Methanol and metal comparability.

Gallery, Projects and General > How do I??

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dawesy:
Could be. I'd have to sit and work out the volume (maths is my Achilles heel )
Needs to hold about 5ltrs. Also want 316l if it's stainless. Not sure on the grade of that. Very cheap though. ;)

vtsteam:
Lee, I make it 3820 CC

dawesy:
Cheers for that, saves me melting my brain later :D
Mmm could do with it a bit bigger really.

Will_D:
Quote from the Wiki:

"One of the potential drawbacks of using high concentrations of methanol (and other alcohols, such as ethanol) in fuel is the corrosivity to some metals of methanol, particularly to aluminium. Methanol, although a weak acid, attacks the oxide coating that normally protects the aluminum from corrosion:

6 CH3OH + Al2O3 → 2 Al(OCH3)3 + 3 H2O

The resulting methoxide salts are soluble in methanol, resulting in a clean aluminium surface, which is readily oxidized by dissolved oxygen. Also, the methanol can act as an oxidizer:

6 CH3OH + 2 Al → 2 Al(OCH3)3 + 3 H2

This reciprocal process effectively fuels corrosion until either the metal is eaten away or the concentration of CH3OH is negligible. Concerns with methanol's corrosivity have been addressed by using methanol-compatible materials, and fuel additives that serve as corrosion inhibitors."

Recall that its the oxide layer that protects the metal (just like the chromium oxide layer on stainless steel)

I also know also from first hand experience that tomato soup and its mould can eat through 1mm of aliminium saucepan in about a week

dawesy:
I've used water injection for a while and yet to see any adverse effects. As its a fine mist it never really contacts the port walls and is burnt in the combustion process. The only area that I had doubts on was the storage vessel.
I'm using a plastic fuel can at the mo but it looks a bit bodged hence the fabrication of something a bit more permanent.
Good info though.

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