A metalworking article surface cleaning agent composition and methods of making and using the same

Abstract

The application relates to the technical field of cleaning agents, and particularly discloses a metal processing product surface cleaning agent composition and a preparation and use method thereof. The cleaning agent composition comprises the following raw materials in parts by weight: 1-5 parts of a surface-active peptide, 2-5 parts of a rhamnolipid biosurfactant, 1-3 parts of sodium polyaspartate, 1-5 parts of lysine, 3-6 parts of sodium oxalate, 0.1-1 part of a defoaming agent, 7-12 parts of a compound, and 30-50 parts of water, wherein the compound is composed of saponin and modified sophorolipid; the preparation method comprises the following steps: placing the surface-active peptide and the lysine into water, uniformly mixing, heating and warming, reacting, cooling and cooling, and then adding the rhamnolipid biosurfactant, the sodium polyaspartate, the sodium oxalate, the defoaming agent and the compound, uniformly mixing, and obtaining the cleaning agent composition. The cleaning agent composition has the advantages of improving the oil removal effect and protecting the environment through the synergistic effect of the raw materials.

Description

Technical Field

[0001] This application relates to the field of cleaning agent technology, and in particular to a surface cleaning agent composition for metal processed products and its preparation and application methods. Background Technology

[0002] In the manufacturing and processing of mechanical parts, a large amount of oily media is often used for lubrication, cooling, or rust prevention to ensure smooth and efficient processing. Therefore, varying amounts of oily media, including cutting oil, quenching oil, rolling oil, and rust-preventive oil, will remain on the surface of metal parts. If these residual oily media are not cleaned efficiently, they will not only affect subsequent processing steps but also adversely impact product quality.

[0003] Metal cleaning is an essential process in the processing, assembly, storage and maintenance of metal parts. Metal processing industry cleaning technology refers to the surface cleaning of various workpieces and profiles before and after processing or before and after metal surface treatment, as well as before sealing and rust prevention. The cleaning object is the metal surface, and the dirt is mainly residual lubricant from metal processing or rust-preventive oil used when sealing equipment and workpieces.

[0004] Currently, most commonly used metal processing surface cleaning agents contain carcinogenic substances such as nitrites, phosphorus-containing additives that cause eutrophication, and APEO surfactants that cause environmental pollution. These substances are biotoxic when released into the environment, pollute the environment, and have a generally poor degreasing effect. Summary of the Invention

[0005] To improve degreasing effect and protect the environment, this application provides a surface cleaning agent composition for metal processed products and its preparation and application method.

[0006] In a first aspect, this application provides a surface cleaning agent composition for metal processed products, which adopts the following technical solution: A surface cleaning agent composition for metal processed products, comprising the following raw materials in parts by weight: 1-5 parts of surfactant peptide, 2-5 parts of rhamnolipin biosurfactant, 1-3 parts of sodium polyaspartate, 1-5 parts of lysine, 3-6 parts of sodium oxalate, 0.1-1 parts of defoamer, 7-12 parts of complex, and 30-50 parts of water, wherein the complex is a compound of saponin and modified sophorolipid.

[0007] By adopting the above technical solution, the surface cleaning agent composition for metal processing products of this application, through the synergistic effect between the raw materials, can not only reduce the foam height, maintain good high and low temperature stability and high alkali resistance, but also improve the degreasing rate and oil removal effect. The degreasing rate is 98.83-99.98%, the foam height is 2.1-4.2mm, and it is uniform, does not separate, and has no precipitates under high and low temperature conditions. Under high alkali conditions, it is uniform, does not separate, has no precipitates, and has no flocculent floating matter.

[0008] Surfactant peptides are anionic surfactants metabolized by microorganisms. They possess excellent low-temperature detergency, solubilizing, dispersing, and wetting properties, as well as good foaming and foam-stabilizing properties. They are also highly biodegradable, making them an environmentally friendly and pollution-free biosurfactant. Rhamnose lipolipide biosurfactants are composed of an ester structure formed from rhamnose and two molecules of β-hydroxydecanoic acid. They exhibit good wetting, penetrating, emulsifying, dispersing, and detergency abilities, are completely degradable, and are harmless to the environment. Sodium polyaspartate is a chelating agent, phosphorus-free, and will not cause eutrophication of water bodies due to discharge. Its degradation products are amino acids, which can be absorbed and utilized by organisms and leave no residue in the soil. Lysine can reduce rusting on the surface of metal products.

[0009] The complex is a blend of saponins and modified sophorolipids. Saponins are plant-derived surfactants with strong cleaning power, good wetting and dispersing properties, are environmentally friendly, do not pollute the environment, and are biodegradable. Sophorolipids are glycolipid biosurfactants with solubilizing, emulsifying, wetting, foaming, dispersing, and surface tension-reducing properties. They are also non-toxic, 100% biodegradable, temperature-resistant, and high-salt-resistant. Modified sophorolipids further enhance the cleaning power. The complex prepared by blending saponins and modified sophorolipids reduces surface tension and enhances surface activity and solubilization, thereby improving the cleaning performance of metal products, increasing degreasing efficiency, and contributing to environmental protection.

[0010] Preferably, the complex is prepared by the following method: adding a catalyst to saponins, mixing evenly, heating, adding modified sophorolipids, mixing evenly, adjusting the pH value, cooling, and obtaining the complex.

[0011] Furthermore, the complex is prepared by the following method: adding a catalyst to saponin, mixing evenly, heating to 40-60℃, adding modified sophorolipid, mixing evenly, adjusting the pH to neutral with citric acid solution, and cooling to 22±3℃ to obtain the complex;

[0012] The weight ratio of modified sophorolipid to catalyst is 1:(0.1-0.3), the catalyst is sodium methoxide, and the concentration of citric acid solution is 0.1 mol / L.

[0013] By adopting the above technical solution and using the above preparation method to prepare the complex, saponins and modified sophorolipids can be better combined, making the complex have better cleaning ability, thereby improving the degreasing effect on metal processed products.

[0014] Preferably, the weight ratio of the saponins and modified sophorolipids is (0.4-0.6):1.

[0015] Adding too little saponin will result in incomplete reaction of the modified sophorolipid, affecting the yield of the complex and thus the degreasing effect. Adding too much saponin will lead to waste of raw materials when the reaction with the modified sophorolipid reaches completion. By adopting the above technical solution, when the amount of saponin added is within the above range, the complex can better improve the degreasing effect on metal processed products.

[0016] Preferably, the modified sophorolipid is prepared by the following method: mixing sophorolipid and ethanolamine, adding a catalyst, mixing evenly, heating to increase the temperature, reacting, cooling down, adjusting the pH value, and obtaining the modified sophorolipid.

[0017] Furthermore, the modified sophorolipid is prepared by the following method: sophorolipid and ethanolamine are mixed, a catalyst is added, the mixture is stirred evenly, heated to 40-80℃, reacted for 4-6 hours, cooled to 22±3℃, and the pH is adjusted to neutral with sodium hydroxide solution to obtain the modified sophorolipid.

[0018] The weight ratio of sophorolipid to catalyst is 1:(0.1-0.2), and the catalyst is C. 12 Branched alkylbenzene sulfonic acid, with a sodium hydroxide solution mass fraction of 30%.

[0019] By adopting the above technical solution, ethanolamine is used to modify sophorolipids. The resulting modified sophorolipids can better reduce the interfacial tension between oil and water, thus giving them better degreasing and cleaning capabilities and further improving the degreasing effect on metal products. Moreover, ethanolamine is biodegradable and will not accumulate in the environment for a long time, thus not causing pollution to the environment.

[0020] Preferably, the weight ratio of sophorolipid to ethanolamine is 1:(1-3).

[0021] Insufficient addition of ethanolamine leads to incomplete modification of sophorolipids, failing to enhance degreasing effectiveness. Excessive addition, upon reaching saturation of sophorolipid modification, results in wasted ethanolamine and an alkaline cleaning agent composition, exacerbating corrosion of metal products. By employing the above-mentioned technical solution, when the amount of ethanolamine added is within the specified range, it better modifies sophorolipids, resulting in superior degreasing and cleaning performance.

[0022] Preferably, the sophorolipid is filtered through a gel filter layer before use.

[0023] Furthermore, the sophorolipid is filtered through a gel filtration layer before use, wherein the gel is a modified sodium alginate gel, and the specific preparation method is as follows:

[0024] S1: Add chitin to an aqueous solution of sodium hydroxide and urea, mix well to obtain a chitin solution;

[0025] S2: Add sodium alginate to water and mix well to obtain a sodium alginate solution;

[0026] S3: Mix chitin solution and sodium alginate solution evenly to obtain a mixture. Under the conditions of a water bath at 40-60℃, add the mixture dropwise to calcium chloride solution at a rate of 1-3 ml / min. Let stand for 4-6 hours to obtain gel spheres. Wash with water 4-6 times to obtain modified sodium alginate gel.

[0027] The weight ratio of chitin to sodium alginate is (0.4-0.6):1, the weight ratio of the aqueous solution of sodium alginate, sodium hydroxide and urea is 1:(0.8-1.2), the mass fraction of sodium hydroxide in the aqueous solution of sodium hydroxide and urea is 12% and the mass fraction of urea is 4%, the weight ratio of sodium alginate and water is 1:(15-25), and the mass fraction of calcium chloride solution is 5%.

[0028] By adopting the above technical solution, strong intermolecular hydrogen bonds exist between chitosan and sodium alginate, which can form a network structure and enhance the mechanical properties of the gel. Furthermore, by modifying sodium alginate with chitosan, the interaction between amino, hydroxyl, and amide groups and the carboxyl and hydroxyl groups in sodium alginate increases the number of active groups, thereby improving the adsorption performance. This enables the adsorption of impurities in sophorolipids, thus improving the cleaning performance of sophorolipids and enhancing the degreasing effect on metal processed products.

[0029] Preferably, the defoamer is a polyether-modified silicone oil defoamer.

[0030] By adopting the above technical solution, polyether-modified silicone oil defoamer can suppress foam for a long time and exhibit excellent defoaming effect in solution. It also has better dispersibility, is non-irritating, has no side effects, and can maintain good stability under acid and alkaline conditions. When applied to the raw materials of cleaning agent compositions, it can achieve better defoaming effect.

[0031] Secondly, this application provides a method for preparing a surface cleaning agent composition for metal processed products, using the following technical solution:

[0032] A method for preparing a surface cleaning agent composition for metal processed products includes the following steps:

[0033] Surfactant peptides and lysine are placed in water, mixed evenly, heated to a high temperature, reacted, cooled and cooled, and then rhamnolipid biosurfactant, sodium polyaspartate, sodium oxalate, defoamer, and complex are added and mixed evenly to obtain a cleaning agent composition.

[0034] Furthermore, a method for preparing a surface cleaning agent composition for metal processed products includes the following steps: placing surface-active peptides and lysine into water, mixing them evenly, heating to 50-60℃, reacting for 5-7 hours, cooling to 22±3℃, and then adding rhamnolipid biosurfactant, sodium polyaspartate, sodium oxalate, defoamer, and complex, mixing evenly to obtain the cleaning agent composition.

[0035] By adopting the above technical solution and using the above method to prepare the cleaning agent composition, it is easier to mix the raw materials more evenly, so that the raw materials can play a better role and help to further improve the degreasing effect on metal processed products.

[0036] Thirdly, this application provides a method for using a surface cleaning agent composition for metal processed products, employing the following technical solution:

[0037] A method for using a surface cleaning agent composition for metal products includes the following steps: diluting the composition, heating it to a certain temperature, immersing it in the metal product, cleaning, and rinsing to remove oil stains.

[0038] Furthermore, a method for using a surface cleaning agent composition for metal products includes the following steps: diluting the composition 5-10 times, heating it to 40-60°C, immersing it in the metal product, cleaning for 10-20 minutes, and rinsing with soft water for 4-6 minutes to remove oil stains.

[0039] By adopting the above technical solution and using the above method to apply the cleaning agent composition, oil stains on metal products can be removed more effectively.

[0040] In summary, this application includes at least one of the following beneficial technical effects:

[0041] 1. Because this application uses a compound made of saponins and modified sophorolipids, the surface tension is reduced, and the surface activity and solubilization are enhanced, which can further improve the cleaning performance of metal products, improve the degreasing effect, and is beneficial to environmental protection. It can achieve a degreasing rate of 99.98%, reduce the foam height to 2.1 mm, and be uniform, non-stratified, and free of precipitates under high and low temperature conditions, and uniform, non-stratified, free of precipitates, and free of flocculent floating matter under high alkaline conditions.

[0042] 2. In this application, sophorolipid is preferably filtered through a gel filter layer before use to further adsorb impurities in the sophorolipid, thereby improving the purity of the sophorolipid and allowing it to function better, thus further improving the oil removal effect. Detailed Implementation

[0043] The following provides a more detailed description of this application in conjunction with specific details.

[0044] raw material

[0045] Surfactant peptides are a class of cyclic peptide biosurfactants with bio-metabolic properties produced by Bacillus subtilis; rhamnolipids are a type of biosurfactant with bio-metabolic properties produced by Pseudomonas or Burkholderia; sodium polyaspartate has a molecular weight of 5000; polyether-modified silicone oil defoamer has a molecular weight of 398, a refractive index of 1.558, and a density of 1.02 g / cm³. 3 .

[0046] Preparation Example

[0047] Preparation Example 1

[0048] A modified sophorolipid, prepared by the following method:

[0049] 2 kg of sophorolipid and 2 kg of ethanolamine were mixed, and 0.3 kg of catalyst was added. The mixture was stirred until homogeneous, heated to 60 °C, and reacted for 5 h. The mixture was then cooled to 25 °C, and the pH was adjusted to neutral with a 30% sodium hydroxide solution to obtain modified sophorolipid.

[0050] Preparation Example 2

[0051] A modified sophorolipid, which differs from Preparation Example 1 in that the amount of ethanolamine added is different; in Preparation Example 2, the amount of ethanolamine added is 4 kg.

[0052] Preparation Example 3

[0053] A modified sophorolipid, which differs from Preparation Example 1 in that the amount of ethanolamine added is different; in Preparation Example 3, the amount of ethanolamine added is 6 kg.

[0054] Preparation Example 4

[0055] A modified sophorolipid, which differs from Preparation Example 1 in that the amount of ethanolamine added is different; in Preparation Example 4, the amount of ethanolamine added is 0.1 kg.

[0056] Preparation Example 5

[0057] A complex prepared by the following method:

[0058] Add 0.4 kg of catalyst to 0.8 kg of saponins, mix well, heat to 50 °C, add 2 kg of modified sophorolipid, mix well, adjust the pH to neutral with 0.1 mol / L citric acid solution, and cool to 25 °C to obtain the complex.

[0059] Preparation Example 6

[0060] A complex, which differs from Preparation Example 5 in that the amount of saponin added is different; in Preparation Example 6, the amount of saponin added is 1 kg.

[0061] Preparation Example 7

[0062] A complex, which differs from Preparation Example 5 in that the amount of saponin added is different; in Preparation Example 7, the amount of saponin added is 1.2 kg.

[0063] Preparation Example 8

[0064] A complex, which differs from Preparation Example 5 in that the amount of saponin added is different; in Preparation Example 8, the amount of saponin added is 0.1 kg.

[0065] Preparation Examples 9-11

[0066] A complex, which differs from Preparation Example 6 in that the source of the modified sophorolipid is different; the modified sophorolipids in Preparation Examples 9-11 were prepared using Preparation Examples 2-4, respectively.

[0067] Preparation Example 12

[0068] A modified sodium alginate gel is prepared by the following method:

[0069] S1: Add 1 kg of chitin to an aqueous solution of 2 kg of sodium hydroxide and urea, mix well to obtain a chitin solution;

[0070] S2: Add 2 kg of sodium alginate to 40 kg of water and mix well to obtain a sodium alginate solution;

[0071] S3: Mix the chitin solution and sodium alginate solution evenly to obtain a mixture. Under the condition of 50℃ water bath, add the mixture dropwise to a 5% calcium chloride solution at a drop rate of 2ml / min. Let it stand for 5h to obtain gel balls. Wash with water 5 times to obtain modified sodium alginate gel.

[0072] Example

[0073] Example 1

[0074] A surface cleaning agent composition for metal processed products, the proportions of which are shown in Table 1.

[0075] A method for preparing a surface cleaning agent composition for metal processed products includes the following steps:

[0076] Surfactant peptides and lysine were placed in water, mixed evenly, heated to 55°C, reacted for 6 hours, cooled to 25°C, and then rhamnolipid biosurfactant, sodium polyaspartate, sodium oxalate, defoamer, and the complex prepared in Preparation Example 5 were added and mixed evenly to obtain a cleaning agent composition.

[0077] Examples 2-5

[0078] A surface cleaning agent composition for metal processed products differs from that in Example 1 in that the raw material ratios of the cleaning agent composition are different, as shown in Table 1.

[0079] Table 1. Raw materials of the cleaning agent compositions in different embodiments.

[0080]

[0081]

[0082] Examples 6-11

[0083] A surface cleaning agent composition for metal processed products, which differs from Example 4 in that the source of the complex in the cleaning agent composition is different. The complexes in Examples 6-11 were prepared using Preparation Examples 6-11, respectively.

[0084] Example 12

[0085] A surface cleaning agent composition for metal products, which differs from Example 9 in that the sophorolipid is filtered through a modified sodium alginate gel filter layer prepared in Preparation Example 12 before practical use.

[0086] Comparative Example

[0087] Comparative Example 1

[0088] A surface cleaning agent composition for metal processed products, which differs from Example 1 in that the cleaning agent complex does not contain any complex.

[0089] Comparative Example 2

[0090] A surface cleaning agent composition for metal processed products, which differs from Example 1 in that the cleaning agent complex is replaced by an equal amount of saponin.

[0091] Comparative Example 3

[0092] A surface cleaning agent composition for metal processed products, which differs from Example 1 in that the cleaning agent complex is replaced in equal amounts with modified sophorolipid.

[0093] Comparative Example 4

[0094] A surface cleaning agent composition for metal processed products, which differs from Example 1 in that the modified sophorolipid in the cleaning agent complex is replaced with an equal amount of sophorolipid.

[0095] Performance testing

[0096] The following performance tests were performed on Examples 1-12 and Comparative Examples 1-4:

[0097] Degreasing rate: Take a 50mm×25mm×2mm metal test piece of 304 stainless steel, polish it with 200 grit sandpaper, soak it in acetone and clean it, blow it dry and weigh it. The weight is 3.4256g, and its mass is m0. That is, m0 is 3.4256g. Store it in a desiccator for later use.

[0098] Artificial oil stains were prepared according to the mass ratio of 10% lithium-based grease, 6% lanolin, 30% petrolatum, 46% crude oil, and 8% chlorine trioxide. The artificial oil stains were evenly applied to the surface of the test piece using a scraper. The accurate weight is expressed as m1. Then, the cleaning agent compositions prepared in Example 112 and Comparative Examples 1-4 of this invention were poured into a washing tank. The test pieces were placed in the washing tank for cleaning. The cleaning method was as follows: the cleaning agent composition was diluted 8 times with water and heated to 50°C. The metal processed products were then immersed and cleaned for 15 minutes, followed by rinsing with soft water for 5 minutes. After rinsing, the samples were dried in a desiccator and weighed, expressed as m2. The test results are shown in Table 2.

[0099] Degreasing rate = m1-m2 / m1-m0

[0100] Note: m0 is the initial mass of the test piece;

[0101] m1 is the mass of the test piece after it has been coated with oil.

[0102] m2 is the mass of the test piece after cleaning.

[0103] Foam height: The foam height of the surfactant was measured according to JB / T4323-2019 "Water-based Metal Cleaning Agents", and the test results are shown in Table 3.

[0104] High and low temperature stability: The high and low temperature stability of the surfactant was determined according to JB / T4323-2019 "Water-based Metal Cleaning Agents", and the test results are shown in Table 3.

[0105] High alkali resistance: The surfactant was added to a 50% sodium hydroxide solution at a ratio of 15 wt%, stirred for 5 min, and then observed. The test results are shown in Table 3.

[0106] Table 2 Detection Results

[0107]

[0108]

[0109] Table 3 Detection Results

[0110]

[0111]

[0112] As can be seen from Tables 2 and 3, the surface cleaning agent composition for metal processing products of this application, through the synergistic effect between the raw materials, can not only reduce the foam height, maintain good high and low temperature stability and high alkali resistance, but also improve the degreasing rate and oil removal effect. The degreasing rate is 98.83-99.98%, the foam height is 2.1-4.2 mm, and it is uniform, does not separate, and has no precipitates under high and low temperature conditions. Under high alkali conditions, it is uniform, does not separate, has no precipitates, and has no flocculent floating matter.

[0113] Combining Example 1 and Comparative Examples 1-4, it can be seen that the cleaning agent composition in Example 1 has a degreasing rate of 99.28% and a foam height of 3.6 mm. It is uniform under high and low temperature conditions, without stratification or precipitation, and is also uniform under high alkalinity conditions, without stratification, precipitation, or flocculent floating. This is better than that of Comparative Examples 1-4, indicating that using a compound of saponins and modified sophorolipids as a complex is more suitable. It can not only reduce the foam height, maintain good high and low temperature stability and high alkalinity resistance, but also improve the degreasing rate and oil removal effect.

[0114] As can be seen from Examples 1-5, the cleaning agent composition in Example 4 has a degreasing rate of 99.52% and a foam height of 2.9 mm. It is uniform under high and low temperature conditions, without stratification or precipitation, and is also uniform under high alkalinity conditions, without stratification, precipitation, or flocculent floating. This is superior to other examples, indicating that the amount of each raw material added in Example 4 is more appropriate. It can not only reduce the foam height, maintain good high and low temperature stability and high alkalinity resistance, but also improve the degreasing rate and oil removal effect.

[0115] As can be seen from Examples 4 and 6-11, the cleaning agent composition in Example 9 has a degreasing rate of 99.87% and a foam height of 2.3 mm. It is uniform under high and low temperature conditions, without stratification or precipitation, and is also uniform under high alkalinity conditions, without stratification, precipitation, or flocculent floating. This is superior to other examples, indicating that the composite prepared in Example 9 is more suitable. While maintaining good high and low temperature stability and resistance to high alkalinity, it also reduces the foam height, increases the degreasing rate, and improves the oil removal effect.

[0116] Combining Examples 9 and 12, it can be seen that the cleaning agent composition in Example 12 has a degreasing rate of 99.98%, a foam height of 2.1 mm, and is uniform under high and low temperature conditions without stratification or precipitation. Under high alkaline conditions, it is also uniform without stratification, precipitation, or flocculent floating, which is superior to Example 9. This indicates that it is more appropriate to filter the sophorolipid through a gel filter layer before use, which removes impurities from the sophorolipid and further improves the degreasing rate and oil removal effect.

[0117] The embodiments described above are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A composition for cleaning the surface of metal processed products, characterized in that: It comprises the following raw materials in parts by weight: 1-5 parts of surfactant peptide, 2-5 parts of rhamnolipin biosurfactant, 1-3 parts of sodium polyaspartate, 1-5 parts of lysine, 3-6 parts of sodium oxalate, 0.1-1 parts of defoamer, 7-12 parts of complex, and 30-50 parts of water. The complex was prepared by the following method: sodium methoxide catalyst was added to saponins, mixed evenly, heated to 40-60℃, modified sophorolipids were added, mixed evenly, the pH was adjusted to neutral with citric acid solution, and cooled to 22±3℃ to obtain the complex. The weight ratio of saponins and modified sophorolipids is (0.4-0.6):1, and the weight ratio of modified sophorolipids and sodium methoxide catalyst is 1:(0.1-0.3). The modified sophorolipid was prepared by the following method: sophorolipid and ethanolamine were mixed, and C was added. 12 The branched alkylbenzene sulfonic acid catalyst was mixed evenly, heated to 40-80℃, reacted for 4-6 hours, cooled to 22±3℃, and the pH was adjusted to neutral with sodium hydroxide solution to obtain modified sophorolipid. The weight ratio of sophorolipid to ethanolamine is 1:(1-3), and the weight ratio of sophorolipid to C is... 12 The weight ratio of the branched alkylbenzene sulfonic acid catalyst is 1:(0.1-0.2).

2. The surface cleaning agent composition for metal processed products according to claim 1, characterized in that: The sophorolipid is filtered through a gel filter layer before use.

3. The surface cleaning agent composition for metal processed products according to claim 1, characterized in that: The defoamer is a polyether-modified silicone oil defoamer.

4. A method for preparing a surface cleaning agent composition for metal processed products as described in any one of claims 1-3, characterized in that, Includes the following steps: Surfactant peptides and lysine are placed in water, mixed evenly, heated to a high temperature, reacted, cooled and cooled, and then rhamnolipid biosurfactant, sodium polyaspartate, sodium oxalate, defoamer, and complex are added and mixed evenly to obtain a cleaning agent composition.

5. A method of using the surface cleaning agent composition for metal processed products as described in any one of claims 1-3, characterized in that, The process includes the following steps: diluting the composition, heating it to a certain temperature, immersing it in the metalwork, cleaning, and rinsing to remove the oil stains.

Images