Jäätymissuojaaineita

Jäätymissuojaaineita, commonly known as antifreeze, are chemical additives used to lower the freezing point of liquids, most commonly water. Their primary application is in automotive cooling systems to prevent the coolant from freezing in cold temperatures, which could damage the engine. They also raise the boiling point of the coolant, providing protection against overheating in warmer conditions.

The most common base for antifreeze is ethylene glycol, though propylene glycol is also used, especially in applications where toxicity is a concern. These glycols are miscible with water and significantly reduce its freezing point while increasing its boiling point. The concentration of antifreeze in the water determines the extent of this protection. A typical mixture for automotive use is a 50/50 ratio of antifreeze to water, offering protection down to approximately -37°C (-34°F).

Beyond automotive use, antifreeze can be found in various industrial applications such as heating and cooling systems, geothermal systems, and even in de-icing fluids for aircraft. The selection of an appropriate antifreeze depends on factors like the operating temperature range, material compatibility, and environmental regulations. It is important to note that while effective, antifreeze solutions can be toxic if ingested and should be handled and disposed of responsibly.