plating, anodizing, & finishing Q&As since 1989
PTFE impregnation of aluminum anodizing
We are also looking for a PTFE-related process which complies to
[affil link]A (AR) Type I - the impregnation process on unsealed anodic coatings.
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!
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
November 25, 2009
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.
- Ahmedabad,Gujarat, India
Q, A, or Comment on THIS thread -or- Start a NEW Thread