Water-soluble non-emulsified tempering rust preventive liquid and preparation method thereof

Abstract

The application discloses a water-soluble non-emulsified tempering rust-proof liquid and a preparation method thereof. The water-soluble non-emulsified tempering rust-proof liquid is prepared from the following raw materials, wherein the raw materials are 100 parts, including 35.0-45.0 parts of water, 4.0-8.0 parts of diglycol amine, 10.0-15.0 parts of 2,4,6-tris(aminohexanoic acid group)-1,3,5-triazine, 8.0-12.0 parts of triethanolamine borate, 25.5-40.0 parts of polyalkylene glycol monobutyl ether, 0.03-0.1 parts of 1,2-benzisothiazolin-3-one, 0.03-0.08 parts of pyrithione sodium, 0.001-0.003 parts of 2,2'-dithiodipyridine-1-oxide, 1.0-2.5 parts of cationic quaternary ammonium salt and 0.5-5.0 parts of sodium carbonate. The tempering rust-proof liquid is formed into a water-based solution by taking water as a base dissolving solution, is easy to clean in the use process and can reduce the cost compared with oil. The application further provides a preparation method of the water-soluble non-emulsified tempering rust-proof liquid.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel surface rust prevention, in particular to a water-soluble non-emulsified tempering rust preventive liquid and a preparation method thereof. BACKGROUND

[0002] After the tempering heat treatment process of metal quenching and tempering, the metal is often immediately soaked in tempering oil, i.e. soaked in oily tempering rust preventive oil, so that the metal has rust prevention ability before the next process. However, the use of oily tempering oil is easy to produce oil fume, and the temperature of the metal after quenching and tempering is often higher than 400℃, which has safety hazards if the oil tank temperature is not controlled. In addition, the oil attached to the surface of the metal also causes difficulty in subsequent process treatment, which has adverse factors on environmental protection, safety and processing efficiency.

[0003] In the prior art, to solve the above technical problems, an emulsified tempering rust preventive oil has been developed, which eliminates the fire hazard, but causes greater problems in environmental protection, because the emulsified tempering rust preventive oil is easy to breed bacteria and difficult to treat waste liquid, and the problem of oil fume still exists. In addition, the emulsion attached to the processing device also has an impact on the subsequent process, so the emulsion must be removed before the subsequent process. SUMMARY

[0004] Therefore, the present application provides a water-soluble non-emulsified tempering rust preventive liquid and a preparation method thereof which can solve the above problems.

[0005] A water-soluble non-emulsified tempering rust preventive liquid is prepared from the following raw materials, which are 35.0-45.0 parts of water, 4.0-8.0 parts of diglycol amine, 10.0-15.0 parts of 2,4,6-tris(amino hexanoic acid)-1,3,5-triazine, 8.0-12.0 parts of triethanolamine borate, 25.5-40.0 parts of polyalkylene glycol monobutyl ether, 0.03-0.1 parts of 1,2-benzisothiazolin-3-one, 0.03-0.08 parts of pyrithione sodium, 0.001-0.003 parts of 2,2'-dithiodipyridine-1-oxide, 1.0-2.5 parts of cationic quaternary ammonium salt, and 0.5-5.0 parts of sodium carbonate, based on 100 parts.

[0006] Further, the pH value of the tempering rust preventive liquid is 9.0-10.0.

[0007] Further, the molecular weight of the polyalkylene glycol monobutyl ether is less than 1000 g / mol.

[0008] Further, the tempering anti-rust liquid includes, in 100 parts, 38.1585 parts of water, 7 parts of diethyleneglycol amine, 11 parts of 2,4,6-tris(amino hexanoic acid)-1,3,5-triazine, 11 parts of triethanolamine borate, 27 parts of polyalkylene glycol monobutyl ether, 0.08 parts of 1,2-benzisothiazol-3-one, 0.06 parts of sodium pyrithione, 0.0015 parts of 2,2'-dithiodipyridine-1-oxide, 2.2 parts of cationic quaternary ammonium salt, and 3.5 parts of sodium carbonate.

[0009] Further, the tempering anti-rust liquid includes, in 100 parts, 38.1585 parts of water, 7 parts of diethyleneglycol amine, 11 parts of 2,4,6-tris(amino hexanoic acid)-1,3,5-triazine, 11 parts of triethanolamine borate, 27 parts of polyalkylene glycol monobutyl ether, 0.08 parts of 1,2-benzisothiazol-3-one, 0.06 parts of sodium pyrithione, 0.0015 parts of 2,2'-dithiodipyridine-1-oxide, 2.2 parts of cationic quaternary ammonium salt, and 3.5 parts of sodium carbonate.

[0010] A method for preparing a water-soluble non-emulsified tempering anti-rust liquid, comprising the following steps:

[0011] STEP 101: providing all the component materials required for preparing the water-soluble non-emulsified tempering anti-rust liquid;

[0012] STEP 102: mixing water and diethyleneglycol amine to form an alkaline aqueous solution, and then adding powdered 2,4,6-tris(amino hexanoic acid)-1,3,5-triazine to make it react to form water-soluble salts;

[0013] STEP 103: adding triethanolamine borate and dissolving it uniformly;

[0014] STEP 104: adding polyalkylene glycol monobutyl ether and dissolving it fully to form a viscous aqueous solution;

[0015] STEP 105: adding 1,2-benzisothiazol-3-one, sodium pyrithione, and 2,2'-dithiodipyridine-1-oxide;

[0016] STEP 106: adding cationic quaternary ammonium salt to make the tempering anti-rust liquid have the function of sinking metal debris;

[0017] STEP 107: adding sodium carbonate to adjust the pH value to 9.0-10.0 to avoid microbial growth, thereby preparing the water-soluble non-emulsified tempering anti-rust liquid.

[0018] Further, the salt aqueous solution formed in STEP 102 is white fog-like, and the pH of the salt aqueous solution is 6.2-6.8.

[0019] Further, in STEP 103, after the addition of the triethanolamine borate, the pH of the solution is 7.2-7.8.

[0020] Further, in STEP 103, the pH value is adjusted according to the purity and the addition amount of the triethanolamine borate.

[0021] Compared with the prior art, the water-soluble non-emulsified tempering rust preventive liquid provided by the present application forms a water-based solution by using water as a base solution, is easy to clean during use, and has a reduced cost relative to oil. In order to prevent the water-based solution from breeding microorganisms, 1,2-benzisothiazolin-3-one, sodium pyrithione, and 2,2'-dithiodipyridine-1-oxide are first added to prevent the breeding of microorganisms from different angles, and sodium carbonate is added to adjust the pH value to 9.0-10.0, so that the tempering rust preventive liquid is weakly alkaline, further preventing the generation of microorganisms, and forming a biologically stable tempering rust preventive liquid. By adding polyalkylene glycol monobutyl ether and using its inverse solubility characteristics, the tempering rust preventive liquid is a viscous liquid at room temperature, dissolves in water to increase the viscosity of the water body and increase the adhesion capacity, so that the tempering rust preventive liquid can be attached to the processed object to achieve the purpose of rust prevention. When the temperature of the contact surface of the liquid and the metal is high, the inverse solute will cover the metal surface, making it difficult for heat to be conducted, maintaining the metal from experiencing a sudden temperature drop, and preventing the deterioration of the mechanical properties of the metal. At the same time, by adding the cationic quaternary ammonium salt, it can continuously capture metal ions and precipitate at the bottom of the tempering rust preventive liquid, thereby reducing the floating of metal debris on the surface of the tempering rust preventive liquid. In addition, by adding 2,4,6-tris(aminohexanoic acid)-1,3,5-triazine, it is used to form a ternary carboxylic acid amine salt with diethylene glycol amine. The ternary carboxylic acid amine salt has a rust prevention effect due to the carboxylate group, and the addition of triethanolamine borate makes an excellent biologically stable water-soluble non-emulsified tempering rust preventive liquid. DETAILED DESCRIPTION

[0022] The specific embodiments of the present application are further described in detail below. It should be understood that the description of the embodiments of the present application herein is not intended to limit the scope of protection of the present application.

[0023] The water-soluble non-emulsified tempering anti-rust liquid provided by the present application is made of the following raw materials, and the raw materials include, by 100 parts, 35.0-45.0 parts of water, 4.0-8.0 parts of diglycolamine, 10.0-15.0 parts of 2,4,6-tris(amino hexanoic acid)-1,3,5-triazine, 8.0-12.0 parts of triethanolamine borate, 25.5-40.0 parts of polyalkylene glycol monobutyl ether, 0.03-0.1 parts of 1,2-benzisothiazol-3-ketone, 0.03-0.08 parts of sodium pyrithione, 0.001-0.003 parts of 2,2'-dithiodipyridine-1-oxide, 1.0-2.5 parts of cationic quaternary ammonium salt, and 0.5-5.0 parts of sodium carbonate.

[0024] The above components are all prior art, so their properties and preparation methods should be known to those skilled in the art. For example, the English name of sodium pyrithione is Sodium Pyrithione, and the substance identification number (Cas) is 3811-73-2. The English name of 2,2'-dithiodipyridine-1-oxide is Pyridine,2-2'-Dithiobis-1,1'-Dioxide, and the substance identification number (Cas) is 3696-28-4. Therefore, the properties and preparation methods of the above components should be known to those skilled in the art, and will not be described here.

[0025] Since water-based products have the potential to breed microorganisms, resulting in bacteria, and the bacterial metabolites are mostly slightly acidic, such as carbonic acid, hydrogen sulfide, such acidic substances are easy to cause metal rusting, and reduce the pH value of water-soluble non-emulsified tempering rust preventive. In order to ensure the biological stability of the tempering rust preventive, only sodium carbonate is not enough, that is, only adjusting the pH value to 9.0-10.0 is not enough, so additional prevention of breeding microorganisms is also needed. Therefore, a non-formaldehyde-releasing bacteriostatic agent needs to be added. In the prior art, formaldehyde-releasing ones are commonly used, which are low in cost but have great harm to the human body. In the case of low addition amount (500 ppm), they can still cause irritation to the human skin. Therefore, by adding 1,2-benzisothiazol-3-ketone, sodium pyrithione, and 2,2'-dithiodipyridine-1-oxide, the present application has antibacterial and antifungal functions, and can inhibit different bacteria respectively. Specifically, 1,2-benzisothiazol-3-ketone can inhibit bacterial growth, so it can destroy the synthesis of bacterial proteins and cause them to be unable to multiply. Sodium pyrithione and 2,2'-dithiodipyridine-1-oxide can inhibit the growth period of mold and also inhibit the activity of mold spores used for reproduction. At the same time, the components of 1,2-benzisothiazol-3-ketone, sodium pyrithione, and 2,2'-dithiodipyridine-1-oxide should also be strictly limited. In the present embodiment, the upper and lower limits of each component are necessary. If less than the lower limit, microorganisms cannot be completely extinguished, resulting in the possibility of microorganism resistance. If more than the upper limit, the above three substances can easily cause irritation to the human skin, which is not complete enough.

[0026] The added polyalkylene glycol monobutyl ether, commonly known as PAG, has inverse solubility, that is, its solubility is inversely proportional to temperature. The PAG can be well dissolved in water at room temperature, and will precipitate out of the water when the water temperature rises. Therefore, the polyalkylene glycol monobutyl ether is a viscous liquid at room temperature, dissolves in water to increase the viscosity of the water, thereby increasing the viscosity of the water at room temperature to approximate that of oil, increasing the adhesion, and thus increasing the adhesion of the tempering and rust-proofing liquid to the workpiece, achieving the purpose of rust prevention. Since the temperature of the metal after quenching and tempering heat treatment is still greater than 400℃, direct immersion in the tempering and rust-proofing liquid can cause the mechanical properties of the metal to deteriorate. The use of the PAG as a thickening agent in the present tempering and rust-proofing liquid uses its inverse solubility, that is, when the liquid and metal contact surface temperature is high, the inverse solubility will cover the metal surface, making it difficult to conduct heat, maintaining the metal from temperature shock, and preventing the mechanical properties of the metal from deteriorating. Since the present water-soluble non-emulsified tempering and rust-proofing liquid may need to be diluted by several times, with a maximum dilution of 20 times, the amount of polyalkylene glycol monobutyl ether should be limited to 25.5-40.0 parts. If less than 25.5 parts, the viscosity of the present tempering and rust-proofing liquid will be less than 30 cSt, which is not conducive to adhesion to the metal surface, and when the heat-treated workpiece at a temperature as high as 400℃ continues to enter the working liquid, water vapor is easily produced, which is not conducive to maintaining the concentration of the tempering and rust-proofing liquid. When more than 40 parts, the viscosity of the present tempering and rust-proofing liquid is as high as 2030 cSt, which makes it difficult to prepare in large quantities, consumes more power, and is not easy to pour out of the container when used by customers. If used at a dilution of 5 times, the viscosity is as high as 118 cSt, and when the tempered workpiece is removed from the tempering and rust-proofing liquid, a large amount of the tempering and rust-proofing liquid adhering to the workpiece is taken out, causing industrial waste. In addition, due to the high viscosity, heat dissipation is not easy, the temperature of the tempering and rust-proofing liquid will continue to rise, which may exacerbate the oxidation of the tempering and rust-proofing liquid, increase the energy consumption of the cooling equipment, and make the workpiece surface sticky and easy to attract dust, which is not conducive to subsequent processing or cleaning. Therefore, the amount of polyalkylene glycol monobutyl ether should be limited to 25.5-40.0 parts.

[0027] In addition, since the temperature of the metal after tempering is still greater than 400℃, it is in the high temperature stage, and when the PAG is attached to the metal surface after inverse solubility, the metal is in the high temperature stage. If a high molecular weight PAG is used, the high temperature will cause it to deteriorate, and it is possible to produce a gel, which not only affects the cleanliness of the metal surface, but also reduces the inverse solubility of the PAG. Therefore, a low molecular weight PAG, that is, the molecular weight of the PAG should be less than 1000 g / mol, should be selected to avoid the production of gelled oxides at the liquid-gas interface, because high molecular weight polymers are more easily oxidized than low molecular weight polymers.

[0028] Generally, after the metal that needs to be tempered is immersed in the tempering solution, a layer of metal residue will be formed on the surface of the tempering solution. If the residue floats on the surface of the tempering solution, it will adhere to the surface of the metal, so that the PAG cannot completely cover the surface of the metal, thereby forming rust spots and reducing the quality of the product. Therefore, the cationic quaternary ammonium salt needs to be added, because the cationic quaternary ammonium salt is a compound in which the four hydrogen atoms in the ammonium ion are replaced by hydrocarbon groups, with the general formula R4NX, X - is a halogen group or a negatively charged ion such as an acid radical, so X- can capture positively charged ions in water. Therefore, for metal ions entering the water during tempering, the cationic quaternary ammonium salt will continuously capture metal ions, causing the group to continuously increase, and finally precipitate at the bottom of the tempering anti-rust solution, thereby reducing the amount of metal debris floating on the surface of the tempering anti-rust solution and reducing the amount of debris adhering to the surface of the metal after immersion, which can cause rust spots. The settled metal residue will accumulate at the bottom of the pool, making it difficult for the liquid pump to extract the metal debris, which can prevent damage to the liquid pump

[0029] It is well known that common microorganisms in the atmosphere are suitable for growth in different pH value ranges, such as: yeast groups suitable for growth in an environment with a pH value of 4.0-6.0, molds can grow in a pH value range of 2.0-8.0, and Staphylococcus aureus is suitable for growth in a pH value range of 7.0-8.5. These are common microorganisms in the atmosphere, so avoiding the pH value range suitable for the growth of microorganisms in the atmosphere can reduce the probability of microbial breeding. In this embodiment, the pH value of the tempering anti-rust solution is between 9.0 and 10, so that microorganisms in the atmosphere do not grow in the tempering anti-rust solution, and the tempering anti-rust solution does not deteriorate due to the acidic products metabolized by the growth of microorganisms, and the metal does not rust due to the acidic substances. However, when the pH is greater than 10, it may cause skin irritation to the operator. Therefore, the pH value of the tempering anti-rust solution is adjusted to 9.0-10.0 by the sodium carbonate, which can make the tempering anti-rust solution have good rust resistance and biological stability.

[0030] The diglycolamine itself can inhibit the precipitation of cobalt ions. The entry of cobalt ions into the anti-rust solution will make the color of the anti-rust solution dark red, which is not visually appealing. The precipitation of cobalt ions can also cause the hardness of the metal being processed to decrease, which is contrary to the purpose of metal heat treatment hardening. At the same time, diglycolamine can also react with 2,4,6-tris(aminohexanoate)-1,3,5-triazine to form an anti-rust agent, which further enhances the effectiveness of the tempering anti-rust solution.

[0031] 2,4,6-tris(aminohexanoate)-1,3,5-triazine is used to form a ternary carboxylic acid amine salt with diglycolamine. The ternary carboxylic acid amine salt has a carboxylate group, thereby having an anti-rust effect.

[0032] Triethanolamine borate is a kind of anti-rust agent. Its aqueous solution can form a thin film on the surface of metal, reducing the contact between metal and oxygen, thereby achieving anti-rust.

[0033] The present application also provides a preparation method of the water-soluble non-emulsified tempering anti-rust liquid, which comprises the following steps:

[0034] STEP 101: providing all component materials required for preparing the water-soluble non-emulsified tempering anti-rust liquid;

[0035] STEP 102: after mixing water and diethanolamine uniformly to form an alkaline aqueous solution, adding powdered 2,4,6-tris(aminohexanoyl)-1,3,5-triazine to make it react to generate a water-soluble salt, the pH of the salt aqueous solution is about 6.2-6.8, at this time, the salt aqueous solution may present white mist;

[0036] STEP 103: adding triethanolamine borate, uniformly dissolving, the solution will change from white mist to clear and transparent, at this time, the pH is about 7.2-7.8;

[0037] STEP 104: adding polyalkylene glycol monobutyl ether and fully dissolving to form a viscous aqueous solution;

[0038] STEP 105: adding 1,2-benzisothiazolin-3-one, sodium pyrithione, and 2,2'-dithiodipyridine-1-oxide;

[0039] STEP 106: adding a cationic quaternary ammonium salt to make the tempering anti-rust liquid have the function of settling metal debris;

[0040] STEP 107: adding sodium carbonate to adjust the pH value to 9.0-10.0 to avoid microbial growth, thereby preparing a biologically stable water-soluble non-emulsified tempering anti-rust liquid.

[0041] In STEP 102, the pH value of the salt aqueous solution is 6.2-6.8, which is determined by the purity and addition ratio of diethanolamine and 2,4,6-tris(aminohexanoyl)-1,3,5-triazine, and does not need to be adjusted.

[0042] In STEP 103, the pH value after adding triethanolamine borate is 7.2-7.8. The pH value may vary depending on the purity and addition amount of triethanolamine borate. In the present embodiment, the purity of triethanolamine borate used is >95% and the addition ratio, after uniform dissolution, the actual measured pH value is 7.5, so the pH value is the actual value, not the adjusted value. Specific embodiments

[0044] Example 1: The tempering anti-rust liquid, in 100 points, includes 37.868 parts of water, 5 parts of diglycol amine, 12 of 2,4,6-tris(amino hexanoic acid)-1,3,5-triazine, 9 parts of triethanolamine borate, 32 parts of polyalkylene glycol monobutyl ether, 0.07 parts of 1,2-benzisothiazol-3-one, 0.06 parts of sodium pyrithione, 0.002 parts of 2,2'-dithiodipyridine-1-oxide, 1.5 parts of cationic quaternary ammonium salt, and 2.5 parts of sodium carbonate.

[0045] Example 2: The tempering anti-rust liquid, in 100 points, includes 38.1585 parts of water, 7 parts of diglycol amine, 11 of 2,4,6-tris(amino hexanoic acid)-1,3,5-triazine, 11 parts of triethanolamine borate, 27 parts of polyalkylene glycol monobutyl ether, 0.08 parts of 1,2-benzisothiazol-3-one, 0.06 parts of sodium pyrithione, 0.0015 parts of 2,2'-dithiodipyridine-1-oxide, 2.2 parts of cationic quaternary ammonium salt, and 3.5 parts of sodium carbonate.

[0046] Parameter table after testing and comparison with engine oil and diesel

[0047] Oily tempering rust preventive oil Emulsified tempering rust preventive liquid Non-emulsified tempering rust preventive liquid Dilution ratio Non-dilutable 1-20 times 1-20 times Ignition point 240℃ Non-flammable Non-flammable Oil mist Yes No No Water solubility 0 g / 100 g H2O 42 g / 100 g H2O > 1500 g / 100 g H2O Waste liquid state Oxidized oil and barium salt Emulsion and floating oil Oil-free transparent aqueous solution Moisture box test >200hr 126hr >200hr

[0048] In terms of dilution ratio, 1 part of the water-soluble non-emulsified tempering anti-rust liquid can be diluted into a maximum of 20 parts, thereby saving transportation costs.

[0049] In terms of ignition point, the present application has no combustion possibility.

[0050] In terms of water solubility, the present application is easily soluble in water, i.e. easily washed.

[0051] In terms of waste liquid state, the present application does not need to handle waste lubricating oil and heavy metal salt.

[0052] In terms of wet box test, the rust prevention ability of the present application can replace oil-based and emulsion liquid products.

[0053] Compared with the prior art, the water-soluble non-emulsified tempering rust preventive liquid provided by the present application uses water as a base dissolving solution to form a water-based solution, which is easy to clean during use and can reduce the cost compared with oil. In order to prevent the water-based solution from breeding microorganisms, 1,2-benzisothiazolin-3-one, sodium pyrithione and 2,2'-dithiodipyridine-1-oxide are first added to prevent the breeding of microorganisms from different angles, and sodium carbonate is added to adjust the pH value to 9.0-10.0, so that the tempering rust preventive liquid is weakly alkaline, further preventing the generation of microorganisms, and forming a biologically stable tempering rust preventive liquid. By adding polyalkylene glycol monobutyl ether and using its inverse solubility characteristics, the tempering rust preventive liquid is a viscous liquid at room temperature, dissolves in water to increase the viscosity of the water body and increase the adhesion capacity, so that the tempering rust preventive liquid can be attached to the processed object to achieve the purpose of rust prevention. When the temperature of the contact surface of the liquid and the metal is high, the inverse solubility material will cover the metal surface, making it difficult to conduct heat, maintaining the metal from temperature drop, and preventing the deterioration of the mechanical properties of the metal. At the same time, by adding the cationic quaternary ammonium salt, it can continuously capture metal ions and precipitate at the bottom of the tempering rust preventive liquid, thereby reducing the floating of metal debris on the surface of the tempering rust preventive liquid. In addition, by adding 2,4,6-tris(aminohexanoic acid)-1,3,5-triazine, it is used to form a ternary carboxylic acid amine salt with diethylene glycol amine. The ternary carboxylic acid amine salt has a rust prevention effect due to the carboxylate group, and triethanolamine borate is added to form a biologically stable excellent water-soluble non-emulsified tempering rust preventive liquid.

[0054] The above is only a preferred embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement or improvement within the spirit of the present application is covered within the scope of the claims of the present application.

Claims

1. A water-soluble, non-emulsified tempering rust inhibitor, comprising the following components, in 100 parts: 35.0–45.0 parts water, 4.0–8.0 parts diethylene glycol amine, 10.0–15.0 parts 2,4,6-tris(aminohexanoic acid)-1,3,5-triazine, 8.0–12.0 parts triethanolamine borate, 25.5–40.0 parts polyalkylene glycol monobutyl ether, 0.03–0.1 parts 1,2-benzoisothiazolyl-3-one, 0.03–0.08 parts sodium pyridinethione, and [other components not specified in the original text]. The preparation comprises 0.001 to 0.003 parts of 2,2'-dithiodipyridine-1-oxide, 1.0 to 2.5 parts of cationic quaternary ammonium salt, and 0.5 to 5.0 parts of sodium carbonate. First, water and diethylene glycolamine are mixed evenly to form an alkaline aqueous solution. Then, powdered 2,4,6-tris(aminohexanoic acid)-1,3,5-triazine is added to react and generate a water-soluble salt. The remaining components are then added. The pH value of the tempering rust inhibitor is 9.0-10.0, and the molecular weight of the polyalkylene glycol monobutyl ether is less than 1000 g / mol.

2. The water-soluble, non-emulsified tempering rust inhibitor as described in claim 1, characterized in that: The tempering rust inhibitor comprises, by weight 100 parts, 37.868 parts water, 5 parts diethylene glycolamine, 12 parts 2,4,6-tris(aminohexanoic acid)-1,3,5-triazine, 9 parts triethanolamine borate, 32 parts polyalkylene glycol monobutyl ether, 0.07 parts 1,2-benzothiazolyl-3-one, 0.06 parts sodium pyridinethione, 0.002 parts 2,2'-dithiodipyridine-1-oxide, 1.5 parts cationic quaternary ammonium salt, and 2.5 parts sodium carbonate.

3. The water-soluble, non-emulsified tempering rust inhibitor as described in claim 1, characterized in that: The tempering rust inhibitor comprises, by weight 100 parts, 38.1585 parts water, 7 parts diethylene glycolamine, 11 parts 2,4,6-tris(aminohexanoic acid)-1,3,5-triazine, 11 parts triethanolamine borate, 27 parts polyalkylene glycol monobutyl ether, 0.08 parts 1,2-benzothiazolyl-3-one, 0.06 parts sodium pyridinethione, 0.0015 parts 2,2'-dithiodipyridine-1-oxide, 2.2 parts cationic quaternary ammonium salt, and 3.5 parts sodium carbonate.

4. A method for preparing a water-soluble, non-emulsified tempering rust inhibitor as described in any one of claims 1 to 3, comprising the following steps: STEP101: Provide all the component materials required for preparing the water-soluble non-emulsified tempering rust inhibitor; STEP102: Mix water and diethylene glycolamine evenly to form an alkaline aqueous solution, then add powdered 2,4,6-tris(aminohexanoic acid)-1,3,5-triazine to react and form a water-soluble salt. STEP103: Add the triethanolamine borate ester and dissolve it evenly; STEP104: Add polyalkylene glycol monobutyl ether and dissolve it completely to form a viscous aqueous solution; STEP105: Add 1,2-benzothiazolyl-3-one, sodium pyrithione, and 2,2'-dithiodipyridine-1-oxide; STEP106: Add a cationic quaternary ammonium salt to give the tempering rust inhibitor the function of settling metal debris; STEP107: Add sodium carbonate to adjust the pH to 9.0-10.0 to prevent microbial growth, thus preparing the water-soluble non-emulsified tempering rust inhibitor.

5. The preparation method of the water-soluble non-emulsified tempering rust inhibitor as described in claim 4, characterized in that: The salt solution formed in STEP102 appears as a white mist, and the pH of the salt solution is 6.2-6.

8.

6. The method for preparing the water-soluble non-emulsified tempering rust inhibitor as described in claim 4, characterized in that: In STEP103, after adding the triethanolamine borate ester, the pH of the solution is 7.2-7.

8.

7. The method for preparing the water-soluble non-emulsified tempering rust inhibitor as described in claim 6, characterized in that: In STEP103, the pH value is adjusted according to the purity and amount of triethanolamine borate added.