Here is the structure of ethylene glycol and again the two OH groups make it a diol. The structure of ethanol (the stuff your drink)l contains one OH group, as does any alcohol. Notice the two OH groups, that makes it a diol. By putting ADH in it, it makes it less toxic as it will not be metabolized by the liver into other toxic chemicals. I found out that if you drink this stuff, your liver thinks it is alcohol since it is chemically similar. There is another interesting ingredient in it, ADH which is Alcohol DeHydrogenase inhibitor. So that pretty much confirms that it is just pure antifreeze. Since it is non-toxic they have probably chosen propylene glycol and perhaps another one that is non toxic. Diol is the more correct name for a glycol. The folks at Evans kindly sent me their MSDS. Do you remember that thing that was like a magnet you were supposed to put around your fuel line that supposedly aligned the molecules to make them burn better? Looks like it would be more restrictive to airflow rather than help it. I had to look that one up since I didn't know what it was. Here is another page discussing the proportions of antifreeze. I think they are trying to make you feel that it is a magic solution when in fact it is just pure propylene glycol at a tremendously inflated price. I would just stick with 50/50 conventional antifreeze. Of course there are others that swear by it, the main benefit being corrosion resistance. So some complaints I read about in various forums say that the engine does run quite a bit hotter. These phase diagrams are measured at a pressure of 100kPa or 14.5psi, about the pressure you would have in your cooling system. A pure glycol takes more power from the engine to push it through the system. Second, glycols are very viscous or thick (viscosity 0.581 poise, almost 58 times thicker than water). A glycol has about 1/2 the heat capacity of water. So reducing the amount of glycol means it can transfer more heat from the engine. First, water has a higher heat capacity than glycols. However, we use 50/50 solutions for several reasons. Here, the optimal solution would be 65% for ethylene glycol and 60% for propylene glycol for optimal freeze protection. From this you can find eutectic points, that is where the solution changes from a liquid to a solid or gas. In chemistry, the properties of solutions can be visually displayed in a phase diagram where temperature is on the Y-axis and the percent solution is on the X-axis. Of course it does, but that doesn't matter in a 50/50 system pressurized to 13-15psi. One of their claims is that it has a higher boiling point than water. It is also biodegradable, but so is ethylene glycol. Since their brochure for the product I was looking at says it is non-toxic, then it is most likely pure propylene glycol, which you will find in some foods. this particular MSDS shows that it is pure ethylene glycol. It is just pure ethylene and propylene glycol, and yes, some water. I browsed around a bit and did some research on this stuff.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |