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Exploring the: Quality Control Zone
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- Powder Over Electrocoat
- We powder coat wheels that come into our facility with an e-coat finish already applied. Recently, we have started getting fisheyes in every batch after we apply the powder coat over the e-coat. We have flushed airlines, performed many tests, cleani...
Ask an Expert Published: 7/19/2012
- Color Match Problems
- I am powder coating using RAL 7035 in polyester as well as in hybrid and cannot get the required shade per the shade card. What are the assignable causes?
Ask an Expert Published: 7/18/2012
- Q&A: Problems with Silicone Plugs
- We have problems with smooth powder coat finishes from what we think is plug contamination. When a silicone masking plug touches the surface of a part, it causes a powder separation similar to a large fish eye. Is this a common problem, and how do w...
Ask an Expert Published: 7/17/2012
- Powder Environmental Room
- We are building a new powder system and wonder about the benefits of enclosing the powder booths in an environmental room. It is very expensive, and the climate control system also will cost money to operate. How can we justify the expense?
Ask an Expert Published: 7/16/2012
- Powder Touchup
- Our powder booths have an automatic application area followed by two manual touch-up stations. We have ongoing problems with light coating in areas of the parts, requiring manual touch-up. Areas around welds, seams and inside corners do not get the ...
Ask an Expert Published: 6/21/2012
- Streaks in Coating
- We apply a medium-gloss gray powder on our parts at around 3 to 4 mils thickness. Sometimes our operators leave streaks on the parts when they apply the powder, and some areas are darker than others before cure and clearly visible after cure. What i...
Ask an Expert Published: 6/20/2012
- Star Bursts in the Coating
- We are using a wrinkle dark gray powder and often have a problem with “star bursts” all over the product. The stars are visible in the dry film and they do not flow out in the cure oven. We also spray a wrinkle black and get this problem occasionall...
Ask an Expert Published: 5/14/2012
- Clear Coat Over Silver Powder
- I had a commercial applicator powder coat a luggage rack for a motorcycle, applying one coat of a silver color and then a topcoat of clear powder. A few months later, the clear finish cracked. The motorcycle is garage-kept. I consulted with another ...
Ask an Expert Published: 4/10/2012
- Corrosion Resistance
- We need some reasonable corrosion protection for out parts, and our powder coating is failing in salt spray testing after nearly 300 hours. What should we change to enhance our salt spray results?
Ask an Expert Published: 2/1/2012
- Pops in the Coating
- We are having a problem with a large number of fine and very dense pinholes popping up in our powder coating as it cures.
Ask an Expert Published: 2/1/2012