Automobile anti-freezing cooling liquid and preparation method thereof

Abstract

The invention discloses an automobile anti-freezing cooling liquid and a preparation method thereof, and relates to the technical field of refrigerating fluids. The invention discloses an anti-freezing cooling liquid for an automobile. The anti-freezing cooling liquid is prepared from the following raw materials in percentage by weight: 70-80% of propylene glycol, 10-15% of PEG-200, 3.5-4.3% of a compound corrosion inhibitor, 0.5-0.8% of sodium polyaspartate, 0-0.05% of a coloring agent, 0.1-0.2% of a polyether defoaming agent and the balance of deionized water, the composite corrosion inhibitor is composed of water-soluble polyaniline, a triazole silane compound, decanoic acid, suberic acid and alkyl glycoside. The invention also provides a preparation method of the automobile anti-freezing cooling liquid. The automobile anti-freezing cooling liquid provided by the invention is environment-friendly, the preparation method is simple, and the automobile anti-freezing cooling liquid has excellent corrosion resistance to materials such as carbon steel, aluminum alloy, magnesium alloy, copper alloy, rubber or plastic sealing materials, also has excellent anti-boiling, anti-freezing and anti-scaling performance, can be stably stored for a long time, and is long in service life.

Description

technical field [0001] The invention belongs to the technical field of cooling liquids, and in particular relates to an automobile antifreeze cooling liquid and a preparation method thereof. Background technique [0002] The car engine is the core part of the car's power. Since a lot of heat is generated during the energy conversion process, the circulation of the cooling system is required to achieve the purpose of cooling, and the coolant is used to assist the heat dissipation of the engine. However, in the low temperature environment in winter Under these conditions, the coolant is easy to solidify at a low temperature, causing the cooling system of the automobile to freeze and crack, thus requiring the existing coolant to have a lower freezing point. Therefore, the antifreeze coolant has become a conventional indicator of the cooling system of the automobile engine. [0003] The traditional antifreeze coolant is composed of ethylene glycol and water mixed in a certain pr...

AI Technical Summary

Problems solved by technology

Among them, inorganic corrosion inhibitors mainly include: phosphates, chromates, molybdates, borates, nitrites and silicates, phosphates, borates, nitrites Molybdates and chromates have a good corrosion inhibition effect on carbon steel, aluminum, copper or zinc and other metals or alloys, but they are toxic to a certain extent and pollute water bodies, so their use has been restricted; Or alloys have good anti-corrosion effects, but they are expensive and costly; silicate compounds have good corrosion inhibition effects on almost every metal and alloy, but their stability changes after a certain period of storage and use. Poor, it is easy to form a gel-like substance to precipitate, which reduces the anti-corrosion performance, and the resulting gel is easy to block the pipeline

Organic corrosion inhibitors mainly include: amines, organic acids, and azole compounds. However, the existing organic corrosion inhibitors have unsatisfactory anticorrosion effects on aluminum or its alloys. These organic substances are in contact with aluminum metal. Discoloration and blackening of aluminum will affect the cooling and anti-corrosion effect of the coolant, thereby affecting the service life of the cooling system

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