Aluminum alloy saponification powder cleaning agent composition and preparation and use methods thereof

Abstract

The invention discloses an aluminum alloy saponification powder cleaning agent composition and a use method thereof, and the cleaning agent composition comprises the following raw materials by mass: 10-20% of a softening agent; 8-14% of a chelating agent; 5%-10% of a surfactant; 3-8% of a penetrant; 2-4% of a corrosion inhibitor; 1-3% of a solubilizer; 0.3%-0.8% of a defoaming agent; and the balance of deionized water. The saponification liquid is adopted as a processing medium for cleaning after stamping for an aluminum alloy base material, a compact saponification powder layer on the surface of the stamped aluminum alloy is well removed, the dyne value of the cleaned aluminum alloy surface can reach 38 # or above, additional corrosion damage to the base material is avoided, and the cleaning agent is simple in using process, safe, environmentally friendly and free of pollution. And the batch use yield exceeds 99%.

Description

Technical Field

[0001] This invention belongs to the field of industrial cleaning agents, and specifically relates to an aluminum alloy saponified powder cleaning agent composition and its preparation and application methods. Background Technology

[0002] The new energy vehicle industry is experiencing rapid development. As a key technological path to replace traditional fuel vehicles, its core characteristic is the replacement of internal combustion engine systems with electric drive systems. In high-end equipment manufacturing industries such as new energy vehicles, lightweighting is one of the core technological paths. Aluminum alloys, due to their excellent specific strength, thermal conductivity, and corrosion resistance, are widely used in key components such as battery pack housings, motor drive units, and body structural parts. In the manufacturing process of these components, stamping and drawing are the main forming processes, and this process frequently uses a processing medium—saponification liquid. Saponification liquid is an emulsion generated by the saponification reaction of fatty acids and alkalis. It is mainly used for lubrication, cooling, and oxidation prevention in aluminum alloy processing. Its core function is to reduce friction and heat during the stamping process by forming a stable emulsion system, while preventing workpiece oxidation. When this saponification liquid is applied to the surface of the aluminum alloy workpiece, the moisture evaporates instantly after stamping, and with the strong pressure, a dense and compact saponification powder layer is formed on the aluminum alloy surface. This saponification powder layer is also an important contaminant that needs to be removed during the processing of aluminum alloy parts.

[0003] If this layer of saponified powder is not thoroughly removed, it will severely affect the quality of subsequent welding, painting, and bonding processes, ultimately threatening the safety and reliability of the product. Currently, the industry commonly uses general-purpose metal cleaners or strong acid / alkali solutions to address this problem, but these methods have the following significant drawbacks:

[0004] 1. Poor cleaning effect: General cleaning agents are not designed for the chemical properties of saponified powder. They are often difficult to completely dissolve and remove this dense residue layer composed of fatty acid metal salts, resulting in substandard cleanliness and failure to pass the dyne value test (such as 38 dynes) in subsequent processes.

[0005] 2. Risk of substrate corrosion: Using strong acids, alkalis or irritating chemicals in pursuit of cleaning results can easily cause excessive corrosion, loss of gloss or discoloration (such as yellowing or blackening) of the reactive aluminum alloy substrate, leading to the scrapping of the workpiece.

[0006] 3. Environmental and safety issues: Some highly efficient but toxic or harmful solvents or phosphorus-containing cleaning agents are not environmentally friendly and run counter to the current trend of green manufacturing.

[0007] Therefore, there is an urgent need in this field to develop a novel cleaning agent that can efficiently and specifically break down and remove the saponified powder layer on the surface of aluminum alloys, while providing sufficient protection for the aluminum alloy substrate, ensuring zero corrosion and not affecting subsequent processes, and meeting the requirements of environmentally friendly and safe production. However, currently available technical information lacks a targeted solution that can perfectly solve the above problems simultaneously. Summary of the Invention

[0008] To address the aforementioned technical problems, the primary objective of this invention is to disclose an aluminum alloy saponified powder cleaning agent composition. This cleaning agent composition can efficiently and thoroughly remove the dense saponified powder layer on the surface of aluminum alloy stamping parts, while being non-corrosive to the aluminum alloy substrate, safe and environmentally friendly, and suitable for automated industrial production.

[0009] The technical solution adopted in this invention is as follows:

[0010] A cleaning agent composition for aluminum alloy saponification powder, comprising the following raw materials in weight percentages:

[0011] Softener: 10-20%;

[0012] Chelating agent: 8-14%;

[0013] Surfactant: 5-10%;

[0014] Penetrant: 3-8%;

[0015] Corrosion inhibitor: 2-4%;

[0016] Solubilizer: 1-3%;

[0017] Defoamer: 0.3–0.8%;

[0018] The remainder is deionized water.

[0019] Furthermore, the softening agent is at least one of sulfosalicylic acid and salicylic acid.

[0020] Furthermore, the chelating agent is at least one of maleic acid, fumaric acid, and maleic acid-acrylic acid copolymer.

[0021] Furthermore, the surfactant is at least one of glycerol polyoxyethylene ether polyoxypropylene ether and alkyl dimethylamine oxide.

[0022] Furthermore, the penetrant is sodium dioctyl sulfosuccinate.

[0023] Furthermore, the corrosion inhibitor is selected from any one of Lan-826, tannic acid, gallic acid, and ellagic acid.

[0024] Furthermore, the solubilizer is any one of glycine, leucine, L-lysine, and L-alanine.

[0025] Furthermore, the defoamer is selected as a polyether defoamer.

[0026] A method for preparing an aluminum alloy saponified powder cleaning agent composition includes the following steps: adding deionized water to a reaction vessel, and sequentially adding softener, chelating agent, surfactant, penetrant, corrosion inhibitor, solubilizer, and defoamer to the reaction vessel according to the mass percentage of each component, and stirring until each component is completely dissolved to obtain a concentrated solution of the cleaning agent composition.

[0027] A method for using an aluminum alloy saponifying powder cleaning agent composition includes the following steps:

[0028] (1) The cleaning agent concentrate is diluted with deionized water at a mass fraction of 10-20% and stirred evenly to obtain the cleaning working solution;

[0029] (2) Inject the prepared working fluid into the storage tank of the horizontal spray cleaning line, and use the heating system to control and maintain its temperature at 50-60℃.

[0030] (3) Use a fan-shaped nozzle to spray and clean each surface of the workpiece at a spray pressure of 0.2 to 0.4 MPa. The cleaning time is set to 5-10 minutes. After cleaning, rinse with pure water at room temperature or slightly hot.

[0031] (4) The workpiece after rinsing is baked at a temperature of 120-140°C until the surface of the workpiece is completely dry, thus completing the entire cleaning process.

[0032] The beneficial effects obtained by this invention are as follows:

[0033] The cleaning agent composition provided by this invention can thoroughly remove dense saponified powder from the surface of aluminum alloy workpieces. After cleaning, the workpieces have high cleanliness, no watermarks, and easily pass the 38# dyne test, providing a perfect surface for subsequent processes. The corrosion inhibition system ensures that the aluminum alloy workpieces are free from any corrosion, pitting, or discoloration after efficient cleaning, with a mass production yield of over 99%. At the same time, this cleaning agent composition eliminates strong acids, strong alkalis, phosphides, and volatile organic solvents. The main components are easily biodegradable, meeting the requirements of green manufacturing. The cleaning process of the cleaning agent composition of this invention is simple, the cleaning agent components are safe and environmentally friendly, and will not cause pollution to the environment, meeting the needs of large-scale automated industrial production. Attached Figure Description

[0034] Figure 1 Comparison chart of dyne testing after case cleaning;

[0035] In the figures, A is the result of the dyne test after cleaning in Example 1, B is the result of the dyne test after cleaning in Comparative Example 1, C is the result of the dyne test after cleaning in Comparative Example 2, and D is the result of the dyne test after cleaning in Comparative Example 3. Detailed Implementation

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. The present invention will be described in detail below with reference to the embodiments.

[0037] An aluminum alloy saponifying powder cleaning agent composition, comprising the following components by weight percentage:

[0038] Softener: 10-20%, chelating agent: 8-14%, surfactant: 5-10%, penetrant: 3-8%, corrosion inhibitor: 2-4%, solubilizer: 1-3%, defoamer: 0.3-0.8%, balance is water.

[0039] The softening agent is at least one of sulfosalicylic acid and salicylic acid. Since saponified powder is a dense layer of metallic soap (fatty acid salt), it is difficult to remove by physical methods. The softening agent can quickly react with the surface of the saponified powder layer to generate liquid fatty acids. Combined with penetrants and chelating agents, it can quickly penetrate into the pores of the saponified powder layer, wetting the saponified powder and dispersing the fatty acids, further accelerating the dissolution rate of the saponified powder layer. This step fundamentally transforms the hard solid residue into easily removable liquid oil stains, representing the "ice-breaking" first step in the entire cleaning process.

[0040] The chelating agent is at least one of maleic acid, fumaric acid, and maleic acid-acrylic acid copolymer. When the softener converts the saponified powder into fatty acids, a large number of fatty acid molecules easily re-aggregate or adhere to the workpiece surface. The chelating agent can bind and disperse these newly generated fatty acid molecules through its functional groups, preventing them from forming new dirt spots or redepositing. Simultaneously, it can also chelate calcium and magnesium ions in the water, preventing scale formation.

[0041] The surfactant is at least one of glycerol polyoxyethylene ether polyoxypropylene ether and alkyl dimethyl amine oxide, wherein the surfactant glycerol polyoxyethylene ether polyoxypropylene ether is not less than 5%. The main function of the surfactant is to reduce interfacial tension. The surfactant has a good emulsifying effect, which emulsifies the oily fatty acid dirt that has been broken down and dispersed to form a stable oil-in-water emulsion. This completely removes the dirt from the aluminum alloy surface and suspends it in the cleaning solution, where it is carried away by the liquid flow. When combined with a solubilizer, it can better dissolve oily dirt such as fatty acids and remove it from the aluminum alloy surface.

[0042] The penetrant is sodium dioctyl sulfosuccinate. The penetrant significantly reduces the surface tension of the cleaning fluid, allowing it to quickly wet the entire surface of the saponified powder layer and penetrate into its micropores and cracks.

[0043] The corrosion inhibitor is any one of Lan-826, tannic acid, gallic acid, and ellagic acid. The corrosion inhibitor can quickly form a uniform protective film on the aluminum alloy surface. This film effectively isolates the cleaning agent from the chemical attack on the aluminum substrate, thereby preventing corrosion, pitting, loss of gloss, or yellowing.

[0044] The solubilizer is any one of glycine, leucine, L-lysine, and L-alanine. The solubilizer itself is amphiphilic, which can increase the solubility of oily substances in the cleaning solution system. This helps maintain the stability of the cleaning solution and prevents the emulsified oil from separating and precipitating at low temperatures or high concentrations, thereby ensuring continuous cleaning efficiency and preventing secondary contamination.

[0045] The defoamer is a polyether defoamer. Polyether defoamers effectively suppress and eliminate foam, ensuring the stable and continuous operation of the horizontal spray cleaning line and meeting the needs of industrial mass production.

[0046] The preparation method of the cleaning agent composition of the present invention is as follows: deionized water, softener, chelating agent, surfactant, penetrant, corrosion inhibitor, solubilizer and defoamer are added to the reaction vessel in sequence according to the mass percentage of each component, and stirred until each component is completely dissolved to obtain the concentrated solution of the cleaning agent composition.

[0047] The method of using the cleaning agent composition of the present invention involves using a horizontal spray cleaning line. The cleaning agent concentrate is diluted with water at a mass percentage of 10-20% to form the working solution. The cleaning temperature is controlled at 50-60℃, the spray pressure is controlled at 0.2-0.4MPa, and the spray cleaning time is controlled at 5-10 minutes until the required cleanliness is achieved. After rinsing with pure water spray, the product is then dried in a tunnel oven at 120-140℃ until completely dry, thus completing the cleaning process.

[0048] Example 1

[0049] A cleaning agent composition for aluminum alloy saponification powder comprises the following components by weight percentage: 10% sulfosalicylic acid, 8% maleic acid, 5% glycerol polyoxyethylene ether polyoxypropylene ether, 3% sodium dioctyl sulfosuccinate, 1% Lan-826, 1% tannic acid, 1% glycine, 0.3% polyether defoamer, and the balance being deionized water.

[0050] The preparation steps of the aluminum alloy saponified powder cleaning agent composition in this embodiment are as follows: Deionized water, sulfosalicylic acid, maleic acid, glycerol polyoxyethylene ether polyoxypropylene ether, sodium dioctyl sulfosuccinate, Lan-826, tannic acid, glycine and polyether defoamer are added to the reaction vessel in the above-mentioned raw material mass percentages and stirred until completely dissolved to obtain the concentrated cleaning agent composition.

[0051] The method of using the aluminum alloy saponifying powder cleaning agent composition in this embodiment includes the following steps:

[0052] (1) The cleaning agent concentrate is diluted with deionized water at a mass fraction of 10% and stirred evenly to obtain the cleaning working solution;

[0053] (2) Inject the prepared working fluid into the storage tank of the horizontal spray cleaning line, and use the heating system to control and maintain its temperature at 50°C.

[0054] (3) Use a fan-shaped nozzle to spray and clean each surface of the workpiece at a spray pressure of 0.2 MPa. The cleaning time is set to 5 minutes. After cleaning, rinse with pure water at room temperature or slightly hot.

[0055] (4) The workpiece after rinsing is baked at 120°C until the surface of the workpiece is completely dry, thus completing the entire cleaning process.

[0056] Example 2

[0057] A cleaning agent composition for aluminum alloy saponification powder comprises the following raw materials in the indicated weight percentages: 20% salicylic acid, 8% maleic acid, 5% glycerol polyoxyethylene ether polyoxypropylene ether, 3% alkyl dimethylamine oxide, 3% sodium dioctyl sulfosuccinate, 1% Lan-826, 2% gallic acid, 2% leucine, 0.5% polyether defoamer, and the balance being deionized water.

[0058] The preparation steps of the aluminum alloy saponified powder cleaning agent composition in this embodiment are as follows: Deionized water, salicylic acid, maleic acid, glycerol polyoxyethylene ether polyoxypropylene ether, alkyl dimethylamine oxide, sodium dioctyl sulfosuccinate, Lan-826, gallic acid, leucine and polyether defoamer are added to the reaction vessel in the above-mentioned raw material mass percentages and stirred until completely dissolved to obtain the concentrated cleaning agent composition.

[0059] The method of using the aluminum alloy saponifying powder cleaning agent composition in this embodiment includes the following steps:

[0060] (1) The cleaning agent concentrate is diluted with deionized water at a mass fraction of 10% and stirred evenly to obtain the cleaning working solution;

[0061] (2) Inject the prepared working fluid into the storage tank of the horizontal spray cleaning line, and use the heating system to control and maintain its temperature at 60°C.

[0062] (3) Use a fan-shaped nozzle to spray and clean each surface of the workpiece at a spray pressure of 0.2 MPa. The cleaning time is set to 5 minutes. After cleaning, rinse with pure water at room temperature or slightly hot.

[0063] (4) The workpiece after rinsing is baked at 120°C until the surface of the workpiece is completely dry, thus completing the entire cleaning process.

[0064] Example 3

[0065] A cleaning agent composition for aluminum alloy saponification powder comprises the following raw materials in the indicated weight percentages: 5% sulfosalicylic acid, 10% salicylic acid, 10% fumaric acid, 6% glycerol polyoxyethylene ether polyoxypropylene ether, 4% alkyl dimethylamine oxide, 8% sodium dioctyl sulfosuccinate, 1% Lan-826, 1% ellagic acid, 2% L-lysine, 0.8% polyether defoamer, and the balance being deionized water.

[0066] The preparation steps of the aluminum alloy saponified powder cleaning agent composition in this embodiment are as follows: Deionized water, sulfosalicylic acid, salicylic acid, fumaric acid, glycerol polyoxyethylene ether polyoxypropylene ether, alkyl dimethylamine oxide, sodium dioctyl sulfosuccinate, Lan-826, ellagic acid, L-lysine and polyether defoamer are added to the reaction vessel in the above-mentioned raw material mass percentages and stirred until completely dissolved to obtain the concentrated cleaning agent composition.

[0067] The method of using the aluminum alloy saponifying powder cleaning agent composition in this embodiment includes the following steps:

[0068] (1) The cleaning agent concentrate is diluted with deionized water at a mass fraction of 20% and stirred evenly to obtain the cleaning working solution;

[0069] (2) Inject the prepared working fluid into the storage tank of the horizontal spray cleaning line, and use the heating system to control and maintain its temperature at 60°C.

[0070] (3) Use a fan-shaped nozzle to spray and clean each surface of the workpiece at a spray pressure of 0.3 MPa. The cleaning time is set to 10 minutes. After cleaning, rinse with pure water at room temperature or slightly warm.

[0071] (4) The workpiece after rinsing is baked at 120°C until the surface of the workpiece is completely dry, thus completing the entire cleaning process.

[0072] Example 4

[0073] A cleaning agent composition for aluminum alloy saponification powder comprises the following raw materials in the indicated mass percentages: 10% sulfosalicylic acid, 10% salicylic acid, 14% maleic acid-acrylic acid copolymer, 10% glycerol polyoxyethylene ether polyoxypropylene ether, 5% sodium dioctyl sulfosuccinate, 2% Lan-826, 2% tannic acid, 3% L-alanine, 0.8% polyether defoamer, and the balance being deionized water.

[0074] The preparation steps of the aluminum alloy saponified powder cleaning agent composition in this embodiment are as follows: Deionized water, sulfosalicylic acid, salicylic acid, maleic acid-acrylic acid copolymer, glycerol polyoxyethylene ether polyoxypropylene ether, sodium dioctyl sulfosuccinate, Lan-826, tannic acid, L-alanine and polyether defoamer are added to the reaction vessel in the above-mentioned raw material mass percentages and stirred until completely dissolved to obtain the concentrated cleaning agent composition.

[0075] The method of using the aluminum alloy saponifying powder cleaning agent composition in this embodiment includes the following steps:

[0076] (1) The cleaning agent concentrate is diluted with deionized water at a mass fraction of 20% and stirred evenly to obtain the cleaning working solution;

[0077] (2) Inject the prepared working fluid into the storage tank of the horizontal spray cleaning line, and use the heating system to control and maintain its temperature at 60°C.

[0078] (3) Use a fan-shaped nozzle to spray and clean each surface of the workpiece at a spray pressure of 0.3 MPa. The cleaning time is set to 10 minutes. After cleaning, rinse with pure water at room temperature or slightly warm.

[0079] (4) The workpiece after rinsing is baked at 120°C until the surface of the workpiece is completely dry, thus completing the entire cleaning process.

[0080] Example 5

[0081] A cleaning agent composition for aluminum alloy saponification powder comprises the following raw materials in the indicated mass percentages: 20% sulfosalicylic acid, 10% maleic acid, 10% glycerol polyoxyethylene ether polyoxypropylene ether, 8% sodium dioctyl sulfosuccinate, 2% Lan-826, 2% ellagic acid, 3% glycine, 0.8% polyether defoamer, and the balance being deionized water.

[0082] The preparation steps of the aluminum alloy saponified powder cleaning agent composition in this embodiment are as follows: Deionized water, sulfosalicylic acid, maleic acid, glycerol polyoxyethylene ether polyoxypropylene ether, sodium dioctyl sulfosuccinate, Lan-826, ellagic acid, glycine and polyether defoamer are added to the reaction vessel in the above-mentioned raw material mass percentages and stirred until completely dissolved to obtain the concentrated cleaning agent composition.

[0083] The method of using the aluminum alloy saponifying powder cleaning agent composition in this embodiment includes the following steps:

[0084] (1) The cleaning agent concentrate is diluted with deionized water at a mass fraction of 20% and stirred evenly to obtain the cleaning working solution;

[0085] (2) Inject the prepared working fluid into the storage tank of the horizontal spray cleaning line, and use the heating system to control and maintain its temperature at 60°C.

[0086] (3) Use a fan-shaped nozzle to spray and clean each surface of the workpiece at a spray pressure of 0.3 MPa. The cleaning time is set to 10 minutes. After cleaning, rinse with pure water at room temperature or slightly warm.

[0087] (4) The workpiece after rinsing is baked at 120°C until the surface of the workpiece is completely dry, thus completing the entire cleaning process.

[0088] Comparative Example 1

[0089] A cleaning agent composition for aluminum alloy saponification powder comprises the following raw materials in the indicated mass percentages: maleic acid 10%, glycerol polyoxyethylene ether polyoxypropylene ether 10%, sodium dioctyl sulfosuccinate 8%, Lan-826 2%, ellagic acid 2%, glycine 1%, polyether defoamer 0.8%, and deionized water as the balance.

[0090] The preparation steps of the aluminum alloy saponified powder cleaning agent composition in this embodiment are as follows: Deionized water, maleic acid, glycerol polyoxyethylene ether polyoxypropylene ether, sodium dioctyl sulfosuccinate, Lan-826, ellagic acid, glycine and polyether defoamer are added to the reaction vessel in the above-mentioned raw material mass percentages and stirred until completely dissolved to obtain the concentrated cleaning agent composition.

[0091] The method of using the aluminum alloy saponifying powder cleaning agent composition in this embodiment includes the following steps:

[0092] (1) The cleaning agent concentrate is diluted with deionized water at a mass fraction of 20% and stirred evenly to obtain the cleaning working solution;

[0093] (2) Inject the prepared working fluid into the storage tank of the horizontal spray cleaning line, and use the heating system to control and maintain its temperature at 60°C.

[0094] (3) Use a fan-shaped nozzle to spray and clean each surface of the workpiece at a spray pressure of 0.3 MPa. The cleaning time is set to 10 minutes. After cleaning, rinse with pure water at room temperature or slightly warm.

[0095] (4) The workpiece after rinsing is baked at 120°C until the surface of the workpiece is completely dry, thus completing the entire cleaning process.

[0096] Comparative Example 2

[0097] A cleaning agent composition for aluminum alloy saponification powder comprises the following raw materials in the indicated mass percentages: 10% sulfosalicylic acid, 8% maleic acid, 5% glycerol polyoxyethylene ether polyoxypropylene ether, 1% Lan-826, 1% tannic acid, 1% glycine, 0.3% polyether defoamer, and the balance being deionized water.

[0098] The preparation steps of the aluminum alloy saponified powder cleaning agent composition in this embodiment are as follows: Deionized water, sulfosalicylic acid, maleic acid, glycerol polyoxyethylene ether polyoxypropylene ether, Lan-826, tannic acid, glycine and polyether defoamer are added to the reaction vessel in the above-mentioned raw material mass percentages and stirred until completely dissolved to obtain the concentrated cleaning agent composition.

[0099] The method of using the aluminum alloy saponifying powder cleaning agent composition in this embodiment includes the following steps:

[0100] (1) The cleaning agent concentrate is diluted with deionized water at a mass fraction of 20% and stirred evenly to obtain the cleaning working solution;

[0101] (2) Inject the prepared working fluid into the storage tank of the horizontal spray cleaning line, and use the heating system to control and maintain its temperature at 60°C.

[0102] (3) Use a fan-shaped nozzle to spray and clean each surface of the workpiece at a spray pressure of 0.3 MPa. The cleaning time is set to 10 minutes. After cleaning, rinse with pure water at room temperature or slightly warm.

[0103] (4) The workpiece after rinsing is baked at 120°C until the surface of the workpiece is completely dry, thus completing the entire cleaning process.

[0104] Comparative Example 3

[0105] A cleaning agent composition for aluminum alloy saponification powder comprises the following raw materials in the indicated mass percentages: 10% sulfosalicylic acid, 8% maleic acid, 5% glycerol polyoxyethylene ether polyoxypropylene ether, 3% sodium dioctyl sulfosuccinate, 1% tannic acid, 1% glycine, 0.3% polyether defoamer, and the balance being deionized water.

[0106] The preparation steps of the aluminum alloy saponified powder cleaning agent composition in this embodiment are as follows: Deionized water, sulfosalicylic acid, maleic acid, glycerol polyoxyethylene ether polyoxypropylene ether, sodium dioctyl sulfosuccinate, tannic acid, glycine and polyether defoamer are added to the reaction vessel in the above-mentioned raw material mass percentages and stirred until completely dissolved to obtain the concentrated cleaning agent composition.

[0107] The method of using the aluminum alloy saponifying powder cleaning agent composition in this embodiment includes the following steps:

[0108] (1) The cleaning agent concentrate is diluted with deionized water at a mass fraction of 10% and stirred evenly to obtain the cleaning working solution;

[0109] (2) Inject the prepared working fluid into the storage tank of the horizontal spray cleaning line, and use the heating system to control and maintain its temperature at 60°C.

[0110] (3) Use a fan-shaped nozzle to spray and clean each surface of the workpiece at a spray pressure of 0.2 MPa. The cleaning time is set to 5 minutes. After cleaning, rinse with pure water at room temperature or slightly hot.

[0111] (4) The workpiece after rinsing is baked at 120°C until the surface of the workpiece is completely dry, thus completing the entire cleaning process.

[0112] After cleaning, the aluminum alloy workpieces are visually inspected for surface cleanliness and the presence of discoloration or corrosion. The Dyne value is then tested using an A.Shine 38# dyne pen to determine if it meets the standard.

[0113] Table 1-1 Test results of various indicators in the example

[0114] Example Cleanliness yield Corrosion discoloration rate Dyne value test Overall yield Example 1 99.5％ 0.2％ No shrinkage / OK 99.3％ Example 2 99.4％ 0.1％ No shrinkage / OK 99.3％ Example 3 99.6％ 0.1％ No shrinkage / OK 99.5％ Example 4 99.7％ 0.2％ No shrinkage / OK 99.5％ Example 5 99.8％ 0.2％ No shrinkage / OK 99.6％ Comparative Example 1 73.8％ 0 Shrinkage / NG 0 Comparative Example 2 90.4％ 0.2％ No shrinkage / OK 90.2％ Comparative Example 3 99.6％ 100% yellowing No shrinkage / OK 0％

[0115] As can be seen from Table 1-1 above, after cleaning with the cleaning agent provided by this invention, the overall yield of aluminum alloy stamping parts exceeded 99%, and the dyne value tests were all OK. A comparison chart of dyne tests after cleaning in the implementation cases is attached. Figure 1 As shown: Figure 1 -As shown in Example 1, the surface cleanliness and gloss of the workpiece after cleaning are OK, and the dyne pen test shows no shrinkage. Figure 1 - Comparative Example 1 shown in B is a workpiece after cleaning with a formula lacking the softener component. Some workpieces were not completely cleaned of the saponified powder layer, resulting in severe shrinkage as shown in the dyne pen test, which did not meet the requirements for good cleaning products. Figure 1 - Comparative Example 2 shown in C is a workpiece cleaned with a formula lacking the penetrant component. A small amount of saponified powder residue was still present in some parts of a few workpieces. Although the local dyne value was acceptable, the overall cleaning yield was still lower than that of Example 1. Figure 1-D shows that the dyne value test of the cleaned workpiece is okay after the main corrosion inhibitor component Lan826 is missing, but the surface gloss of corrosion decreases and the overall appearance is white or yellow, which is NG.

[0116] Therefore, this invention successfully provides a highly efficient, safe, and environmentally friendly cleaning solution through the synergistic effect of multiple components, including softeners, penetrants, chelating agents, surfactants, solubilizers, and corrosion inhibitors. Test results show that this solution achieves a cleanliness rate exceeding 99.3% for cleaning saponified powder on aluminum alloy surfaces, ensuring no corrosion of the workpiece and fully meeting dyne value requirements. It perfectly solves industry problems associated with traditional cleaning agents, such as incomplete cleaning, workpiece corrosion, or failure to meet subsequent process requirements, making it particularly suitable for industrial production in high-demand manufacturing industries such as new energy vehicles.

[0117] The cleaning agent composition provided by this invention is suitable for cleaning stamping processes of most metals using saponified liquid for cooling and lubrication, especially for cleaning aluminum alloy materials. It is safe and non-corrosive to aluminum alloys, and the cleaned aluminum alloy workpieces meet the cleanliness standards, are free of watermarks, and easily exceed 38# dyne values. The mass production yield is as high as 99% or more. The cleaning process of the cleaning agent composition of this invention is simple, the cleaning agent components are safe and environmentally friendly, and will not cause pollution to the environment. It can meet the needs of large-scale automated industrial production.

[0118] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A composition of aluminum alloy saponifying powder cleaning agent, characterized in that, The composition consists of the following raw materials in mass percentage: Softener: 10-20%; Chelating agent: 8-14%; Surfactant: 5-10%; Penetrant: 3-8%; Corrosion inhibitor: 2-4%; Solubilizer: 1-3%; Defoamer: 0.3–0.8%; The remainder is deionized water.

2. The aluminum alloy saponifying powder cleaning agent composition according to claim 1, characterized in that: The softening agent is at least one of sulfosalicylic acid and salicylic acid.

3. The aluminum alloy saponifying powder cleaning agent composition according to claim 1, characterized in that: The chelating agent is at least one of maleic acid, fumaric acid, and maleic acid-acrylic acid copolymer.

4. The aluminum alloy saponifying powder cleaning agent composition according to claim 1, characterized in that: The surfactant is at least one of glycerol polyoxyethylene ether polyoxypropylene ether and alkyl dimethylamine oxide.

5. The aluminum alloy saponifying powder cleaning agent composition according to claim 1, characterized in that: The penetrant is sodium dioctyl sulfosuccinate.

6. The aluminum alloy saponifying powder cleaning agent composition according to claim 1, characterized in that: The corrosion inhibitor is selected from any one of Lan-826, tannic acid, gallic acid, and ellagic acid.

7. The aluminum alloy saponifying powder cleaning agent composition according to claim 1, characterized in that: The solubilizer is any one of glycine, leucine, L-lysine, and L-alanine.

8. The aluminum alloy saponifying powder cleaning agent composition according to claim 1, characterized in that: The defoamer is selected as a polyether defoamer.

9. A method for preparing an aluminum alloy saponifying powder cleaning agent composition as described in any one of claims 1-8, characterized in that: Includes the following steps: Deionized water is added to the reactor. The softener, chelating agent, surfactant, penetrant, corrosion inhibitor, solubilizer, and defoamer are added to the reactor in the order of their respective mass percentages. The mixture is stirred until all components are completely dissolved to obtain a concentrated solution of the cleaning agent composition.

10. A method of using the aluminum alloy saponifying powder cleaning agent composition as described in claim 9, characterized in that: Includes the following steps: (1) The cleaning agent concentrate is diluted with deionized water at a mass fraction of 10-20% and stirred evenly to obtain the cleaning working solution; (2) Inject the prepared working fluid into the storage tank of the horizontal spray cleaning line, and use the heating system to control and maintain its temperature at 50-60℃. (3) Use a fan-shaped nozzle to spray and clean each surface of the workpiece at a spray pressure of 0.2 to 0.4 MPa. The cleaning time is set to 5-10 minutes. After cleaning, rinse with pure water at room temperature or slightly hot. (4) The workpiece after rinsing is baked at a temperature of 120-140°C until the surface of the workpiece is completely dry, thus completing the entire cleaning process.

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