Jäätymissuojaainetta

Jäätymissuojaainetta, commonly known as antifreeze, is a substance added to liquids to lower their freezing point. In the context of automotive cooling systems, it's primarily used to prevent the coolant from freezing during cold weather. Freezing can cause the coolant to expand, potentially damaging the engine block, radiator, and hoses. Antifreeze also raises the boiling point of the coolant, which helps prevent the engine from overheating in hot conditions.

The most common type of antifreeze is ethylene glycol, though propylene glycol is also used, especially in applications where toxicity is a concern. These glycols work by interfering with the hydrogen bonding of water molecules, making it more difficult for them to form a solid ice structure. Beyond its freezing and boiling point modification properties, antifreeze also contains additives to prevent corrosion and rust within the cooling system. These inhibitors protect metal components from degradation.

Different types of antifreeze exist, often identified by color, such as green, orange, pink, or yellow. These colors are dyes to help identify the type and brand, and also to make leaks more visible. It is crucial to use the correct type of antifreeze recommended by the vehicle manufacturer, as mixing incompatible types can lead to reduced effectiveness or even damage to the cooling system. Regular checking and maintenance of the coolant level and condition are essential for optimal engine performance and longevity.