Definition of Back Ionization🧨 · Powder Coating Tips and Tricks

Definition of Back Ionization🧨

Back ionization is a phenomenon that occurs when an excessive amount of electrostatic charge builds up on the surface of a part being coated. Here’s how it happens and why it can be problematic:

Cause of Back Ionization

An electrostatic charge is applied to powder particles in powder coating, allowing them to adhere to a grounded metal part.
As powder builds up on the surface, the coating layer thickens, and an increased electrostatic field develops.
When this field becomes too strong, it can create localized high-intensity charges, which repel additional powder from adhering to the surface.

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