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CN-121991752-A - Environment-friendly magnesium alloy processing liquid and preparation method thereof

CN121991752ACN 121991752 ACN121991752 ACN 121991752ACN-121991752-A

Abstract

The invention provides an environment-friendly magnesium alloy processing liquid and a preparation method thereof, and relates to the technical field of metal processing liquids. The magnesium alloy processing liquid comprises naphthenic mineral oil, an antirust agent, graphene oxide modified fatty acid amide, a glucose type gemini surfactant, an emulsifier, an organic corrosion inhibitor, a phosphate corrosion inhibitor, an extreme pressure antiwear agent, a pH stabilizer, a defoaming agent, a bactericide, a lubricant and water. The preparation method comprises the steps of heating water, sequentially adding an antirust agent, an organic corrosion inhibitor and a pH stabilizer, adding naphthenic mineral oil, graphene oxide modified fatty acid amide, a glucose-type bi-molecular surfactant and an emulsifying agent, continuously stirring, sequentially adding other components except the defoaming agent, slowly adding the defoaming agent, stirring at a low speed, stopping heating, stirring and cooling. The invention builds a microemulsion system based on naphthenic mineral oil and water, and eliminates the high-temperature environment required by magnesium chip combustion from the root, thereby greatly improving the safety of the processing process.

Inventors

  • DING YIBO
  • WU YATING

Assignees

  • 南京尚勤新材料科技有限公司

Dates

Publication Date
20260508
Application Date
20260123

Claims (9)

  1. 1. The environment-friendly magnesium alloy processing liquid is characterized by comprising, by mass, 15% -25% of cycloalkyl mineral oil, 3% -8% of an antirust agent, 8% -15% of graphene oxide modified fatty acid amide, 1% -2% of a glucose type gemini surfactant, 5% -10% of an emulsifying agent, 1% -3% of an organic corrosion inhibitor, 1% -2% of a phosphate corrosion inhibitor, 1% -3% of an extreme pressure antiwear agent, 5% -15% of a pH stabilizer, 0.1% -0.5% of a defoaming agent, 1% -3% of a bactericide, 3% -5% of a lubricant and the balance of water.
  2. 2. The environment-friendly magnesium alloy processing liquid according to claim 1, wherein the organic corrosion inhibitor is any one of benzotriazole, methylbenzotriazole and thiadiazole derivatives.
  3. 3. The environment-friendly magnesium alloy processing liquid according to claim 1, wherein the emulsifier is a nonionic alkoxy alcohol ether type emulsifier.
  4. 4. The environment-friendly magnesium alloy machining liquid according to claim 1, wherein the extreme pressure antiwear agent is ashless phosphate or phosphorothioate.
  5. 5. The environment-friendly magnesium alloy processing liquid according to claim 1, wherein the pH stabilizer is a mixture formed by compounding ethanolamine and special amine.
  6. 6. The environment-friendly magnesium alloy processing liquid according to claim 5, wherein the ethanolamine is triethanolamine and/or diethanolamine, and the special amine is cyclohexylamine ethoxylate and/or 2-amino-2-methyl-1-propanol.
  7. 7. The environment-friendly magnesium alloy processing liquid according to claim 1, wherein the rust inhibitor is a mixture of two or more of tricarboxylic acid, sebacic acid and dodecanedioic acid.
  8. 8. The environmentally friendly magnesium alloy processing fluid of claim 1, wherein the cycloalkyl mineral oil has a kinematic viscosity at 40 ℃ of 20-24mm 2 /s.
  9. 9. The method for preparing an environment-friendly magnesium alloy processing liquid according to any one of claims 1 to 8, comprising the steps of: s1, adding metered water into a reaction kettle, starting stirring and heating to 50-60 ℃; Step S2, sequentially adding the antirust agent, the organic corrosion inhibitor and the pH stabilizer, and stirring until the antirust agent, the organic corrosion inhibitor and the pH stabilizer are completely dissolved; step S3, sequentially adding naphthenic mineral oil, graphene oxide modified fatty acid amide, glucose type bimolecular surfactant and emulsifier under uniform stirring, and continuously stirring for 30-40 minutes until the system is in a uniform transparent state; step S4, sequentially adding other components except the defoamer, and stirring for 10-15 minutes after each component is added to ensure full dispersion and dissolution; Step S5, slowly adding an antifoaming agent and stirring at a low speed; And S6, stopping heating, continuously stirring and cooling to room temperature, and discharging to obtain the product.

Description

Environment-friendly magnesium alloy processing liquid and preparation method thereof Technical Field The invention relates to the technical field of metal working fluids, in particular to an environment-friendly magnesium alloy working fluid and a preparation method thereof. Background The magnesium alloy has the advantages of small density, high specific strength, good damping property, good cutting performance and the like, and is widely applied to the fields of aerospace, automobiles, 3C electronics and the like. However, magnesium alloys are very active in chemical nature and present three technical challenges in machining processes, including in particular, the fact that magnesium chips and powders are very flammable at high temperatures, with serious fire safety hazards. The main stream of pure oily magnesium alloy processing liquid in the current market is flammable, so that the fire risk is aggravated. Secondly, the magnesium alloy is extremely easy to generate electrochemical corrosion in a water system environment, so that spots and darkness are generated on the surface of a workpiece, and the appearance and performance of a product are affected. Thirdly, magnesium ions are released by the reaction of the magnesium alloy with water in the processing process, and the magnesium ions react with anionic additives in the water to generate insoluble metal soaps, so that the problems of oil precipitation, soap separation, layering, deterioration and the like of the processing liquid are caused, and the lubricating, cooling and rust-preventing performances of the processing liquid are rapidly failed. This not only seriously affects the processing quality, but also forces enterprises to frequently replace processing liquid, increasing the production cost and the burden of waste liquid treatment. Therefore, developing a processing liquid which can ensure the processing safety, effectively prevent the magnesium alloy from being corroded, can resist high-concentration magnesium ions and keep a system stable for a long time becomes a technical problem to be solved in the field. Disclosure of Invention In order to solve the problems of inflammability of magnesium scraps, high corrosion of workpieces and low processing stability in the existing magnesium alloy processing process, the invention provides an environment-friendly magnesium alloy processing liquid and a preparation method thereof. In a first aspect, the invention provides an environment-friendly magnesium alloy processing liquid, which adopts the following technical scheme: The environment-friendly magnesium alloy processing liquid comprises, by mass, 15% -25% of cycloalkyl mineral oil, 3% -8% of an antirust agent, 8% -15% of graphene oxide modified fatty acid amide, 1% -2% of a glucose type gemini surfactant, 5% -10% of an emulsifying agent, 1% -3% of an organic corrosion inhibitor, 1% -2% of a phosphate corrosion inhibitor, 1% -3% of an extreme pressure antiwear agent, 5% -15% of a pH stabilizer, 0.1% -0.5% of a defoaming agent, 1% -3% of a bactericide, 3% -5% of a lubricant and the balance of water. The invention builds a micro emulsion system based on naphthenic mineral oil and water, and compared with the prior art, the dosage of the naphthenic mineral oil is greatly reduced, the high specific heat capacity and the vaporization latent heat of the water can rapidly reduce the temperature of a processing area, and the high-temperature environment required by the combustion of magnesium scraps is radically eliminated, thereby greatly improving the safety of the processing process and fundamentally solving the fire hazard in the processing of magnesium alloy. The graphene oxide modified fatty acid amide is used as a core component, the fatty acid amide structure in the molecule of the graphene oxide modified fatty acid amide provides excellent lubricity, so that the graphene oxide modified fatty acid amide has a lubricating function, cutting force and friction heat required by processing are reduced, a physical barrier film can be formed on the surface of a magnesium alloy by the graphene oxide sheet in the graphene oxide modified fatty acid amide molecule, water and oxygen are effectively prevented from contacting with a magnesium matrix, corrosion is inhibited, meanwhile, the special molecular structure of the graphene oxide modified fatty acid amide is not easy to combine with magnesium ions to form a precipitate, the problem of system instability caused by the generation of metal soap is solved from the root, and more importantly, the graphene oxide modified fatty acid amide can be synergistic with an emulsifier to form extremely fine and stable emulsion particles, and the dispersion stability can be kept even under a high magnesium ion concentration environment. The glucose gemini surfactant not only provides necessary emulsification function, but also endows the working solution with excellent cleaning capability due to the unique molecular s