No passwords, No popups, No cost
we earn from your eBay & Amazon purchases

Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Adver-
tise
Help
Wanted
Current
Q&A's
Site 🔍
Search
curated with aloha by
ted_yosem
Ted Mooney, P.E. RET
- Pine Beach, NJ
finishing.com -- The Home Page of the Finishing Industry


  pub
  The authoritative public forum
  for Metal Finishing since 1989

-----

Sealer after powder coating?




Q. Hello,

This is my 2nd question to this site. Thanks everyone for the help on the 1st question (20391).

The problem I have now is in the design of the part that I am coating. There is about a 1/8 inch gap about 1/2 deep that I can't get the powder into. After coating the part and setting the part outside for couple days I notice the part will start to rust inside this gap.

Is there some kind of sealer that I can dip my part into to seal up any of these types of spots after coating?

Thanks again Ron

Ronald D Flahart

2006


A. Hi, Ronald. I reviewed your 1st question and note that you were having an adhesion issue. Taking your two problems together I'm beginning to suspect that perhaps you aren't doing any pretreatment. You need to phosphatize before powder coating both for adhesion and corrosion resistance; and if the parts are to be used outside it really should be zinc phosphatizing. This will not totally prevent rusting but will make a big difference in corrosion resistance, as well as promote adhesion.

Please describe what you do to the metal before powder coating it. Thanks, and good luck.

Regards,

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




(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:

Finishing
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g,
& Software


About/Contact  -  Privacy Policy  -  ©1995-2024 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"