jäätymissuojaaineen

Jäätymissuoja-aine, commonly known as antifreeze, is a substance added to liquids to reduce their freezing point. In the context of automotive coolants, its primary function is to prevent the engine's cooling system from freezing in cold temperatures, which could cause severe damage to components like the radiator and engine block. While reducing the freezing point, it also raises the boiling point of the liquid, thus improving the cooling efficiency during hot weather and preventing the coolant from boiling over.

The most common type of antifreeze is based on ethylene glycol or propylene glycol. These glycols are mixed with water, typically in a 50/50 ratio, to achieve optimal freeze and boil protection. Ethylene glycol is highly effective and inexpensive, but it is toxic if ingested. Propylene glycol is less toxic, making it a safer alternative in applications where accidental ingestion is a concern, although it can be slightly less effective and more expensive than ethylene glycol.

Antifreeze also contains a package of additives designed to protect the cooling system's components from corrosion and erosion. These additives can include silicates, phosphates, organic acids, and other inhibitors that form a protective layer on metal surfaces. Over time, these additives can deplete, necessitating the replacement of the antifreeze to maintain its protective properties and prevent damage to the cooling system. Regular checks of the coolant level and condition are important for engine longevity.