No passwords, No popups, No cost
we earn from your eBay & Amazon purchases

Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Adver-
tise
Help
Wanted
Current
Q&A's
Site 🔍
Search
curated with aloha by
ted_yosem
Ted Mooney, P.E. RET
- Pine Beach, NJ
finishing.com -- The Home Page of the Finishing Industry


  pub
  The authoritative public forum
  for Metal Finishing since 1989

-----

Coatings that are non-permeable to hydrogen



Parts of the equipment we're using is made of 17-4 PH (H900). This is not a recommended steel to use in a hydrogen environment. Overaging the steel seems a way to better its resistance, but we're also looking for coatings. So far I've found articles about gold, zinc and aluminum being used to coat parts, but I'm not sure of their value. What materials are non-permeable for hydrogen, and can be used for coatings ?

Emiel ten Berge
- Enschede, Overijsel, the Netherlands
2002



Virtually nothing is 100.000% impermeable to hydrogen. My thought would be 0.0015" of Electroless Nickel. That will give you 99.+%, possibly 99.9+% Less than 0.0015" will give a lower percentage at a exponential rate. Precious metals like gold and platinum will also work, but they are several times more expensive. James Watts
- Navarre, Florida
2002


Thanks, could you point me to some literature or website about this ?

Emiel ten Berge
- Enschede, Overijsel, the Netherlands
2002




(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories:

Finishing
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g,
& Software


About/Contact  -  Privacy Policy  -  ©1995-2024 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"