Back Ionization is when powder layers start being
repelled from the part during application and is primarily caused when the part
has reached its saturation point, which prevents any more powder from being
deposited on the substrate.
Back ionization results in improper surface coating, which
leads to a coating that is not suitable for corrosion protection. It also causes an “orange peel” type texture
on the part, an undesirable look in most scenarios. The back ionization effect
is more typical when applying a second coat on a part, but can also happen when
applying first coats. Back ionization is also known as starring or
starburst effect.
How to avoid back ionization:
- Lower voltage settings
- Optimizing distance between the gun and coating surface
- Check the grounding.
For more information
like this, please see or download our powder coating technical guide on our website.
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