The problem with long term media storage is not deterioration but lack of
playback hardware. I have lots of media from a mere 25 years ago that
cannot be read, not because of deterioration but because no hardware is
available. Try to find a punch card reader, a paper tape reader, a Sony
PortaPak reel-to-reel video player, a Beta video player, a video disk
player, a Polaroid film projector, an 8-track tape player, an 8 inch drive,
a single-sided 5 1/4" Apple II drive, a CP/M single density Osborne drive,
any number of tape drives, and so on.

Unless you are packing the hardware away with the media, deterioration is
not going to be your problem...

Is this an art project? Or does someone actually expect to retrieve this
data?

"James" wrote in message
oups.com...
The chamber is going to be around 6" in diameter and 12" in length,
wall thickness is going to be 5mm. Its purpose is to hold data disks
for long term storage. The chambers are going to be placed into fire
safes and the safes will be placed into underground bunkers.

Would plating the Stainless with gold help prevent corrosion?

The chambers will be filled with nitrogen gas to help preserve the
disks. What would you recommend for a seal? It cannot be any substance
such as rubber due to outgassing. I need something that makes a good
seal and does not deteroriate rapidly. The chambers will be opened
periodically, around every 50 years to refresh the disk media.

Can you also recommend a good machine shop in the Phoenix, AZ area? I
need a place that can weld all the pieces together.

Thank you for your help.