No registration or passwords; no pop-up ads -- just aloha, fun, & answers.
(as an eBay Partner & Amazon Affiliate earns from qualifying purchases).
Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Advertise
 
Help
Wanted
Current
Q&A's
Site 🔍
Search
pub  Where the
world gathers for metal finishing
Q&As since 1989



-----

PEELING OFF OF POWDER COATING FROM ALUMINIUM SECTION




In Aluminium cleaning of sliding windows, cleaning is done properly - anodised film is removed & then chromatising is also done properly. But in the creepage /joint parts, powder coating peels off.Powder coating temp. is also proper. Please help me by listing possible reasons & solutions to it.

Vinay Golwala
Shri Chem Industries - Bombay, India
2000



Vinay:

Sounds like classic delamination. We had a small issue similar to yours on both extruded and cast aluminum and found that our water supply to our wash tanks was 280ppm total dissolved solids. Our answer was a Reverse Osmosis water system that reduced our TDS to 30ppm or less...no more delamination. Regards,

Larry Smith
Tropitone Furniture Co. Inc. - Sarasota, Fl. USA
2000



Vinay:

The first thing I thought of is how thick is the powder in the corners? Most times the solutions to problems are easy ones but overlooked. If you have already checked this maybe run some tests on parts with 90 degree bends or more in them. Powder coat the inside of these parts at various thicknesses, to try to repeat the failure. I hope this helps.

Wayne Czerniak
- Grandora, SK, Canada
2000




(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  -  ©1995-2024 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"