Environment-friendly efficient alkalescent aluminum alloy degreasing treatment reagent and preparation and use method thereof

Abstract

The invention relates to an environment-friendly and efficient alkalescent aluminum alloy degreasing agent and a preparation and use method thereof. The nano alkaline oxide with phosphate radicals loaded on the surface is added to serve as a nano regulator, an oxide core of the nano alkaline oxide can catalyze decomposition of grease in the degreasing process, and meanwhile the phosphate radicals on the surface have the effects of regulating the pH in the degreasing process, promoting uniform dispersion of the grease and inhibiting corrosion of aluminum alloy under the alkaline condition; in addition, the preparation method is simple, the used nano regulator can be recycled, the use cost is reduced, phosphate radicals do not fall off in the use process, waste liquid does not contain elements such as phosphorus, nitrogen and boron, and safety and environment friendliness are achieved.

Description

Technical Field

[0001] The present invention relates to the field of material technology, and in particular to an environmentally friendly and efficient weakly alkaline aluminum alloy degreasing treatment reagent and a preparation and use method thereof. Background Art

[0002] Before anodizing aluminum alloy, it is necessary to degrease the aluminum alloy to ensure the dyeing quality of the workpiece. However, existing degreasing agents have some disadvantages:

[0003] Currently, most degreasing agents contain elements such as phosphorus, nitrogen, and boron, which can pollute the environment when discharged, especially causing problems such as eutrophication in water bodies. Secondly, some degreasing agents are highly acidic and alkaline, which is not only harmful to the environment, but also corrosive to the aluminum alloy material itself. Strongly acidic or alkaline degreasing agents may damage the surface of aluminum alloys, affecting the durability and performance of the material, and further affecting the quality and adhesion of the anodized film. Although weakly acidic and alkaline degreasing agents have less impact on the environment and materials, their degreasing effect is often poor and it is difficult to meet the high cleanliness requirements in industrial production. This may lead to uneven film layer during the anodizing process, affecting the appearance and performance of the product.

[0004] To address the problems currently faced by degreasing agents, various solutions have been proposed in existing patents and literature. For example, patent number CN114606508A uses ionic liquids for degreasing, eliminating the need for acid or alkali and avoiding the emission of toxic and hazardous substances. However, ionic liquids are expensive and can decompose and lose value over long-term use, making them unsuitable for industrial scale-up and continuous production. Patent number CN107779889A uses carbonates to provide alkalinity to prevent excessive alkalinity in the degreasing solution. The formula contains no pollutants such as phosphorus and boron, and the addition of surfactants, citrate buffers, and corrosion inhibitors to the degreasing process ensures high degreasing efficiency and low aluminum alloy corrosion. However, this degreasing agent cannot be recycled, resulting in wastewater treatment costs. Furthermore, since phosphates are not added, more expensive citrates and surfactants are required to compensate for their effects, resulting in high overall costs. Therefore, this patent proposes a recyclable, low-cost, and easily scalable environmentally friendly degreasing solution and its preparation method. Summary of the Invention

[0005] The main purpose of the present invention is to solve the problems of large pollution, poor degreasing effect and non-recyclability of conventional degreasing liquid in the prior art, thereby providing an environmentally friendly and efficient degreasing agent and a preparation method thereof. Nano-alkaline oxides with phosphate groups loaded on the surface are used as nano-regulators to catalyze the decomposition of oils and fats during the degreasing process. At the same time, the phosphate groups on the surface play a role in regulating the pH of the degreasing process, promoting the uniform dispersion of oils and fats, and inhibiting the corrosion of aluminum alloys under alkaline conditions. The preparation method of the present invention is simple, the nano-regulator used is recyclable, the waste liquid does not contain elements such as phosphorus, nitrogen and boron, is safe and environmentally friendly, and is suitable for large-scale industrial production.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions.

[0007] The first aspect of the present invention provides a degreasing agent, characterized in that the weight percentages of the constituent raw materials are:

[0008]

[0009]

[0010] Preferably, the carbonate is one or more of sodium carbonate, potassium carbonate, sodium bicarbonate, and potassium bicarbonate.

[0011] Preferably, the preparation method of the nano-regulator is:

[0012] S01: Dissolve the metal salt in a solvent, slowly add a precipitant and continue stirring to form a white sol; dry the sol in an oven and grind it to obtain primary precursor particles;

[0013] S02: Add the primary precursor particles into a strong acid solution for pretreatment, filter and wash to obtain the secondary precursor

[0014] S03: adding the secondary precursor to water, adding a surface modifier and a dispersant, and adjusting the pH before performing a hydrothermal treatment; filtering and drying the treated material to obtain a nano-regulator.

[0015] Preferably, the metal salt is selected from one or more of acetate, nitrate, chloride, sulfate and formates of calcium, zinc, magnesium and aluminum.

[0016] Preferably, the solvent is one or more of water, ethanol and methanol.

[0017] Preferably, the precipitant is one or more of sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, sodium bicarbonate, ammonium bicarbonate, and ammonia water.

[0018] Preferably, the primary precursor drying condition is baking at 80-120° C. for 6-20 hours.

[0019] Preferably, the strong acid solution is one or more of sulfuric acid, hydrochloric acid, nitric acid, formic acid, and acetic acid.

[0020] Preferably, the pretreatment time is 0.2-2 h, more preferably, the treatment time is 0.5-1 h.

[0021] Preferably, the surface modifier is one or more of phosphoric acid, sodium phosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate, ammonium phosphate, diammonium hydrogen phosphate, ammonium dihydrogen phosphate, sodium tripolyphosphate, sodium pyrophosphate, methyl phosphate, ethyl phosphate, and phosphorylcholine.

[0022] Preferably, the amount of the surface modifier is such that the ratio of the amount of phosphorus element substance in the modifier to the amount of oxide precursor substance is 0.05%-2%, more preferably, the amount is 0.1-1%.

[0023] Preferably, the dispersant is one or more of polyethylene glycol, chitosan, sodium alginate, polyethylene glycol, sodium lauryl sulfate, and polyacrylamide.

[0024] Preferably, the pH value before hydrothermal treatment is adjusted to 4-7.

[0025] Preferably, the hydrothermal condition is 60-120° C. for 8-24 hours.

[0026] Preferably, the nano-conditioner is dried at 80-110° C. for 2-10 hours.

[0027] A second aspect of the present invention provides a method for preparing the above-mentioned degreasing agent, comprising the following steps:

[0028] The various components are mixed according to a set formula to obtain the high-efficiency and environmentally friendly degreasing agent.

[0029] The third aspect of the present invention is a method for using the above-mentioned degreasing agent, comprising the following steps:

[0030] S01: dilute the degreasing agent with water to prepare a working solution, and place the aluminum alloy material to be degreased into the working solution for treatment;

[0031] S02: filtering the treated waste working fluid, and calcining the obtained filter residue to recover the nano-regulator;

[0032] Preferably, the dilution ratio is 1:15-1:40 of degreasing agent to water.

[0033] Preferably, the treatment time is 1-5 minutes.

[0034] Preferably, the treatment temperature is 20-60°C.

[0035] Preferably, the calcination temperature is 150-300°C.

[0036] Preferably, the calcination time is 5-20 minutes.

[0037] The present invention has the following beneficial effects compared to the prior art:

[0038] (1) The present invention uses phosphate-modified metal oxides as nano-regulators, which have the following functions: 1. Alkaline metal oxide nanoparticles can act as catalysts to promote alkaline hydrolysis of oils and fats, and can achieve high degreasing efficiency even in the absence of strong acid or alkali conditions; 2. Similar to the role of phosphates in phosphorus-containing degreasing agents, the phosphates on the surface of the oxide particles can act as buffers to adjust the pH of the degreasing process, form hydrogen bonds with oils and fats to promote uniform dispersion of oils and fats, and adhere to the surface of aluminum alloys to inhibit corrosion of aluminum alloys under alkaline conditions. However, unlike polluting phosphorus-containing degreasing agents, the oxide particles have numerous hydroxyl groups on their surfaces after strong acid pretreatment, which can strongly bind to phosphorus-containing compounds, anchoring phosphates on the surface of nano-oxide particles, thus preventing phosphorus from entering the wastewater and causing environmental pollution; 3. The metal oxide nanoparticles modified with phosphates have a stable structure and are resistant to high temperatures. They can be recycled and reused by simple filtration and sintering, saving costs.

[0039] (2) In addition, the preparation method of the present invention is simple, and a degreasing liquid can be obtained by simple preparation. Moreover, the degreasing liquid prepared by the present invention has excellent degreasing effect, is non-corrosive, and does not produce pollutants such as phosphorus, nitrogen, and boron. It has great practical value and is suitable for industrial large-scale production. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the following examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0041] Example 1

[0042] An environmentally friendly and efficient degreasing liquid, the preparation method of which comprises the following steps:

[0043] The preparation method is prepared by mixing sodium carbonate, fatty alcohol polyoxyethylene ether, sodium lauryl sulfate, nano-regulator, polyethylene glycol and water in proportions of 10%, 15%, 15%, 8%, 2% and 50%.

[0044] Wherein, the synthesis conditions of the nano-regulator are as follows:

[0045] S01: Dissolve magnesium acetate in water, slowly add ammonia water and continue stirring to form a white sol; dry the sol in an oven at 80°C for 10 hours and grind to obtain primary precursor particles;

[0046] S02: Add the primary precursor particles into sulfuric acid solution for pretreatment, filter and wash to obtain the secondary precursor

[0047] S03: Add the secondary precursor to water, add sodium dihydrogen phosphate and polyethylene glycol, adjust the pH to 6.5, and then perform hydrothermal treatment at a hydrothermal temperature of 100°C for 12 hours; filter the treated material and dry it at 80°C for 6 hours to obtain a nano-regulator.

[0048] The degreasing agent was diluted with water to prepare a working solution at a ratio of 1:20. The aluminum alloy material to be degreased was placed in the working solution and treated at 25°C for 2 minutes. The degreasing rate and corrosion degree of the aluminum alloy workpiece were tested and evaluated.

[0049] The treated waste working fluid is filtered, and the obtained filter residue is calcined at 150°C for 10 minutes to recover the nano-regulator, and the filtrate is subjected to elemental testing to determine the phosphorus content.

[0050] Example 2

[0051] An environmentally friendly and efficient degreasing liquid, the preparation method of which comprises the following steps:

[0052] The preparation method is prepared by mixing sodium carbonate, fatty alcohol polyoxyethylene ether, sodium lauryl sulfate, nano-regulator, polyethylene glycol and water in the proportions of 15%, 15%, 15%, 8%, 2% and 45%.

[0053] Wherein, the synthesis conditions of the nano-regulator are as follows:

[0054] S01: Dissolve magnesium acetate in water, slowly add ammonia water and continue stirring to form a white sol; dry the sol in an oven at 80°C for 10 hours and grind to obtain primary precursor particles;

[0055] S02: Add the primary precursor particles into sulfuric acid solution for pretreatment, filter and wash to obtain the secondary precursor

[0056] S03: Add the secondary precursor to water, add sodium dihydrogen phosphate and polyethylene glycol, adjust the pH to 6.5, and then perform hydrothermal treatment at a hydrothermal temperature of 100°C for 12 hours; filter the treated material and dry it at 80°C for 6 hours to obtain a nano-regulator.

[0057] The degreasing agent was diluted with water to prepare a working solution at a ratio of 1:20. The aluminum alloy material to be degreased was placed in the working solution and treated at 25°C for 2 minutes. The degreasing rate and corrosion degree of the aluminum alloy workpiece were tested and evaluated.

[0058] The treated waste working fluid is filtered, and the obtained filter residue is calcined at 150°C for 10 minutes to recover the nano-regulator, and the filtrate is subjected to elemental testing to determine the phosphorus content.

[0059] Example 3

[0060] An environmentally friendly and efficient degreasing liquid, the preparation method of which comprises the following steps:

[0061] The preparation method is prepared by mixing sodium carbonate, fatty alcohol polyoxyethylene ether, sodium lauryl sulfate, nano-regulator, polyethylene glycol and water in the proportions of 10%, 15%, 15%, 10%, 2% and 48%.

[0062] Wherein, the synthesis conditions of the nano-regulator are as follows:

[0063] S01: Dissolve magnesium acetate in water, slowly add ammonia water and continue stirring to form a white sol; dry the sol in an oven at 80°C for 10 hours and grind to obtain primary precursor particles;

[0064] S02: Add the primary precursor particles into sulfuric acid solution for pretreatment, filter and wash to obtain the secondary precursor

[0065] S03: Add the secondary precursor to water, add sodium dihydrogen phosphate and polyethylene glycol, adjust the pH to 6.5, and then perform hydrothermal treatment at a hydrothermal temperature of 100°C for 12 hours; filter the treated material and dry it at 80°C for 6 hours to obtain a nano-regulator.

[0066] The degreasing agent was diluted with water to prepare a working solution at a ratio of 1:20. The aluminum alloy material to be degreased was placed in the working solution and treated at 25°C for 2 minutes. The degreasing rate and corrosion degree of the aluminum alloy workpiece were tested and evaluated.

[0067] The treated waste working fluid is filtered, and the obtained filter residue is calcined at 150°C for 10 minutes to recover the nano-regulator, and the filtrate is subjected to elemental testing to determine the phosphorus content.

[0068] Example 4

[0069] An environmentally friendly and efficient degreasing liquid, the preparation method of which comprises the following steps:

[0070] The preparation method is prepared by mixing sodium carbonate, fatty alcohol polyoxyethylene ether, sodium lauryl sulfate, nano-regulator, polyethylene glycol and water in proportions of 10%, 15%, 15%, 8%, 2% and 50%.

[0071] Wherein, the synthesis conditions of the nano-regulator are as follows:

[0072] S01: Calcium chloride was dissolved in water, and sodium hydroxide was slowly added with continuous stirring to form a white sol; the sol was dried in an oven at 80°C for 10 h and ground to obtain primary precursor particles;

[0073] S02: Add the primary precursor particles into hydrochloric acid solution for pretreatment, filter and wash to obtain the secondary precursor

[0074] S03: Add the secondary precursor to water, add sodium tripolyphosphate and polyethylene glycol, adjust the pH to 6.5, and then perform hydrothermal treatment at a hydrothermal temperature of 100°C for 12 hours; filter the treated material and dry it at 80°C for 6 hours to obtain a nano-regulator.

[0075] The degreasing agent was diluted with water to prepare a working solution at a ratio of 1:20. The aluminum alloy material to be degreased was placed in the working solution and treated at 25°C for 2 minutes. The degreasing rate and corrosion degree of the aluminum alloy workpiece were tested and evaluated.

[0076] The treated waste working fluid is filtered, and the obtained filter residue is calcined at 150°C for 10 minutes to recover the nano-regulator, and the filtrate is subjected to elemental testing to determine the phosphorus content.

[0077] Example 5

[0078] An environmentally friendly and efficient degreasing liquid, the preparation method of which comprises the following steps:

[0079] The preparation method is prepared by mixing sodium carbonate, fatty alcohol polyoxyethylene ether, sodium lauryl sulfate, nano-regulator, polyethylene glycol and water in proportions of 10%, 15%, 15%, 8%, 2% and 50%.

[0080] Wherein, the synthesis conditions of the nano-regulator are as follows:

[0081] S01: Dissolve magnesium acetate in water, slowly add ammonia water and continue stirring to form a white sol; dry the sol in an oven at 80°C for 10 hours and grind to obtain primary precursor particles;

[0082] S02: Add the primary precursor particles into sulfuric acid solution for pretreatment, filter and wash to obtain the secondary precursor

[0083] S03: Add the secondary precursor to water, add sodium dihydrogen phosphate and polyethylene glycol, adjust the pH to 6.5, and then perform hydrothermal treatment at a hydrothermal temperature of 100°C for 12 hours; filter the treated material and dry it at 80°C for 6 hours to obtain a nano-regulator.

[0084] The degreasing agent was diluted with water to prepare a working solution at a ratio of 1:15. The aluminum alloy material to be degreased was placed in the working solution and treated at 25°C for 2 minutes. The degreasing rate and corrosion degree of the aluminum alloy workpiece were tested and evaluated.

[0085] The treated waste working fluid is filtered, and the obtained filter residue is calcined at 150°C for 10 minutes to recover the nano-regulator, and the filtrate is subjected to elemental testing to determine the phosphorus content.

[0086] Example 6

[0087] An environmentally friendly and efficient degreasing liquid, the preparation method of which comprises the following steps:

[0088] The preparation method is prepared by mixing sodium carbonate, fatty alcohol polyoxyethylene ether, sodium lauryl sulfate, nano-regulator, polyethylene glycol and water in proportions of 10%, 15%, 15%, 8%, 2% and 50%.

[0089] Wherein, the synthesis conditions of the nano-regulator are as follows:

[0090] S01: Dissolve magnesium acetate in water, slowly add ammonia water and continue stirring to form a white sol; dry the sol in an oven at 80°C for 10 hours and grind to obtain primary precursor particles;

[0091] S02: Add the primary precursor particles into sulfuric acid solution for pretreatment, filter and wash to obtain the secondary precursor

[0092] S03: Add the secondary precursor to water, add sodium dihydrogen phosphate and polyethylene glycol, adjust the pH to 6.5, and then perform hydrothermal treatment at a hydrothermal temperature of 100°C for 12 hours; filter the treated material and dry it at 80°C for 6 hours to obtain a nano-regulator.

[0093] The degreasing agent was diluted with water to prepare a working solution at a ratio of 1:20. The aluminum alloy material to be degreased was placed in the working solution and treated at 45°C for 4 minutes. The degreasing rate and corrosion degree of the aluminum alloy workpiece were tested and evaluated.

[0094] The treated waste working fluid was filtered, and the obtained filter residue was calcined at 150°C for 10 minutes to recover the nano-regulator, and the filtrate was subjected to elemental testing to determine the phosphorus content; Comparative Example 1

[0095] An environmentally friendly and efficient degreasing liquid, the preparation method of which comprises the following steps:

[0096] The preparation method is prepared by mixing sodium carbonate, fatty alcohol polyoxyethylene ether, sodium lauryl sulfate, nano-regulator, polyethylene glycol and water in proportions of 20%, 15%, 15%, 8%, 2% and 40%.

[0097] Wherein, the synthesis conditions of the nano-regulator are as follows:

[0098] S01: Dissolve magnesium acetate in water, slowly add ammonia water and continue stirring to form a white sol; dry the sol in an oven at 80°C for 10 hours and grind to obtain primary precursor particles;

[0099] S02: Add the primary precursor particles into sulfuric acid solution for pretreatment, filter and wash to obtain the secondary precursor

[0100] S03: Add the secondary precursor to water, add sodium dihydrogen phosphate and polyethylene glycol, adjust the pH to 6.5, and then perform hydrothermal treatment at a hydrothermal temperature of 100°C for 12 hours; filter the treated material and dry it at 80°C for 6 hours to obtain a nano-regulator.

[0101] The degreasing agent was diluted with water to prepare a working solution at a ratio of 1:20. The aluminum alloy material to be degreased was placed in the working solution and treated at 25°C for 2 minutes. The degreasing rate and corrosion degree of the aluminum alloy workpiece were tested and evaluated.

[0102] The treated waste working fluid was filtered, and the obtained filter residue was calcined at 150°C for 10 minutes to recover the nano-regulator, and the filtrate was subjected to elemental testing to determine the phosphorus content; Comparative Example 2

[0103] An environmentally friendly and efficient degreasing liquid, the preparation method of which comprises the following steps:

[0104] The preparation method is prepared by mixing sodium carbonate, fatty alcohol polyoxyethylene ether, sodium lauryl sulfate, nanometer regulator, polyethylene glycol and water in the proportions of 10%, 15%, 15%, 0%, 2% and 58%.

[0105] Wherein, the synthesis conditions of the nano-regulator are as follows:

[0106] S01: Dissolve magnesium acetate in water, slowly add ammonia water and continue stirring to form a white sol; dry the sol in an oven at 80°C for 10 hours and grind to obtain primary precursor particles;

[0107] S02: Add the primary precursor particles into sulfuric acid solution for pretreatment, filter and wash to obtain the secondary precursor

[0108] S03: Add the secondary precursor to water, add sodium dihydrogen phosphate and polyethylene glycol, adjust the pH to 6.5, and then perform hydrothermal treatment at a hydrothermal temperature of 100°C for 12 hours; filter the treated material and dry it at 80°C for 6 hours to obtain a nano-regulator.

[0109] The degreasing agent was diluted with water to prepare a working solution at a ratio of 1:20. The aluminum alloy material to be degreased was placed in the working solution and treated at 25°C for 2 minutes. The degreasing rate and corrosion degree of the aluminum alloy workpiece were tested and evaluated.

[0110] The treated waste working fluid was filtered, and the obtained filter residue was calcined at 150°C for 10 minutes to recover the nano-regulator, and the filtrate was subjected to elemental testing to determine the phosphorus content; Comparative Example 3

[0111] An environmentally friendly and efficient degreasing liquid, the preparation method of which comprises the following steps:

[0112] The preparation method is prepared by mixing sodium carbonate, fatty alcohol polyoxyethylene ether, sodium lauryl sulfate, nano-regulator, polyethylene glycol and water in proportions of 10%, 15%, 15%, 8%, 2% and 50%.

[0113] Wherein, the synthesis conditions of the nano-regulator are as follows:

[0114] S01: Dissolve magnesium acetate in water, slowly add ammonia water and continue stirring to form a white sol; dry the sol in an oven at 80°C for 10 hours and grind to obtain primary precursor particles;

[0115] S02: Add the primary precursor into water, add sodium dihydrogen phosphate and polyethylene glycol, adjust the pH to 6.5, and then perform hydrothermal treatment at a hydrothermal temperature of 100°C for 12 hours; filter the treated material and dry it at 80°C for 6 hours to obtain a nano-regulator.

[0116] The degreasing agent was diluted with water to prepare a working solution at a ratio of 1:20. The aluminum alloy material to be degreased was placed in the working solution and treated at 25°C for 2 minutes. The degreasing rate and corrosion degree of the aluminum alloy workpiece were tested and evaluated.

[0117] The treated waste working fluid was filtered, and the obtained filter residue was calcined at 150°C for 10 minutes to recover the nano-regulator, and the filtrate was subjected to elemental testing to determine the phosphorus content; Comparative Example 4

[0118] An environmentally friendly and efficient degreasing liquid, the preparation method of which comprises the following steps:

[0119] The preparation method is prepared by mixing sodium carbonate, fatty alcohol polyoxyethylene ether, sodium lauryl sulfate, nano-regulator, polyethylene glycol and water in proportions of 10%, 15%, 15%, 8%, 2% and 50%.

[0120] Wherein, the synthesis conditions of the nano-regulator are as follows:

[0121] S01: Dissolve magnesium acetate in water, slowly add ammonia water and continue stirring to form a white sol; dry the sol in an oven at 80°C for 10 hours and grind to obtain primary precursor particles;

[0122] S02: Add the primary precursor particles into sulfuric acid solution for pretreatment, filter and wash to obtain the secondary precursor

[0123] S03: Add the secondary precursor to water, add sodium dihydrogen phosphate and polyethylene glycol, adjust the pH to 8, and then perform hydrothermal treatment at a temperature of 100°C for 12 hours; filter the treated material and dry it at 80°C for 6 hours to obtain a nano-regulator.

[0124] The degreasing agent was diluted with water to prepare a working solution at a ratio of 1:20. The aluminum alloy material to be degreased was placed in the working solution and treated at 25°C for 2 minutes. The degreasing rate and corrosion degree of the aluminum alloy workpiece were tested and evaluated.

[0125] The treated waste working fluid was filtered, and the obtained filter residue was calcined at 150°C for 10 minutes to recover the nano-regulator, and the filtrate was subjected to elemental testing to determine the phosphorus content; Comparative Example 5

[0126] An environmentally friendly and efficient degreasing liquid, the preparation method of which comprises the following steps:

[0127] The preparation method is prepared by mixing sodium carbonate, fatty alcohol polyoxyethylene ether, sodium lauryl sulfate, nano-regulator, polyethylene glycol and water in proportions of 10%, 15%, 15%, 8%, 2% and 50%.

[0128] Wherein, the synthesis conditions of the nano-regulator are as follows:

[0129] S01: dissolving magnesium acetate in water, slowly adding ammonia water and continuously stirring to form a white sol; drying the sol in an oven at 80°C for 10 hours, and grinding to obtain nano-regulator particles;

[0130] The degreasing agent was diluted with water to prepare a working solution at a ratio of 1:10. The aluminum alloy material to be degreased was placed in the working solution and treated at 25°C for 2 minutes. The degreasing rate and corrosion degree of the aluminum alloy workpiece were tested and evaluated.

[0131] The treated waste working fluid was filtered, and the obtained filter residue was calcined at 150°C for 10 minutes to recover the nano-regulator, and the filtrate was subjected to elemental testing to determine the phosphorus content; Comparative Example 6

[0132] A conventional degreasing liquid comprises the following preparation steps:

[0133] The preparation method is prepared by mixing sodium hydroxide, triethanolamine, nonylphenol polyoxyethylene ether, lauryl alcohol amide phosphate, isooctyl alcohol polyoxyethylene ether, sodium methylene bis(methylbenzenesulfonate), sodium carboxymethyl cellulose and deionized water in proportions of 10%, 15%, 3%, 2%, 5%, 2%, 1% and 62%.

[0134] The aluminum alloy material to be degreased was placed in a degreasing solution at 25°C for 2 minutes, and the degreasing rate and corrosion degree of the aluminum alloy workpiece were tested and evaluated;

[0135] The treated waste working fluid was filtered, and the obtained filter residue was calcined at 150°C for 10 minutes to recover the nano-regulator, and the filtrate was subjected to elemental testing to determine the phosphorus content; Verification Example 1

[0136] Aluminum alloy workpieces treated in Examples 1-6 and Comparative Examples 1-6 were tested for degreasing efficiency and corrosion severity. The treated and filtered waste working fluids were also tested for phosphorus content. These tests were performed using conventional methods and equipment in the art. The results are shown in Table 1 below.

[0137] Table 1 Physical and chemical property test results of Examples 1-6 and Comparative Examples 1-6

[0138]

[0139]

[0140] As can be seen from the above results, the degreasing agent material prepared by the embodiment of the present invention, no matter it is degreasing rate, corrosiveness to aluminum alloy, the phosphorus content of waste liquid is significantly better than comparative example. Its main reason is that the present invention innovatively adds the nanometer alkaline oxide of surface-loaded phosphate radical as nanometer regulator, its oxide kernel can be in catalytic degreasing process The decomposition of grease, while the phosphate radical on the surface plays the role of regulating degreasing process pH, promoting the uniform dispersion of grease, suppressing the corrosion of aluminum alloy under alkaline conditions;In addition, preparation method of the present invention is simple, and the nanometer regulator used is recyclable, reduces use cost, and phosphate radical does not fall off during use, and waste liquid does not contain elements such as phosphorus, nitrogen, boron, and is safe and environmentally friendly.

[0141] The material ratio in the degreasing agent prepared in Comparative Example 1 does not meet the specified conditions, the prepared degreasing agent has too strong alkalinity, and the degree of corrosion of its aluminum alloy is significantly stronger than that of the embodiment; the degreasing agent prepared in Comparative Example 2 does not add a nano-regulator, resulting in its aluminum alloy degreasing efficiency being significantly lower than that of the embodiment; the synthesis of the nano-regulator in Comparative Example 3 does not undergo the second step of strong acid pretreatment, resulting in insufficient tight binding of the phosphate group and the oxide particles, and thus the phosphate group is easily detached during the degreasing process, the degreasing efficiency is reduced, and the phosphorus content in the waste liquid is high; the hydrothermal pH of the nano-regulator in Comparative Example 4 is not within the specified conditions, the same as Comparative Example 3, the phosphate group is not fully bound to the oxide particles, and thus the phosphate group is easily detached during the degreasing process, the degreasing efficiency is reduced, and the phosphorus content in the waste liquid is high; in Comparative Example 5, the surface of the oxide particles is not modified with phosphate, resulting in a decrease in its degreasing efficiency, and the aluminum alloy is more obviously corroded without phosphate protection; Comparative Example 6 uses a conventional method to prepare a degreasing agent, which has strong alkalinity and is highly corrosive to aluminum alloy materials, and the waste liquid contains a large amount of phosphorus.

[0142] The above detailed description of the analytical methods involved in the present invention provides a detailed introduction. It should be noted that the above description is intended solely to help those skilled in the art better understand the methods and concepts of the present invention, and is not intended to limit the relevant content. Without departing from the principles of the present invention, those skilled in the art may make appropriate adjustments or modifications to the present invention, and such adjustments and modifications shall also fall within the scope of protection of the present invention.

Claims

1. A degreasing agent, characterized in that The weight percentages of the constituent raw materials are:

2. The degreasing agent according to claim 1, characterized in that The carbonate is one or more of sodium carbonate, potassium carbonate, sodium bicarbonate and potassium bicarbonate.

3. The degreasing agent according to claim 1, characterized in that The preparation method of the nano-regulator comprises the following steps: The metal salt is dissolved in a solvent, and a precipitant is slowly added with continuous stirring to form a white sol; the sol is dried in an oven and ground to obtain primary precursor particles; the primary precursor particles are added to a strong acid solution for pretreatment, and filtered and washed to obtain a secondary precursor; the secondary precursor is added to water, and a surface modifier and a dispersant are added, and the pH is adjusted before hydrothermal treatment; The treated material is filtered and dried to obtain the nano-regulator.

4. The nano-conditioning agent according to claim 3, characterized in that The metal salt is selected from one or more of acetate, nitrate, chloride, sulfate and formates of calcium, zinc, magnesium and aluminum.

5. The nano-conditioning agent according to claim 3, characterized in that The surface modifier is one or more of phosphoric acid, sodium phosphate, disodium hydrogen phosphate, sodium dihydrogen phosphate, ammonium phosphate, diammonium hydrogen phosphate, ammonium dihydrogen phosphate, sodium tripolyphosphate, sodium pyrophosphate, methyl phosphate, ethyl phosphate, and phosphorylcholine.

6. The nano-conditioning agent according to claim 3, characterized in that The amount of the surface modifier is such that the ratio of the amount of phosphorus element substance in the modifier to the amount of oxide precursor substance is 0.05%-2%, more preferably, the amount is 0.1-1%.

7. The method for preparing a degreasing agent according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: mixing the components according to a set formula to obtain the high-efficiency and environmentally friendly degreasing agent.

8. The method for using the degreasing agent according to any one of claims 1 to 6, comprising the following steps: S01: dilute the degreasing agent with water to prepare a working solution, and place the aluminum alloy material to be degreased into the working solution for treatment; S02: filtering the treated waste working fluid, and calcining the obtained filter residue to recover the nano-regulator.

9. The method of use according to claim 8, characterized in that: The dilution ratio is 1:15-1:40 of degreasing agent to water, the treatment time is 1-5 minutes, and the treatment temperature is 20-60°C.

10. The method of use according to claim 8, characterized in that: The calcination temperature is 150-300° C., and the calcination time is 5-20 minutes.

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