Exploring the: Powder Coatings Zone
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How to Stop Outgassing with Die-Cast Parts
Q. We run aluminum extrusions using a chrome treatment conversion coating. We began running aluminum die-cast parts and are seeing small blisters and holes in the coating. How can we stop this?
Measuring and Controlling Transfer Efficiency
Q. Our automatic powder guns are nine years old and doing okay, but we want to enhance our transfer efficiency and reduce material cost. What is the right way to measure powder gun transfer efficiency and how can it be improved?
How to Get Powder into Recessed Areas
Q. We manufacture metal office furniture.We have trouble covering inside the pull area without getting roughness and heavy coating around the perimeter of the pull. How can we get the coverage inside without the orange peel?
Correcting Changes in Part Shape
Q. I frequently need to measure the thickness of anodize, paint and powder coatings on many differently shaped aluminum parts.
How to Stop Rust
Q. We make automated pay stations for parking lots, the machines that allow the customer to pay at the exit with a credit card or cash. We have had some problems with rust breaking out of the seams at the base and around the door panels that provide...
Powder Coating Clinic: Adhesion Problems on Chromated Zinc Plating
Q. We have had adhesion issues when powder coating over zinc-plated aluminum. The aluminum had been nickel-flashed and zinc-plated with a hex-free chromate to meet RoHS compliance. Do you have any suggestions as to why the powder will not adhere pro...
Powder Coating Clinic: Solving Problems with Color Variation
Q. We are noticing differences in the color of parts coming out of the oven. It seems to happen more on some days than others. It can happen with any of our brighter colors like orange and red but does not seem to happen with more neutral colors lik...
Powder Coating Clinic: Oil Seeping out of Large Welded Tubing
Q. We have a large part made out of tubing that is welded together. The tubing has a lot of oil seeping out of the welds when the part is heated and causes a defect in the cured film. We cannot get the oil out of the tubing in our washer. We tried c...
Powder Coating Clinic: Touch-up Options for Powder Coated Parts
Q. I’ve been told that a powder coated part cannot be “touched-up.” I have some patio furniture that I had powder coated and the powder coating shop that did the work for me stripped the threads in holes used to rack the part. I can fix the threads ...
Powder Coating Clinic: Powder in Layers
Q. We are in the process of designing a new powder system for aluminum extrusions and building panels. Our current system uses a six-stage dip pretreatment process and a three-layer liquid paint process (prime, color coat, clear coat) that meets AAM...