Antifreeze precautions

How to distinguish between real and fake products
So how to distinguish between them? Mainly from the following aspects: First, price: In terms of price, if the reference freezing point is -25℃, the price is below 5 yuan/kg, it is basically not the real thing; Second, smell, if there are all kinds of pungent and unpleasant smells, it must be fake, and the real thing does not have much smell; Third, feel: if it is not lubricated and volatile (note: it is strictly forbidden to taste it with your mouth! The additives of antifreeze contain carcinogens) it is a fake antifreeze that is easy to boil with low boiling point alcohols; if there is white solid at the mouth of the packaging barrel, it is heavy to lift by hand, feels very astringent, and has no special smell, it is a fake antifreeze processed with industrial salt or brine; Fourth, turbidity: no matter what color the product is, it must maintain a certain degree of transparency. Turbid products are not good products. Fifth, look at the fluidity. Compared with pure water, the viscosity of good antifreeze is slightly higher.
Purchase principles
(1) Select the freezing point of the antifreeze according to the ambient temperature conditions. The freezing point of the antifreeze is one of the most important indicators of the antifreeze and an important condition for whether the antifreeze can prevent freezing. In general, the freezing point of the antifreeze should be selected at the lowest winter temperature of the local environment, around -10℃～15℃. If the local lowest temperature is -30℃, the freezing point of the antifreeze should be selected below -45℃. If you want to choose ethylene glycol mother liquor for preparation, you can prepare an antifreeze with an ethylene glycol concentration of 59%, a freezing point of -50℃, and a density of 1.0786mg/cm3.
(2) Select antifreeze according to different vehicle requirements. In general, imported vehicles, domestically imported production vehicles, and high-end and medium-end vehicles should use permanent antifreeze (2-3 years), while ordinary vehicles can use direct-use antifreeze, and softened water can be used in summer.
(3) Select antifreeze according to the number of vehicles and the degree of concentration. Units and departments with a large number of vehicles and relatively concentrated vehicles can choose small-packaged antifreeze mother liquor. This antifreeze mother liquor has stable performance. Because it is small-packaged, it is easy to transport and store. At the same time, it can be flexibly prepared according to different environmental conditions and different work requirements to achieve the purpose of saving and practicality. If there are few or scattered vehicles, you can choose a direct-use antifreeze.
(4) Generally, you should choose an antifreeze that has anti-rust, anti-corrosion and descaling capabilities. The most important thing about antifreeze is anti-rust. Therefore, it is advisable to choose brand-name products. These products contain preservatives, corrosion inhibitors, anti-scaling agents and cleaning agents, and the product quality is guaranteed.
(5) Choose an antifreeze that matches the rubber sealing conduit. The antifreeze should not have side effects such as swelling and erosion on the rubber sealing conduit.