In winter, the temperature is low. In order to allow the car to continue to be used at low temperatures in winter, some substances that can lower the freezing point of water are added to the engine coolant as antifreeze so that the cooling system will not freeze at low temperatures. For this reason, people sometimes refer to coolant as "antifreeze" or "unfrozen liquid." The full name of antifreeze should be antifreeze coolant, which means antifreeze coolant. So, how to choose car antifreeze?
How to buy car antifreeze?
1. Five steps to choose antifreeze
1. Look at the appearance. Qualified antifreeze is clear and transparent, while unqualified antifreeze is very turbid.
2. Smell it. Qualified antifreeze has no odor, while unqualified antifreeze contains alcohol and other substances, so it will have some odor.
3. Look at the price. Only 2.5 liters of qualified antifreeze will be sold at a price of 30 yuan, but 25 liters of unqualified antifreeze will be sold at a price of more than 30 yuan.
4. Look at the freezing point. According to general standards, the freezing point of antifreeze is -25°C to -45°C. Antifreeze with a freezing point below -10°C should be fake antifreeze made of alcohol.
5. Look at the packaging. Regular products have complete markings and clear handwriting; counterfeit and shoddy products have unclear handwriting that is easy to erase, and internal and external packaging markings are inconsistent or incomplete. Second, don’t ignore the anti-scaling properties of antifreeze.
According to surveys, more than 70% of automobile cooling systems contain scale and rust, which seriously affects the heat dissipation function of the cooling system. We all know that hard water contains a large amount of alkaline substances, which turn into scale after heating and separation, and adhere to the metal surface inside the radiator. If it cannot be cleaned regularly, thick scale will seriously affect the function of the cooling system, causing the boiler to boil, lack of water, and even stick to the cylinder and burn tiles. Therefore, before replacing the antifreeze, we should clean the scale and rust spots in the water tank.
The best water tank cleaning agent is a dual-effect cleaning agent that removes scale and rust. There are two products on the market now, one is an early product that has no other functions except descaling, and the other is cost-effective. In addition to cleaning scale and rust, it can also lubricate and protect the cooling system.
Third, choose organic and environmentally friendly antifreeze.
Model antifreeze has excellent performance that traditional non-model products cannot match. First of all, more than ten kinds of organic additives are added to organic products, which do not contain silicon, phosphorus, chlorine, molybdate, nitrite and amine salts that are harmful to the environment and human body. Secondly, organic products not only have excellent anti-freeze properties, but also have super anti-boiling properties. The boiling point can reach more than 110 degrees Celsius (the boiling point of inorganic products is generally above 106 degrees Celsius). The thermal conductivity and heat dissipation are much better than inorganic products. As we all know, traditional inorganic antifreeze cannot be mixed with water, while organic environmentally friendly antifreeze can be mixed with water.
Not only that, organic products have excellent storage stability and a shelf life of up to 5 years, which traditional inorganic antifreeze does not have. It is understood that currently only Sinopec Lubricant Company among domestic manufacturers can produce such products and has independent intellectual property rights.
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