Finishing on Top of Polyester Powder Coated Cast Aluminum
Question: I want to apply a finish on the cast aluminum parts consisting of polyester powder coating.
Share
Question:
I want to apply a finish on the cast aluminum parts consisting of polyester powder coating. Before painting, the parts are finished with polyester filler and hardener and then are sandblasted. Will the polyester/epoxy powder cover the surfaces uniformly or is it possible due to the filler using to have gassing on the surfaces? Is the compatibility between the filler and polyester/epoxy powder good? D. V.
Answer:
You will most likely experience outgassing through the powder coating using this kind of filler. Additionally, you will have poor electrostatic attraction of the powder coating using this filler. Try using Lab Metal from Alvin Products and you won’t have either problem. This filler is aluminum based, readily sanded, is conductive for good grounding, and heat stable. They are listed in www.pfonline.com/suppliers.html.
RELATED CONTENT
-
Preparation of Stainless Steel for Powder Coating
Should type 316 stainless steel castings be sandblasted before powder coating, or can they be chemically etched? Should the parts be pre-heated in an oven before coating?
-
Understanding Infrared Curing
Infrared cure is gaining increased attention from coaters as a result of shorter cure cycles and the possibility of smaller floor space requirements when compared to convection oven curing.
-
Touch-up Options for Powder Coated Parts
Is it true that powder coating cannot be touched up? Powder coating expert Rodger Talbert offers options for powder coating touch-ups.
