Summary for spray paint grounding Discussion
Earthing/grounding of parts during paint application is raised by Bela MS, who asks whether aluminium aerospace parts with Cr3+ chem film need to be grounded when spraying both conductive and non-conductive paints, or only conductive paint. The concern is whether grounding is necessary for finish quality or mainly to avoid unnecessary risk. In the excerpt provided, no answer text is shown, so there is no named expert guidance to summarize and no stated consensus or disagreement. The practical issue remains the same: the question is about safe and proper spray-paint grounding practice for coated aluminium parts, especially when the visual result appears unchanged. Because the thread excerpt contains only the question, the page’s answer cannot be determined from the supplied text alone.
Q. Dear Community,
We apply both conductive and non-conductive paints usually on part made of aluminium with chem film (Cr3+) on them for aerospace industry.
I have question regarding earthing/grounding of parts to be painted. Do we need to earth the spray gun and the part during both non-conductive and conductive paints application? Or is it compulsory only in the case of spraying conductive paint?
[Telling the truth, I did not find any differences so far in the visual aspect of the paints applied, but I do not want to take unnecessary risk].
Many thanks,
Bela MS
– Harsany BAZ [Hungary]
February 24, 2022