Quote:
Originally Posted by SkullWorks
interesting, a couple of notes
1.) I didn't see paper or cellulose in there.
2.) Their list of metal (quoted) seems like BS, they have aluminum alloy as one simple line...I have a problem with that , there are dozens if not hundreds of grades of Aluminum, and all are alloys...Pure aluminum is nearly useless for most applications.
3.) They state 6061 and it's oxide layer are suitable for E-85? yet Aluminum must be plated before use in gas stations? 6061 is the most readily available and widely used alloy of Aluminum that I can think of only Al 356 comes close (casting alloy)
4.) Did they maintain the concentration of ethanol somehow, was it constantly replenished? Ethanol (or most alcohols) are hygroscopic, they will absorb their own weight in Water given enough exposure to the humidity in the air. and Ethanol at 110f doesn't hand around very long, the rate of evaporation is pretty substantial in that condition
5.) it is common knowledge (in some circles) that you must anodize Al fuel lines for use in a E-85 application due to the increased risc of corrosion due to the water holding abilities of E-85
What say yee?
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1) Don't think paper was in the scope of their test.
2) McMaster has 17 types. They even state that 6061 is the most common for automotive components.
3) Just above that, I mention a Dept of Energy publication that recommends nickel plating aluminum. Certain advanced alloys are likely to be OK, but unless you know the content... there's alot of variance in "aluminum" so plating is a smart idea.
4) If I were a betting man, I'd say they put a bunch of large beakers in a sealed oven (separated from the heating element of course). Set 1 sample in each beaker, hang the other above it. Let it sit for a month, checking occasionally for issues. Weigh the samples pre- and post-test on a digital gram scale. Closed environment means humidity control.
5) E85 responds very differently since it is anhydrous ethanol + gasoline. It gets all of the water separated out before blending. Once it's blended, it's fairly stable... but you're right it can absorb water from the air. E100 (in Brazil and other places) is hydrous ethanol that has 1% water and 99% ethanol. That kind of fuel has it's own can of worms... but it is a simpler fuel to design around (if you happen to have acres of sugar cane lying around).
Thanks for the discussion. Always good to find people with some brains and experience BOTH.
On a lighter note... anybody have a guess what the adhesive is? wood glue? epoxy? Elmer's? Place your bets!