Degreasing agent for zirconium tube rolling and preparation method thereof

Abstract

The invention provides an oil removing agent for zirconium tube rolling and a preparation method thereof. The oil removing agent comprises the following components in parts by mass: 20-60 parts of an oil removing main agent, 3-8 parts of a chelating stabilizer, 8-23 parts of a surfactant, 2-10 parts of a corrosion inhibitor, 0.1-1 part of a defoaming agent, 2-10 parts of a bactericide, 1-5 parts of a pH regulator and 880-950 parts of deionized water. The degreasing agent is excellent in cleaning and degreasing effect, simple in degreasing operation and good in product adaptability, is particularly suitable for degreasing rolled zirconium pipes and other zirconium materials, can also be used for degreasing rolled materials of metals such as titanium with similar characteristics to the zirconium materials, and has a wide application prospect; and the preparation process is simple and easy to operate.

Description

Technical Field

[0001] The invention belongs to the technical field of cleaning agent preparation, and in particular, relates to a degreasing agent for zirconium tube rolling and a preparation method thereof. Background Art

[0002] Degreasing agent is a complex mixture of organic and inorganic chemicals with water as the matrix and carrier. It is widely used in metal processing, food, textile, transportation, shipbuilding, construction, electrical appliances, medicine, chemical industry and other industrial fields. Although the surface substrates for degreasing cleaning are different, the purpose of cleaning is the same, which is to restore the cleanliness of the substrate surface and maintain the integrity of the substrate surface.

[0003] Degreasers are mainly made of alkaline substances, surfactants and other additives, and are a type of liquid cleaning agent. Compared with traditional solvent-based cleaning agents and acidic cleaning agents, degreasers are simpler and more convenient to prepare and use, and are safe and reliable without the risk of being flammable or explosive. Degreaser systems are usually weakly alkaline, generally do not corrode machines and equipment, and are also operator-friendly. In addition, degreasers have good permeability and cleaning effects on grease, stains, oil stains, and rust stains of various components, making degreasers a very widely used cleaning agent.

[0004] Zirconium tube is a tubular material made of metal zirconium by rolling. It has the characteristics of high strength, corrosion resistance, thermal stability and low thermal expansion coefficient. It is widely used in the fields of nuclear industry, aerospace, etc. The formed zirconium tube is commonly cold-rolled by a pilger mill. During the rolling process, the inner and outer walls of the tube are coated with lubricant or continuously sprayed with lubricant to prevent the occurrence of undesirable phenomena such as excessive or low roughness, scratching the mandrel, and adhesion during the rolling process. Therefore, after the rolling is completed, there is a layer of black oil on the inner and outer walls of the zirconium tube, which needs to be removed with a degreasing agent before entering the subsequent process. At present, there is no degreasing agent specifically for rolled zirconium tubes on the market. Due to the material properties of metal zirconium itself and the characteristics and physical and chemical properties of the rolling fluid used in the rolling process, the degreasing agent suitable for other metals such as steel, aluminum, copper, etc. after rolling is not completely suitable for rolled zirconium tubes.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the present invention provides a degreasing agent for zirconium tube rolling and a preparation method thereof.

[0007] In the first aspect, an embodiment of the present invention proposes a degreasing agent for zirconium tube rolling, comprising the following components in parts by weight: 20 to 60 parts of a degreasing main agent, 3 to 8 parts of a chelating stabilizer, 8 to 23 parts of a surfactant, 2 to 10 parts of a corrosion inhibitor, 0.1 to 1 part of a defoaming agent, 2 to 10 parts of a bactericide, 1 to 5 parts of a pH adjuster, and 880 to 950 parts of deionized water.

[0008] In some embodiments, the degreasing main agent includes 10 to 30 parts of sodium acetate and 10 to 30 parts of trisodium phosphate.

[0009] In some embodiments, the chelating stabilizer includes at least one of disodium ethylenediaminetetraacetate, tetrasodium ethylenediaminetetraacetate, ethylenediaminetetraacetic acid, citric acid, sodium citrate, oxalic acid, nitrilotriacetic acid, diethylenetriaminepentaacetic acid, and N-hydroxyethylethylaminetriacetic acid.

[0010] In some embodiments, the surfactant includes 1 to 3 parts of sodium dodecylbenzene sulfonate, 3 to 5 parts of sorbitan monooleate polyoxyethylene ether, 2 to 5 parts of sodium N-lauryl sarcosinate and 2 to 10 parts of fatty alcohol polyoxyethylene ester.

[0011] In some embodiments, the corrosion inhibitor includes at least one of sodium benzotriazole and hexamethylenetetramine.

[0012] In some embodiments, the defoaming agent includes at least one of methyl silicone oil, polyether-modified silicone oil, polyether-type defoaming agent, and non-silicon defoaming agent.

[0013] In some embodiments, the bactericide includes at least one of sodium benzoate and s-triazine.

[0014] In some embodiments, the pH adjuster includes at least one of sodium hydroxide, potassium hydroxide, and calcium hydroxide.

[0015] In a second aspect, an embodiment of the present invention further provides a method for preparing a degreasing agent for zirconium tube rolling as described in the first aspect, comprising the following steps:

[0016] (1) After heating 1 / 10 to 1 / 5 of the mass fraction of deionized water, add the degreasing agent, chelating stabilizer and surfactant, and stir to disperse;

[0017] (2) adding a corrosion inhibitor, a defoamer, and a bactericide to the dispersion obtained in step (1), and stirring and mixing;

[0018] (3) Add the remaining deionized water to the mixed solution obtained in step (2), stir and mix, and then add a pH adjuster and stir and mix to obtain the degreasing agent for zirconium tube rolling.

[0019] In some embodiments, in step (1), the heating temperature is 40 to 70° C.;

[0020] And / or, in step (3), a pH adjuster is added to adjust the pH value of the mixed solution to 11.5-12.5.

[0021] The embodiment of the present invention optimizes the formula composition of the degreasing agent, so that the obtained degreasing agent has the following advantages:

[0022] (1) Excellent cleaning and degreasing effect: the oil stains on the inner and outer walls of the rolled zirconium tube can be almost completely removed, ensuring that the tube is clean and free of oil stains;

[0023] (2) Good product adaptability: It has good cleaning effect on zirconium tubes rolled with biomass rolling fluid, mineral oil rolling fluid and synthetic oil rolling fluid, and is widely used;

[0024] (3) Simple degreasing operation: When the degreasing agent in the embodiment of the present invention is used to degreasing the zirconium tube, it only needs to be immersed at room temperature to complete the degreasing, thereby saving many operating steps and equipment investment, reducing energy consumption and labor intensity;

[0025] (4) Simple and convenient operation: The degreasing agent in the embodiment of the present invention is not a strong acid or strong alkaline system, and the preparation and operation are simple, which is very friendly to the on-site personnel;

[0026] (5) The degreasing agent in the embodiment of the present invention is a room temperature, low alkali, low foaming degreasing agent, which has great improvements on the on-site operating environment, occupational hygiene and subsequent waste liquid treatment, thereby reducing the cost and expenses of subsequent treatment. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below. The embodiments are exemplary and intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0028] Where values ​​are described herein as a range, it should be understood that such disclosure includes disclosure of all possible sub-ranges within that range, as well as specific values ​​falling within that range, regardless of whether a specific value or a specific sub-range is explicitly stated.

[0029] Herein, the words "comprises" and "includes" and variations thereof mean that other elements or integers which are permitted but not specifically described may be included.

[0030] In this article, the term "and / or" is merely a term used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0031] In the first aspect, an embodiment of the present invention proposes a degreasing agent for zirconium tube rolling, comprising the following components in parts by weight: 20 to 60 parts of a degreasing main agent, 3 to 8 parts of a chelating stabilizer, 8 to 23 parts of a surfactant, 2 to 10 parts of a corrosion inhibitor, 0.1 to 1 part of a defoaming agent, 2 to 10 parts of a bactericide, 1 to 5 parts of a pH adjuster, and 880 to 950 parts of deionized water.

[0032] In some embodiments, the degreasing agent includes 10 to 30 parts of sodium acetate (non-limiting examples: 10 parts, 15 parts, 20 parts, 25 parts, 30 parts, etc.) and 10 to 30 parts of trisodium phosphate (non-limiting examples: 10 parts, 18 parts, 20 parts, 25 parts, 30 parts, etc.). By compounding the two inorganic salts of sodium acetate and trisodium phosphate as the degreasing agent, it has a synergistic effect, can separate the lubricant remaining on the surface of the zirconium tube, as well as metal wear debris and lubricant oxidation products from the surface of the zirconium tube, and improve the degreasing cleaning effect.

[0033] In some embodiments, the chelating stabilizer includes at least one of disodium ethylenediaminetetraacetic acid, tetrasodium ethylenediaminetetraacetic acid, ethylenediaminetetraacetic acid, citric acid, sodium citrate, oxalic acid, nitrilotriacetic acid (NTA), diethylenetriaminepentaacetic acid (DTPA), and N-hydroxyethylethylaminetriacetic acid (HEDTA).

[0034] In some embodiments, the surfactant includes 1 to 3 parts of sodium dodecylbenzene sulfonate (non-limiting examples: 1 part, 2 parts, 3 parts, etc.), 3 to 5 parts of sorbitan monooleate polyoxyethylene ether (non-limiting examples: 3 parts, 4 parts, 5 parts, etc.), 2 to 5 parts of sodium N-lauryl sarcosinate (non-limiting examples: 2 parts, 3 parts, 4 parts, 5 parts, etc.) and 2 to 10 parts of fatty alcohol polyoxyethylene ester (non-limiting examples: 2 parts, 5 parts, 8 parts, 10 parts, etc.). By using the complex of sodium dodecylbenzene sulfonate, sorbitan monooleate polyoxyethylene ether, sodium N-lauryl sarcosinate and fatty alcohol polyoxyethylene ester as a surfactant, it has a good synergistic effect, can give the degreasing agent good wettability, dispersibility, emulsification, and material adaptability, and then penetrate, wet, emulsify, disperse, and clean the substances separated from the degreasing main agent, cooperate with the degreasing main agent to improve the degreasing effect and degreasing efficiency, and extend the use time of the degreasing agent. The composite surfactant cooperates with the degreasing main agent so that the obtained degreasing agent has good degreasing performance, can remove oil stains on the inner and outer walls of the zirconium tube by immersion at room temperature, and has a good cleaning effect on different types of rolling fluids.

[0035] In some embodiments, the corrosion inhibitor includes at least one of sodium benzotriazole and hexamethylenetetramine.

[0036] In some embodiments, the defoaming agent includes at least one of methyl silicone oil, polyether-modified silicone oil, polyether-type defoaming agent, and non-silicon defoaming agent.

[0037] In some embodiments, the bactericide includes at least one of sodium benzoate and s-triazine.

[0038] In some embodiments, the pH adjuster includes at least one of sodium hydroxide, potassium hydroxide, and calcium hydroxide.

[0039] By adding defoamers and pH regulators to the degreasing agent, it is possible to ensure that the degreasing system has low foaming and low alkalinity, which is beneficial to on-site degreasing operations and post-processing.

[0040] In a second aspect, an embodiment of the present invention further provides a method for preparing a degreasing agent for zirconium tube rolling as described in the first aspect, comprising the following steps:

[0041] (1) After heating 1 / 10 to 1 / 5 of the mass fraction of deionized water, add the degreasing agent, chelating stabilizer and surfactant, and stir to disperse;

[0042] (2) adding a corrosion inhibitor, a defoamer, and a bactericide to the dispersion obtained in step (1), and stirring and mixing;

[0043] (3) Add the remaining deionized water to the mixed solution obtained in step (2), stir and mix, and then add a pH adjuster and stir and mix to obtain the degreasing agent for zirconium tube rolling.

[0044] In the degreasing agent preparation method of the embodiment of the present invention, by mixing and dispersing different components of the degreasing agent in batches, the uniform dispersion of the degreasing agent can be better ensured, and the stirring and dispersing conditions of each component can be easily observed, while the accurate addition amount of each component can be ensured.

[0045] In some embodiments, in step (1), the heating temperature is 40-70° C., non-limiting examples include: 40° C., 50° C., 55° C., 60° C., 70° C., etc.;

[0046] And / or, in step (3), a pH adjuster is added to adjust the pH value of the mixed solution to 11.5-12.5, non-limiting examples include: 11.5, 11.8, 12.0, 12.1, 12.4, 12.5, etc.

[0047] The following are non-limiting examples and comparative examples of the present invention. It should be noted that the schemes of the comparative examples are not prior art and are only provided for comparison with the schemes of the embodiments and are not intended to limit the present invention. Unless otherwise specified, the various raw materials used in the embodiments and comparative examples are conventional commercial products or can be prepared by known methods.

[0048] Example 1

[0049] This embodiment provides a method for preparing a degreasing agent for zirconium tube rolling, comprising the following steps:

[0050] (1) After heating 200 parts of deionized water to 50° C., 30 parts of sodium acetate, 10 parts of trisodium phosphate, 5 parts of disodium ethylenediaminetetraacetate, 2 parts of sodium dodecylbenzenesulfonate, 5 parts of sorbitan monooleate polyoxyethylene ether, 3 parts of sodium N-lauryl sarcosinate and 5 parts of fatty alcohol polyoxyethylene ester were added in sequence, and stirred to ensure that the components were evenly dissolved;

[0051] (2) adding 5 parts of sodium benzotriazole, 1 part of non-silicon defoaming agent and 5 parts of sodium benzoate to the dispersion obtained in step (1), stirring and mixing to ensure that all components are dissolved evenly;

[0052] (3) Add 727 parts of deionized water to the mixed solution obtained in step (2), stir and mix, and then add 2 parts of sodium hydroxide to adjust the pH of the mixed solution to 12.1, thereby obtaining a degreasing agent for zirconium tube rolling.

[0053] Example 2

[0054] This embodiment provides a method for preparing a degreasing agent for zirconium tube rolling, comprising the following steps:

[0055] (1) After heating 200 parts of deionized water to 50° C., 30 parts of sodium acetate, 10 parts of trisodium phosphate, 5 parts of disodium ethylenediaminetetraacetate, 2 parts of sodium dodecylbenzenesulfonate, 2 parts of sorbitan monooleate polyoxyethylene ether, 3 parts of sodium N-lauryl sarcosinate and 8 parts of fatty alcohol polyoxyethylene ester were added in sequence, and stirred to ensure that the components were evenly dissolved;

[0056] (2) adding 5 parts of sodium benzotriazole, 1 part of non-silicon defoaming agent and 5 parts of sodium benzoate to the dispersion obtained in step (1), stirring and mixing to ensure that all components are dissolved evenly;

[0057] (3) Add 727 parts of deionized water to the mixed solution obtained in step (2), stir and mix, and then add 2 parts of sodium hydroxide to adjust the pH of the mixed solution to 12.0, thereby obtaining a degreasing agent for zirconium tube rolling.

[0058] Example 3

[0059] This embodiment provides a method for preparing a degreasing agent for zirconium tube rolling, comprising the following steps:

[0060] (1) After heating 200 parts of deionized water to 50° C., add 10 parts of sodium acetate, 30 parts of trisodium phosphate, 5 parts of disodium ethylenediaminetetraacetate, 2 parts of sodium dodecylbenzenesulfonate, 5 parts of sorbitan monooleate polyoxyethylene ether, 3 parts of sodium N-lauryl sarcosinate and 5 parts of fatty alcohol polyoxyethylene ester in sequence, and stir and disperse to ensure that each component is evenly dissolved;

[0061] (2) adding 5 parts of sodium benzotriazole, 1 part of non-silicon defoaming agent and 5 parts of sodium benzoate to the dispersion obtained in step (1), stirring and mixing to ensure that all components are dissolved evenly;

[0062] (3) Add 727 parts of deionized water to the mixed solution obtained in step (2), stir and mix, and then add 2 parts of sodium hydroxide to adjust the pH of the mixed solution to 12.4, thereby obtaining a degreasing agent for zirconium tube rolling.

[0063] Example 4

[0064] This embodiment provides a method for preparing a degreasing agent for zirconium tube rolling, comprising the following steps:

[0065] (1) After heating 200 parts of deionized water to 50° C., 30 parts of sodium acetate, 10 parts of trisodium phosphate, 5 parts of disodium ethylenediaminetetraacetate, 2 parts of sodium dodecylbenzenesulfonate, 5 parts of sorbitan monooleate polyoxyethylene ether, 3 parts of sodium N-lauryl sarcosinate and 5 parts of fatty alcohol polyoxyethylene ester were added in sequence, and stirred to ensure that the components were evenly dissolved;

[0066] (2) adding 5 parts of urotropine, 1 part of modified polyether defoamer and 5 parts of s-triazine to the dispersion obtained in step (1), stirring and mixing to ensure that all components are dissolved evenly;

[0067] (3) Add 727 parts of deionized water to the mixed solution obtained in step (2), stir and mix, and then add 2 parts of sodium hydroxide to adjust the pH of the mixed solution to 12.1, thereby obtaining a degreasing agent for zirconium tube rolling.

[0068] Comparative Example 1

[0069] This comparative example provides a method for preparing a degreasing agent for zirconium tube rolling, comprising the following steps:

[0070] (1) After heating 200 parts of deionized water to 50° C., 30 parts of sodium acetate, 10 parts of trisodium phosphate, 5 parts of disodium ethylenediaminetetraacetate, 2 parts of sodium dodecylbenzenesulfonate, 8 parts of sorbitan monooleate polyoxyethylene ether and 5 parts of sodium N-lauryl sarcosinate were added in sequence, and stirred and dispersed to ensure that each component was evenly dissolved;

[0071] (2) adding 5 parts of sodium benzotriazole, 1 part of non-silicon defoaming agent and 5 parts of sodium benzoate to the dispersion obtained in step (1), stirring and mixing to ensure that all components are dissolved evenly;

[0072] (3) Add 727 parts of deionized water to the mixed solution obtained in step (2), stir and mix, and then add 2 parts of sodium hydroxide to adjust the pH of the mixed solution to 11.9, thereby obtaining a degreasing agent for zirconium tube rolling.

[0073] Comparative Example 2

[0074] This comparative example provides a method for preparing a degreasing agent for zirconium tube rolling, comprising the following steps:

[0075] (1) After heating 200 parts of deionized water to 50° C., 30 parts of sodium acetate, 10 parts of trisodium phosphate, 5 parts of disodium ethylenediaminetetraacetate, 3 parts of sodium dodecylbenzenesulfonate, 5 parts of sodium N-lauryl sarcosinate and 7 parts of fatty alcohol polyoxyethylene ester were added in sequence, and stirred and dispersed to ensure that each component was evenly dissolved;

[0076] (2) adding 5 parts of sodium benzotriazole, 1 part of non-silicon defoaming agent and 5 parts of sodium benzoate to the dispersion obtained in step (1), stirring and mixing to ensure that all components are dissolved evenly;

[0077] (3) Add 727 parts of deionized water to the mixed solution obtained in step (2), stir and mix, and then add 2 parts of sodium hydroxide to adjust the pH of the mixed solution to 12.2 to obtain a degreasing agent for zirconium tube rolling.

[0078] Comparative Example 3

[0079] This comparative example provides a method for preparing a degreasing agent for zirconium tube rolling, comprising the following steps:

[0080] (1) After heating 200 parts of deionized water to 50° C., 30 parts of sodium acetate, 10 parts of trisodium phosphate, 5 parts of disodium ethylenediaminetetraacetate, 2 parts of sodium dodecylbenzenesulfonate, 8 parts of sorbitan monooleate polyoxyethylene ether and 5 parts of fatty alcohol polyoxyethylene ester were added in sequence, and stirred and dispersed to ensure that each component was evenly dissolved;

[0081] (2) adding 5 parts of sodium benzotriazole, 1 part of non-silicon defoaming agent and 5 parts of sodium benzoate to the dispersion obtained in step (1), stirring and mixing to ensure that all components are dissolved evenly;

[0082] (3) Add 727 parts of deionized water to the mixed solution obtained in step (2), stir and mix, and then add 2 parts of sodium hydroxide to adjust the pH of the mixed solution to 12.0, thereby obtaining a degreasing agent for zirconium tube rolling.

[0083] Comparative Example 4

[0084] (1) After heating 200 parts of deionized water to 50° C., 40 parts of sodium acetate, 5 parts of disodium ethylenediaminetetraacetate, 3 parts of sodium dodecylbenzenesulfonate, 5 parts of sodium N-lauryl sarcosinate and 7 parts of fatty alcohol polyoxyethylene ester were added in sequence, and stirred and dispersed to ensure that each component was evenly dissolved;

[0085] (2) adding 5 parts of sodium benzotriazole, 1 part of non-silicon defoaming agent and 5 parts of sodium benzoate to the dispersion obtained in step (1), stirring and mixing to ensure that all components are dissolved evenly;

[0086] (3) Add 726 parts of deionized water to the mixed solution obtained in step (2), stir and mix, and then add 3 parts of sodium hydroxide to adjust the pH of the mixed solution to 11.6, thereby obtaining a degreasing agent for zirconium tube rolling.

[0087] The main properties of the degreasing agents prepared in the above examples and comparative examples were tested, and the results are shown in Table 1.

[0088] Table 1

[0089]

[0090] Note: pH value: also known as acid-base value, is an index showing the "hydrogen ion concentration of a solution" and is a symbol used in chemistry to measure the acidity and alkalinity ratio of a liquid.

[0091] Degreasing effect: used to measure the degreasing agent's ability to remove various oil stains on the surface of the cleaning object. Different types of rolled zirconium tubes were placed in the degreasing agents prepared in the embodiments of the present invention and the comparative examples, and the degreasing effects were determined and compared by immersion at room temperature and subsequent cleaning.

[0092] Corrosion rate: refers to the weight loss of metal material per unit area per unit time after being immersed in degreasing agent. It is used to reflect the degree of corrosion of metal material by degreasing agent.

[0093] Foam height: Foam height is used to indicate the foam characteristics of the degreaser. The immediate height and the height after 5 minutes reflect the foaming and defoaming characteristics of the degreaser.

[0094] It can be concluded from the experimental data in Table 1 that: by comparing Example 2 with Example 1, it can be seen that only adjusting the dosage of certain surfactants will hardly affect the degreasing cleaning effect, corrosiveness and foam characteristics of the degreasing agent; by comparing Example 3 with Example 1, it can be seen that only adjusting the component ratio of the degreasing main agent while keeping the main component type unchanged has basically no effect on the degreasing cleaning effect, corrosiveness and foam characteristics of the degreasing agent; by comparing Example 4 with Example 1, it can be seen that only adjusting the types of corrosion inhibitors, defoamers and bactericides has basically no effect on the degreasing cleaning effect, corrosiveness and foam characteristics of the degreasing agent. In addition, by comparing Examples 1-4 with Comparative Examples 1-4, it can be seen that the degreasing agent prepared in the embodiments of the present invention has a better degreasing effect than the comparative examples.

[0095] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0096] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A degreasing agent for zirconium tube rolling, characterized in that: The invention comprises the following components in parts by weight: 20 to 60 parts of degreasing main agent, 3 to 8 parts of chelating stabilizer, 8 to 23 parts of surfactant, 2 to 10 parts of corrosion inhibitor, 0.1 to 1 part of defoaming agent, 2 to 10 parts of bactericide, 1 to 5 parts of pH adjusting agent and 880 to 950 parts of deionized water.

2. The degreasing agent for zirconium tube rolling according to claim 1, characterized in that: The degreasing main agent comprises 10 to 30 parts of sodium acetate and 10 to 30 parts of trisodium phosphate.

3. The degreasing agent for zirconium tube rolling according to claim 1, characterized in that: The chelating stabilizer includes at least one of disodium ethylenediaminetetraacetate, tetrasodium ethylenediaminetetraacetate, ethylenediaminetetraacetic acid, citric acid, sodium citrate, oxalic acid, nitrilotriacetic acid, diethylenetriaminepentaacetic acid, and N-hydroxyethylethylaminetriacetic acid.

4. The degreasing agent for zirconium tube rolling according to claim 1, characterized in that: The surfactant comprises 1 to 3 parts of sodium dodecylbenzene sulfonate, 3 to 5 parts of sorbitan monooleate polyoxyethylene ether, 2 to 5 parts of sodium N-lauryl sarcosinate and 2 to 10 parts of fatty alcohol polyoxyethylene ester.

5. The degreasing agent for zirconium tube rolling according to claim 1, characterized in that: The corrosion inhibitor includes at least one of sodium benzotriazole and hexamethylenetetramine.

6. The degreasing agent for zirconium tube rolling according to claim 1, characterized in that: The defoaming agent includes at least one of methyl silicone oil, polyether modified silicone oil, polyether defoaming agent and non-silicon defoaming agent.

7. The degreasing agent for zirconium tube rolling according to claim 1, characterized in that: The bactericide includes at least one of sodium benzoate and s-triazine.

8. The degreasing agent for zirconium tube rolling according to claim 1, characterized in that: The pH adjuster includes at least one of sodium hydroxide, potassium hydroxide and calcium hydroxide.

9. A method for preparing a degreasing agent for zirconium tube rolling according to any one of claims 1 to 8, characterized in that: The steps include: (1) After heating 1 / 10 to 1 / 5 of the mass fraction of deionized water, add the degreasing agent, chelating stabilizer and surfactant, and stir to disperse; (2) adding a corrosion inhibitor, a defoamer, and a bactericide to the dispersion obtained in step (1), and stirring and mixing; (3) Add the remaining deionized water to the mixed solution obtained in step (2), stir and mix, and then add a pH adjuster and stir and mix to obtain the degreasing agent for zirconium tube rolling.

10. The method for preparing a degreasing agent for zirconium tube rolling according to claim 9, characterized in that: In the step (1), the heating temperature is 40 to 70° C. And / or, in step (3), a pH adjuster is added to adjust the pH value of the mixed solution to 11.5-12.5.

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