Antifreeze Antifreeze is called antifreeze coolant. Antifreeze can prevent the vehicle from freezing when it stops in cold winter and it will burst the cooling system of the vehicle. In summer, it can prevent “opening”. Effectively protect the water tank, universal for all seasons. When using antifreeze, we will find that the color of antifreeze is blue, yellow, green and so on. There are often car owners asking small servants, what is the difference between different colors of antifreeze, can you mix and use? The color of the antifreeze does not have any special function. In fact, the color is caused by adding a dye to the liquid, just to distinguish it from other liquids. It can also help the owner to distinguish between antifreeze selection and prevent the mixing of different antifreezes and damage the engine. Different coolants can’t be mixed because different types of preservatives, rust inhibitors, defoamers and pigments are added in different grades of coolant. The chemical composition is easy to react with each other, causing precipitation, scaling and corrosion. The hazard affects the life of the engine. At present, there are many anti-freezing liquids on the market, and some are phosphate. If these two antifreezes are mixed, they will produce highly corrosive substances, which will cause great damage to the engine. Even if the main components are the same, and the minor components are different, they cannot be mixed. Ethylene glycol and propylene glycol react at high temperature and high pressure to form a gum base. Antifreeze is generally divided into three types: ethanol-water type, glycerin-water type and ethylene glycol-water type. Ethanol has a freezing point of -114 ° C and a boiling point of 78.3 ° C. Ethanol is easily ignited and easily evaporated. The content of the ethanol is generally not more than 40%, and it is not suitable for use in a diesel engine cooling system with a high working temperature. Glycerin (glycerol) has a freezing point of -17 ° C, a boiling point of 290 ° C, and a freezing point of -46.5 ° C after mixing with water. When the content of glycerin in water is relatively large, low freezing point antifreeze can be obtained, which is uneconomical to use. . The freezing point of ethylene glycol is -11.5 ° C, the boiling point is 197.4 ° C, and the freezing point after mixing with water is as low as -68 ° C; ethylene glycol is not volatile, and the dosage is small when used, so it is widely used; ethylene glycol is generally green. , propylene glycol is red with a bit of orange, glycerol is blue. Note: In summer use, the antifreeze should not be replaced with other liquids such as tap water. The effect on the engine is very bad. The color of the antifreeze is artificially added. It cannot be used as a standard to evaluate its merits and demerits. The liquid should be selected according to the temperature of the area, generally lower than the lowest temperature of the region of 10 degrees Celsius.
July 26, 2019 0 Comments
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