Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site
pub Where the world gathers for
plating, anodizing, & finishing Q&As since 1989





-----

Coatings that are non-permeable to hydrogen





2002

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


none
finishing.com is made possible by ...
this text gets replaced with bannerText
spacer gets replaced with bannerImages



(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:

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


About/Contact    -    Privacy Policy    -    ©1995-2023 finishing.com, Pine Beach, New Jersey, USA