What Are the Components of Automotive Antifreeze?
2 Answers
Automotive antifreeze consists of: inorganic substances such as calcium chloride, and organic substances including methanol, ethanol, ethylene glycol, glycerin, lubricating oil, and purified water. The functions of automotive antifreeze are: 1. Preventing the coolant from freezing and causing the radiator to crack or the engine cylinder block to freeze; 2. Effectively preventing boiling at higher temperatures, avoiding overheating; 3. Preventing rust, corrosion, scale, deposits, and foam formation. Automotive antifreeze, also known as coolant, is designed to allow cars to continue operating in low winter temperatures. Engine coolants are mixed with substances that lower the freezing point of water to prevent the cooling system from freezing in cold weather.
I always maintain my car. The main components of antifreeze are basic antifreeze agents like ethylene glycol or propylene glycol, diluted with purified water to prevent freezing. Additives such as corrosion inhibitors protect metal parts from rust, buffers maintain pH balance, and dyes use green or red colors to indicate different formulations. The ideal ratio is usually 50:50 antifreeze to water to avoid freezing and cracking the radiator in cold winters. It also needs to be replaced regularly—I usually do it every two years, draining the old fluid to prevent sediment buildup and avoid engine overheating damage. When choosing a brand, check the instructions to match your car model for peace of mind.