CN115058716A - Neutral water-based metal cleaning solution - Google Patents
Neutral water-based metal cleaning solution Download PDFInfo
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- CN115058716A CN115058716A CN202210758816.5A CN202210758816A CN115058716A CN 115058716 A CN115058716 A CN 115058716A CN 202210758816 A CN202210758816 A CN 202210758816A CN 115058716 A CN115058716 A CN 115058716A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/16—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions using inhibitors
- C23G1/18—Organic inhibitors
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/24—Cleaning or pickling metallic material with solutions or molten salts with neutral solutions
- C23G1/26—Cleaning or pickling metallic material with solutions or molten salts with neutral solutions using inhibitors
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Detergent Compositions (AREA)
Abstract
The invention discloses a neutral water-based metal cleaning solution which comprises the following components in percentage by weight: 6-8% of organic amine, 4-5% of corrosion inhibitor, 8-10% of surfactant, 1-2% of complexing agent, 5-6% of dispersing agent, 0.1-0.3% of defoaming agent and the balance of water; wherein the organic amine is the combination of at least two of cyclohexyl diethanolamine, N-dodecyl-1, 3-propane diamine or 2-butylamine ethanol. The neutral water-based metal cleaning solution is used for cleaning metal parts before being coated with the anti-rust oil, has strong cleaning capability on organic dirt and water-based dirt on the surfaces of the metal parts, and has short-term anti-rust capability among working procedures; meanwhile, a neutral cleaning solution system is not easy to react with the antirust oil additive, and the residual cleaning solution can be compatible with the antirust oil, so that the water-based metal cleaning solution can be matched with the antirust oil for use on the premise of ensuring the antirust effect of the antirust oil, and the failure of the antirust oil can not be caused when the water-based metal cleaning solution is matched with the antirust oil for use.
Description
Technical Field
The invention relates to a neutral water-based metal cleaning solution.
Background
In the metal processing industry, finished parts are usually sealed by coating with rust preventive oil if medium-and long-term rust prevention is required. Before the antirust oil is coated, metal parts need to be cleaned, cleaning objects mainly comprise metal scraps, iron powder, cutting fluid, cutting oil and the like on the surface of a metal workpiece, and if polar and nonpolar dirt cannot be effectively cleaned and removed, the coating of the antirust oil on the surface of the metal workpiece can be directly influenced, so that the antirust period is greatly shortened. Therefore, the metal workpiece is effectively cleaned before being coated with the rust preventive oil, the surface quality of the product can be improved, and the rust preventive period of the product after being coated with the rust preventive oil can be greatly prolonged.
The types of cleaning agents commonly used at present are: (1) the solvent type cleaning agent is common petroleum hydrocarbon solvent type cleaning agent such as gasoline, diesel oil, normal alkane, isoparaffin, dearomatization and chlorohydrocarbon solvent type cleaning agent, the cleaning agent has strong cleaning capability to various grease dirt (nonpolar dirt) at normal temperature, but has weak cleaning capability to polar dirt such as cutting fluid and the like, and residual water-based dirt is brought into a subsequent antirust oil spraying procedure, so that the subsequent antirust oil coating is influenced, and the antirust period of a metal workpiece is reduced. In addition, solvent-based cleaning agents such as gasoline and diesel oil have a problem of poor safety in use due to their low flash points.
(2) The alkaline water-based metal cleaner generally comprises sodium hydroxide, sodium carbonate, sodium tripolyphosphate, ethylene diamine tetraacetic acid disodium, sodium metasilicate, alcohol amine, organic acid, a surfactant and the like, has strong cleaning capability on organic dirt and water dirt (cutting fluid), and has short-term antirust capability among working procedures. However, when the cleaning agent is applied to a cleaning process before oiling, the subsequent rust-proof period of the rust-proof oil is greatly influenced for the following reasons: on one hand, the cleaning solution remains on the surface of the metal part, and the adsorption of the antirust oil additive on the surface of the workpiece is influenced by inorganic salt residues formed after drying and silicon spot residues generated by the organic silicon defoaming agent, so that the oil film adsorption is uneven, the atmospheric corrosion resistance is poor, and the antirust cycle is greatly shortened; on the other hand, the organic acid derivative in the antirust oil additive has a high acid value, and after alkaline substances such as high-base-number alcohol amine, sodium hydroxide and sodium carbonate in the cleaning solution enter the antirust oil, the organic acid derivative and the alkaline substances react with the antirust oil additive to a certain extent, and gel precipitation can be formed under severe conditions, so that the antirust oil effect is rapidly reduced. In addition, the water-based cleaning agent with strong alkalinity is easy to generate pungent smell when being heated and sprayed, and volatile gas can generate irritation and discomfort to human bodies.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problem that the antirust oil is easy to lose efficacy when the water-based metal cleaning agent is matched with the antirust oil in the prior art, the invention provides a neutral water-based metal cleaning agent used before a metal workpiece is coated with the antirust oil.
The technical scheme is as follows: the neutral water-based metal cleaning solution disclosed by the invention comprises the following components in percentage by weight: 6-8% of organic amine, 4-5% of corrosion inhibitor, 8-10% of surfactant, 1-2% of complexing agent, 5-6% of dispersing agent, 0.1-0.3% of defoaming agent and the balance of water; wherein the organic amine is the combination of at least two of cyclohexyl diethanolamine, N-dodecyl-1, 3-propane diamine or 2-butylamine ethanol.
Wherein the pH value of the neutral water-based metal cleaning solution is 7.5-8.5.
Wherein the corrosion inhibitor is one or a combination of more of n-octanoic acid, iso-octanoic acid, isononanoic acid, neodecanoic acid or benzotriazole. According to the invention, cyclohexyl diethanolamine, N-dodecyl-1, 3-propane diamine and 2-butylamine ethanol are matched with an organic acid corrosion inhibitor, and the cyclohexyl diethanolamine, the N-dodecyl-1, 3-propane diamine and the 2-butylamine ethanol can generate an organic acid ethanolamine salt, so that the cleaned workpiece has short-term antirust capacity in working procedures, namely can be used for antirust in circulation processes after cleaning and drying metal workpieces, and in addition, the cyclohexyl diethanolamine, the N-dodecyl-1, 3-propane diamine and the 2-butylamine ethanol have good oil solubility and weak alkalinity, so that the cleaning solution is neutral and weak in alkalinity, on one hand, the cleaning solution can not react with an antirust oil additive, on the other hand, the service life of a cleaning solution system can be prolonged, and bacteria breeding can be prevented.
The surfactant is a combination of at least two of polyethylene glycol oleate, isomeric tridecanol polyoxyethylene ether and isomeric tridecanol polyoxyethylene polyoxypropylene ether. In the cleaning solution system, polyethylene glycol oleate, isomeric tridecanol polyoxyethylene ether and isomeric tridecanol polyoxyethylene polyoxypropylene ether all have good oil solubility, and meanwhile, the cleaning solution system has good removal capability on nonpolar oil stains on the surface of a metal workpiece.
Wherein the complexing agent is one or more of acrylic acid maleic acid copolymer, acrylic acid styrene copolymer or sulfonated styrene polymer.
Wherein, the dispersant is one or more of diethylene glycol methyl ether, ethylene glycol butyl ether, isohexylene glycol, dipropylene glycol butyl ether or diethylene glycol monohexyl ether. In the cleaning solution system, the complexing agent uses an organic polymer acrylic acid maleic acid copolymer, acrylic acid styrene copolymer or sulfonated styrene polymer, which has good oil solubility and good chelation performance on metal debris and iron powder particles on the surface of a metal workpiece, and the particles are dispersed in the cleaning solution system by a synergistic dispersant, namely diethylene glycol methyl ether, ethylene glycol butyl ether, isohexylene glycol, dipropylene glycol butyl ether or diethylene glycol monohexyl ether, so that the particles can be effectively prevented from forming precipitates again and attaching to the surface of the metal workpiece.
Wherein the defoaming agent is ethylene oxide and propylene oxide block polyether.
The preparation method of the neutral water-based metal cleaning solution specifically comprises the following steps: under the state of stirring at normal temperature, adding the organic amine and the corrosion inhibitor in the formula amount into pure water, and uniformly stirring to obtain a primary premixed solution; when the primary premixed solution is cooled to 10-40 ℃ (the primary premixed solution is formed by mixing organic amine and a corrosion inhibitor, and the temperature of the premixed solution is raised due to heat release caused by acid-base reaction, so that the temperature needs to be cooled to 10-40 ℃), adding the complexing agent in the formula amount into the primary premixed solution, and uniformly stirring to obtain a secondary premixed solution; adding the surfactant and the dispersant in the formula amount into the secondary premixed solution, and uniformly stirring to obtain a tertiary premixed solution; and finally, adding the defoaming agent in the formula amount into the tertiary premixed solution, and uniformly stirring to obtain the neutral water-based metal cleaning solution.
Has the advantages that: the neutral water-based metal cleaning solution is used for cleaning metal parts before being coated with the anti-rust oil, has strong cleaning capability on organic dirt and water-based dirt on the surfaces of the metal parts, and has short-term anti-rust capability among working procedures; meanwhile, a neutral cleaning solution system is not easy to react with the antirust oil additive, and the cleaning solution residues (the cleaning solution residues are substances adsorbed on the surface of a workpiece after cleaning and drying) can be compatible with the antirust oil, namely the cleaning solution residues are oil-soluble substances and can be dissolved in the antirust oil system.
Detailed Description
The technical solution of the present invention is further illustrated below with reference to specific examples.
Example 1
The neutral water-based metal cleaning solution disclosed by the invention comprises the following components in percentage by mass: 6% of cyclohexyl diethanolamine, 2% of N-dodecyl-1, 3-propane diamine, 2% of isononanoic acid, 2% of neodecanoic acid, 0.5% of benzotriazole, 5% of isomeric tridecanol polyoxyethylene ether, 3% of isomeric tridecanol polyoxyethylene polyoxypropylene ether, 4% of diethylene glycol methyl ether, 2% of dipropylene glycol butyl ether, 2% of acrylic styrene copolymer, 0.3% of ethylene oxide propylene oxide block polyether and the balance of pure water.
Example 2
The neutral water-based metal cleaning solution disclosed by the invention comprises the following components in percentage by mass: 6% of cyclohexyl diethanolamine, 2-butylamine ethanol, 2% of n-caprylic acid, 2% of neodecanoic acid, 0.5% of benzotriazole, 5% of polyethylene glycol oleate, 3% of isomeric dodecyl alcohol polyoxyethylene polyoxypropylene ether, 4% of isohexane glycol, 2% of dipropylene glycol butyl ether, 2% of sulfonated styrene polymer, 0.3% of ethylene oxide propylene oxide block polyether and the balance of pure water.
Example 3
The neutral water-based metal cleaning solution disclosed by the invention comprises the following components in percentage by mass: 4% of cyclohexyl diethanolamine, 2% of N-dodecyl-1, 3-propylene diamine, 2% of isooctanoic acid, 2% of neodecanoic acid, 1% of benzotriazole, 6% of polyethylene glycol oleate, 4% of isomeric tridecanol polyoxyethylene ether, 3% of ethylene glycol butyl ether, 2% of dipropylene glycol butyl ether, 1% of acrylic maleic acid copolymer, 0.1% of ethylene oxide propylene oxide block polyether and the balance of pure water.
The preparation method of the neutral water-based metal cleaning solution of the embodiment 1-3 specifically comprises the following steps: under the state of stirring at normal temperature, adding the organic amine and the corrosion inhibitor in the formula amount into pure water, and uniformly stirring to obtain a primary premixed solution; when the primary premixed solution is cooled to 10-40 ℃, adding the complexing agent in the formula amount into the primary premixed solution, and uniformly stirring to obtain a secondary premixed solution; adding the surfactant and the dispersant in the formula amount into the secondary premixed solution, and uniformly stirring to obtain a tertiary premixed solution; and finally, adding the defoaming agent in the formula amount into the tertiary premixed solution, and uniformly stirring to obtain the neutral water-based metal cleaning solution.
Comparative example 1
A neutral water-based metal cleaner comprises the following components in percentage by mass: 1% of monoethanolamine, 7% of triethanolamine, 2% of n-caprylic acid, 2% of neodecanoic acid, 0.5% of benzotriazole, 5% of polyethylene glycol oleate, 3% of isomeric decaol polyoxyethylene polyoxypropylene ether, 4% of isohexanediol, 2% of diethylene glycol monohexyl ether, 2% of sulfonated styrene polymer, 0.3% of ethylene oxide propylene oxide block polyether and the balance of pure water.
Comparative example 2
A neutral water-based metal cleaner comprises the following components in percentage by mass: 6% of cyclohexyl diethanolamine, 2% of N-dodecyl-1, 3-propane diamine, 2% of N-caprylic acid, 2% of neodecanoic acid, 0.5% of benzotriazole, 5% of coconut amine polyoxyethylene ether, 3% of sodium dodecyl benzene sulfonate, 4% of isohexane glycol, 2% of diethylene glycol monohexyl ether, 2% of sulfonated styrene polymer, 0.3% of ethylene oxide and propylene oxide block polyether and the balance of pure water.
Comparative example 3
The water-based metal cleaner comprises the following components in percentage by mass: 7% of cyclohexyl diethanolamine, 5% of 2-butylamine ethanol, 2% of n-caprylic acid, 2% of neodecanoic acid, 0.5% of benzotriazole, 5% of polyethylene glycol oleate, 3% of isomeric deca-alcohol polyoxyethylene polyoxypropylene ether, 4% of isohexanediol, 2% of diethylene glycol monohexyl ether, 2% of sulfonated styrene polymer, 0.3% of ethylene oxide propylene oxide block polyether and the balance of pure water.
The preparation method of the water-based metal cleaning agent in comparative examples 1 to 3 is the same as that of the neutral water-based metal cleaning agent in examples 1 to 3.
The cleaning effects of examples 1-3 and comparative examples 1-3 were verified by JB/T4323.2-1999 test method for Water-based Metal cleaners, and three test pieces were used for each sample for parallel tests.
A No. 45 steel test piece is polished according to SH/T0218 standard and cleaned, then hung by a hook and weighed on a balance to be accurate to 0.1mg, and the weight is expressed by P1.
Soaking the weighed test piece into artificial oil stain which is preheated to the oil immersion temperature for more than 5min, after the temperature of the test piece is the same as that of the oil, lifting the test piece by using a lifter, hanging the test piece on a test piece rack, draining for 20min, scraping oil drops accumulated at the bottom of the test piece, and weighing together with an original hook, wherein the weight is represented by P2. P2-P1 are the oil dip coating amounts of the test pieces.
Fixing the test piece after oil immersion and weighing on a swinging washer by using an original hook, enabling the surface of the test piece to be perpendicular to the swinging direction, respectively immersing the test piece into 3 swinging washing grooves containing 500mL of test solution with the temperature of 50 +/-2 ℃ (the test solution is obtained by mixing cleaning solution and water according to the volume ratio of 1: 20), immediately recording the time, statically immersing for 3min, swinging and washing for 3min, taking out the test piece, swinging and washing for 10 times in 500mL of distilled water with the temperature of 50 +/-2 ℃, taking out the test piece, immediately drying for 30-40 min in an oven with the temperature of 70 +/-2 ℃, taking out the test piece, cooling to the room temperature, and weighing, wherein the weight is represented by P3. P2-P3 indicate the weight of the oil stain to be cleaned. The oil washing rate h is (P2-P3)/(P2-P1). The results are shown in Table 1.
TABLE 1 examples 1 to 3 and comparative examples 1 to 3
As can be seen from Table 1, the cleaning liquids of examples 1 to 3 of the present invention have excellent cleaning effects on oil stains.
The influence degree of the examples 1-3 and the comparative examples 1-3 on the antirust performance of the antirust oil is verified by adopting an SH/T0081 antirust grease salt spray test method, each sample is tested in parallel by using three test pieces, and the antirust oil is dehydrated thin-layer antirust oil.
After being polished and cleaned according to the SH/T0218 standard, the No. 10 steel test piece is respectively immersed into the working solutions of the example 1, the example 2, the example 3, the comparative example 1, the comparative example 2 and the comparative example 3 (the working solution is obtained by diluting a cleaning solution with pure water according to the volume ratio of 1: 20, and the temperature of the working solution is 50 ℃), is immersed for 5min, is taken out and naturally dried, is coated with an anti-rust oil according to the SH/T0218 standard, is subjected to a salt spray test, is evaluated according to the rust grade according to the SH/T0217, and has an experimental result shown in the table 2.
TABLE 2 influence of examples 1 to 3 and comparative examples 1 to 3 on rust inhibitive performance of rust inhibitive oil
As can be seen from Table 2, the rust prevention performance of the workpiece treated by the neutral water-based metal cleaning solution of the examples 1 to 3 and treated by the rust prevention oil is obviously better than the matching effect of the comparative examples 1 to 3 and the rust prevention oil; although the components of the comparative example 3 are not changed, the cleaning solution system becomes alkaline after the use amount of the organic amine is increased, and the corrosion degree of the workpiece coated with the rust preventive oil is still reduced to a certain degree compared with the examples 1-3. The pH value of the neutral water-based metal cleaning solution is 7.5-8.5, the neutral water-based metal cleaning solution is not easy to react with a high-acid-value antirust additive in the antirust oil, so that the service life and the antirust effect of the antirust oil are not influenced, meanwhile, the cleaning solution has a good cleaning and removing effect on dirt such as cutting fluid, cutting oil, super-essential oil, metal chips and the like, the coating quality of the subsequent antirust oil is ensured, inorganic salt and an organic silicon defoaming agent are not contained in a system, the influence of inorganic salt residue and silicon spots on the coating quality of the antirust oil is avoided, the additives in the cleaning solution system have good compatibility with the antirust oil, the adsorption of the antirust additive on the metal surface is not influenced, the antirust effect of the antirust oil is not influenced, and the antirust period is effectively prolonged.
Claims (7)
1. The neutral water-based metal cleaning solution is characterized by comprising the following components in percentage by weight: 6-8% of organic amine, 4-5% of corrosion inhibitor, 8-10% of surfactant, 1-2% of complexing agent, 5-6% of dispersing agent, 0.1-0.3% of defoaming agent and the balance of water; wherein the organic amine is the combination of at least two of cyclohexyl diethanolamine, N-dodecyl-1, 3-propane diamine or 2-butylamine ethanol.
2. The neutral water-based metal cleaning solution as claimed in claim 1, wherein: the pH value of the neutral water-based metal cleaner is 7.5-8.5.
3. The neutral water-based metal cleaning solution as claimed in claim 1, wherein: the corrosion inhibitor is one or a combination of more of n-octanoic acid, iso-octanoic acid, isononanoic acid, neodecanoic acid or benzotriazole.
4. The neutral water-based metal cleaning solution as claimed in claim 1, wherein: the surfactant is a combination of at least two of polyethylene glycol oleate, isomeric tridecanol polyoxyethylene ether and isomeric tridecanol polyoxyethylene polyoxypropylene ether.
5. The neutral water-based metal cleaning solution as claimed in claim 1, wherein: the complexing agent is one or the combination of acrylic acid maleic acid copolymer, acrylic acid styrene copolymer or sulfonated styrene polymer.
6. The neutral water-based metal cleaning solution as claimed in claim 1, wherein: the dispersant is one or more of diethylene glycol methyl ether, ethylene glycol butyl ether, isohexylene glycol, dipropylene glycol butyl ether or diethylene glycol monohexyl ether.
7. The neutral water-based metal cleaning solution as claimed in claim 1, wherein: the defoaming agent is ethylene oxide and propylene oxide block polyether.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115725370A (en) * | 2022-10-25 | 2023-03-03 | 华阳新兴科技（天津）集团有限公司 | Cleaning agent for gas channel of aviation gas turbine engine |
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| JPH09143776A (en) * | 1995-11-14 | 1997-06-03 | Osamu Yumita | Rust removal agent for wheel and its production |
| JP2004244683A (en) * | 2003-02-14 | 2004-09-02 | Neos Co Ltd | Water-soluble metal anticorrosive |
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| CN109487283A (en) * | 2018-12-19 | 2019-03-19 | 长沙艾森设备维护技术有限公司 | Neutral anti-rust water-based cleaning agent and preparation method |
| CN110983348A (en) * | 2019-12-30 | 2020-04-10 | 天津普罗米新材料有限公司 | Neutral rust remover |
-
2022
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| JPH09143776A (en) * | 1995-11-14 | 1997-06-03 | Osamu Yumita | Rust removal agent for wheel and its production |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115725370A (en) * | 2022-10-25 | 2023-03-03 | 华阳新兴科技（天津）集团有限公司 | Cleaning agent for gas channel of aviation gas turbine engine |
| CN115725370B (en) * | 2022-10-25 | 2024-06-07 | 华阳新兴科技（天津）集团有限公司 | Gas channel cleaning agent for aviation gas turbine engine |
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| CN115058716B (en) | 2023-09-08 |
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