No passwords, No popups, No AI, No cost:
we earn from affiliate purchases

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

  The authoritative public forum
  for Metal Finishing since 1989
  mfhotline


  -----

Smut on powder coated parts after curing

SUGGESTED POWDER COATING BOOKS
for Shops & Engineers


powdercoat_pietschmann2023
"Industrial Powder Coating: Basics, Methods, Practical Application" by Judith Pietschmann (2023)
avail from eBay, AbeBooks, or Amazon

powdercoat_liberto2003
"User's Guide to Powder Coating" by Nicolas Liberto (2003)
avail from eBay, AbeBooks, or Amazon

powdercoat_utech2002
"High Performance Powder Coating" by Bob Utech (2002)
avail from eBay, AbeBooks, or Amazon

powdercoat_liberto1994
"Powder Coating. The Complete Finisher's Handbook" by Nicolas Liberto (1994)
avail from eBay, AbeBooks, or Amazon

powdercoat_sys_lehr1991
"Powder Coating Systems" by William Lehr (1991)
avail from eBay, AbeBooks, or Amazon

powdercoat_tech_harris1976
"The Technology of Powder Coatings" by S.T.Harris (1976)
avail from AbeBooks, or Amazon

"Fundamentals of Powder Coating by Emory Miller & David Taft (1974)
avail from AbeBooks, or Amazon

(as an Amazon Associate & eBay Partner, we earn from qualifying purchases)

Q. I have a problem with high gloss black. It usually happens on thick parts, die cast iron and die cast aluminum when I apply high gloss black powder on parts.

After curing there is some kind of grey smut all over the part. It can be wiped off with clean cloths or polishing machine. But sometimes I need to do a very hard wipe to get this smut off. Result is less gloss, less shine after wiping.

I need help to fix this problem please. I've been searching answer for a while but seems like no one has this problem.
The result came up as photo attached.

61667-1

My coating procedure is:
- degrease
- Strip old color by chemical
- Rinse by DI. Water
- Dry by air blow gun
- Sandblasting
- Rinse by Di. Water
- Dip in Zirconium bath
- Dry by air for 12 hours+
- Heat up in gas oven before coating at 120 °C for 15 minutes
- Wait for temperature decrease
- Apply powder color
- Bake at 200 °C for 15 minutes

Kantinon Worawutwakin (Bell)
- Phitsanulok Thailand
May 14, 2024




(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"