CN114350317B - Grinding fluid and preparation method and application thereof - Google Patents
Grinding fluid and preparation method and application thereof Download PDFInfo
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- CN114350317B CN114350317B CN202111628302.XA CN202111628302A CN114350317B CN 114350317 B CN114350317 B CN 114350317B CN 202111628302 A CN202111628302 A CN 202111628302A CN 114350317 B CN114350317 B CN 114350317B
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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
Abstract
The invention discloses a grinding fluid, a preparation method and application thereof, wherein the grinding fluid comprises the following raw materials: metal etchants, rust inhibitors, abrasives, and loosening agents; the metal etchant includes: hexafluorophosphoric acid; the antirust agent is a composition of quinoline and hexaethylphosphorous triamide; the loosening 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 through the compounding among the metal etching agent, the rust inhibitor, the grinding material and the loosening agent, so that the grinding material can be deposited at the bottom of the grinding fluid, but can be prevented from caking, and the grinding fluid has the rust inhibiting function and is easy to rinse.
Description
Technical Field
The invention belongs to the technical field of metal surface treatment, and particularly relates to a grinding fluid and a preparation method and application thereof.
Background
Stainless steel generally requires a grinding treatment of its surface during the manufacturing process in order to obtain a good surface flatness and finish. Grinding is accomplished by complex relative movements of the grinding tool and the work surface under pressure. The grinding liquid (containing grinding material and auxiliary components) between the grinding tool and the workpiece has mechanical cutting action and physical and chemical actions respectively in the relative motion, so that the grinding material 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 grinding of stainless steel, it is often desirable to use a strongly acidic grinding fluid in order to achieve a rapid leveling effect, in order to obtain a greater chemical etching effect. However, in a strongly acidic slurry, the abrasive material easily deposits on the bottom of the slurry, thereby forming a layer of hardened mass similar to cement. By adding a conventional suspending agent, the abrasive cannot be stably suspended in the strongly acidic polishing liquid. In addition, the stainless steel flattened by the strongly acidic grinding fluid is easy to rust when the surface of the stainless steel is exposed to air, so that the product is scrapped in batches. In view of this problem, a stainless steel mirror plate polishing liquid is prepared by using malic acid, formic acid, oxalic acid, glycerol, sodium tripolyphosphate, dioctadecyl phosphate, calcium lignosulfonate, barium petroleum sulfonate and the like in the related art. In the method, the chemical etching effect 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 are used as rust inhibitors to be easily adhered to the surface of stainless steel, so that the stainless steel can be cleaned only by using special cleaning agents in the follow-up process. In view of the above problems, the related art also suspends the abrasive in the polishing slurry by adding a suspending agent, but such suspending agent is only suitable for neutral or weak acid or weak base environments, and the abrasive is still easy to deposit and agglomerate in strong acid environments.
It has been a concern in the industry to develop a strong acidic polishing liquid that prevents the abrasive from caking and stainless steel from rusting.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the prior art described above. Therefore, the invention provides the grinding fluid, and the strong acid grinding fluid capable of preventing grinding materials from caking and stainless steel from rusting is provided through the compounding of the metal etching agent, the rust inhibitor, the grinding materials and the loosening agent, so that the grinding materials are deposited at the bottom of the grinding fluid, but the grinding fluid can avoid caking and caking, and meanwhile, the grinding fluid has the rust inhibiting 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 to the surface of a metal product.
According to one aspect of the present invention, there is provided an abrasive liquid, the raw materials for preparation comprising: metal etchants, rust inhibitors, abrasives, and loosening agents;
the metal etchant includes: hexafluorophosphoric acid;
the antirust agent is a composition of quinoline and hexaethylphosphorous triamide;
the loosening agent comprises at least one of casein powder and sodium caseinate powder.
The grinding fluid provided by the invention has at least the following beneficial effects:
1. according to the invention, the chemical corrosion of the grinding fluid to stainless steel is increased by using the strong acid hexafluorophosphoric acid, so that the grinding efficiency of the grinding fluid is improved. The corrosion of hexafluorophosphoric acid to stainless steel is stronger than that of hydrofluoric acid, and a small amount of hexafluorophosphoric acid can obviously improve the grinding efficiency. Meanwhile, the volatility of hexafluorophosphoric acid is far lower than that of fluoric acid such as hydrofluoric acid, and the effect of the hexafluorophosphoric acid on the human body is weak.
2. The rust inhibitor has the function that the rust inhibitor can be adsorbed on the surface of the stainless steel substrate which is newly exposed after grinding, so that the substrate is not easy to rust again in the air. The quinoline and the hexaethylphosphoramidite adopted in the invention are water-soluble substances, and the combination of the quinoline and the hexaethylphosphoramidite enables the quinoline and the hexaethylphosphoramidite to form a layer of invisible compact protective film on the surface of stainless steel, so that the next procedure can be carried out by simply rinsing with water.
3. Casein in the bulking agent is a phosphorus-calcium-containing binding protein that is acid sensitive and precipitates at low pH.
In some embodiments of the present invention, the mass ratio of the quinoline to the hexaethylphosphoramidite in the rust inhibitor is 1:1-10. The compound combination of quinoline and hexaethylphosphoramidite can obviously improve the rust resistance of the grinding fluid.
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 polishing liquid comprises the following preparation raw materials in parts by weight: 0.2-2 parts of hexafluorophosphoric acid, 1-5 parts of antirust agent and 25-35 parts of abrasive.
In some embodiments of the invention, the loosening agent comprises 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 invention, the method of preparing the polishing slurry comprises the steps of:
s1: dispersing the loosening agent and the abrasive;
s2: and (2) adding the hexafluorophosphoric acid and the antirust agent into the mixed solution after the dispersion in the step (S1) for mixing.
In some embodiments of the invention, the temperature of the dispersion in step S1 is 90-100 ℃.
In some embodiments of the invention, the dispersed solvent in step S1 is water.
The surface of the abrasive is wrapped with a layer of uniform casein film by pre-mixing the loosening agent with the abrasive and then adding the mixture into high-temperature water. After cooling, adding hexafluorophosphoric acid to precipitate casein on the surface of the abrasive to form a special casein film. The film layer can effectively prevent the abrasive from being hardened into a block after being deposited, so that the abrasive 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, there is provided the use of the polishing slurry on the surface of a metal product.
The grinding fluid provided by the invention ensures that the grinding material is deposited at the bottom of the grinding fluid, but can avoid hardening and caking, and has the rust-proof function and easy rinsing.
Detailed Description
The conception and the technical effects produced by the present invention will be clearly and completely described in conjunction with the embodiments below to fully understand the objects, features and effects of the present invention. It is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present invention based on the embodiments of the present invention.
Example 1
The embodiment prepares the grinding fluid by the following specific processes:
according to the weight parts, 65.5 parts of water is prepared, 20 parts of white corundum, 10 parts of silicon carbide and 2 parts of casein powder are uniformly mixed, and then the mixture is slowly added into 90-100 ℃ of water, and the mixture is stirred at constant temperature for 20-30min, so that the casein powder is thoroughly dissolved. While maintaining stirring, cooling the solution to 55-60 ℃, adding 0.5 part of hexafluorophosphoric acid, 1 part of quinoline and 1 part of hexaethylphosphorous triamide, and naturally cooling to obtain the rust-proof stainless steel acid grinding liquid.
Example 2
The embodiment prepares the grinding fluid by the following specific processes:
according to the weight parts, 65 parts of water is prepared, 15 parts of white corundum, 15 parts of boron carbide and 2 parts of casein powder are uniformly mixed, and then the mixture is slowly added into 95 ℃ water, and the mixture is stirred at constant temperature for 25 minutes, so that the casein powder is thoroughly dissolved. While maintaining stirring, cooling the solution to 58 ℃, adding 1 part of hexafluorophosphoric acid, 1 part of quinoline and 1 part of hexaethylphosphorous triamide, and naturally cooling to obtain the rust-proof stainless steel acid grinding liquid.
Comparative example 1
This comparative example prepared a polishing slurry, and this comparative example and example differ in that hexaethylphosphoramidite was not added, and the specific procedure was as follows:
according to the weight parts, 66.5 parts of water is prepared, 20 parts of white corundum, 10 parts of boron carbide and 2 parts of casein powder are uniformly mixed, and then the mixture is slowly added into 95 ℃ water, and the mixture is stirred at constant temperature for 25 minutes, so that the casein powder is thoroughly dissolved. While maintaining stirring, cooling the solution to 58 ℃, adding 0.5 part of hexafluorophosphoric acid and 1 part of quinoline, and naturally cooling to obtain the rust-proof stainless steel acid grinding fluid.
Comparative example 2
The comparative example was prepared as an abrasive liquid, and the comparative example and the example are different in that no quinoline was added, and the specific procedure is as follows:
according to the weight parts, 66.5 parts of water is prepared, 20 parts of white corundum, 10 parts of silicon carbide and 2 parts of casein powder are uniformly mixed, and then the mixture is slowly added into 95 ℃ water, and the mixture is stirred at constant temperature for 25 minutes, so that the casein powder is thoroughly dissolved. While maintaining stirring, cooling the solution to 58 ℃, adding 0.5 part of hexafluorophosphoric acid and 1 part of hexaethylphosphorous triamide, and naturally cooling to obtain the rust-proof stainless steel acid grinding fluid.
Comparative example 3
The comparative example was prepared as a grinding fluid, and the comparative example and the example are different in that casein powder was not added, and the specific process is as follows:
according to the parts by weight, 68.5 parts of water is prepared, 20 parts of white corundum and 10 parts of silicon carbide are uniformly mixed, then the mixture is slowly added into 95 ℃ of water, stirring is carried out for 25 minutes at constant temperature, the temperature of the solution is reduced to 58 ℃ while stirring is maintained, 0.5 part of hexafluorophosphoric acid, 1 part of quinoline and 1 part of hexaethylphosphoramidite are added, and natural cooling is carried out, so that the rust-proof stainless steel acid grinding liquid is obtained.
Test examples
The effect of the polishing liquids obtained in examples 1 to 2 and comparative examples 1 to 3 was tested in this test example, and the specific test method is as follows:
(1) Corrosiveness, rust resistance, rinsing performance
Referring to the testing method of corrosiveness, rust resistance and rinsing performance in GB/T35759-2017 metal cleaning agent, the test solution adopts grinding fluid stock solution. The relevant test results are shown in table 1:
(2) Loosening properties
200g of the prepared grinding fluid is placed in a measuring cylinder with a plug, and after being sufficiently and uniformly shaken, the grinding fluid is placed still for 1 week, and after the measuring cylinder with the plug is inverted for 5 times, whether a bottom deposition layer is loose or not is observed. If the deposited layer is completely flowable, it is indicated that the deposited layer does not harden or loosen. If the deposited layer is not flowable, it is recorded as a hardening. 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 rust inhibitive type acid polishing liquid of stainless steel according to the present invention has a strong corrosion ability. Comparative example 1 and comparative examples 1 and 2 show that the combination of quinoline and hexaethylphosphoramidite is effective in improving rust resistance of the polishing liquid. As is clear from comparative examples 1 and 3, casein powder can increase the looseness of the deposited layer of the polishing liquid, thereby preventing the hardening of the deposited layer of the polishing liquid.
The foregoing description is only of specific embodiments of the invention and is not intended to limit the scope of the invention. Insubstantial changes in certain process technologies, or substitutions of related technologies, or direct or indirect application in other related technical fields are all within the scope of the protection claimed in this application where insubstantial changes made by the present invention are deduced under the teachings of the concepts and embodiments described in this application.
Claims (5)
1. The grinding fluid is characterized in that the preparation raw materials comprise: metal etchants, rust inhibitors, abrasives, and loosening agents;
the metal etchant includes: hexafluorophosphoric acid;
the antirust agent is a composition of quinoline and hexaethylphosphorous triamide;
the loosening agent comprises at least one of casein powder and sodium caseinate powder;
the mass ratio of the quinoline to the hexaethylphosphorous triamide is 1:1-10;
the preparation method of the grinding fluid comprises the following steps:
s1: dispersing the loosening agent and the abrasive;
s2: adding the hexafluorophosphoric acid and the antirust agent into the mixed solution dispersed in the step S1 for mixing;
the abrasive comprises: at least one of corundum, silicon carbide and boron carbide;
the dispersing temperature in the step S1 is 90-100 ℃;
and in the step S2, the temperature of mixing is 55-60 ℃.
2. The slurry of claim 1, wherein the abrasive has a particle size of 2000-3000 mesh.
3. The grinding fluid according to claim 1, wherein the raw materials for preparing the grinding fluid comprise, in parts by weight: 0.2-2 parts of hexafluorophosphoric acid, 1-5 parts of antirust agent and 25-35 parts of abrasive.
4. The polishing slurry according to claim 1, wherein the polishing slurry further comprises: and (3) water.
5. Use of the polishing liquid according to any one of claims 1 to 4 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 CN114350317A (en) | 2022-04-15 |
| CN114350317B true CN114350317B (en) | 2023-08-15 |
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