CN114350424A - Metal working fluid maintenance agent and preparation method thereof - Google Patents
Metal working fluid maintenance agent and preparation method thereof Download PDFInfo
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- CN114350424A CN114350424A CN202111545624.8A CN202111545624A CN114350424A CN 114350424 A CN114350424 A CN 114350424A CN 202111545624 A CN202111545624 A CN 202111545624A CN 114350424 A CN114350424 A CN 114350424A
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Abstract
The invention relates to a metal working fluid maintenance agent and a preparation method thereof, wherein the metal working fluid maintenance agent comprises the following raw materials: effective alkali value promoting agent, antirust agent, emulsifier, corrosion inhibitor, bactericide, solubilizer and the balance of water. The metal working fluid maintenance agent adopts a special effective alkali number improver and is compounded with an antirust agent, an emulsifier and a bactericide solubilizer, is used in a working fluid which is used for quickly smelling or smelling and deteriorating and has an overlong emulsion or semisynthesis liquid period, and is periodically added into a machine working fluid according to the mass ratio of 1-5% of the working fluid, so that the service life of the working fluid is effectively prolonged by more than half a year, the generation of waste liquid is reduced, and the use or maintenance cost of the working fluid is reduced.
Description
Technical Field
The invention belongs to the technical field of metal processing, and particularly relates to a maintenance agent of metal processing liquid and a preparation method thereof.
Background
In metalworking fluids, almost all emulsified oils, semi-synthetic fluids contain nutrients required for microbial growth, including mineral oils, vegetable modified synthetic oils, fatty acids, amines, sulfonates, and other organic components. And the emulsified oil and semi-synthetic liquid are diluted by water and are easy to be attacked by microorganisms because of containing water. Although manufacturers of cutting fluids use bactericides for mother solutions of metal working fluids or strive for better biostability when designing formulations, the cutting fluids do not achieve the desired results during use due to the lifetime of the cutting fluid itself or due to improper maintenance by the user during use of the metal working fluid. For example, there are operators who are still in use in the event of emulsion failure, growth of bacteria and odor, with the result that the work piece is rusted, the machine tool is corroded, the environment is polluted, and the like. In the face of this situation, the exchange of liquid can solve the above-mentioned problems from the source. In the past, the cutting fluid needs to be changed once in half a year or a year, but in view of cost and environmental protection pressure, most cutting fluids are actually in operation with bacteria or used beyond normal service life.
In order to prolong the service life of the metal working fluid as much as possible, the prior art uses physical methods and chemical methods. The physical method mainly comprises heat sterilization, ultraviolet irradiation or filtration. Physical methods are not widely used due to their high cost and lack of success.
Chemical methods are the most common and effective methods to extend the useful life of cutting fluids. The common operation is to add bactericide and pH raising agent at the side of the pond, or to combine the bactericide and the pH raising agent. The operation is simple and effective, but poor control can cause worker allergy or corrosion of nonferrous metals, and the durability is within 3 months. The reason for this is that some components of the working fluid are gradually lost or degraded during the use of the metal working fluid, and the system is unbalanced. For example, rust inhibitors and corrosion inhibitors are adsorbed in workpieces and chips to cause a decrease in rust inhibitive performance; the bactericide can be gradually released and decomposed; mineral oil can be thickened and deteriorated continuously along with cutting and shearing; emulsifiers degrade to cause oil separation; the working fluid water hardness continuously surmounts the cutting fluid to layer and the like.
In order to overcome the problems, the invention optimizes the prior chemical method technology, develops a multifunctional metal working fluid maintenance agent, systematically solves the problems by adding the maintenance agent to the side of the tank at regular intervals, prolongs the service life of the working fluid by half a year or even more than one year, meets the processing requirements, can effectively improve the utilization rate of the cutting fluid, reduces the generation of waste liquid, and has good economic benefit.
Disclosure of Invention
In view of the above, the present invention aims to overcome the defects of the prior art, and provide a multifunctional maintenance agent for metal working fluids, which solves the systematic problems of the working fluids, such as reduced rust resistance or corrosion inhibition, mildewing and bacteria growth, oil separation and stratification, high water hardness and the like, which are caused by long-term use, and enables the working fluids to be used for more than 6 months.
A metal working fluid maintenance agent is characterized by comprising the following components: effective alkali value promoting agent, antirust agent, emulsifier, corrosion inhibitor, bactericide, solubilizer and the balance of water.
In one embodiment, the metal working fluid maintenance agent comprises the following components in percentage by weight: 10-40% of an effective base number improver, 10-20% of an antirust agent, 10-25% of an emulsifier, 2-10% of a corrosion inhibitor, 5-15% of a bactericide, 1-10% of a solubilizer and the balance of water.
In one embodiment, the effective base number enhancer is one or more of 2-amino-1-butanol, 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1, 3-propanediol, and 2-amino-2-ethyl-1, 3-propanediol.
In one embodiment, the rust inhibitor is a combination of two or more of cerium nitrate, cerium chloride, potassium methyl silicate, sodium molybdate, and organic dicarboxylic acid.
In one embodiment, the emulsifier is one or a mixture of more of polyisobutylene succinic anhydride derivatives, alcohol ether carboxylic acids, fatty alcohol polyoxyethylene ethers and fatty acid amides. Preferably, the HLB value of the selected surfactant after compounding is 11 +/-1.
In one embodiment, the corrosion inhibitor is one or more of fatty acid polyglycol ether-based phosphate, alkyl phosphoric acid and benzotriazole derivative.
In one embodiment, the antimicrobial agent is a combination of two or more of 7-ethylbicycloalkane, 4- (2-nitrobutyl) -morpholine, 4 '- (2-ethyl-2-nitrocyclopropane) dimorpholine, N' -methylenedimorpholine (MBM), N-butyl-1, 2-isothiazolin-3-one (BBIT), sodium 2-phenylphenol (OPP-Na), 2-methyl-1, 2-benzisothiazol-3-one (MBIT), 1, 2-benzisothiazolin-3-one (BIT).
In one embodiment, the solubilizer is one or a mixture of diethylene glycol, isohexylene glycol and glycerol.
The invention also provides a preparation method of the metal working fluid maintenance agent, which comprises the following steps:
adding an effective base number improver, an antirust agent, an emulsifier, a corrosion inhibitor, a bactericide, a solubilizer, deionized water or distilled water into a reaction vessel, and fully and uniformly stirring at room temperature to 80 ℃ to obtain the metal working fluid maintenance agent.
The cutting fluid maintenance agent has the beneficial effects that:
1. the lubricating oil has wide compatibility with cutting fluid, can be widely applied to machines using emulsion, microemulsion and semisynthetic fluid, and cannot generate great fluctuation on the lubricating property of the cutting fluid. The service life of the cutting fluid can be prolonged by more than 6 months.
2. The method is convenient to use, and can be directly added into the working solution of the machine at the side of the tank according to the mass proportion of 1-5% of the working solution at regular intervals, and the operation is fully circulated for 5-30 minutes.
3. After the maintenance agent is added, the pH value of the cutting fluid is stable for a long time, and the machine table or the workpiece is prevented from rusting and corroding.
4. Can be used as the working fluid with the water hardness of the cutting fluid increased (>800ppm) caused by long-term use of the cutting fluid.
5. Compared with the conventional maintenance agent, the maintenance agent has obvious sterilization and bacteriostasis effects after being added.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the following description. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The invention provides a metal working fluid maintenance agent which is characterized by comprising the following components: effective alkali value promoting agent, antirust agent, emulsifier, corrosion inhibitor, bactericide, solubilizer and the balance of water.
In one embodiment, the metal working fluid maintenance agent comprises the following components in percentage by weight: 10-40% of an effective base number improver, 10-20% of an antirust agent, 10-25% of an emulsifier, 2-10% of a corrosion inhibitor, 5-15% of a bactericide, 1-10% of a solubilizer and the balance of water.
The effective alkali value improver is alcohol amine with alkyl, and comprises one or more of 2-amino-1-butanol, 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1, 3-propanediol, and 2-amino-2-ethyl-1, 3-propanediol. The alcohol amine is partially oleophilic and partially hydrophilic in molecular structure, can be better dispersed in metal working fluid, can effectively improve the pH value of the cutting fluid, inhibit the growth of bacteria, improve the antirust effect and maintain the stability of the working fluid. The conventional effective alkali value increasing agents such as monoethanolamine, diethanolamine, triethanolamine, potassium hydroxide and the like have the defect of poor durability.
The antirust agent is a combination of two or more of cerium nitrate, cerium chloride, methyl potassium silicate, methyl sodium silicate, sodium molybdate and organic dicarboxylic acid. Preferably, the combination of inorganic salt and organic dibasic acid can generate the synergistic effect of a passivation film and an adsorption film, and the antirust property of the metal processing liquid is enhanced.
The emulsifier is one or a mixture of a plurality of polyisobutylene succinic anhydride derivatives, alcohol ether carboxylic acid, fatty alcohol polyoxyethylene ether and fatty acid amide. Preferably, in order to obtain more scientific emulsifying performance, the HLB value of the selected surfactant after compounding is 11 +/-1. Compared with the conventional sodium petroleum sulfonate and zinc naphthenate, the emulsifier provided by the invention has stronger hard water emulsification resistance, and can effectively solve the problems of high water hardness, more floating oil and the like of a working solution caused by long-term use.
The corrosion inhibitor is one or a combination of more of fatty acid polyglycol ether-based phosphate, alkyl phosphoric acid and benzotriazole derivatives. Mainly used for inhibiting or preventing the corrosion of other components to the aluminum alloy or the copper alloy.
The bactericide is a combination of two or more of 7-ethylbicycloalkane, 4- (2-nitrobutyl) -morpholine, 4 '- (2-ethyl-2-nitrocyclopropane) dimorpholine, N' -methylenedimorpholine (MBM), N-butyl-1, 2-isothiazolin-3-one (BBIT), 2-phenylphenol sodium (OPP-Na), 2-methyl-1, 2-benzisothiazole-3-one (MBIT) and 1, 2-benzisothiazolin-3-one (BIT). Preferably, the efficient bactericide and the fungicide are selected to have better compounding effect.
The solubilizer is one or a mixture of diethylene glycol, isohexylene glycol and glycerol, and mainly has the functions of assisting emulsification and solubilization and inhibiting the generation of foams.
The invention also provides a preparation method of the metal working fluid maintenance agent, which comprises the following steps:
adding an effective base number improver, an antirust agent, an emulsifier, a corrosion inhibitor, a bactericide, a solubilizer, deionized water or distilled water into a reaction vessel, and fully and uniformly stirring at room temperature to 80 ℃ to obtain the metal working fluid maintenance agent.
Example 1
The embodiment provides a metal working fluid maintenance agent which comprises the following raw materials in parts by weight: 30% of effective alkali value improver, 15% of antirust agent, 15% of emulsifier, 5% of corrosion inhibitor, 15% of bactericide, 5% of solubilizer and 20% of water.
The effective alkali value promoting agent is 2-amino-1-butanol, 2-amino-2-methyl-1, 3-propanediol, 2-amino-2-ethyl-1, 3-propanediol according to the ratio of 1: 0.5: 1 in combination.
The antirust agent is cerium nitrate and lauric acid, and the weight ratio of the antirust agent to the metal is 0.2: 1 in combination.
The emulsifier is polyisobutylene succinic anhydride derivative, alcohol ether carboxylic acid and fatty acid amide, and the weight ratio of the emulsifier to the emulsifier is 2: 1: 2 in combination.
The corrosion inhibitor is octyl phosphoric acid and a benzotriazole derivative according to the weight ratio of 1: 0.2 combination.
The bactericide is 7-ethylbicycloalkane, 4- (2-nitrobutyl) -morpholine, 2-phenylphenol sodium (OPP-Na) and 2-methyl-1, 2-benzisothiazol-3-one (MBIT) in a ratio of 1: 0.5: 1 in combination.
The solubilizer is diethylene glycol and isohexylene glycol according to a ratio of 1: 1 in combination.
The preparation method of the metal working fluid maintenance agent comprises the following steps:
adding an effective base number improver, an antirust agent, an emulsifier, a corrosion inhibitor, a bactericide, a solubilizer, deionized water or distilled water into a reaction vessel, controlling the temperature at 60 +/-5 ℃, and fully and uniformly stirring to obtain the metal working fluid maintenance agent.
The metal working fluid maintenance agent is added according to 1.2% of the weight of the machine station working fluid once every half month, and is used for working fluid of a centralized fluid supply tank for processing the aluminum-iron frame member by using semisynthetic fluid, so that the rust prevention and corrosion inhibition effects of a workpiece are obviously improved, and the yield is improved by 0.2-0.5%. The floating oil on the surface of the pool liquid is obviously reduced, the surface quality of the cutter and the workpiece meets the processing requirements, and the liquid changing period or the service life of the working liquid is effectively prolonged by more than 8 months. The test is carried out according to GB/T6144-2010 and can be further tested according to other relevant standards in the industry. The technical indexes of the working solution before and after the application of the embodiment are as follows:
example 2
The embodiment provides a metal working fluid maintenance agent which comprises the following raw materials in parts by weight: 20% of effective base number improver, 18% of antirust agent, 20% of emulsifier, 10% of corrosion inhibitor, 10% of bactericide, 12% of solubilizer and 10% of water.
The effective alkali value improver is 2-amino-2-methyl-1, 3-propanediol, 2-amino-2-ethyl-1, 3-propanediol according to the ratio of 1: 1 in combination.
The antirust agent is cerium nitrate, sodium molybdate and undecanedioic acid, and the weight ratio of the antirust agent is 0.2: 0.3: 1 in combination.
The emulsifier is alcohol ether carboxylic acid, fatty acid amide and fatty alcohol-polyoxyethylene ether, and the weight ratio of the emulsifier is 3: 1: 1 in combination.
The corrosion inhibitor is a fatty acid polyglycol ether based phosphate ester, octyl phosphoric acid and a benzotriazole derivative according to a ratio of 1: 1: 0.5 combination.
The bactericide is 4, 4' - (2-ethyl-2-nitrocyclopropane) dimorpholine and 2-methyl-1, 2-benzisothiazol-3-one (MBIT) according to the ratio of 1: 1 in combination.
The solubilizer is diethylene glycol.
The preparation method of the metal working fluid maintenance agent comprises the following steps:
adding an effective base number improver, an antirust agent, an emulsifier, a corrosion inhibitor, a bactericide, a solubilizer, deionized water or distilled water into a reaction vessel, controlling the temperature at 60 +/-5 ℃, and fully and uniformly stirring to obtain the metal working fluid maintenance agent.
The metal working fluid maintenance agent is added according to 1.5% of the weight of the machine station working fluid once every half month, is used for working fluid of a centralized fluid supply tank for processing die-casting aluminum by using emulsion, obviously solves the problems of odor, oil evolution and the like, meets the processing requirements on the surface quality of a cutter and a workpiece, and effectively prolongs the fluid replacement period or the service life of the working fluid by more than half a year. The test is carried out according to GB/T6144-2010 and can be further tested according to other relevant standards in the industry. The technical indexes of the working solution before and after the application of the embodiment are as follows:
example 3
The embodiment provides a metal working fluid maintenance agent which comprises the following raw materials in parts by weight: 35% of effective alkali value improver, 15% of antirust agent, 20% of emulsifier, 1% of corrosion inhibitor, 15% of bactericide, 5% of solubilizer and 9% of water.
The effective alkali value improver is 2-amino-2-methyl-1, 3-propanediol, 2-amino-2-ethyl-1, 3-propanediol according to the ratio of 1: 1 in combination.
The antirust agent is cerium nitrate, methyl potassium silicate and sebacic acid, and the weight ratio of the antirust agent to the components is 0.2: 0.3: 1 in combination.
The emulsifier is polyisobutylene succinic anhydride derivative, fatty alcohol polyoxyethylene ether and fatty acid amide, and the weight ratio of the emulsifier to the emulsifier is 1: 1: 2 in combination.
The corrosion inhibitor is a benzotriazole derivative.
The bactericide is 7-ethylbicyclooxazolidine, 4- (2-nitrobutyl) -morpholine and 2-phenylphenol sodium (OPP-Na) according to the weight ratio of 1: 0.5 combination.
The solubilizer is diethylene glycol and glycerol according to the ratio of 1: 1 in combination.
The preparation method of the metal working fluid maintenance agent comprises the following steps:
adding an effective base number improver, an antirust agent, an emulsifier, a corrosion inhibitor, a bactericide, a solubilizer, deionized water or distilled water into a reaction vessel, controlling the temperature at 60 +/-5 ℃, and fully and uniformly stirring to obtain the metal working fluid maintenance agent.
The metal working fluid maintenance agent is added according to 1.2% of the weight of the machine station working fluid, and is added for 1-2 times every half month, and the maintenance agent is used for a single machine working fluid for processing cast iron by using certain emulsion, and the working fluid is not changed after being used for a year and a half. After the semi-month use, the smell of the working solution is obviously reduced, the bacterial skin or bacterial colony at the dead angle of the pool liquid is killed, the rust prevention of the workpiece is obviously improved, the surface quality of the cutter and the workpiece meets the processing requirement, and the liquid changing period or the service life of the working solution is effectively prolonged by more than 6 months. The test is carried out according to GB/T6144-2010 and can be further tested according to other relevant standards in the industry. The technical indexes of the working solution before and after the application of the embodiment are as follows:
Claims (9)
1. a metal working fluid maintenance agent is characterized by comprising the following components: effective base number promoting agent, antirust agent, emulsifier, corrosion inhibitor, bactericide, solubilizer, deionized water or distilled water.
2. The metal working fluid maintenance agent according to claim 1, wherein the raw materials comprise the following components in parts by weight: 10-40% of an effective base number improver, 10-20% of an antirust agent, 10-25% of an emulsifier, 2-10% of a corrosion inhibitor, 5-15% of a bactericide, 1-10% of a solubilizer and the balance of water.
3. The metal working fluid maintenance agent according to claim 1 or 2, wherein the effective base number increasing agent is one or a combination of 2-amino-1-butanol, 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1, 3-propanediol, and 2-amino-2-ethyl-1, 3-propanediol.
4. The metal working fluid maintenance agent according to claim 1 or 2, wherein the rust preventive agent is a combination of two or more of cerium nitrate, cerium chloride, potassium methyl silicate, sodium molybdate, and organic dicarboxylic acid.
5. The metal working fluid maintenance agent according to claim 1 or 2, wherein the emulsifier is one or a mixture of several of polyisobutylene succinic anhydride derivatives, alcohol ether carboxylic acids, fatty alcohol polyoxyethylene ethers and fatty acid amides. Preferably, the HLB value of the selected surfactant after compounding is 11 +/-1.
6. The metal working fluid maintenance agent according to claim 1 or 2, wherein the corrosion inhibitor is one or a mixture of several of fatty acid polyglycol ether based phosphate ester, alkyl phosphoric acid, and benzotriazole derivative.
7. The metalworking fluid servicing agent according to claim 1 or 2, wherein the bactericide is a combination of two or more of 7-ethylbicycloalkane, 4- (2-nitrobutyl) -morpholine, 4 '- (2-ethyl-2-nitrocyclopropane) dimorpholine, N' -methylenedimorpholine (MBM), N-butyl-1, 2-isothiazolin-3-one (BBIT), sodium 2-phenylphenol (OPP-Na), 2-methyl-1, 2-benzisothiazol-3-one (MBIT), 1, 2-benzisothiazolin-3-one (BIT).
8. The metal working fluid maintenance agent according to claim 1 or 2, wherein the solubilizer is one or a mixture of diethylene glycol, isohexylene glycol and glycerol.
9. A method of preparing a metalworking fluid maintainer according to any of claims 1 to 8, including the steps of: adding an effective base number improver, an antirust agent, an emulsifier, a corrosion inhibitor, a bactericide, a solubilizer, deionized water or distilled water into a reaction vessel, and fully and uniformly stirring at room temperature to 80 ℃ to obtain the metal working fluid maintenance agent.
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| US4033886A (en) * | 1975-01-31 | 1977-07-05 | Suntech, Inc. | Recycleable metalworking liquid |
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Application publication date: 20220415 |