Basic Specifications for the Quality of Finish
Question: I am writing a basic specification for procuring parts that are to be powder coated with a semi-gloss black.
I am writing a basic specification for procuring parts that are to be powder coated with a semi-gloss black. I am having a difficult time defining the quality of the finish. That is how the part looks. This is beyond describing the level of gloss. The finish is to be smooth but is there a way of defining acceptable levels of visual defects? M. R.
The Powder Coating Institute in Alexandria, Virginia has “smoothness standards” that can be just the thing for you. They have a scale from 1 to 10 that is used to rate the smoothness of a powder coating surface. You can purchase these test panels, in an attractive case, from them directly. Visually evaluate which panel has the surface smoothness you want and note the number on the back. Write the following statement in your coating services specifications: “Smoothness in accordance with PCI smoothness standard #___.” That should take care of it.
Powder coating is one of the most durable finishes that can be applied to industrial manufactured products, and offers excellent corrosion protection and is very safe because of its lack of volatile organic compounds.
Question: What methods are available for removing cured powder coatings, and what are the pros and cons of these methods?
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.