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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: Powder Versus Galvanizing
Powder Coating or Galvanizing: Which offers the best long-term protection from corrosion?
Ask an Expert Published: 10/1/2016
Parts Cleaning Clinic: Zinc Shot Blasting, Zinc Plating Alternatives
David S. Peterson talks zinc shot blasting, zinc plating alternatives, and advantages to reducing the heating of alkaline cleaners.
Ask an Expert Published: 10/1/2016
Powder Clinic: Pinholes Mentioned in July Issue
Q. Just read the article in most recent issue of PF about our problem and wanted to respond with what we found out.
Ask an Expert Published: 8/23/2016
Powder Clinic: Is Blasting Enough for Preparation?
Q. I am looking into making the switch from liquid to powder coating. I have an experienced powder coater who says all my aluminum and steel parts need is to be blasted, and that should be good enough. But I am finding mixed reviews online. So is th...
Ask an Expert Published: 8/23/2016
Powder Clinic: Adhesion of Powder to Brass
Q. I’ve heard from a few vendors that brass presents challenges with adhesion, whereas steel and aluminum do not. What is the reason for this?
Ask an Expert Published: 8/1/2016

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