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DaniloTraverg
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[*] posted on 30-9-2023 at 12:12
Would cutting aluminum foil under solvent prevent passivation?

Just something I've been wondering, since using a solvent that doesn't dissolve oxygen (anything but water?) would prevent aluminum oxide from forming and keep the newly exposed surfaces pure aluminum.

Would this work, and has anyone tried it?
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Fulmen
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[*] posted on 30-9-2023 at 12:32


Yeah, but only to a degree and for a short while. It's hard to completely prevent oxidation outside of a noble gas atmosphere. But I have successfully tinned aluminum foil using some oil (silicon perhaps, I forget), although it was always a bit hit-and-miss.





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DaniloTraverg
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[*] posted on 30-9-2023 at 12:38


Quote: Originally posted by Fulmen  
Yeah, but only to a degree and for a short while. It's hard to completely prevent oxidation outside of a noble gas atmosphere. But I have successfully tinned aluminum foil using some oil (silicon perhaps, I forget), although it was always a bit hit-and-miss.



By your estimation, would this method be useful for making aluminum isopropoxide under isopropanol?
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cirrostratus
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[*] posted on 30-9-2023 at 21:54


Hey,
I've done a bunch of experiments with Aluminum Isopropoxide.

I've always been able to use scissored-up aluminum foil for making it, just with a catalytic amount of Iodine in the reaction flask. Even just a couple of prills worth in a 500 ml set up. It takes a while for the reaction to get going though (like a couple of hours) so I usually just let it reflux for a while.

Catalytic Iodine is also great for similar purposes in Grignards.

[Edited on 1-10-2023 by cirrostratus]
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unionised
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[*] posted on 1-10-2023 at 01:25


Quote: Originally posted by DaniloTraverg  
a solvent that doesn't dissolve oxygen


Easier said than done.
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SnailsAttack
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[*] posted on 7-10-2023 at 02:06


Quote: Originally posted by unionised  
Quote: Originally posted by DaniloTraverg  
a solvent that doesn't dissolve oxygen

Easier said than done.

I think most non-polar solvents have an affinity for the diatomic gases, though I haven't been able to find any data for this.



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