Rust-proofing enhancer for PAG quenching liquid and preparation method thereof

Abstract

The application discloses a rust-proof enhancer for PAG quenching liquid, and raw materials of the rust-proof enhancer include the following components in parts by weight: 40-45 parts of organic-inorganic rust-proof additive, 35-40 parts of pH regulator, 5-10 parts of non-ferrous metal rust-proof agent and 5-10 parts of antibacterial agent; the organic-inorganic rust-proof additive is a mixture of dicarboxylic acid, tricarboxylic acid, phytic acid, isomeric decanoic acid, fatty acid amide or fatty acid amine salt and sodium tungstate; the components synergistically generate a stable rust-proof film on the surface of metal, the rust-proof film has strong adhesion and can be firmly attached to the surface of metal, is less affected by the polarity of PAG, can effectively enhance the rust-proof performance of steel workpieces after quenching, and has no adverse effect on the properties such as the cloud point, viscosity, foam and cooling characteristics of the quenching liquid.

Description

TECHNICAL FIELD

[0001] The present application relates to a rust-proof enhancer, in particular to a rust-proof enhancer for PAG quenching liquid and a preparation method thereof. BACKGROUND

[0002] PAG quenching agent is the most commonly used and the best effect water-based quenching medium at home and abroad. The cooling speed of PAG water-soluble quenching medium is between that of brine and cold oil, the cooling capacity can be adjusted, the applicable quenching steel types are wide, the service life is long, it is non-toxic, smokeless, odorless, non-corrosive, non-combustible, anti-aging, safe and reliable, the quenching hardness is uniform, and the quenching deformation and cracking tendency can be significantly reduced. The PAG quenching agent is made of PAG polymer as the main component and other additives to provide auxiliary properties. During the quenching process of the workpiece, once the liquid temperature around the workpiece rises above the cloud point of the solution, the PAG polymer is desorbed from the solution and suspended in the quenching liquid in the form of fine liquid beads. The suspended PAG liquid beads adhere to the surface of the workpiece by their very good wettability as soon as they come into contact with the red-hot workpiece, forming a film to regulate the cooling speed of water and avoid quenching cracking of the workpiece. After the workpiece cools down, the polymer adhering to the workpiece will dissolve back into the quenching liquid. For workpieces of different materials and shapes, the mechanical properties required for quenching of the workpiece can be obtained by adjusting the concentration of the medium, that is, by controlling the PAG polymer film thickness and the vapor film level breakage temperature, to reduce quenching deformation and avoid quenching cracking. However, due to the strong polarity of PAG, the stability of the rust-proof component in the protective film on the metal surface is seriously affected, the protective film produced by the rust-proof agent becomes very fragile, and the electronic polarity is enhanced, which rapidly oxidizes and rusts the metal surface under the action of oxygen and water, causing the quenched workpiece to quickly rust and resulting in workpiece scrap. If the amount of rust-proof agent is increased in the PAG quenching liquid to enhance the rust-proof performance of the PAG quenching liquid, it may affect the cloud point, viscosity, foam, cooling characteristics and other properties of the quenching liquid. SUMMARY

[0003] Therefore, the purpose of the present application is to provide a rust-proof enhancer for PAG quenching liquid and a preparation method thereof, which can effectively enhance the rust-proof performance of quenched steel workpieces and has no adverse effect on the cloud point, viscosity, foam, cooling characteristics and other properties of the quenching liquid.

[0004] The rust-proof enhancer for PAG quenching liquid of the present application comprises the following components by weight: 40-45 parts of organic-inorganic rust-proof additive, 35-40 parts of pH regulator, 5-10 parts of non-ferrous metal rust-proof agent, and 5-10 parts of antibacterial agent, wherein the organic-inorganic rust-proof additive is a mixture of dicarboxylic acid, tricarboxylic acid, phytic acid, isomeric decanoic acid, fatty acid amide or fatty acid amine salt, and sodium tungstate.

[0005] Further, the pH regulator is an organic amine pH regulator;

[0006] Further, the pH regulator is a mixture of triethanolamine, monoethanolamine, isopropanolamine, AMP-95 and dihydroxyethyl cyclohexylamine;

[0007] Further, the non-ferrous metal antirust agent is a mixture of benzotriazole, methyl benzotriazole sodium salt and magnesium aluminum corrosion inhibitor DX5819;

[0008] Further, the antibacterial agent is a mixture of BK, MBM and IPBC;

[0009] Further, the organic-inorganic antirust additive is 42 parts, the pH regulator is 37 parts, the non-ferrous metal antirust agent is 7 parts, and the antibacterial agent is 8 parts.

[0010] The application further discloses a preparation method of the antirust enhancer of the PAG quenching liquid, which comprises the following steps: mixing the pH regulator with a proper amount of deionized water, heating to 70-90 DEG C under constant stirring, then adding dicarboxylic acid, tricarboxylic acid, phytic acid and isomeric decanoic acid, fully reacting for 0.9-1.2 hours under constant stirring, cooling to 30-50 DEG C by adding deionized water, then adding a mixture of fatty acid amide or amine salt and sodium tungstate and the non-ferrous metal antirust agent, and finally adding the antibacterial agent and stirring uniformly.

[0011] The PAG quenching liquid antirust enhancer and the preparation method thereof have the advantages that the components synergistically generate a stable antirust film on the metal surface, the antirust film has strong adhesion and can be firmly attached to the metal surface, the antirust film is less affected by the polarity of the PAG, the antirust performance of the quenched steel workpiece can be effectively enhanced, and the antirust enhancer has no adverse effect on the properties such as the cloud point, viscosity, foam and cooling characteristics of the quenching liquid. DETAILED DESCRIPTION

[0012] The following examples are further illustrations of the application, but the scope of the application is not limited to the examples.

[0013] In the examples, the experimental methods used are conventional methods unless otherwise specified, and the materials, reagents and the like used are commercially available unless otherwise specified.

[0014] The rust-proof enhancer of the PAG quenching liquid of the embodiment includes the following components by weight: 40-45 parts of organic-inorganic rust-proof additive, 35-40 parts of pH regulator, 5-10 parts of non-ferrous metal rust-proof agent, and 5-10 parts of antibacterial agent. The organic-inorganic rust-proof additive is a mixture of dicarboxylic acid, tricarboxylic acid, phytic acid, isomeric decanoic acid, fatty acid amide or fatty acid amine salt, and sodium tungstate. That is, the fatty acid amide or fatty acid amine salt can be used as one of the components of the organic-inorganic rust-proof additive, and the components work together to generate a stable rust-proof film on the metal surface, which has strong adhesion and can be firmly attached to the metal surface, is less affected by the polarity of PAG, and can effectively enhance the rust-proof performance of the quenched steel workpiece. In particular, it has no adverse effect on the properties of the quenching liquid such as the cloud point, viscosity, foam, and cooling characteristics. Among them, the sodium tungstate in the organic-inorganic rust-proof additive plays a passivation role, generating a very thin, dense, and well-covered passivation film on the metal surface, which completely separates the workpiece from the corrosive medium, preventing the workpiece from contacting the corrosive medium, thereby stopping the dissolution of the workpiece and forming a passive state to achieve the purpose of rust prevention. The remaining components play an adsorption-type rust-proof role. The adsorption of the components on the metal surface reduces the ionization tendency of the metal, thereby reducing the reaction energy of the metal surface atoms and hindering the movement of relevant charges or substances involved in the corrosion reaction, which slows down the corrosion rate. The synergistic effect of passivation and adsorption improves the rust-proof effect.

[0015] In the embodiment, the pH regulator is an organic amine pH regulator; the pH regulator is a mixture of triethanolamine, monoethanolamine, isopropanolamine, AMP-95, and dihydroxyethyl cyclohexylamine; the pH value of the rust-proof enhancer is adjusted to improve the stability of the rust-proof enhancer and the stability of the protective film generated by the rust-proof components on the metal surface.

[0016] In the embodiment, the non-ferrous metal rust-proof agent is a mixture of benzotriazole, methyl benzotriazole sodium salt, and magnesium-aluminum corrosion inhibitor DX5819; it cooperates with the organic-inorganic rust-proof additive to improve the rust-proof performance and generate a stable rust-proof film on the metal surface, which has strong adhesion and can be firmly attached to the metal surface. Among them, the magnesium-aluminum corrosion inhibitor DX5819 is a product of DeXu New Materials (Guangzhou) Co., Ltd., and DX5819 is a non-ferrous metal corrosion inhibitor that has excellent corrosion inhibition performance for high-magnesium-aluminum materials, high-zinc-aluminum materials, copper materials, etc., and also has good lubricity. This product does not contain elements such as phosphorus, silicon, and boron, can be miscible with water in any proportion, is widely used in the mechanical and metallurgical industries, can significantly improve the non-ferrous metal corrosion inhibition performance and lubricity of metal processing and alkaline cleaning agent systems, does not contain phosphorus, silicon, and boron, can effectively prevent corrosion problems of high-magnesium-aluminum materials, high-zinc-aluminum materials, copper materials, etc., and is an extreme pressure lubricant with excellent extreme pressure lubricity.

[0017] In this embodiment, the antibacterial agent is a mixture of BK, MBM and IPBC; the bactericide BK is a triazine type bactericide with slow release, low toxicity, high efficiency and gas phase bactericidal capacity, which is suitable for inhibiting the growth and reproduction of microorganisms in various humid environments, preventing corruption and the generation of foul odor. BK, MBM and IPBC work together to improve the stability of the rust-proof enhancer in the PAG quenching liquid.

[0018] Preferably, the organic-inorganic rust-proof additive is 42 parts, the pH regulator is 37 parts, the non-ferrous metal rust-proof agent is 7 parts, and the antibacterial agent is 8 parts.

[0019] The preparation method of the rust-proof enhancer of the PAG quenching liquid in this embodiment comprises the following steps: first, a mixture of triethanolamine, monoethanolamine, isopropanolamine, AMP-95 and dihydroxyethylcyclohexylamine is injected into a reaction kettle and an appropriate amount of deionized water is added, and then the temperature is raised to 70-90℃ under constant stirring for preservation, then dicarboxylic acid, tricarboxylic acid, phytic acid and isomeric decanoic acid are added, and the reaction is carried out for 0.9-1.2 hours under constant stirring. Then the remaining deionized water is added, and the temperature is lowered to 30-50℃, then a mixture of fatty acid amide or amine salt, sodium tungstate, and non-ferrous metal rust-proof agent (benzotriazole, methyl benzotriazole sodium salt and magnesium-aluminum corrosion inhibitor DX5819) is added. Finally, the antibacterial agent is BK, MBM and IPBC. Stirring is uniform, and the solution is fully dissolved to obtain a light yellow transparent liquid. Laboratory testing is qualified, and the product can be packaged and stored.

[0020] Example 1

[0021] The rust-proof enhancer of the PAG quenching liquid of the present application, the raw materials of the rust-proof enhancer include the following components by weight: organic-inorganic rust-proof additive 40 parts, pH regulator 35 parts, non-ferrous metal rust-proof agent 5 parts, and antibacterial agent 5 parts.

[0022] The rust-proof enhancer of the PAG quenching liquid in this embodiment, first, the pH regulator (a mixture of triethanolamine, monoethanolamine, isopropanolamine, AMP-95 and dihydroxyethylcyclohexylamine) is injected into a reaction kettle and an appropriate amount of deionized water is added, and then the temperature is raised to 80℃ under constant stirring for preservation, then dicarboxylic acid, tricarboxylic acid, phytic acid and isomeric decanoic acid are added, and the reaction is carried out for 1 hour under constant stirring, then the remaining deionized water is added, and the temperature is lowered to 40℃, then a mixture of fatty acid amide and sodium tungstate and non-ferrous metal rust-proof agent is added, and finally an antibacterial agent is added, stirring is uniform, and the solution is fully dissolved to obtain a light yellow transparent liquid.

[0023] Example 2

[0024] The rust-proof enhancer of the PAG quenching liquid of the present application, the raw materials of the rust-proof enhancer include the following components by weight: organic-inorganic rust-proof additive 40 parts, pH regulator 35 parts, non-ferrous metal rust-proof agent 5 parts, and antibacterial agent 5 parts.

[0025] The rust-proof enhancer of the PAG quenching liquid of the embodiment is prepared by first injecting a pH regulator (a mixture of triethanolamine, monoethanolamine, isopropanolamine, AMP-95 and dihydroxyethyl cyclohexylamine) into a reaction kettle and adding a proper amount of deionized water, heating to 70°C under constant stirring, then adding dicarboxylic acid, tricarboxylic acid, phytic acid and isomeric decanoic acid, fully reacting for 0.9 hours under constant stirring, then adding the remaining deionized water and cooling to 30°C, then adding a fatty amine salt and sodium tungstate and a non-ferrous metal rust-proof agent, and finally adding an antibacterial agent, stirring uniformly and fully dissolving to obtain a light yellow transparent liquid.

[0026] Example Three

[0027] The rust-proof enhancer of the PAG quenching liquid of the embodiment is prepared by first injecting a pH regulator (a mixture of triethanolamine, monoethanolamine, isopropanolamine, AMP-95 and dihydroxyethyl cyclohexylamine) into a reaction kettle and adding a proper amount of deionized water, heating to 70°C under constant stirring, then adding dicarboxylic acid, tricarboxylic acid, phytic acid and isomeric decanoic acid, fully reacting for 0.9 hours under constant stirring, then adding the remaining deionized water and cooling to 30°C, then adding a fatty amine salt and sodium tungstate and a non-ferrous metal rust-proof agent, and finally adding an antibacterial agent, stirring uniformly and fully dissolving to obtain a light yellow transparent liquid.

[0028] The rust-proof enhancer of the PAG quenching liquid of the embodiment is prepared by first injecting a pH regulator (a mixture of triethanolamine, monoethanolamine, isopropanolamine, AMP-95 and dihydroxyethyl cyclohexylamine) into a reaction kettle and adding a proper amount of deionized water, heating to 70°C under constant stirring, then adding dicarboxylic acid, tricarboxylic acid, phytic acid and isomeric decanoic acid, fully reacting for 0.9 hours under constant stirring, then adding the remaining deionized water and cooling to 30°C, then adding a fatty amine salt and sodium tungstate and a non-ferrous metal rust-proof agent, and finally adding an antibacterial agent, stirring uniformly and fully dissolving to obtain a light yellow transparent liquid.

[0029] Example Four

[0030] The rust-proof enhancer of the PAG quenching liquid of the embodiment is prepared by first injecting a pH regulator (a mixture of triethanolamine, monoethanolamine, isopropanolamine, AMP-95 and dihydroxyethyl cyclohexylamine) into a reaction kettle and adding a proper amount of deionized water, heating to 70°C under constant stirring, then adding dicarboxylic acid, tricarboxylic acid, phytic acid and isomeric decanoic acid, fully reacting for 0.9 hours under constant stirring, then adding the remaining deionized water and cooling to 30°C, then adding a fatty amine salt and sodium tungstate and a non-ferrous metal rust-proof agent, and finally adding an antibacterial agent, stirring uniformly and fully dissolving to obtain a light yellow transparent liquid.

[0031] The rust-proof enhancer of the PAG quenching liquid of the embodiment is prepared by first injecting a pH regulator (a mixture of triethanolamine, monoethanolamine, isopropanolamine, AMP-95 and dihydroxyethyl cyclohexylamine) into a reaction kettle and adding a proper amount of deionized water, heating to 70°C under constant stirring, then adding dicarboxylic acid, tricarboxylic acid, phytic acid and isomeric decanoic acid, fully reacting for 0.9 hours under constant stirring, then adding the remaining deionized water and cooling to 30°C, then adding a fatty amine salt and sodium tungstate and a non-ferrous metal rust-proof agent, and finally adding an antibacterial agent, stirring uniformly and fully dissolving to obtain a light yellow transparent liquid.

[0032] Example Five

[0033] The rust-proof enhancer of the PAG quenching liquid of the present application, raw materials of the rust-proof enhancer include the following components by weight: organic-inorganic rust-proof additive 42 parts, pH regulator 38 parts, non-ferrous metal rust-proof agent 8 parts, and antibacterial agent 6 parts.

[0034] The rust-proof enhancer of the PAG quenching liquid of the present embodiment, first, a mixture of triethanolamine, monoethanolamine, isopropanolamine, AMP-95 and dihydroxyethyl cyclohexylamine is injected into a reaction kettle and an appropriate amount of deionized water is added, and the temperature is raised to 80℃ under constant stirring, then dicarboxylic acid, tricarboxylic acid, phytic acid and isomeric decanoic acid are added, and the reaction is carried out for 1 hour under constant stirring, then the remaining deionized water is added, and the temperature is lowered to 35℃, then fatty acid amide and sodium tungstate and non-ferrous metal rust-proof agent are added, and finally the antibacterial agent is added, and the mixture is stirred uniformly and dissolved completely to obtain a light yellow transparent liquid.

[0035] Example Six

[0036] The rust-proof enhancer of the PAG quenching liquid of the present application, raw materials of the rust-proof enhancer include the following components by weight: organic-inorganic rust-proof additive 42 parts, pH regulator 38 parts, non-ferrous metal rust-proof agent 8 parts, and antibacterial agent 6 parts.

[0037] The rust-proof enhancer of the PAG quenching liquid of the present embodiment, first, a mixture of triethanolamine, monoethanolamine, isopropanolamine, AMP-95 and dihydroxyethyl cyclohexylamine is injected into a reaction kettle and an appropriate amount of deionized water is added, and the temperature is raised to 80℃ under constant stirring, then dicarboxylic acid, tricarboxylic acid, phytic acid and isomeric decanoic acid are added, and the reaction is carried out for 1 hour under constant stirring, then the remaining deionized water is added, and the temperature is lowered to 35℃, then fatty acid amide and sodium tungstate and non-ferrous metal rust-proof agent are added, and finally the antibacterial agent is added, and the mixture is stirred uniformly and dissolved completely to obtain a light yellow transparent liquid.

[0038] In the above examples, the organic-inorganic rust-proof additive is a mixture of dicarboxylic acid, tricarboxylic acid, phytic acid, isomeric decanoic acid, fatty acid amide or fatty acid amine salt and sodium tungstate; the pH regulator is an organic amine pH regulator; the pH regulator is a mixture of triethanolamine, monoethanolamine, isopropanolamine, AMP-95 and dihydroxyethyl cyclohexylamine; the non-ferrous metal rust-proof agent is a mixture of benzotriazole, methyl benzotriazole sodium salt and magnesium-aluminum corrosion inhibitor DX5819; and the antibacterial agent is a mixture of BK, MBM and IPBC.

[0039] The rust-proof enhancer of Example One is added to the PAG quenching liquid, and the test is carried out according to the existing conventional method, and the test results are as follows:

[0040]

[0041] Finally, it is to be explained that the above embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the purpose and scope of the present application, and all of them should be covered in the scope of the claims of the present application.

Claims

1. A rust-preventive enhancer for PAG quenching liquid, characterized by comprising: The raw materials of the rust-proof reinforcing agent include the following components in parts by weight: 40-45 parts of organic-inorganic rust-proof additive, 35-40 parts of pH adjusting agent, 5-10 parts of non-ferrous metal rust-proof agent, and 5-10 parts of antibacterial agent, wherein the organic-inorganic rust-proof additive is a mixture of dicarboxylic acid, tricarboxylic acid, phytic acid, isomeric decanoic acid, sodium tungstate, fatty acid amide or fatty amine salt; the pH adjusting agent is a mixture of triethanolamine, monoethanolamine, isopropanolamine, AMP-95 and dihydroxyethyl cyclohexylamine; the non-ferrous metal rust-proof agent is a mixture of benzotriazole, methyl benzotriazole sodium salt and magnesium-aluminum corrosion inhibitor DX5819, and the antibacterial agent is a mixture of BK, MBM and IPBC.

2. The rust-preventive enhancer for PAG quenching liquid according to claim 1, characterized by: The pH adjusting agent is an organic amine pH adjusting agent.

3. The rust-preventive enhancer for PAG quenching liquid according to claim 1, characterized by: The organic-inorganic rust-proof additive is 42 parts, the pH adjusting agent is 37 parts, the non-ferrous metal rust-proof agent is 7 parts, and the antibacterial agent is 8 parts.

4. The method of producing a rust-preventive enhancer for PAG quenching liquid according to claim 1, characterized by: The method comprises the following steps: mixing the pH adjusting agent with a proper amount of deionized water, heating to 70-90℃ under constant stirring, then adding dicarboxylic acid, tricarboxylic acid, phytic acid and isomeric decanoic acid, fully reacting under constant stirring for 0.9-1.2 hours, adding deionized water to cool to 30-50℃, then adding a mixture of fatty acid amide or fatty amine salt and sodium tungstate and the non-ferrous metal rust-proof agent, and finally adding the antibacterial agent and stirring uniformly.

Images