![]() ![]() The answer to this predicament was (and still in many cases) is ethylene glycol. There was a need for a liquid that would offer the depression in freezing point normal alcohol such as ethanol would, yet not boil over early like the former did when it formed a mixture with water. Inorganic Acid Technology (Ethylene Glycol) Unfortunately, the boiling point of alcohol was much lower than water, which would mean the resulting mixture would also boil very early (around 80 degrees Celsius), needing frequent top-ups. Alcohol formed a mixture with water which would lead to a “depression” in freezing point, thereby preventing freezing. In order to overcome the former, alcohol was added to water and used as a coolant. This would also impact the heat transfer (by forming oxides) and cause issues in both the radiator and engine block. This rust would eventually choke the radiator over time too.
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