Powder Stripping
We have an aluminum casting from which we need to remove powder coat. We have investigated sanding and chemical, but the heat process may have a very negative impact on the part shape. What are your thoughts?
Q. We have an aluminum casting from which we need to remove powder coat. We have investigated sanding and chemical, but the heat process may have a very negative impact on the part shape. What are your thoughts? L.M.
A. Heat stripping of organic and powder coatings is a well-established process. To minimize the potential for parts to distort, it would be important to use a relatively slow heating and cooling rate. Most suppliers of stripping ovens would be willing to perform tests with sample parts to demonstrate the capability of their process.
Various types of media blasting methods are very effective for paint stripping as well. There is a wide assortment of media available depending on the material and geometry. Plastic media blasting will make use of media that is available in a wide variety of geometries (long/angular, shorter/rounder) and various hardness in order to effectively remove the coating without damaging the substrate. Bead blasting and wet blasting techniques are also successful at powder coating removal.
Related Content
-
Improving Transfer Efficiencies in Coating Operations
There are many methods for addressing electrostatic grounding in metal painting processes, and Tim Ulshafer from Mueller Electric says the best method for your process is a simple and worthwhile exercise.
-
Curing Oven Basics
Simply heating up the substrate does not cure the coating. There are many variables to consider when choosing the best cure oven for your application...
-
Proper Testing of a Powder Coat Finish
Manufacturer shows how it performs extensive tests on powder coated medical carts.