Organic corrosion-inhibiting cooling liquid and preparation method thereof

A technology for coolant and corrosion inhibition, applied in the field of organic type corrosion inhibitor coolant and its preparation, can solve the problems of easy blockage of engine pipelines, engine overheating failure, corrosion inhibition performance decline, etc., so as to achieve less environmental pollution and increase service life , Enhance the effect of corrosion inhibition rate

Active Publication Date: 2020-11-24
纯牌科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional antifreeze is mostly based on silicate formula, but the stability of silicate becomes poor after a period of storage and use, and it is easy to form gel precipitation, which not only reduces the corrosion inhibition performance, but also reduces the corrosion resistance of the gel during use. It is easy to block the engine pipes, adhere to the inner surface of the radiator, reduce the heat transfer efficiency and cause engine overheating failure

Method used

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  • Organic corrosion-inhibiting cooling liquid and preparation method thereof
  • Organic corrosion-inhibiting cooling liquid and preparation method thereof
  • Organic corrosion-inhibiting cooling liquid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 provides an organic type corrosion-inhibiting cooling liquid, including the following components in weight percentage: 0.15% of tolyl benzotriazole or benzotriazole; compound component A: 0.8% of octanoic acid, 2-Ethylhexanoic acid 2.45%; compound component B: azelaic acid 1.35%, terephthalic acid 1.8%, neodecanoic acid 2.5%, sebacic acid 0.8%; sodium benzoate 1.2%; polyhexamethylene Base guanidine 0.7%; Fluorescein sodium 5ppm; Silicone defoamer 25ppm; The balance is water and ethylene glycol. The technical index of the organic type corrosion-inhibiting cooling liquid that embodiment 1 makes sees the following table 1:

[0025] The control experiment provides a kind of inorganic cooling liquid, including the following components in mass percentage: 0.15% benzotriazole, 0.35% triethanolamine, 0.21% sebacic acid, 0.15% sodium hydroxide, 0.14% sodium nitrate, Sodium nitrite 0.3%, sodium silicate 1.0%, water and ethylene glycol are added according to the freezin...

Embodiment 8

[0048] The difference between Example 8 and Example 1 is that the neodecanoic acid in the compound component B is replaced by 1,2,3-3 methylpentanoic acid; the difference between Example 9 and Example 1 is that the compound The amount of neodecanoic acid in component B is reduced, and another 1,2,3-3 methylpentanoic acid is added; the difference between Example 10 and Example 1 is that the compound component B lacks neodecanoic acid The difference between Example 11 and Example 1 is that azelaic acid will be lacking in the compounding component B; the mass percentage of the compounding component B in the total amount remains unchanged. From the experimental results of Examples 8-11 in Table 5, it can be known that some of the tested data of the cooling liquids in Examples 8-11 seriously exceed the requirements of the national standard. The anti-corrosion performance decreased significantly. This is because the combination of azelaic acid, terephthalic acid, neodecanoic acid an...

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Abstract

The invention relates to an organic corrosion-inhibiting cooling liquid and a preparation method thereof. The organic corrosion-inhibiting cooling liquid comprises the following components by mass: 0.05%-0.2% of methylbenzotriazole or benzotriazole; a component A, which is composed of 0.5%-2% of caprylic acid and 0.50%-3.0% of 2-ethylhexanoic acid; a compound component B, which is composed of 1.0%-2.0% of azelaic acid, 1.5%-2.5% of terephthalic acid, 2.0%-3.0% of neodecanoic acid and 0.5%-2.0% of sebacic acid; 0.1%-2.0% of sodium benzoate; 0.2%-0.7% of polyhexamethylene guanidine; 1-10 ppm ofsodium fluorescein; and 20-40 ppm of an organic silicon defoaming agent, with the balance being water and ethylene glycol, wherein the water and the ethylene glycol are added according to a freezing point ratio. According to the organic corrosion-inhibiting cooling liquid, organic acid and other organic corrosion inhibitors are compounded in proportion, and the principles of the synergistic effectbetween monobasic acid and dibasic acid and the like are adopted, so the organic corrosion-inhibiting cooling liquid has the advantages of high stability, higher corrosion resistance, low environmental pollution, long service life, better friendliness to environment and health and the like.

Description

technical field [0001] The invention relates to the field of engine cooling, in particular to an organic corrosion-inhibiting coolant and a preparation method thereof. Background technique [0002] The total market demand for vehicle coolant will increase with the increase of vehicle ownership, and engine coolant is the heat transfer medium in the cooling system, which has the functions of cooling, anti-corrosion, anti-scaling and anti-freezing, and is indispensable for the normal operation of the engine. In recent years, with the rapid development of domestic and foreign automobile industries, the quality requirements for automobile engine coolant are getting higher and higher. Most of the commonly used engine coolants are aqueous solutions of ethylene glycol, water is the main cooling medium, and ethylene glycol is used to lower the freezing point of the coolant; at the same time, in order to ensure that the metal parts of the engine cooling system are not corroded by the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/20
CPCC09K5/20
Inventor 刘雨修陈宏春王丽丽
Owner 纯牌科技股份有限公司
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