[Ndx]

Hey All,

Sorry if this is wrong section...

I'm building diy water carbonation machine.

All co2 tanks that I can get are aluminum, I'm concerned about alu leaching to co2 and then being pushed in to water.

Any ideas is this valid concern.

Thank you

[Borek]

You mean compressed gas tank? Then no, there will be no aluminum in the gas.

[Ndx]

Thank you Notes, even if the co2 is in liquid state in aluminum tank before it's pumped to water ?

Thank you

[Borek]

No, Al won't dissolve in liquid CO₂. That is, everything is soluble in everything to some extent, but in this particular case everything goes against Al solubility, so the amount of Al in the liquid CO₂ will be below any detection limits.

Plus, liquid CO₂ won't ever come into contact with water, at some place it will boil becoming a gas before being dissolved. At this place any Al - if it were present - would simply drop out leaving a solid residue. No chance of that happening here though, see the reason one.