considered a "fail," indicating low surface energy and the presence of oil or residue. The test must be conducted at room temperature in a windless environment, and the mark must be wiped away promptly. This method serves as a rapid semi-quantitative criterion for the cleanliness of the cleaning agents in the embodiments and comparative examples of this invention.

[0102] (3) Corrosion weight loss test (limiting conditions) Method: Immersion weight loss method.

[0103] Weigh the initial aluminum sample and record its mass as W1. Measure its surface area and record it as S. Immerse the initial aluminum sample in the cleaning solution to be tested at 60℃ for 1 hour. Remove it and soak it in a phosphoric acid-chromic acid solution (80℃) for 10 minutes to remove corrosion products. Remove the aluminum sheet, clean it, dry it, and weigh it, recording its mass as W2.

[0104] Calculate corrosion weight loss: Corrosion weight loss (g / m³) 2 =[(W1- W2) / S] × 10000 (Equation II).

[0105] (4) Polarization resistance test Method: Linear polarization method (electrochemistry).

[0106] Place the aluminum electrode (exposed 1 cm) 2 Immerse the sample in the cleaning solution at 60℃. After the open circuit potential stabilizes, perform a potential scan of ±10 mV near the self-corrosion potential (rate 0.166 mV / s).

[0107] The polarization resistance Rp (unit: kΩ·cm) is derived from the slope of the potential-current curve near zero. 2 ).

[0108] Significance: The larger the Rp value, the smaller the corrosion current and the better the corrosion resistance.

[0109] Figure 1 The results of cleaning the same aluminum plate with the cleaning agent of Example 1 are shown. It can be seen that after cleaning with the cleaning agent of Example 1, the No. 38 dyne pen formed a film, and no obvious corrosion appeared on the surface of the aluminum plate.

[0110] All test results are shown in Table 1. It can be seen that the oil residue rate in Examples 1-21 is less than 0.5%, the dyne pen test result is passed, and the corrosion weight loss value is low, at 0.01 g / m³. 2 Around 75 kΩ·cm, with relatively high polarization resistance. 2 That's all. In Example 2, due to a slightly higher concentration of hydroxyethyl ethylenediamine, the oil residue rate and dyne pen test results were worse, but the corrosion resistance was good.

[0111] In Comparative Example 1, after using inorganic alkali sodium hydroxide, the oil residue rate increased, the dyne pen test results failed, the corrosion weight loss value increased, and the polarization resistance decreased.

[0112] After removing some components from Comparative Examples 2-4, they could not perform well in terms of detergency and had poor corrosion resistance.

[0113] Comparative Examples 6-13, after replacing the types of components of the present invention, failed to achieve good detergency and exhibited poor corrosion resistance.

[0114] Table 1 Example 22 Based on the test results of the embodiments and comparative examples, the cleaning method was further optimized.

[0115] The aluminum plate to be cleaned is placed in a multi-stage ultrasonic overflow cleaning system. This system consists of multiple ultrasonic cleaning tanks and multiple overflow water rinsing zones connected in series. The multi-tank ultrasonic cleaning zone contains three ultrasonic cleaning tanks connected in series: the first, second, and third ultrasonic cleaning tanks. Each tank contains a cleaning agent working solution of the same concentration and is connected to a heating device, temperature controller, ultrasonic generator and transducer, and a circulating filter pump. The working solution is kept clean and of uniform concentration by the circulating filter pump. The multiple overflow water rinsing zone contains three overflow water rinsing tanks connected in series: the first, second, and third overflow water rinsing tanks. Fresh deionized water is continuously injected into each overflow water rinsing tank, maintaining an overflow state to ensure the water quality within the tank remains consistently clean.

[0116] In operation, the aluminum workpiece to be cleaned is placed in the first ultrasonic cleaning tank of the multi-tank ultrasonic cleaning zone containing the cleaning agent working solution. The temperature of the cleaning agent working solution in the first ultrasonic cleaning tank is maintained at 60°C using a heating device and temperature controller. The ultrasonic generator and transducer are activated, and the aluminum workpiece is ultrasonically immersed and cleaned for 4 minutes to obtain a first ultrasonically cleaned aluminum workpiece. The aluminum workpiece that has undergone first ultrasonic cleaning is then placed in the second ultrasonic cleaning tank. The temperature of the cleaning agent working solution in the second ultrasonic cleaning tank is maintained at 60°C using a heating device and temperature controller. The ultrasonic generator and transducer are activated, and the aluminum workpiece is ultrasonically immersed and cleaned for 4 minutes to obtain a second ultrasonically cleaned aluminum workpiece. The aluminum workpiece that has undergone second ultrasonic cleaning is then placed in the third ultrasonic cleaning tank. The temperature of the cleaning agent working solution in the third ultrasonic cleaning tank is maintained at 60°C using a heating device and temperature controller. The ultrasonic generator and transducer are activated, and the aluminum workpiece is ultrasonically immersed and cleaned for 4 minutes to obtain a third ultrasonically cleaned aluminum workpiece.

[0117] The aluminum workpiece, which has undergone three ultrasonic cleaning processes, is placed in the first overflow water washing tank of a multi-stage overflow water washing zone filled with fresh deionized water and kept in an overflow state. It is then rinsed at room temperature for 10 seconds to obtain the first rinsed aluminum workpiece. The first rinsed aluminum workpiece is then placed in the second overflow water washing tank and rinsed at room temperature for 10 seconds to obtain the second rinsed aluminum workpiece. The second rinsed aluminum workpiece is then placed in the third overflow water washing tank and rinsed at room temperature for 10 seconds to complete the cleaning of the aluminum workpiece.

[0118] In the multi-tank ultrasonic cleaning zone, the first ultrasonic cleaning tank contacts the most heavily contaminated aluminum workpieces, with the highest concentration of contaminants. After pre-cleaning in the first ultrasonic cleaning tank, the aluminum workpieces entering the second ultrasonic cleaning tank have significantly reduced surface contaminant concentration and contaminant load in the cleaning solution, allowing for deeper cleaning in a cleaner environment. The third ultrasonic cleaning tank performs the final fine cleaning and safeguarding. The high-pressure shock waves and micro-jets generated by ultrasonic cavitation effectively impact the oil stains on the workpiece surface and within micropores and blind holes, ensuring consistent cleaning of complex-structured aluminum workpieces.

[0119] The overflow design of the multi-stage overflow rinsing zone ensures that the rinsing tank is always in a flowing state, achieving dynamic displacement dilution of residual cleaning agent on the surface of aluminum workpieces, rather than static mixing and dilution. This achieves optimal rinsing results with minimal water consumption, thoroughly removing any trace amounts of silica film precursors or complexes that may remain, ensuring absolute cleanliness of the workpiece surface.

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A composition, characterized in that, It comprises the following components in parts by weight: 10-30 parts organic base, 3-10 parts aluminum corrosion inhibitor, 0.1-0.5 parts penetration enhancer, and 0.8-1.5 parts chelation stabilizer; The organic base includes at least one of hydroxyethyl ethylenediamine, tetramethylammonium hydroxide, cocoamine polyoxyethylene ether, and isopropanolamine; The corrosion inhibitor includes at least one of sodium polyphosphate, sodium metasilicate, 5-mercapto-1-phenyl-tetrazazole, and 2-mercaptobenzimidazole; The penetration enhancer includes at least one of 2,4,7,9-tetramethyl-5-decyn-4,7-diol, 2,4,7,9-tetramethyl-5-decyn-4,7-diol ethoxylate, decyl glucoside, and polyether-modified trisiloxane. The chelating stabilizer includes at least one of polyepoxysuccinic acid, hydrolyzed polymaleic anhydride, trisodium methylglycine diacetate, and diethylenetriaminepentamethylphosphonic acid.

2. The use of the composition according to claim 1 in the preparation of cleaning agents.

3. The application as described in claim 2, characterized in that, The cleaning agent is used for cleaning metal materials.

4. The application as described in claim 3, characterized in that, The metallic material includes aluminum or aluminum alloy.

5. A cleaning agent, characterized in that, The cleaning agent contains the composition of claim 1.

6. A method for cleaning aluminum or aluminum alloy materials, characterized in that, Cleaning is performed using the cleaning agent described in claim 5.

7. The method as described in claim 6, characterized in that, The cleaning agent described in claim 5 is diluted and used as a working solution for ultrasonic cleaning of aluminum or aluminum alloy materials, followed by water rinsing.

8. The method of claim 7, characterized in that, The ultrasonic cleaning temperature is 50~70℃, the ultrasonic cleaning time is 4~12min, and the water rinsing time is 10~30s.

9. The method as described in claim 7, characterized in that, The ultrasonic cleaning is performed 1 to 3 times, and the water rinsing is performed 1 to 3 times.

10. A cleaning system, characterized in that, The cleaning system includes a series-connected multi-tank ultrasonic cleaning zone and a series-connected overflow water washing zone. The multi-tank ultrasonic cleaning zone contains three series-connected ultrasonic cleaning tanks, each containing the cleaning agent as described in claim 5. Each ultrasonic cleaning tank is connected to a heating device, a temperature controller, an ultrasonic generator and transducer, and a circulating filter pump. The series-connected overflow water washing zone contains three series-connected overflow water washing tanks, each containing water.

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