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)

-----

"Is it possible to put a bias to improve the PVD on pieces powder coating?"



2005

I have some problem of chromium adherence (deposited by sputtering DC) on pieces made of aluminum and coating with epoxy powder.

I have a DC generator that I don't use, it was possible rather than to let the pieces in the ground, to plug them to this generator to improve the deposition (bias)? but as they are covered of epoxy, it is not anymore conductive! is what I am going to have an effect ?

Thank's
Gigi

DJ Gigi
plating shop - Switzerland
^


2005

The answer to your question is both yes and no. While your surface is insulating, as soon as you begin to coat it will become a conductor, and so you can bias the parts with your generator. However, it might not help. The value of biasing depends on the plasma density surrounding your parts. If you have little or no plasma, the bias is useless. If you are using a balanced magnetron for your sputter source, you probably don't have a great deal of plasma from the source reaching your parts. This means you might have to create the plasma near the parts by raising the voltage on the bias high enough to ionize the gas in the chamber near the parts (glow discharge ionization). How high depends on system geometry.

jim treglio portrait
Jim Treglio - scwineryreview.com
PVD Consultant & Wine Lover - San Diego,
California

^

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