Where the
world gathers for metal finishing
Q&As since 1989


-----

Time gap between powder coated material and oven loading

Dear Sir,
After coating the Aluminium LM - 25 with powder -
What is the maximum time which can be exposed to atmosphere
within what time it has to loaded into Oven for baking

Regards,

Ebenezer
Easun MR India - Gujarat, India
2005

---

If you are not worried by oxidation of the aluminium substrate, a gale is not passing through your powder shop, and it is not knocked or bumped -- my guess would be about two-three years.

Sheldon - Is this short enough? Terry

Terry Hickling
Birmingham, United Kingdom
2005

---

Hi Ebenezer,

Terry is partly right, the powder will be attracted to the object for a considerable amount of time. However the powder on your work piece is charged and will attract foreign objects causing defects in your final film and the coating of powder on the object is very "fragile".
I would recommend that the time between the spraying and curing be kept to a minimum to reduce the reject rate.

Hope this helps,

Drew Devlin
- Lincolnshire, UK
2005