Antifreeze is a commonly used chemical agent used to protect a vehicle's cooling system from damage caused by a cryogenic environment. People often focus on the shelf life of antifreeze, i.e., how long it is in use. This article will elaborate on the shelf life of antifreeze from four aspects.
Firstly, the basic composition and principle of antifreeze were introduced. Secondly, the influence of storage conditions on shelf life is illustrated. Then, the change in the shelf life of the antifreeze after opening was determined; Finally, how to judge whether the antifreeze is expired and how to replace it reasonably are summarized.
The basic composition and principle of action of antifreeze
Antifreeze usually consists of additives such as water, ethylene glycol, or propylene glycol. Its main role is to lower the freezing point of the coolant and increase the boiling point, ensuring that the engine can operate normally in extreme temperatures. Additives in antifreeze also act as anti-corrosion, lubrication and prevent limescale formation.
Effect of storage conditions on shelf life
The shelf life of antifreeze is affected by the storage conditions. It should be stored in a dry, cool place, away from direct sunlight and high temperatures.
High temperatures accelerate the decomposition and volatilization of additives in antifreeze, reducing their performance and shelf life. Therefore, the right way to store it can prolong the life of antifreeze.
Changes in shelf life after antifreeze opening
Once the antifreeze is opened, its shelf life is reduced. This is because oxygen in the air initiates an oxidation reaction that leads to the degradation of additives in the antifreeze. In addition, opened antifreeze is susceptible to contamination and may introduce impurities or bacteria, further reducing its quality and shelf life.
How to determine whether the antifreeze is expired and how to replace it reasonably
In order to ensure the proper operation and safety of the vehicle, the quality and shelf life of the antifreeze need to be checked regularly.
There are several ways to tell if antifreeze is expired: observe whether the appearance is discolored, odorous or precipitate; Measure freezing point and boiling point using professional test instruments; Refer to the shelf life information provided by the manufacturer.
Conclusion
In general, unopened antifreeze can last for a long period of time, usually 2 to 5 years, when stored correctly. However, once opened, the shelf life of the antifreeze decreases.
Proper storage and regular inspections can extend the life of antifreeze and ensure that it functions properly in extreme temperatures. When the antifreeze has an abnormal condition or exceeds the shelf life, it should be replaced in time to ensure the safety and reliability of the vehicle.