CN113980727A

CN113980727A - Durable environment-friendly wear-resistant antirust cutting fluid and preparation method thereof

Info

Publication number: CN113980727A
Application number: CN202111236356.1A
Authority: CN
Inventors: 刘佐华
Original assignee: Xiamen Fugang Industry And Trade Co ltd
Current assignee: Xiamen Fugang Industry And Trade Co ltd
Priority date: 2021-10-22
Filing date: 2021-10-22
Publication date: 2022-01-28
Anticipated expiration: 2041-10-22
Also published as: CN113980727B

Abstract

The application relates to the field of cutting fluid, and particularly discloses a durable environment-friendly wear-resistant antirust cutting fluid and a preparation method thereof. The durable environment-friendly anti-wear antirust cutting fluid is prepared from the following raw materials in parts by weight: 15-20 parts of glycerol; 23-28 parts of deionized water; 2-3.5 parts of sulfurized oleic acid; 12.5-17 parts of a wetting agent; 9.5-15 parts of an antirust agent; 4.5-7.5 parts of an antibacterial preservative; the wetting agent comprises at least one of polyethylene glycol octyl phenyl ether, fatty acid soap salt and sodium diisooctyl succinate sulfonate; the rust inhibitor comprises at least one of molybdate, dipropyl glycol methyl ether alkanolamide and inositol hexaphosphate. The preparation method comprises the following steps: weighing the raw materials in proportion, and uniformly blending to obtain the finished cutting fluid. The durable environment-friendly anti-wear and anti-rust cutting fluid has better lubricating, durable, anti-rust and antibacterial properties, and has the advantage of fully meeting the current processing requirements.

Description

Durable environment-friendly wear-resistant antirust cutting fluid and preparation method thereof

Technical Field

The application relates to the field of cutting fluid, in particular to durable anti-wear and anti-rust cutting fluid and a preparation method thereof.

Background

In metal cutting and grinding processes, cutting fluid is usually used to cool and lubricate the tool and the workpiece, so as to reduce the friction between the tool and the chip and the processed surface, reduce the surface temperature of the friction part between the tool and the workpiece blank, reduce the tool wear, improve the surface quality of the workpiece, and improve the cutting and processing performance of the workpiece material.

At present, along with the development of the whole technology of the mechanical industry, the cutting speed of a machine tool is higher, the cutting temperature is higher, and meanwhile, new processes are continuously generated to adapt to the processing of new materials, and the new processes need matched high-performance cutting fluid to meet the processing requirements in various aspects, so that the performance of the cutting fluid in various aspects such as lubrication, cooling, cleaning, rust prevention, durability, environmental protection and the like can meet higher standards, and the currently adopted cutting fluid is difficult to meet the requirements.

Disclosure of Invention

In order to enable the cutting fluid to meet the current processing requirement, the application provides a durable environment-friendly anti-wear and anti-rust cutting fluid.

In a first aspect, the application provides a durable environment-friendly antiwear antirust cutting fluid, which adopts the following technical scheme:

a durable environment-friendly type antiwear and antirust cutting fluid is prepared from the following raw materials in parts by weight:

15-20 parts of glycerol;

23-28 parts of deionized water;

4.5-6.5 parts of sulfurized oleic acid;

12.5-17 parts of a wetting agent;

9.5-15 parts of an antirust agent;

4.5-7.5 parts of an antibacterial preservative;

the wetting agent comprises at least one of polyethylene glycol octyl phenyl ether, fatty acid soap salt and sodium diisooctyl succinate sulfonate;

the rust inhibitor comprises at least one of molybdate, dipropyl glycol methyl ether alkanolamide and inositol hexaphosphate.

By adopting the technical scheme, the defect of low lubricating property of the aqueous cutting fluid taking glycerol as a matrix is overcome by matching the wetting agent with the glycerol, and the advantages of good cooling property and cleaning property of the aqueous cutting fluid are kept, so that the cutting fluid has the advantages of the aqueous cutting fluid and the oily cutting fluid, and the overall performance is improved. The sulfurized oleic acid is added as the extreme pressure wear-resisting agent, so that the cutting fluid can be recycled for multiple times, and the working maintenance time of the cutting fluid is greatly prolonged; and moreover, the problem that the cutting fluid deteriorates and smells after being used for a period of time is solved by adding the antibacterial preservative, namely, the long-acting use of the cutting fluid is really realized by matching the sulfurized oleic acid with the antibacterial preservative, and the current processing requirements can be fully met.

The polyethylene glycol octyl phenyl ether, the fatty acid soap salt and the sodium diisooctyl succinate sulfonate are used as wetting agents, and the wetting agents have good wetting performance, are beneficial to reducing the surface tension of the cutting fluid, so that the cutting fluid can form a lubricating film on the surface of metal, reduce the friction coefficient, inhibit the generation of built-up edge, further improve the roughness of the processed surface and improve the durability of a cutter.

The water-soluble molybdate, the dipropyl glycol methyl ether alkanolamide and the inositol hexaphosphate are used as the antirust agents, so that the antirust performance of the antirust agents can be fully exerted, the antirust agents can be well matched with other components in the cutting fluid, and the corrosion of workpieces and machine tools in the machining process can be effectively inhibited.

Preferably, the wetting agent comprises the following components in parts by weight based on the total weight of the wetting agent: 4-5.5 parts of polyethylene glycol octyl phenyl ether; 3.5-4.5 parts of fatty acid soap salt; 5-6.5 parts of sodium diisooctyl succinate sulfonate.

By adopting the technical scheme, the polyethylene glycol octyl phenyl ether, the fatty acid soap salt and the sodium diisooctyl succinate sulfonate are compounded and cooperated, so that the lubricating property of the cutting fluid is more excellent, and the lubricating property of the cutting fluid is obviously improved.

Preferably, the antirust agent comprises the following components in parts by weight based on the total weight of the antirust agent: 3-5 parts of molybdate; 5-6.5 parts of dipropyl glycol methyl ether alkanolamide; and 1.5-2.5 parts of phytic acid ester.

By adopting the technical scheme, the molybdate, the dipropyl glycol methyl ether alkanolamide and the inositol hexaphosphate are cooperated and cooperated, so that the cutting fluid can have a good antirust effect for a long time.

Preferably, the antibacterial preservative comprises at least one of calcium propionate, nano bamboo charcoal powder and nano titanium dioxide.

By adopting the technical scheme, the calcium propionate, the nano bamboo charcoal powder and the nano titanium dioxide are used as the antibacterial preservative, and the antibacterial deodorization resistance of the antibacterial preservative is utilized, so that not only can the bacterial breeding of the cutting fluid in the using process be inhibited, but also the deodorization period of the cutting fluid can be prolonged through the deodorization characteristic, the corrosion and odor can be prevented, and the service life of the cutting fluid can be fully prolonged.

Preferably, the antibacterial preservative comprises the following components in parts by weight based on the total weight of the antibacterial preservative: 0.5-1.5 parts of calcium propionate; 1.5-2.5 parts of nano bamboo charcoal powder and 2.5-3.5 parts of nano titanium dioxide.

By adopting the technical scheme, the nano titanium dioxide fully plays a role in bacteriostasis, the nano bamboo charcoal powder plays a role in deodorization, the calcium propionate is antiseptic and bacteriostatic, and the three are matched, so that the deterioration time of the cutting fluid is further prolonged, and the performance of the cutting fluid is enhanced.

Preferably, the nano bamboo charcoal powder is silver chloride coated nano bamboo charcoal powder.

By adopting the technical scheme, the nano bamboo charcoal powder coated with silver chloride is used, the nano bamboo charcoal powder is protected in the early stage of the use of a new cutting fluid, the silver chloride coating is gradually worn along with the use of the cutting fluid, and the nano bamboo charcoal powder is adsorbed and deodorized after being exposed successively, namely, the coating treatment is carried out, so that the control on the action time of the nano bamboo charcoal powder is realized, the nano bamboo charcoal powder mainly plays a role after the cutting fluid is used for one section, the effect of delaying the action is achieved, the effective action duration of the nano bamboo charcoal powder is prolonged, and the service life of the cutting fluid is further prolonged. In addition, silver chloride is adopted for coating, silver ions released in the cutting fluid can also play a certain antibacterial effect, and the antibacterial performance of the cutting fluid is further improved.

Preferably, the preparation process of the silver chloride coated nano bamboo charcoal powder comprises the following steps:

the method comprises the following steps: adding dilute hydrochloric acid into a silver nitrate solution to obtain a mixed solution;

step two: and coating and drying the nano bamboo charcoal powder in a fluidized bed coating machine by using the mixed solution, and then screening to obtain the silver chloride coated nano bamboo charcoal powder.

By adopting the technical scheme, the fluidized bed coating machine is utilized to coat the nano bamboo charcoal powder, so that the formed silver chloride coated nano bamboo charcoal powder has round and smooth particle shape, uniform particle size, higher yield and stable performance. And because the thickness of the formed silver chloride coating layer has certain difference, the loss of the silver chloride coating layer also has difference when in use, the effect of prolonging the effective action time of the nano bamboo charcoal powder is favorably achieved, and the preparation method is simple and efficient.

In a second aspect, the application provides a preparation method of a durable environment-friendly type antiwear and antirust cutting fluid, which adopts the following technical scheme:

a preparation method of a durable environment-friendly wear-resistant antirust cutting fluid comprises the steps of weighing raw materials in proportion, and uniformly blending to obtain a finished product cutting fluid.

By adopting the technical scheme, the preparation method is simple, convenient, practical and convenient to prepare.

In summary, the present application has the following beneficial effects:

1. the wetting agent is matched with the glycerol, so that the defect of low lubricating property of the aqueous cutting fluid taking the glycerol as a matrix is overcome, and the advantages of good cooling property and cleaning property of the aqueous cutting fluid are retained, so that the cutting fluid has the advantages of the aqueous cutting fluid and the oily cutting fluid at the same time, and further matched use of sulfurized oleic acid serving as an extreme pressure wear-resisting agent and an antibacterial preservative realizes long-term use of the cutting fluid, the performance of the cutting fluid is integrally improved, and the current processing requirement can be fully met;

2. the polyethylene glycol octyl phenyl ether, the fatty acid soap salt and the sodium diisooctyl succinate sulfonate are used as wetting agents, and the wetting agents have good wetting performance, so that the surface tension of the cutting fluid is reduced, the cutting fluid can form a lubricating film on the surface of metal, the friction coefficient is reduced, the generation of built-up edge is inhibited, the roughness of the processed surface is improved, and the durability of a cutter is improved;

3. the nano bamboo charcoal powder coated with silver chloride is used for protecting the nano bamboo charcoal powder in the early stage of use of a new cutting fluid, the silver chloride coating layer is gradually worn along with the use of the cutting fluid, and the nano bamboo charcoal powder is adsorbed and deodorized after being exposed sequentially, so that the effect of delaying the effect of the nano bamboo charcoal powder is achieved, the effective action duration of the nano bamboo charcoal powder is prolonged, and the service life of the cutting fluid is further prolonged; in addition, silver ions released by the silver chloride can also play a certain antibacterial effect, and the antibacterial performance of the cutting fluid is further improved.

Detailed Description

The present application will be described in further detail with reference to examples and comparative examples.

The sodium diisooctyl succinate sulfonate related in the following contents is purchased from Jiangxi Jinhai New energy science and technology Co., Ltd, the nano bamboo charcoal powder is purchased from Shanghai Hai Nuo charcoal Co., Ltd, the molybdate is sodium molybdate of Chang di chemical industry Co., Ltd, and the rest raw materials are common commercially available products.

Preparation example of silver chloride coated nano bamboo charcoal powder

Preparation example 1

The preparation process of the silver chloride coated nano bamboo charcoal powder comprises the following steps:

weighing a saturated silver nitrate solution, calculating the use amount of dilute hydrochloric acid which is required to just generate a precipitate in the silver nitrate solution, weighing 90% of the dilute hydrochloric acid in the calculated amount, adding the diluted hydrochloric acid into the weighed silver nitrate solution, and stirring to obtain a mixed solution;

step two, weighing the nano bamboo charcoal powder, adding the weighed nano bamboo charcoal powder serving as a seed crystal into a fluidized bed coating machine, and spraying the mixed solution obtained in the step one onto the nano bamboo charcoal powder in an atomizing mode by adopting a bottom spraying coating mode, wherein the material temperature of the fluidized bed coating machine is set to be 35 ℃, the pumping speed of a peristaltic pump is 15g/min, the atomizing pressure is 0.1MPa, the aperture of a spray gun opening is 1mm, and the air intake is set to be 750m³The air inlet temperature is set to be 55 ℃, liquid is continuously sprayed until the mixed liquid is completely exhausted, and the air inlet volume is reduced to 800m³And h, continuously drying until the material is molded, closing air inlet, taking out and screening to obtain the nano bamboo charcoal powder coated with the silver chloride.

Preparation example 2

step one, weighing a saturated silver nitrate solution and nano bamboo charcoal powder, mixing the nano bamboo charcoal powder into the weighed saturated silver nitrate solution, and stirring uniformly to obtain a mixed solution;

and step two, calculating the dosage of dilute hydrochloric acid which is required to be just precipitated in the silver nitrate solution, weighing the dilute hydrochloric acid with the calculated dosage of 90%, adding the dilute hydrochloric acid into the mixed solution while stirring, simultaneously heating the mixed solution until the mixed solution is evaporated to dryness to obtain a crystal, and carrying out negative pressure screening on the crystal to obtain the silver chloride coated nano bamboo charcoal powder.

Examples

Example 1

The durable environment-friendly type antiwear and antirust cutting fluid comprises the raw materials and the corresponding weight shown in Table 1, and the preparation method comprises the following specific steps: weighing the raw materials in proportion, and uniformly blending to obtain the finished cutting fluid.

Examples 2 to 3

The difference between the durable environment-friendly type antiwear and antirust cutting fluid and the embodiment 1 is that the raw materials and the corresponding weight thereof are shown in Table 1.

TABLE 1 examples 1-3 raw material compositions and weights (kg)

Examples 4 to 8

The difference between the durable environment-friendly type anti-wear and anti-rust cutting fluid and the embodiment 2 is that the composition of the anti-bacterial and anti-corrosion agent and the corresponding weight are shown in Table 2.

TABLE 2 compositions and weights (kg) of antimicrobial preservatives in examples 4-7

Example 9

A durable environment-friendly type abrasion-resistant and rust-proof cutting fluid, which is different from the embodiment 4 in that the nano bamboo charcoal powder is silver chloride coated nano bamboo charcoal powder prepared in the preparation example 1.

Example 10

A durable environment-friendly type abrasion-resistant and rust-proof cutting fluid, which is different from the embodiment 4 in that the nano bamboo charcoal powder is silver chloride coated nano bamboo charcoal powder prepared in the preparation example 2.

Example 11

The difference between the durable environment-friendly wear-resistant antirust cutting fluid and the embodiment 4 is that the raw material also comprises nano silver chloride powder, the nano silver chloride powder is obtained by blending, heating, evaporating and grinding saturated silver nitrate solution and dilute hydrochloric acid, wherein the dosage of the saturated silver nitrate solution and the dosage of the dilute hydrochloric acid are the same as the dosage of the nano bamboo charcoal powder coated with silver chloride in the preparation embodiment 8.

Examples 12 to 16

A durable environment-friendly anti-wear and anti-rust cutting fluid is different from that in example 4 in that the composition of a wetting agent and the corresponding weight thereof are shown in Table 3.

TABLE 3 compositions and weights (kg) of antimicrobial preservatives in examples 12-16

Examples 17 to 21

A durable, environment-friendly, wear-resistant, and rust-preventive cutting fluid, which is different from that of example 12, is shown in Table 4, wherein the composition of the rust-preventive agent and the weight thereof are shown.

TABLE 4 compositions and weights (kg) of antimicrobial preservatives in examples 17-21

Comparative example

Comparative example 1

The antirust agent is different from the antirust agent in example 2 in that raw materials of the antirust agent comprise 18kg of glycerin, 15kg of sodium dodecyl benzene sulfonate, 12kg of sodium carbonate and 25kg of deionized water.

Performance test

Test-antibacterial test

A Water-based cutting fluid antibacterial performance Test platform is established in a Test room according to ASTM D3946-92 Standard Test Methods for Evaluating the bacteriological Resistance of Water-soluble Metalworking Fluids.

Test subjects: cutting fluids obtained in examples 1-11 and comparative example 1.

The test method comprises the following steps: firstly, 900mL of the cutting fluid prepared in each example and comparative example is added into a 1L beaker, and 100mL of cultured strains and nutrient substances required by microorganisms such as 10g of scrap iron, corn starch, casein and the like are added and stirred uniformly. The beaker was placed in a 30C thermostatic waterbath and air was introduced into the sample. 7d is taken as 1 cycle, aeration is carried out for 5d every cycle, and gas is stopped for 2d, and sterile water is supplemented in the process to compensate loss caused by evaporation. The pH was measured periodically and changes in appearance were recorded, while the total number of bacterial and fungal colonies in the samples was measured using the SANI-CHECK discs of the usa. The total bacterial colony count of the strain used in the test should reach 10⁷More than cfu/mL, the total number of fungus colonies should reach 10²cfu/mL or more. The sample deterioration index is that the total number of bacteria is more than 10⁷cfu/mL, total number of fungi > 10²cfu/mL. The time required for the sample to deteriorate was recorded to table 5.

Test II abrasion resistance test

The maximum non-seizure load (P) of the cutting fluids prepared in examples 1-3 and comparative example 1 was determined according to GB/T3142-2019 "four-ball method for measuring Lubricant bearing Capacity_B/N), the specific measurement results are shown in table 5.

Test triple wetting Performance test

The cutting fluids obtained in examples 1-4, 12-16 and comparative example 1 were subjected to surface tension measurement according to section 5.5 of GB/T6144-.

Test four anti-rust Performance test

The cutting fluids obtained in examples 1-3, 12, 17-21 and comparative example 1 were subjected to a single-chip, laminated rust-preventive test with reference to section 5.7 of GB/T6144-.

In the single-plate test, the cast iron pieces were observed every 1 hour after 24 hours of continuous test in an incubator until the appearance of rust was observed, and the time was recorded to Table 5.

In the lamination test, a plurality of groups of samples are arranged, two groups of test pieces are taken out every 0.5h after continuous test for 4h in a constant temperature box, the test pieces are opened, absorbent cotton is dipped in absolute ethyl alcohol to erase the test solution, whether two lamination surfaces are corroded and obviously overprinted within 1mm of the edge of the test piece is immediately observed, the corrosion or obvious overprinting middle-stop test is observed on any group of test pieces, and the time is recorded to a table 5.

TABLE 5 Performance test

By combining examples 1-3, comparative example 1 and table 5, it can be seen that the cutting fluid prepared by the scheme of the application has significantly improved antibacterial property, wear resistance, wettability and rust resistance; in addition, according to the actual use comparison under the use conditions of the same machine tool, workpiece, environment and the like, the grinding period is prolonged by at least one time, the roughness of the processed surface is obviously reduced, and the rust spots are also obviously reduced when the cutting fluid is adopted. The defect that the lubricating performance of the aqueous cutting fluid taking glycerol as a matrix is low is overcome by matching the wetting agent with the glycerol, and the advantages of good cooling performance and cleaning performance of the aqueous cutting fluid are retained, so that the cutting fluid has the advantages of the aqueous cutting fluid and the oily cutting fluid, and the overall performance is improved. The sulfurized oleic acid is added as the extreme pressure wear-resisting agent, so that the cutting fluid can be recycled for multiple times, and the working maintenance time of the cutting fluid is greatly prolonged; and moreover, the problem that the cutting fluid deteriorates and smells after being used for a period of time is solved by adding the antibacterial preservative, namely, the long-acting use of the cutting fluid is really realized by matching the sulfurized oleic acid with the antibacterial preservative, and the current processing requirements can be fully met.

It can be seen from the combination of the embodiment 2, the embodiments 4 to 8 and the table 5 that the calcium propionate, the nano bamboo charcoal powder and the nano titanium dioxide according to the mixture ratio recorded in the present application are used as the antibacterial preservative, and have more excellent antibacterial and antiseptic properties compared with the single use of the nano titanium dioxide, because the nano titanium dioxide can play a role in bacteriostasis, the nano bamboo charcoal powder plays a role in deodorization, and the calcium propionate plays a role in antisepsis and bacteriostasis, and the antibacterial properties of the cutting fluid are further improved through the cooperation and synergy of the three.

It can be seen from the combination of examples 4 and 9 and table 5 that the nano bamboo charcoal powder coated with silver chloride by the fluidized bed coater is more helpful to prolong the deterioration time of the cutting fluid than the nano bamboo charcoal powder directly, the antibacterial performance of the cutting fluid is further improved, because the nano bamboo charcoal powder coated by the silver chloride is used, protecting the nanometer bamboo charcoal powder in the early stage of new cutting fluid usage, gradually wearing the silver chloride coating layer along with the usage of the cutting fluid, adsorbing and deodorizing after the nanometer bamboo charcoal powder is exposed, namely, the control of the action time of the nano bamboo charcoal powder is realized through coating treatment, so that the nano bamboo charcoal powder can continuously act after the cutting fluid is used for a period of time, the effect of delaying the action is achieved, the effective action duration of the nano bamboo charcoal powder is prolonged, and the service life of the cutting fluid is further prolonged. In addition, silver chloride is adopted for coating, silver ions released in the cutting fluid can also play a certain antibacterial effect, and the antibacterial performance of the cutting fluid is further improved.

It can be seen from the combination of examples 9-11 and table 5 that the silver chloride coated nano bamboo charcoal powder coated by the fluidized bed coater has better antibacterial performance because the prepared silver chloride coated nano bamboo charcoal powder has round and smooth particle shape, uniform particle size, and more compact and wear-resistant silver chloride layer, and can effectively achieve the effect of delaying the action of the nano bamboo charcoal powder and further prolong the service life of the cutting fluid. Comparing the performance data of example 10 with those of examples 8 and 9, it can be proved that the antibacterial performance of the cutting fluid is improved mainly by matching with the nano bamboo charcoal powder, i.e. formed by the coating structure, and the improvement of antibacterial performance by adding silver ions is limited.

It can be seen from the combination of examples 4 and 12-16 and table 5 that the cooperation of the octyl phenyl polyethylene glycol ether, the fatty acid soap salt and the sodium diisooctyl succinate sulfonate according to the ratio described in the present application enables the cutting fluid to obtain more excellent wetting performance, and the lubricating performance of the cutting fluid is obviously improved.

It can be seen from the combination of examples 12 and 17-21 and table 5 that the molybdate, dipropyl glycol methyl ether alkanolamide and inositol hexaphosphate according to the ratio recorded in the present application cooperate with each other to further improve the rust prevention performance, so that the cutting fluid can have a better rust prevention effect for a long time.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims

1. The durable environment-friendly type antiwear and antirust cutting fluid is characterized by being prepared from the following raw materials in parts by weight:

15-20 parts of glycerol;

23-28 parts of deionized water;

2-3.5 parts of sulfurized oleic acid;

12.5-17 parts of a wetting agent;

9.5-15 parts of an antirust agent;

4.5-7.5 parts of an antibacterial preservative;

2. The durable environment-friendly type antiwear and antirust cutting fluid according to claim 1, wherein: based on the total weight of the wetting agent, the wetting agent comprises the following components in parts by weight: 4-5.5 parts of polyethylene glycol octyl phenyl ether; 3.5-4.5 parts of fatty acid soap salt; 5-6.5 parts of sodium diisooctyl succinate sulfonate.

3. The durable environment-friendly type antiwear and antirust cutting fluid according to claim 1, wherein: based on the total weight of the antirust agent, the antirust agent comprises the following components in parts by weight: 3-5 parts of molybdate; 5-6.5 parts of dipropyl glycol methyl ether alkanolamide; and 1.5-2.5 parts of phytic acid ester.

4. The durable environment-friendly type antiwear and antirust cutting fluid according to claim 1, wherein: the antibacterial preservative comprises at least one of calcium propionate, nano bamboo charcoal powder and nano titanium dioxide.

5. The durable environment-friendly type anti-wear and anti-rust cutting fluid according to claim 4, characterized in that: based on the total weight of the antibacterial preservative, the antibacterial preservative comprises the following components in parts by weight: 0.5-1.5 parts of calcium propionate; 1.5-2.5 parts of nano bamboo charcoal powder and 2.5-3.5 parts of nano titanium dioxide.

6. The durable environment-friendly type anti-wear and anti-rust cutting fluid according to claim 5, characterized in that: the nano bamboo charcoal powder is silver chloride coated nano bamboo charcoal powder.

7. The durable environment-friendly type antiwear and antirust cutting fluid according to claim 6, wherein: the preparation process of the silver chloride coated nano bamboo charcoal powder comprises the following steps:

8. The method for preparing the durable environment-friendly type antiwear and antirust cutting fluid as claimed in any one of claims 1 to 7, wherein the raw materials are weighed in proportion and uniformly blended to obtain the finished cutting fluid.