-- The Home Page of the Finishing Industry

on this site
current topics

60,000 Q&A topics -- Education, Aloha, & Fun

topic 17477

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


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


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

Emiel ten Berge
- Enschede, Overijsel, the Netherlands

adv.   accurate anodizing banner   

Q, A, or Comment on THIS thread SEARCH for Threads about ... My Topic Not Found: Start NEW Thread

Disclaimer: It's not possible to 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 may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental Compliance

©1995-2020, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.