CN104673473A - Water-based grinding fluid and preparation method thereof - Google Patents

Abstract

The invention discloses a water-based grinding fluid and a preparation method thereof. The water-based grinding fluid is prepared from the following components by weight percent: 6-12% of a lubricating agent, 4-8% of an emulsifier, 1-5% of an antirust agent, 4-18% of a pH value regulating agent and 60-85% of water. The invention further provides a preparation method of the water-based grinding fluid. The preparation method comprises the following steps: firstly adding the water, the emulsifier and the pH value regulating agent to a reaction kettle to fully stir uniformly, adding the lubricating agent to the reaction kettle to fully emulsify and stirring uniformly under the reaction temperature of 25-70 DEG C, adding the antirust agent to the reaction kettle to fully mix, and controlling a pH value of the grinding fluid to be 8-10. The water-based grinding fluid has the advantages of good antirust performance, high integral yield of the grinding procedure, good lubricating property and easiness in subsequent cleaning.

Description

Water-based grinding fluid and preparation method thereof

technical field

The invention relates to a water-based grinding fluid, in particular to a water-based grinding fluid for grinding and polishing the surface of an aluminum product and a preparation method thereof.

Background technique

Aluminum and aluminum alloy products are increasingly widely used in civil industries such as aviation industry, lamps, optical instruments, and accessories. In order to improve the smoothness and glossiness of the surface of aluminum and aluminum products, it is often necessary to grind and polish the aluminum products before aluminum anodizing treatment, so as to ensure the high mirror surface quality of aluminum after anodizing treatment.

Grinding fluid plays a vital role in the grinding and polishing process. The preparation of grinding fluid is an important factor to improve the grinding effect, which directly affects the rate of grinding and removing the processed material, the surface roughness of the processed material and the overall yield of the grinding process. During the grinding and polishing process, the friction between the grinding wheel and the surface to be processed generates a lot of heat, and at the same time produces more debris. In order to remove the heat and grinding debris generated by friction in time, improve the use efficiency of the grinding pad and the overall grinding yield. , It is necessary to inject grinding fluid into the grinding wheel and the surface to be processed. The main properties of the grinding fluid are cooling, lubrication, cleaning and rust prevention. Due to its serious environmental pollution and difficulties in subsequent cleaning and treatment, oily abrasives are currently being phased out. In recent years, water-based grinding fluid has been widely used because of its remarkable advantages in cooling, cleaning, processing visibility and antibacterial properties. However, there are still some deficiencies in various water-based grinding fluids currently available on the market, such as corrosion problems when the aluminum alloy is placed after grinding and the overall low yield of the grinding process.

Contents of the invention

In view of the above, it is necessary to provide a water-based grinding fluid for grinding and polishing the surface of aluminum products with good rust resistance and high grinding yield.

A water-based grinding fluid, comprising a lubricant, an emulsifier, an antirust agent, a pH regulator and water, wherein the lubricant is selected from carboxylic acids, amides, fatty acid esters, alcohols, fatty acid salts and sulfur The emulsifier is selected from at least one of ethers, esters and carbonates, and the rust inhibitor is selected from barium salts, heterocyclic organic compounds and at least one of organic acids, the pH regulator is selected from at least one of inorganic bases and organic bases, the weight percentage of the lubricant is 6-12%, and the weight percentage of the emulsifier is 4-8 %, the weight percentage of the rust inhibitor is 1-5%, the weight percentage of the pH regulator is 4-18% and the weight percentage of water is 60-85%.

A preparation method of water-based grinding fluid, comprising the following steps:

Add water, emulsifier, and pH adjuster into the reaction kettle and stir well. The emulsifier is selected from at least one of ethers, esters, and carbonates. The pH adjuster is selected from inorganic bases, organic at least one of bases;

Add the lubricant into the reaction kettle to fully emulsify and stir evenly. The reaction temperature is 25-70°C. The lubricant is selected from carboxylic acids, fatty acid amides, fatty acid esters, alcohols, fatty acid salts, sulfur-based and chlorine-based electrodes at least one of pressure lubricants;

The antirust agent is added into the reactor and mixed evenly, and the pH of the water-based grinding fluid is controlled at 8-10. The antirust agent is selected from at least one of barium salt, heterocyclic organic matter and organic acid.

The present invention also provides a method for using a water-based grinding fluid for surface grinding and polishing of aluminum products, comprising the following steps:

After diluting the grinding fluid and water at a ratio of 1:1 to 10, it is used in conjunction with abrasive pads such as P400 to P2400 sandpaper and polishing wheels.

Compared with the prior art, the water-based grinding fluid used for the surface grinding and polishing of aluminum products of the present invention has the following advantages:

The composite formula system composed of lubricant, emulsifier and antirust agent in the present invention can effectively form an oil film on the surface of aluminum alloy, isolate the air from contacting with the aluminum surface to prevent the surface of aluminum alloy from being corroded, and has excellent anti-corrosion properties between processes. Rust.

In the present invention, a relatively mild pH regulator is selected, which can generate chemical action force (polishing force includes mechanical action force and chemical action force) during the grinding process, and at the same time, it will not corrode the aluminum alloy, and has good grinding and polishing process. high rate features.

Simultaneously, the preparation process of the present invention is simple, easy to operate, easy to clean in the subsequent cleaning process, and has no residue.

Detailed ways

The water-based grinding fluid of the present application will be described in detail below through specific examples. It should be noted that the examples are only used to illustrate the composition, content and preparation method of the water-based grinding fluid for surface grinding and polishing of aluminum products, and do not limit the protection scope of the present application in any way.

The water-based grinding fluid for surface grinding and polishing of aluminum products described in this application mainly contains a lubricant, an emulsifier, an antirust agent, a pH regulator and water. In the water-based grinding fluid, the weight percentage of the lubricant is 6-12%, the weight percentage of the emulsifier is 4-8%, the weight percentage of the rust inhibitor is 1-5%, and the pH adjuster The weight percentage of water is 4-18% and the weight percentage of water is 60-85%.

The water-based grinding fluid may also include biocides and defoamers. When the water-based grinding fluid includes a bactericide and a defoamer, the weight percentage of the lubricant in the water-based grinding fluid is 2-12%, the weight percentage of the emulsifier is 2-8%, and the anti-rust agent The weight percentage is 1-10%, the weight percentage of pH regulator is 0.5-20%, the weight percentage of fungicide is 0.05-0.5%, the weight percentage of defoamer is 0.1-0.5%, and the weight percentage of water is 50% ~80%. Preferably, the weight percentage of the lubricant is 6-12%, the weight percentage of the emulsifier is 4-8%, the weight percentage of the rust inhibitor is 1-5%, and the weight percentage of the pH regulator is 3- 18%, the weight percentage of the bactericide is 0.1-0.5%, the weight percentage of the defoamer is 0.1-0.5%, and the weight percentage of the water is 60-80%.

The lubricant is selected from at least one of carboxylic acid, amide, fatty acid ester, alcohols, fatty acid salt and sulfur-based and chlorine-based extreme pressure lubricants.

The carboxylic acid is at least one selected from stearic acid and palmitic acid. The amides are selected from fatty acid amides. The alcohols are selected from at least one of fatty alcohols and glycerol polyethylene glycol. The fatty acid salt is selected from fatty acid metal soaps. Preferably, the lubricant is selected from at least one of fatty acid amide, fatty alcohol, polyethylene glycol, and glycerin. The lubricant can take away the heat generated by friction and grinding debris in time to improve the cleaning ability.

The emulsifier is selected from at least one of ethers, esters and carbonates. The ethers are selected from at least one of alkylphenol polyoxyethylene ethers and polyoxyethylene alcohol ethers, the esters are selected from triethanolamine stearate, and the carbonates are selected from lauryl At least one of sodium benzenesulfonate, sodium laurylsulfonate, sodium petroleum sulfonate, sodium laurate monoglyceride sulfate, fatty alcohol polyoxyethylene ether phosphate, sodium polyacrylate, maleic acid and acrylic acid copolymer kind. Preferably, the emulsifier is selected from at least one of sodium dodecylbenzenesulfonate, sodium dodecylsulfonate, and a copolymer of maleic acid and acrylic acid.

The antirust agent is at least one selected from barium salts, heterocyclic organic compounds and organic acids. The barium salt is selected from at least one of barium petroleum sulfonate and barium nonylnaphthalene sulfonate, and the heterocyclic organic compound is selected from at least one of tolyl benzotriazole and mercaptobenzothiazole. The acid is selected from dodecenylsuccinic acid. Preferably, the antirust agent is selected from tolylbenzotriazole. The combination of the antirust agent and the emulsifier can prevent the corrosion phenomenon of the aluminum product itself, and has excellent antirust performance between processes.

The pH regulator is selected from at least one of inorganic bases and organic bases. The inorganic base is selected from at least one of sodium hydroxide and potassium hydroxide, and the organic base is selected from diethanolamine, triethanolamine, hexamethylenetetramine, isopropanolamine, triethylamine and polyethylene glycol at least one of the amines. Preferably, the pH regulator is at least one selected from triethanolamine and polyethyleneimine.

The bactericide is selected from at least one of salts, parabens and isothiazolinones. The salt is selected from at least one of dodecyl dimethyl benzyl ammonium chloride, sodium benzoate and potassium sorbitol. Preferably, the fungicide is selected from at least one of dodecyldimethylbenzyl ammonium chloride and sodium benzoate. The bactericide mainly plays the role of anti-mildew and anti-bacteria.

The defoamer is selected from at least one of silicone oil, polyether and higher alcohol. The silicone oil is at least one selected from dimethyl silicone oil and polyether modified silicone oil. Preferably, the defoamer is simethicone. The defoamer can eliminate foam in the reaction system and prevent a large number of bubbles from being dispersed in the air.

The water is preferably deionized water.

The surface grinding and polishing water-based grinding fluid of this application is composed of lubricants, emulsifiers and antirust agents. The compound formula system can effectively form an oil film on the surface of the aluminum alloy, and isolate the air from contacting the aluminum surface to prevent the surface of the aluminum alloy. Corroded, has excellent inter-process rust resistance. In addition, this application uses a relatively mild pH regulator, which can generate chemical force during the grinding process (polishing force includes mechanical force and chemical force), and at the same time will not corrode the aluminum alloy, and has a high yield rate in the grinding and polishing process. features.

The aluminum product surface grinding and polishing water-based grinding fluid described in the application can be made by the following methods:

Add water, emulsifier, and pH regulator into the reaction kettle and stir well;

Add the lubricant into the reaction kettle to fully emulsify and stir evenly, and the reaction temperature is 25-70°C;

Add the antirust agent into the reaction kettle and mix evenly, and control the pH of the water-based grinding fluid at 8-10.

In the preparation process of the water-based grinding fluid, a bactericide and a defoamer can also be added.

The composition of the water-based grinding fluid of the present application will be further described below in conjunction with Examples 1-3 (see Table 1). The preparation methods of the water-based grinding fluids in Examples 1-3 are the same as above. The examples 1-3 are intended to illustrate the composition and content of the water-based grinding fluid. The "balance" appearing in Table 1 refers to the remaining amount in which the total content of each component in the water-based grinding fluid is 100%.

The composition and content of the water-based grinding fluid of table 1 embodiment 1～3

performance testing

The aqueous grinding solution prepared in Examples 1-3 was diluted with water, and the machined aluminum alloy was ground on an automatic grinding robot arm with the diluted solution and sandpaper. The yield statistics of the 500 pieces of aluminum alloys ground in this process section are uniform, and the grinding yield is obtained (refer to Table 2). After grinding, put the aluminum alloy for 24 hours and then ultrasonically clean it with water to observe the surface brightness, corrosion and whether there is any grinding liquid residue on the aluminum alloy surface.

The grinding yield of the water-based grinding fluid of table 2 embodiment 1～3

As can be seen from Table 2, the water-based grinding fluids of Examples 1 to 3 of the present application have a high grinding yield of 500 pieces of aluminum alloys ground in this process, and when used for grinding and polishing the surface of aluminum products, after grinding After the aluminum alloy is placed for 24 hours, it is ultrasonically cleaned with water. The surface of the aluminum alloy is bright and corrosion-free, and there is no abrasive residue.

In summary, although the present invention has been described in detail through the specific embodiments of the present invention, those of ordinary skill in the art should understand that the above-mentioned embodiments are descriptions of the preferred embodiments of the application, rather than the protection scope of the application. Any changes that can be easily conceived by those skilled in the art within the technical scope disclosed in this application are within the scope of protection of this application.

Claims (11)

1. A water-based grinding fluid, characterized in that: said water-based grinding fluid contains lubricant, emulsifier, antirust agent, pH regulator and water, and said lubricant is selected from carboxylic acid, amide, At least one of fatty acid esters, alcohols, fatty acid salts and sulfur-based and chlorine-based extreme pressure lubricants, the emulsifier is selected from at least one of ethers, esters and carbonates, the The antirust agent is selected from at least one of barium salts, heterocyclic organic compounds and organic acids, the pH regulator is selected from at least one of inorganic bases and organic bases, and the weight percentage of the lubricant is 6 to 12 %, the weight percentage of the emulsifier is 4-8%, the weight percentage of the rust inhibitor is 1-5%, the weight percentage of the pH regulator is 4-18% and the weight percentage of water is 60-85%. 2. water-based grinding fluid as claimed in claim 1, is characterized in that: described water-based grinding fluid also comprises bactericide and antifoaming agent, and this bactericide is selected from salt, parabens, isophthalic acid At least one of thiazolinones, the defoaming agent is selected from at least one of silicone oil, polyether and higher alcohol. 3. The water-based grinding fluid according to claim 2, characterized in that: the weight percentage of the lubricant is 2 to 12%, the weight percentage of the emulsifier is 2 to 8%, and the weight percentage of the rust inhibitor is 1-10%, the weight percentage of pH regulator is 0.5-20%, the weight percentage of fungicide is 0.05-0.5%, the weight percentage of defoamer is 0.1-0.5%, and the weight percentage of water is 50-80% . 4. water base grinding fluid as claimed in claim 2, is characterized in that: this salt is selected from at least one in lauryl dimethyl benzyl ammonium chloride, sodium benzoate and potassium sorbate, The silicone oil is at least one selected from dimethyl silicone oil and polyether modified silicone oil. 5. The water-based grinding fluid according to claim 1, characterized in that: the carboxylic acid is selected from at least one of stearic acid and palmitic acid, the amides are selected from fatty acid amides, and the alcohols are selected from It is at least one of fatty alcohol and glycerol polyethylene glycol, and the fatty acid salt is selected from fatty acid metal soap. 6. The water-based grinding fluid according to claim 1, characterized in that: the ethers are selected from at least one of alkylphenol polyoxyethylene ethers and polyoxyethylene alcohol ethers, and the esters are selected from Triethanolamine stearate, the carbonate is selected from sodium dodecylbenzenesulfonate, sodium dodecylsulfonate, sodium petroleum sulfonate, sodium laurate monoglyceride sulfate, fatty alcohol polyoxyethylene At least one of ether phosphate, sodium polyacrylate, maleic acid and acrylic acid copolymer. 7. The water-based grinding fluid as claimed in claim 1, characterized in that: the barium salt is selected from at least one of barium petroleum sulfonate and barium nonylnaphthalene sulfonate, and the heterocyclic organic matter is selected from At least one of tolylbenzotriazole and mercaptobenzothiazole, the organic acid can be dodecenylsuccinic acid, and the inorganic base is at least one of sodium hydroxide and potassium hydroxide, The organic base is at least one selected from diethanolamine, triethanolamine, hexamethylenetetramine, isopropanolamine, triethylamine and polyethyleneimine, and the water is deionized water. 8. A preparation method for water-based grinding fluid, comprising the following steps: Add water, emulsifier and pH adjuster into the reaction kettle and stir well, the water is deionized water, the emulsifier is at least one selected from ethers, esters and carbonates, the pH adjuster At least one selected from inorganic bases and organic bases; Add the lubricant into the reaction kettle to fully emulsify and stir evenly. The reaction temperature is 25-70°C. The lubricant is selected from carboxylic acids, amides, fatty acid esters, alcohols, fatty acid salts, sulfur-based and chlorine-based extreme pressure at least one of lubricants; The antirust agent is added into the reactor and mixed evenly, and the pH of the water-based grinding fluid is controlled at 8-10. The antirust agent is selected from at least one of barium salt, heterocyclic organic matter and organic acid. 9. the preparation method of water-based grinding fluid as claimed in claim 8 is characterized in that: also add bactericide and defoamer in the preparation process of described water-based grinding fluid, and this bactericide is selected from salt At least one of class, parabens, isothiazolinone, the defoamer is selected from at least one of silicone oil, polyether and higher alcohol, the salt is selected from dodecyl dimethyl At least one of benzyl ammonium chloride, sodium benzoate and potassium sorbitol, the silicone oil is selected from at least one of dimethyl silicone oil and polyether modified silicone oil, and the water is deionized water. 10. The preparation method of water-based grinding fluid as claimed in claim 8, is characterized in that: the ethers are selected from at least one of alkylphenol polyoxyethylene ethers and polyoxyethylene alcohol ethers, and the ester The class is selected from triethanolamine stearate, the carbonate is selected from sodium dodecylbenzenesulfonate, sodium dodecylsulfonate, sodium petroleum sulfonate, sodium laurate monoglyceride sulfate, fatty alcohol At least one of polyoxyethylene ether phosphate, sodium polyacrylate, maleic acid and acrylic acid copolymer. 11. the preparation method of water-based grinding fluid as claimed in claim 8 is characterized in that: this inorganic base is selected from at least one in sodium hydroxide, potassium hydroxide, and this organic base is selected from diethanolamine, At least one of triethanolamine, hexamethylenetetramine, isopropanolamine, triethylamine and polyethyleneimine, the carboxylic acid is selected from at least one of stearic acid and palmitic acid, the amide selected from fatty acid amides, the alcohols selected from at least one of fatty alcohol, glycerol polyethylene glycol, the fatty acid salt selected from fatty acid metal soap, the barium salt selected from barium petroleum sulfonate , at least one of barium nonylnaphthalene sulfonate, the heterocyclic organic compound is selected from at least one of tolyl benzotriazole and mercaptobenzothiazole, and the organic acid is selected from dodecenyl butyl Diacid.