Automobile antifreeze

Abstract

The invention relates to an automobile antifreeze which comprises the following components by weight percent: 90-96% of alcohols, 1%-5% of water, 0%-0.5% of pigments and 3%-7% of additives. Compared with the prior art, the automobile antifreeze has strong corrosion resistance and can effectively prevent the scale formation, and the automobile antifreeze further has excellent protection performance for any material of a cooling part of an engine and excellent performances of anti-freezing in winter, anti-boiling in summer, anti-scale and anti-corrosion all over the year and the like and can effectively protect a water cooling system of an automobile, prolong the service life of the water cooling system of the automobile, reduce the cost, simultaneously have the environmental protection advantage and achieve the requirements of British standard BS6580:1992.

Description

technical field [0001] The invention relates to antifreeze supplies, in particular to an antifreeze fluid for automobiles. Background technique [0002] The earliest automobile engines were of two types, water-cooled and air-cooled. Water-cooled engines had a better cooling effect due to heat dissipation through radiators, so they were more and more widely used in high-power automobile engines. Water is a good heat transfer medium, but it does not have antifreeze effect in low temperature weather, so it is necessary to add a substance that can lower the freezing point of water in water, so that the coolant has antifreeze effect and can be used in vehicles or engines all year round . Inorganic salts were originally used in cooling liquids to lower the freezing point, but due to severe corrosion, the cooling system materials used in the early days were not widely used. Another class of substances that can lower the freezing point are polysaccharides, but they have not been w...

AI Technical Summary

Problems solved by technology

Another class of substances that can lower the freezing point are polysaccharides, but they have not been widely used due to their ineffective effect on lowering the freezing point and poor thermal stability.

Another type of substance is alcohols, including methanol, ethanol, ethylene glycol, glycerol, etc. In the early days of the development of coolants, methanol and ethanol were once widely used as antifreezes, but with the continuous development of the petrochemical industry Progress, the industrialization of the ethylene glycol synthesis process is becoming more and more mature, and the industrial application has been continuously promoted. The advantages of ethylene glycol as a coolant antifreeze are gradually reflected, and it has become the main coolant used in the market. The boiling point of methanol and ethanol is low. It is easy to volatilize during use, and at the same time, it has a low flash point and is easy to catch fire, which brings many unsafe factors. Therefore, methanol and ethanol coolants are gradually disappearing.

[0003] At present, automobile antifreeze is easy to corrode metal parts during use. Metal parts that have been corroded for a long time will generate a large amount of rust, which will gradually corrode the metal plate and cause leakage, which is directly related to the service life of the automobile cooling system; at the same time , the existing automobile antifreeze is also easy to form scale, usually everyone ignores the harm of scale, in fact, scale is quite harmful to the car, the thermal conductivity of scale is very small (1 / 25 of cast iron, 1 / 50 of brass), With scale, the thermal conductivity of the coolant is greatly reduced, the temperature of the engine rises, and the corrosion is aggravated, which in turn promotes the increase of scale, forming a vicious circle. The scale may also block the pipeline of the cooling system and cause even greater accidents. According to relevant domestic data It is reported that 6% of the maintenance work of automobile engines in normal use is due to the failure of the engine cooling system, and the main cause of the failure is the corrosion of scale and metal parts. It can be seen that the corrosion of scale and metal parts has a great impact on the engine water cooling system. how harmful is it

In addition, the nitrite, amine salt, phosphate, chromate and other components in the existing automobile antifreeze are harmful to the human body and the environment, and do not meet environmental protection requirements