What is the function of automotive antifreeze?
3 Answers
Automotive antifreeze serves the following purposes: 1. Provides freeze protection for the engine against low-temperature environments; 2. Prevents the coolant from freezing and cracking the radiator or damaging the engine cylinder block and cylinder head when parked in cold winter conditions; 3. Offers efficient heat dissipation. Also known as engine coolant, automotive antifreeze contains substances that lower the freezing point of water, allowing vehicles to operate in winter temperatures while keeping the cooling system from freezing. The composition of automotive antifreeze includes: inorganic compounds like calcium chloride, and organic compounds such as methanol, ethanol, ethylene glycol, glycerin, lubricating oil, and purified water.
Having driven for over two decades, I know how crucial antifreeze is—it's not just for winter protection. It lowers the coolant's freezing point to prevent engine damage from ice expansion, and in summer, it raises the boiling point to avoid overheating. I learned the hard way when I once forgot to add antifreeze—sub-zero temperatures froze the cooling system, costing me thousands in engine repairs. It also prevents rust and corrosion in radiators and pipes, extending part lifespans. My advice: use a tester before winter to check concentration, replace it entirely every 2-3 years with reputable brands. Don't underestimate this small investment—it saves major repair costs when it counts.
As a car enthusiast, I've done extensive research on antifreeze. Essentially, it's coolant with special additives, serving two key purposes: lowering the freezing point to -10~20°C to prevent coolant from freezing, and raising the boiling point above 120°C to prevent bubble formation and evaporation under high temperatures. Additionally, the formula contains corrosion inhibitors and descaling agents to protect the entire cooling system from rust and corrosion. When modifying cars, I pay special attention to this—using premium antifreeze ensures smoother engine operation, especially in extreme cold or heat. Regular checks on concentration and pH levels, plus avoiding mixing different types, are crucial for optimal performance.
