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Tuesday, August 26, 2014

Powder Coating Application: Corona Charging Electrostatic Spray

Corona charging is the most common method used in powder application. The process disperses powder into an air stream to make a cloud of powder as it leaves the gun. The particles pass through a charged corona field at the gun tip, which applies a strong negative charge to each particle. These particles have a strong attraction to the grounded part and deposit there stick to it, then can be cured to stay on. 


  • Heavy films
  • High transfer efficiency
  • Only one oven needed because parts are sprayed cold
  • Applies quickly
  • Can be automated
  • Minimum operator training
  • Works with most chemistries


  • Requires high voltage source
  • Some difficulty with deep recesses
  • Thickness control sometimes difficult
  • Capital cost higher than other application methods

For more information about Corona charging, read TCI's Troubleshooting Guide.

For more information about other powder coating application methods, read this blog.

Intech Services and TCI Powder Coatings have partnered to create TruPak, a program that offers over 300 of TCI's most popular powder coatings in 1, 3, 5, and 10 pound boxes. Click here to buy TruPak powder coatings.

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