Material resistant to water, oxygen and nitrogen for permeability testing

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Cadman5150
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Hello gentlemen -

New to the forum here! ... I have what I hope is an easy question for my Materials & Chemical buds.
Is there any material that is 100 percent non-corrosive against water and oxygen (sometimes nitrogen)? ... I work for a Gas Analytical company, whereas we test the permeability for different materials.
To do so, we run a mixture of water and oxygen (or nitrogen) through these units.

Not sure if I'm really explaining this well enough.
I'm basically looking for a material that will be non-corrosive, or a "treatment" that would satisfy the objective.

Any help would be so appreciated.

Mike
 

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Welcome to PF.
Maybe Polyethylene. PE powder coated.
You give chemical properties, but what physical characteristics must the material have?
 
Thanks Baluncore - the material would most likely be Aluminum (6061 or sim.)