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Engine Coolant: The engine coolant is an antifreeze mixture. |
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| Ethanol, isopropyl alcohol, methanol, propylene glycol, and ethylene glycol when added to water, reduce water's freeze-point. Ethylene glycol is the most common antifreeze used in the automobile industry. Antifreeze also contains corrosion inhibitors and anti-foaming agents. Borates, phosphates, nitrite, and thiazoles are added to reduce corrosion. Nonionic surfactants, silicones, and organic phosphates are used to reduce foaming. | |
The concentration of an antifreeze mixture is represented as: antifreeze percentage by volume. Example: one Gallon of antifreeze added to one gallon of water would be a 50% mixture of antifreeze to water. |
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