Re: that would be very very bad... - Saab General Bulletin Board - Saabnet.com
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Re: that would be very very bad...
Posted by Bob S [Email] (more from Bob S) on Mon, 29 Sep 2003 11:35:39
In Reply to: that would be very very bad..., Dean, Sun, 28 Sep 2003 18:11:37
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>BF is a combination of a few high molecular weight eithers (sp??). This is not oil! BF will attack paint, so if you spill it wipe and wash with water ASAP. Water will rinse it away very easily.
I think you mean esters, not ethers. Esters are actually salts (well, that's a trick chem answer, as they're an organic chem analog to a inorganic salt ;-)). It's the alkyl group atached that makes it nasty.
What are the special properties of the esters that make them good for brake fluid? I understand that high boing point is mandatory for BF, but I would think that some oils could do the saem thing, especially considering that many cars have turbos now (I almost said 'all cars' there, but then realized that all cars aren't Saabs ;-).
Considering the low viscosity of BF, I would think that it would leak more than it does.
The one possible reason I vould see for using such nasty stuff is that the viscosity doesn't change much with temperature.
>BF will trash many types if rubber.
Yeah. It dissolves it. Actually, some oils will do the same over time. Other oils will just swell the rubber.
Makes things nice and shiny, too, at least for awhile. A common. legendary trick of used car lots was to wipe all the rubber and plastic trim down with brake fluid, makes thm look nice and shiny new.... for awhile.
So, what's the overwhelming reason such nasty stuff is used for brakes?
-----
Bob S
posted by 64.12.9...
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