Thursday, October 8, 2015

What is Faraday Cage? (Part 1)

Have you ever powder coated parts with inside corners or complex geometries?  If so, it is likely that you have struggled with the Faraday cage effect. For those of you who have not, the Faraday cage is like an invisible electrical shield that prevents charged powder particles from reaching internal corners and recesses. If the powder particles cannot reach these areas, then the part will not be completely coated, which will result in poor coating performance and most likely premature corrosion.

Contributing Factors to Faraday Cage
  • Edges build quickly and can back-ionize before recesses can coat
  • Corona charging creates strong electric fields
  • Edges offer the least amount of resistance
  • Electric fields follow the paths of least resistance
  • Charged particles follow with lines of force
  • The less the distance the more the attraction

Look for Faraday Cage (part 2) next on - Overcoming the Faraday Cage Effect

For more information on the Faraday cage effect, read TCI's Troubleshooting Guide.

Or contact us today to speak with one of our professional service technicians. We can help you with Faraday Cage questions or any of your powder coating needs.

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