"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.


Your concern about corrosion is not understandable. Stainless should
withstand thousands of years without any type of preservation under the
conditions you've described. . Simply have it passivated after it has been
manufactured. I doubt you'd see enough change in the appearance in 100
years to know it's even been stored. I have remnant pieces that I've had
for well over 30 years, all of which went through 4 years of storage in a
damp container. They don't look any differently today than they did 30
years ago, and they didn't have the luxury of being passivated. That's
the beauty of stainless.

You're on your own where seals are concerned, but I think I'd research
various O ring compounds. Surely one of them would suit your needs.

Harold