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Associate

Join Date: Sep 2007
Location: Arizona
Posts: 41

Antifreeze Additive Packs

07/15/2009 1:25 PM

I have been asked to supply additive packages for ethylene glycol based antifreeze. I know that a automotive cooling system is baiscally a closed loop heat transfer system and that corrosion is a major concern. The problem is that there are so many types. I know that most are just dyes added for marketing purposes and warranty claims but there are some newer ones with organic inhibitors. What are they?

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Guru
Popular Science - Weaponology - Cardio-7

Join Date: Oct 2006
Posts: 621
Good Answers: 10
#1

Re: Antifreeze Additive Packs

07/17/2009 8:42 AM

The anti-corrosion additives are amines, such as methyldiethylamine, methyldiethanolamine, dimethylethanol amine and similar. Obtain some glass jars, fill 3/4 full with ethylene glycol, add 1/2 % by weight of different amines to each jar, (and a control with no amine additive), add a non-corrosion protected iron nails to each jar, seal, and watch over a period of a few weeks. Amazing! professional testors use things like salt water-spray chambers and humidity chambers to check corrosion.

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