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Powder Coating Clinic: Discoloration of Metal-Flake in Powder
Q. We have a metal-flake silver powder color that we use regularly. If the surface is abraded with a Taber wheel—or even a pencil eraser—it darkens significantly in the abraded area. We even have this problem when our parts scrape against cardboard ...
Ask an Expert Published: 11/1/2016
Powder Coating Clinic: Measuring Film Thickness before Cure
Q. How can I tell if the powder film build is thick enough before I cure the powder coating? We coat a lot of square footage and we need to control our cost. We often put on too much powder to avoid light coating. I need to know what my uncured film...
Ask an Expert Published: 11/1/2016
Powder Coating Clinic: Sanding for Repair
Q. We sand aluminum die-cast parts that have minor defects in the powder coating before recoating them. The small areas of dirt, metal blemishes, fibers or similar particles are sanded using 120-grit sandpaper on an orbital sander. After recoating t...
Ask an Expert Published: 11/1/2016
Parts Cleaning Clinic: Brass Cleaning
Q. How do I clean brass to be powder coated? Expert David Peterson explains that, assuming you have some mill oil or metalworking lubricant on the surface of the brass, the minimum pretreatment needed is a degreasing of some type.
Ask an Expert Published: 11/1/2016
Parts Cleaning Clinic: Cleaning of Inconel
Q. What cleaning methods are recommended for finishing Inconel 718? Can this material be passivated or utilize the Summa process as 300 and 400 series stainless steel, or is there another way to remove the contaminants in regards to machining parts ...
Ask an Expert Published: 11/1/2016
Parts Cleaning Clinic: Phosphate Coating Problems
Q. We electrocoat sheet metal, iron castings (machined and non-machined) and aluminum castings (machined and non-machined surfaces) and are having problems with poor phosphating on aluminum substrates. We maintain the free acid at 0.7-1.1 points and...
Ask an Expert Published: 11/1/2016
Parts Cleaning Clinic: Pretreatment Equipment Suppliers
Q. I am researching manufacturers of aqueous part washers and phosphate pretreatment systems for powder coating, looking for companies that build conveyor systems, washers and treatment systems; not parts washers. The parts to be cleaned are various...
Ask an Expert Published: 11/1/2016
Powder Clinic: Fillers for Powder Coating
How do you choose the right filler for your powder coating process?
Ask an Expert Published: 10/1/2016
Powder Clinic: Powder Coating Small Parts
Parts vary in size and shape, making it difficult to find "the best" process for painting small pieces.
Ask an Expert Published: 10/1/2016
Powder Clinic: Powder Versus Galvanizing
Powder Coating or Galvanizing: Which offers the best long-term protection from corrosion?
Ask an Expert Published: 10/1/2016

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