Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site

Chime right in! (no registration req'd)

-----

"Electroless Nickel and Oxygen"



2005

We are considering high Phosphorous electroless nickel coating for an Oxygen system.
Some platers have reservations about EN in pure Oxygen.
I would appreciate any advice.
If EN is not applicable what other low friction coating should be used for mass production shaft in a medical device.

Ariel Ring
- Israel
^


2005

Pure Oxygen is not the same thing as an oxidizer, but in certain situations it may behave in a similar way. So, it would be logic to use a coating that resists oxidizing agents better. I would say chrome is better than nickel for your application.

Guillermo Marrufo
Monterrey, NL, Mexico
^


2005

Oxygen will not attack EN at ambient temperature. EN is commonly used for pressurized gas applications in the USA.

However, your platers may be afraid that the coating will flake off and damage the oxygen system. EN does require careful pretreatment to ensure good adhesion.

Ron Duncan
Ron Duncan [dec]
- LaVergne, Tennessee
It is our sad duty to note Ron's passing on Dec. 15, 2006. A brief obituary opens Episode 13 of our Podcast.

^


2005

Ron, you are correct, one of the Chemical Engineers we use think that Nickel particles might occur, though it is rotating against Aluminum at maximum ambient temperature of 50C (122F).
Guillermo, is it possible to use Chrome, (would that be hexavalent Chrome?) in a non-invasive medical device? With the porous nature of Chrome plating, we are concerned that rust might occur on the 1040 shaft.
Thank you both for your input.

Ariel Ring
- Israel
^


2005

Rust (penetration of the plate) is always a possibility when the substrate is carbon steel especially if the environment is O2. But it can be aleviated by an under layer of electrolytic nickel. I don't know if chrome is banned for this particular application. And yes, I was talking about hex chrome.

Guillermo Marrufo
Monterrey, NL, Mexico
^

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

Q, A, or Comment on THIS thread SEARCH for Threads about ... My Topic Not Found: Start 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    -    ©1995-2021 finishing.com, Pine Beach, New Jersey, USA