Quality Control

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Published: 6/1/2017

What is Back-Ionization?
Q. We spray parts using a silver metallic powder by hand. The surface has a lot of texture and small stars in certain areas and our powder supplier says it is “back-ionization.” What is back-ionization and how do we overcome the problem?

Published: 6/1/2017

The Value of New Application Equipment
Q. We have an old set of automatic spray guns. The controllers are an analog design with none of the more modern features we see at shows and online. How can we save money on gun operation and how do we evaluate the savings?

Published: 5/1/2017

How to Determine the Cause of Adhesion Failure
Q. We recently powder coated an aluminum structure prepped with a medium grit aluminum oxide media. After a few weeks in a warehouse, a small area was discovered where the coating had chipped to bare metal along a weld seam. What caused the adhesion...

Published: 4/1/2017

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?

Published: 3/1/2017

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?

Published: 2/1/2017

How to Boost a Gradually Less-Efficient System
Q. We've powder coated automotive parts with a single-color, black epoxy for around a year. How can we regain our initial efficiency?

Published: 2/1/2017

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?

Published: 2/1/2017

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.

Published: 1/1/2017

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...

Published: 1/1/2017

Corrosion-Sensitive Environment
Q. I have some fencing around my swimming pool that has corroded badly over the years. It was made with steel and there is a lot of visible rust on the rails and vertical pickets. I am considering the options; have a professional painter come in and...