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can compressed gas leak through a metal tank? Answered

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so the other day i was talking with my friend and  he told me that gas can leak out of a metal tank.  he said gas can leak out of scuba tank going through the metal just like it goes through a latex balloon.  so i wanna know is this true?  could gas leak out (given enough time) through a 12 gram CO2 tank used for airsoft for instance?

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lemonieBest Answer (author)2010-06-24

Alloy-rims are porous, that's why they are lacquered.
Helium & Hydrogen are small and "difficult", but CO2 is big and heavy - it's not going to leak through steel.

L

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didgitalpunk (author)2010-07-19

exept if you modified the gas tank, it is made so well that it is not suposed to leak. although, when the gas tank is connected, it can leak a little.

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seandogue (author)2010-06-24

I'm almost sure I recall something about both hydrogen and helium being able to do so, at least thru aluminum and likely other metals as well. Grab your electron microscope and have a look. metal isn't quite as solid as one might think, and many are downright spongy..

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