Is aluminum a bad choice for a bho tube material, why?

nope until i get a heady glass one next time, it will be aluminum. i washed it soap and water and washed it in rubbing alc. i hope there is nothing there but a shiny slide. butane-aluminum reaction? will it eat it??
 
you may not taste it or smell it, but it doesn't mean there shouldn't be cause for concern. aluminum resists oxidation and corrosion via a process called passivation which basically means the metal by itself in nature and sometimes artificially (think galvanized steel) creates a thin oxidized protective layer to make the metal resistant to corrosion. this oxidized layer while invisible to the naked eye could easily leech into the butane since butane is such a volatile liquid it tends to seed and "eat" oxidized particles with ease.

It's best to use stainless steel or glass. the highest yielding method I have found after about 80 runs of varying size (6 grams to 2 oz. of dry honeycomb) is to use small thin stainless steel tubes. It's tempting to use huge 2 ft long 3" wide tubes but your yield will lower significantly and you will have to use more butane to fully flush. Another problem with large tubes is often you will get dry pockets where no butane will hit because the butane found and established a route with less resistance.

A great turkey baster to use is this:

http://www.amazon.com/Norpro-5898-S...sr=1-1&keywords=stainless+steel+turkey+baster

notice it's small profile. What I do is buy 16 so you can fill up at the same time and extract at the same time. the main benefit to this is that every piece of plant matter gets soaked even if the butane channels. in addition you are using stainless steel which does not oxidize and hence no chance of leeching unwanted particles.

if you are making this oil you owe it to yourself and anyone else you offer the oil to to make sure that it is as pure as possible. if there is even a chance that something could leech, wouldn't it make more sense to just use what is already known to work.

basically you are risking long term health effects for a few bucks.
 
My theory is flavor.
You know how beer from a bottle always tastes better than a can?
Same thing.
Wasn't it Coors that started lining their cans?
 
Take your finger and rub the surface for a bit you will see black transfer to your fingers.

That would be enough of an answer for me...

Brass and copper are not any better.

Be careful!
 
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