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





-----

PTFE impregnation of aluminum anodizing





2002

We are also looking for a PTFE-related process which complies to MIL-A-63576 [affil link]A (AR) Type I - the impregnation process on unsealed anodic coatings.

Please advise?

Alex Chong
- Singapore



April , 2009

Hi, Alex. This specification is for a PTFE coating/impregnation on unsealed hardcoat anodizing. It was cancelled in 1998 and last revised in 1985, so it's getting rather dated.

But I don't see any Qualified Products List associated with it, which I believe would mean (unless it's there and I missed it), that you can use anything that works and allows the parts to comply with the rest of the specification.

Some of the experienced anodizers here have pointed out [see letters 1819] that PTFE particles are larger than the anodizing pores, such that it really isn't an "impregnation" process; further, the spec itself speaks of coating the "asperities" rather than impregnating the cavities.

A coating material was suggested in those referenced letters, and hopefully a reader will suggest additional alternatives. Good luck!

Regards,

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey



November 25, 2009

Hi! Alex,
Let in my knowledge, PTFE Impegration on anodized surface is a only one kind of sealing process which fills the cracks devloped during the anodizing process and gives the smooth surface with lubricity.

Thanks,

Tejas Badheka
- Ahmedabad,Gujarat, India




(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