Ethylene glycol-Water type, because ethylene glycol has a high boiling point, it is not suitable for evaporation loss during use, and the freezing point is low, reaching -50°C when the water content is 95%. It has a high flash point, is not easy to catch fire, and has good safety. It is suitable for both severe cold areas and the high-temperature operation requirements of high-load engines. The raw materials are easy to obtain. It is currently the antifreeze used by Guangfa.
Ethylene glycol type; the concentration ratio is:55%–liquid 45%–water, boiling point: 107℃; freezing point: -40℃.
According to the temperature required to be prevented, 1 to 3 times the amount of water can be added. Usually, when water is mixed at a ratio of 1:1, the freezing point of the coolant will be reduced to -36.7°C. The maximum concentration of ethylene glycol-water-based antifreeze is 75%. Remember not to exceed this concentration.
Water molecules pass through each other Molecular clusters formed by the association of hydrogen bonds have a high freezing point. In winter, if water is used as the cooling liquid alone, it will freeze below 0℃ and cannot flow. Not only will it not be able to circulate when it is started, The effect of cooling, and since the transformation of water into ice crystals is a process of volume increase, usually the same mass of water will increase by 9% to 10% when it turns into ice. The resulting expansion force will crack radiators, pipes and other components. In antifreeze containing ethylene glycol, due to the presence of ethylene glycol, the initial freezing point is much lower than that of water. When the freezing point is reached, the ice crystals precipitate into a slurry. shape, and the content of ethylene glycol in these ice crystals is low. Obviously, most of the ethylene glycol still remains in the unsolidified liquid phase. As a result, the freezing point of the uncrystallized solution is lower, which is exactly Due to this characteristic of ethylene glycol, the actual temperature used for antifreeze containing ethylene glycol can be lower than the measured freezing point. Of course, the freezing point will rise after it exceeds the lowest point (-69°C, the concentration of ethylene glycol is 68%). Therefore, it is thought that increasing the concentration of ethylene glycol can achieve a lower freezing point. In the end, it is all in vain
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