Electrostatic Spray Tribo Charging the second most common method

Electrostatic Spray Tribo Charging is the second most common method of spraying a powder coating. This method relies on the powder to develop a charge while passing through special hoses and guns. As powder contacts these non-conductive surfaces,electrons are stripped off of the particles due to friction. These particles then develop a powerful positive charge. No high voltage or lines of force are used which allows for easier penetration into deep recesses. Tribo charging is efficient in developing a static charge within the powder,however,coatings must be specifically formulated for this system.

Advantages:

  • No high voltage required;
  • Better penetration into recessed areas;
  • Slightly lower capital costs

Disadvantages:

  • level of charge varies with powder chemistry and formula
  • Slower rate of application;
  • Transfer efficiency is lower than corona charging system;
  • Required more guns;
  • Wears out parts faster.

 

Electrostatic Spray Tribo Charging
Electrostatic Spray Tribo Charging

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