CN114350317A - Grinding fluid and preparation method and application thereof - Google Patents
Grinding fluid and preparation method and application thereof Download PDFInfo
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- CN114350317A CN114350317A CN202111628302.XA CN202111628302A CN114350317A CN 114350317 A CN114350317 A CN 114350317A CN 202111628302 A CN202111628302 A CN 202111628302A CN 114350317 A CN114350317 A CN 114350317A
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- grinding fluid
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses grinding fluid and a preparation method and application thereof, and the grinding fluid comprises the following raw materials: metal etchants, rust inhibitors, abrasives, and relaxers; the metal etchant includes: hexafluorophosphoric acid; the antirust agent is a composition of quinoline and hexaethyl phosphoramidite; the bulking agent comprises at least one of casein powder and sodium caseinate powder. The invention provides the strong-acid grinding fluid capable of preventing the grinding material from caking and stainless steel from rusting by compounding the metal etching agent, the antirust agent, the grinding material and the loosening agent, so that the grinding material can be prevented from caking although being deposited at the bottom of the grinding fluid, and meanwhile, the grinding fluid has an antirust function and is easy to rinse.
Description
Technical Field
The invention belongs to the technical field of metal surface treatment, and particularly relates to grinding fluid and a preparation method and application thereof.
Background
Stainless steel is usually ground during the manufacturing process to obtain a good surface flatness and finish. The grinding is carried out by a complex relative movement of the grinding tool and the processing surface under a certain pressure. The grinding liquid (containing abrasive and auxiliary components) between the grinding tool and the workpiece respectively has mechanical cutting action and physical and chemical actions in relative motion, so that the abrasive can cut off an extremely thin layer of material on the surface of the workpiece, thereby obtaining extremely high dimensional precision and extremely fine surface roughness.
In the polishing process of stainless steel, in order to achieve the effect of rapid planarization, it is usually desirable to use a strongly acidic polishing solution in order to obtain a greater chemical corrosion effect. However, in the strong acid grinding fluid, the grinding material is easily deposited on the bottom of the grinding fluid, so that a layer of hardened lumps similar to cement is generated. The abrasive cannot be stably suspended in the strongly acidic polishing liquid by adding a conventional suspending agent. In addition, the surface of the stainless steel leveled by the strong acid grinding fluid is easy to rust when exposed to the air, thereby causing the batch rejection of products. Aiming at the problem, the related technology adopts malic acid, formic acid, oxalic acid, glycerol, sodium tripolyphosphate, dioctadecyl phosphate, calcium lignosulfonate, barium petroleum sulfonate and the like to prepare the grinding fluid for the stainless steel mirror plate. In the method, the chemical etching action of the organic acid on the stainless steel is poor, so that the grinding effect is not high. Meanwhile, calcium lignosulfonate and barium petroleum sulfonate as rust inhibitors are easy to adhere to the surface of stainless steel, so that the stainless steel can be cleaned only by using a special cleaning agent subsequently. In view of the above problems, the related art also suspends the abrasive in the grinding fluid by adding a suspending agent, but such a suspending agent is only suitable for use in a neutral or weak acid, weak base environment, and the abrasive is still liable to deposit and agglomerate in a strong acid environment.
Therefore, the development of a strong acid grinding fluid capable of preventing the grinding material from caking and stainless steel from rusting is always a problem of concern in the industry.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art described above. The invention provides the grinding fluid which is strong in acidity and can prevent the grinding material from caking and stainless steel from rusting through compounding of a metal etching agent, a rust inhibitor, a grinding material and a loosening agent, so that the grinding material can be prevented from caking although being deposited at the bottom of the grinding fluid, and meanwhile, the grinding fluid has a rust prevention function and is easy to rinse.
The invention also provides a preparation method of the grinding fluid.
The invention also provides application of the grinding fluid on the surface of a metal product.
According to one aspect of the present invention, there is provided a polishing slurry, prepared from: metal etchants, rust inhibitors, abrasives, and relaxers;
the metal etchant includes: hexafluorophosphoric acid;
the antirust agent is a composition of quinoline and hexaethyl phosphoramidite;
the bulking agent comprises at least one of casein powder and sodium caseinate powder.
The grinding fluid of the invention has at least the following beneficial effects:
1. according to the invention, the strong-acid hexafluorophosphoric acid is used, so that the chemical corrosion effect of the grinding fluid on stainless steel is increased, and the grinding efficiency of the grinding fluid is improved. The corrosion effect of the hexafluorophosphoric acid on the stainless steel is stronger than that of hydrofluoric acid, and the grinding efficiency can be obviously improved by a small amount of the hexafluorophosphoric acid. Meanwhile, the volatility of the hexafluorophosphoric acid is far lower than that of hydrofluoric acid and other fluorine-containing acids, and the harm effect on human bodies is weak.
2. The antirust agent has the function that the antirust agent can be adsorbed on the surface of a newly exposed stainless steel base material after grinding, so that the base material is not easy to rust again in the air. The quinoline and the hexaethyl phosphoramidite adopted in the invention are water-soluble substances, and the combination of the substances enables the quinoline and the hexaethyl phosphoramidite to form a layer of invisible dense protective film on the surface of stainless steel, so that the next procedure can be carried out only by simply rinsing with water.
3. Casein in relaxers is a calcium phosphate-containing binding protein that is acid sensitive and precipitates at lower pH.
In some embodiments of the invention, the rust inhibitor has a mass ratio of the quinoline to the hexaethyl phosphoramidite of 1: 1-10. The rust-proof performance of the grinding fluid can be obviously improved by the compound combination of quinoline and the hexaethyl phosphoramidite.
In some embodiments of the invention, the abrasive comprises: at least one of corundum, silicon carbide and boron carbide.
In some embodiments of the present invention, the raw materials for preparing the grinding fluid comprise, by weight: 0.2-2 parts of hexafluorophosphoric acid, 1-5 parts of antirust agent and 25-35 parts of grinding material.
In some embodiments of the invention, the relaxer includes at least one of casein powder and sodium caseinate powder.
The second aspect of the invention provides a preparation method of the grinding fluid.
In some embodiments of the present invention, the method for preparing the polishing slurry comprises the following steps:
s1: dispersing the loosening agent and the abrasive;
s2: and adding the hexafluorophosphoric acid and the rust preventive into the mixed solution dispersed in the step S1, and mixing.
In some embodiments of the invention, the temperature of the dispersion in step S1 is 90 to 100 ℃.
In some embodiments of the present invention, the dispersed solvent in step S1 is water.
The loosening agent and the abrasive are mixed in advance, and then high-temperature water is added, so that the surface of the abrasive is coated with a layer of uniform casein film. After the temperature is reduced, hexafluorophosphoric acid is added, so that casein on the surface of the grinding material is precipitated and separated out to form a special casein film layer. The film layer can effectively prevent the abrasive material from being hardened into blocks after being deposited, so that the abrasive material is loose.
In some embodiments of the invention, the temperature of the mixing in step S2 is 55-60 ℃.
In a third aspect of the invention, the application of the grinding fluid on the surface of a metal product is provided.
The grinding fluid provided by the invention can prevent hardening and caking although the grinding material is deposited at the bottom of the grinding fluid, and meanwhile, the grinding fluid has an antirust function and is easy to rinse.
Detailed Description
The concept and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.
Example 1
The embodiment prepares the grinding fluid, and the specific process is as follows:
preparing 65.5 parts of water by weight, uniformly mixing 20 parts of white corundum, 10 parts of silicon carbide and 2 parts of casein powder, slowly adding the mixture into 90-100 ℃ water, and stirring at constant temperature for 20-30min to completely dissolve the casein powder. And (3) cooling the solution to 55-60 ℃ while keeping stirring, adding 0.5 part of hexafluorophosphoric acid, 1 part of quinoline and 1 part of hexaethyl phosphorous triamide, and naturally cooling to obtain the antirust stainless steel acidic grinding fluid.
Example 2
The embodiment prepares the grinding fluid, and the specific process is as follows:
according to the weight portion, 65 portions of water are prepared, 15 portions of white corundum, 15 portions of boron carbide and 2 portions of casein powder are uniformly mixed, then the mixture is slowly added into 95 ℃ water, and the mixture is stirred for 25min at constant temperature, so that the casein powder is completely dissolved. And (3) cooling the solution to 58 ℃ while keeping stirring, adding 1 part of hexafluorophosphoric acid, 1 part of quinoline and 1 part of hexaethyl phosphoramidite, and naturally cooling to obtain the antirust stainless steel acidic grinding fluid.
Comparative example 1
The comparative example prepares a grinding fluid, and the difference between the comparative example and the example is that hexaethyl phosphorous triamide is not added, and the specific process is as follows:
preparing 66.5 parts of water by weight, uniformly mixing 20 parts of white corundum, 10 parts of boron carbide and 2 parts of casein powder, slowly adding the mixture into 95 ℃ water, and stirring at constant temperature for 25min to completely dissolve the casein powder. And (3) cooling the solution to 58 ℃ while keeping stirring, adding 0.5 part of hexafluorophosphoric acid and 1 part of quinoline, and naturally cooling to obtain the antirust stainless steel acid grinding fluid.
Comparative example 2
The comparative example is prepared, and is different from the example in that quinoline is not added, and the specific process is as follows:
preparing 66.5 parts of water by weight, uniformly mixing 20 parts of white corundum, 10 parts of silicon carbide and 2 parts of casein powder, slowly adding the mixture into 95 ℃ water, and stirring at constant temperature for 25min to completely dissolve the casein powder. And (3) cooling the solution to 58 ℃ while keeping stirring, adding 0.5 part of hexafluorophosphoric acid and 1 part of hexaethyl phosphorous triamide, and naturally cooling to obtain the antirust stainless steel acid grinding fluid.
Comparative example 3
The comparative example is used for preparing the grinding fluid, and the difference between the comparative example and the embodiment is that no casein powder is added, and the specific process is as follows:
preparing 68.5 parts of water by weight, uniformly mixing 20 parts of white corundum and 10 parts of silicon carbide, slowly adding the mixture into 95 ℃ water, stirring at constant temperature for 25min, cooling the solution to 58 ℃ while keeping stirring, adding 0.5 part of hexafluorophosphoric acid, 1 part of quinoline and 1 part of hexaethylphosphoric triamide, and naturally cooling to obtain the antirust stainless steel acidic grinding fluid.
Test examples
The test examples tested the effects of the polishing solutions obtained in examples 1-2 and comparative examples 1-3, and the specific test methods were as follows:
(1) corrosion, rust prevention and rinsing performance
Referring to the test methods of corrosivity, rust resistance and rinsing performance in GB/T35759-. The relevant test results are shown in table 1:
(2) bulk property
200g of the prepared grinding fluid is placed in a measuring cylinder with a plug, fully shaken up, then placed for 1 week, and the measuring cylinder with the plug is inverted for 5 times to observe whether a bottom deposition layer is loose or not. If the sedimentary layer has fluidity completely, the sedimentary layer is not hardened and loosened. If the deposit had no flow, sheeting was recorded. The relevant test results are shown in table 1:
TABLE 1 test results
As can be seen from examples 1 and 2 in Table 1, the corrosion resistance of the rust-proof stainless steel acid grinding fluid is strong. It is understood from comparative example 1 and comparative examples 1 and 2 that quinoline and hexaethyl phosphorous triamide effectively improve the rust prevention property of the polishing slurry. As can be seen from comparative example 1 and comparative example 3, the casein powder can increase the loosening property of the deposit layer of the abrasive slurry, thereby preventing the abrasive from being deposited and hardened.
The above description is only an example of the present invention, and should not be taken as limiting the scope of the present invention. Insubstantial changes from the disclosed embodiments, variations from or substitutions to one or more other processes, or other insubstantial changes from the disclosed embodiments, as viewed in light of the above teachings, are intended to be covered by the present invention.
Claims (10)
1. The grinding fluid is characterized in that raw materials for preparation comprise: metal etchants, rust inhibitors, abrasives, and relaxers;
the metal etchant includes: hexafluorophosphoric acid;
the antirust agent is a composition of quinoline and hexaethyl phosphoramidite;
the bulking agent comprises at least one of casein powder and sodium caseinate powder.
2. The polishing solution according to claim 1, wherein the weight ratio of quinoline to hexaethyl phosphoramidite in the rust inhibitor is 1:1 to 10.
3. The abrasive liquid according to claim 1, wherein the abrasive comprises: at least one of corundum, silicon carbide and boron carbide.
4. The polishing solution as set forth in claim 1, wherein the abrasive has a particle size of 2000-3000 mesh.
5. The grinding fluid as claimed in claim 1, wherein the raw materials for preparing the grinding fluid comprise, by weight: 0.2-2 parts of hexafluorophosphoric acid, 1-5 parts of antirust agent and 25-35 parts of grinding material.
6. The grinding fluid as claimed in claim 1, wherein the raw material for preparing the grinding fluid further comprises: and (3) water.
7. A method for producing the polishing slurry according to any one of claims 1 to 6.
8. The method for preparing the polishing slurry according to claim 7, comprising the steps of:
s1: dispersing the loosening agent and the abrasive;
s2: and adding the hexafluorophosphoric acid and the rust preventive into the mixed solution dispersed in the step S1, and mixing.
9. The method for preparing a polishing slurry according to claim 8, wherein the temperature of the dispersion in step S1 is 90 to 100 ℃.
10. Use of the polishing slurry according to any one of claims 1 to 6 on the surface of a metal product.
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| CN202111628302.XA CN114350317B (en) | 2021-12-28 | 2021-12-28 | Grinding fluid and preparation method and application thereof |
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| CN202111628302.XA CN114350317B (en) | 2021-12-28 | 2021-12-28 | Grinding fluid and preparation method and application thereof |
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| CN114350317A true CN114350317A (en) | 2022-04-15 |
| CN114350317B CN114350317B (en) | 2023-08-15 |
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