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CN-119529782-B - Cooling medium and preparation method and application thereof

CN119529782BCN 119529782 BCN119529782 BCN 119529782BCN-119529782-B

Abstract

The invention relates to the technical field of cooling media, in particular to a cooling medium and a preparation method and application thereof. The cooling medium comprises, by weight, 1-3 parts of a metal corrosion inhibitor and 0.5-2 parts of an organic corrosion inhibitor, wherein the metal corrosion inhibitor is 2, 6-dimethylquinoline and/or 3, 8-dimethylquinoline, and the organic corrosion inhibitor is glycine Schiff base and/or tyrosine Schiff base. The cooling medium has excellent corrosion resistance of magnesium alloy materials, also has excellent corrosion inhibition performance on cast aluminum, steel, red copper, brass and various aluminum metals of other metal materials, also has good sediment dispersion performance and hard water resistance, and has good compatibility with various nonmetallic materials.

Inventors

  • FAN XIUJU
  • LEI LING
  • ZHAO LEI
  • YANG BING
  • YANG HUIJIE

Assignees

  • 中国石油化工股份有限公司
  • 中国石化润滑油有限公司

Dates

Publication Date
20260512
Application Date
20230831

Claims (10)

  1. 1. The cooling medium is characterized by comprising, by weight, 1-3 parts of a metal corrosion inhibitor, 0.5-2 parts of an organic corrosion inhibitor, 0.5-1.5 parts of a scale inhibition dispersing agent, 0.001-0.01 part of an anti-foaming agent and 0.5-2 parts of a pH value regulator; The scale inhibition dispersing agent is hydrolyzed polymaleic anhydride, the molecular weight of the hydrolyzed polymaleic anhydride is 500-600, and the pH value regulator is sodium hydroxide; The metal corrosion inhibitor is 2, 6-dimethylquinoline and/or 3, 8-dimethylquinoline; the organic corrosion inhibitor is glycine Schiff base and/or tyrosine Schiff base.
  2. 2. The cooling medium according to claim 1, further comprising 0.1 to 0.5 parts by weight of a nonmetallic material protective agent.
  3. 3. The cooling medium of claim 2, wherein the nonmetallic material protective agent is mercaptopropyl trimethoxysilane.
  4. 4. The cooling medium of claim 1, wherein the anti-foaming agent is L61.
  5. 5. The cooling medium of claim 1, further comprising a freezing point depressant and deionized water.
  6. 6. The cooling medium of claim 5, wherein the freezing point depressant is ethylene glycol.
  7. 7. The cooling medium according to claim 1, comprising the following components in parts by weight: 1-3 parts of a metal corrosion inhibitor; 0.5-2 parts of organic corrosion inhibitor; 0.5-1.5 parts of scale inhibition dispersing agent; 0.1-0.5 part of nonmetallic material protective agent; 0.001-0.01 part of an antifoaming agent; 0.5-2 parts of pH value regulator; 40-60 parts of a freezing point depressant; 50-60 parts of water.
  8. 8. A method for producing a cooling medium according to any one of claims 1 to 7, comprising the steps of: Dissolving a metal corrosion inhibitor, an organic corrosion inhibitor, a scale inhibition dispersing agent, a nonmetallic material protective agent, a pH value regulator and a freezing point depressant in water, stirring at normal temperature, adding an anti-foaming agent, and continuing stirring.
  9. 9. The method according to claim 8, wherein the stirring time at normal temperature is 30 to 60 minutes and the stirring time is 15 to 20 minutes.
  10. 10. Use of the cooling medium according to any one of claims 1-7 in a magnesium alloy three-electric system.

Description

Cooling medium and preparation method and application thereof Technical Field The invention relates to the technical field of cooling media, in particular to a cooling medium and a preparation method and application thereof. Background With the rapid development of new energy industry, under the stimulation of energy safety strategy and energy conservation and emission reduction benefits, a plurality of countries in the world are currently in the preparation of specific policies, so as to encourage and promote the development of new energy automobiles by various large automobile companies in the world, strive to reduce the energy consumption and emission of the automobiles to the minimum, and smoothly transition to the rear automobile age taking new energy as power. The automobile industry is driven by a plurality of policies and benefits to develop and innovate the whole industry chain, the development is concentrated on the aspects of light weight, integration, energy conservation, emission reduction and the like of the automobile, and according to the literature, the automobile quality is reduced by 5 percent, particularly, the automobile material is increasingly applied to the automobile industry, for example, more and more automobile OEMs adopt magnesium alloy, magnesium aluminum alloy and high polymer materials to replace traditional materials to reduce the weight of the automobile, wherein the magnesium alloy is a high-performance light-weight structural material taking magnesium as a raw material, has the advantages of small specific gravity, rigidity and strength similar to those of the traditional aluminum metal, and meanwhile, the magnesium alloy has the advantages of strong anti-vibration, electromagnetic resistance, heat conduction, electric conduction and the like, can be fully recovered without pollution, has good castability and dimensional stability, is easy to process, has low rejection rate, has good damping coefficient, and vibration reduction amount greater than that of aluminum alloy and cast iron, is very suitable for producing automobile parts, and more automobile enterprises and the magnesium alloy is used in the manufacture of automobile parts at home and abroad. The magnesium alloy has the defects of easy combustion, low strength and easy corrosion, and severely restricts the development of magnesium alloy technology and products in China. At present, although more and more enterprises use magnesium alloy materials in three-electric systems of new energy automobiles, the materials can be in direct contact with a cooling medium, so that corrosion resistance of magnesium alloy is always a great difficulty, and development and application of the materials in the industry are restricted. Disclosure of Invention In order to solve the technical problems, the invention provides a cooling medium, and a preparation method and application thereof. The cooling medium is used in a cooling system of a magnesium alloy material, can timely take away heat of equipment to ensure normal operation of the equipment, has excellent corrosion resistance of the magnesium alloy material, has excellent corrosion inhibition performance on cast aluminum, steel, red copper, brass and various aluminum metals of other metal materials, has good sediment dispersion performance and hard water resistance, and has good compatibility with various nonmetallic materials. According to a first aspect of the invention, the cooling medium comprises 1-3 parts by weight of metal corrosion inhibitor and 0.5-2 parts by weight of organic corrosion inhibitor, wherein the parts by weight can be mg, g, kg and other weight units known in the art, or can be multiples thereof, such as 1/10, 1/100, 10 times, 100 times and the like. The metal corrosion inhibitor is 2, 6-dimethylquinoline and/or 3, 8-dimethylquinoline; the organic corrosion inhibitor is glycine Schiff base and/or tyrosine Schiff base. In the scheme, the cooling medium comprises the metal corrosion inhibitor and the organic corrosion inhibitor, wherein 2, 6-dimethylquinoline and/or 3, 8-dimethylquinoline are selected as the metal corrosion inhibitor, and the cooling medium has better corrosion inhibition performance on various metals, and particularly after being compounded with the organic corrosion inhibitor, the cooling medium can promote corrosion resistance on light-weight materials such as magnesium alloy AZ91D and magnesium AM50 commonly used in the three-electric system in the new energy industry. The organic corrosion inhibitor adopts glycine Schiff base and/or tyrosine Schiff base, and can inhibit metal corrosion on various metals such as copper, aluminum 3003, 4043, 6063 and the like under alkaline conditions. Further, the scale inhibition and dispersion agent comprises the following components in parts by weight of 0.5-1.5 parts of scale inhibition and dispersion agent; preferably, the scale inhibiting dispersant is hydrolyzed polymaleic anhydride, more prefe