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Antique Tractor Paint and Bodywork

Charged Painting Process

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Brad From Austr

06-29-2006 02:03:09




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Hi all another stupid question. Would positively charging a spray gun and negatively charging the item being painted result in the charged paint particles being drawn into nooks and crannies resulting in a better coverage. I have a 12 volt @ 12 amp 100% duty cycle system I use for my electroylsis bath which would possibly provide enough charge. Any advice would be appreciated.
Cheers Brad




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KEB

06-29-2006 20:24:52




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 Re: Charged Painting Process in reply to Brad From Australia, 06-29-2006 02:03:09  
12 volts isn't nearly enough to cause any sort of attraction between the paint & the surface you're putting it on. Electrostatic coating systems use a very high voltage (10's of thousands of volts) and extremely low current, only enough to put a small charge on the coating particles. Its analagous to the static charge you develop shuffling on a carpet - very high voltage but almost no current.

Keith

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Brad From Australia

06-30-2006 01:15:35




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 Re: Charged Painting Process in reply to KEB, 06-29-2006 20:24:52  
Thanks for that KEB, I will have to speak with one of my electronics mates, may be able to develop something.
Cheers Brad



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Jason(ma)

06-29-2006 04:39:19




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 Re: Charged Painting Process in reply to Brad From Australia, 06-29-2006 02:03:09  
Interesting idea but wouldn't there be a danger of explosion from the flamable solvents in the paint? Anyone know how they do it with the powder coating systems?



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Brad From Australia

06-29-2006 09:42:58




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 Re: Charged Painting Process in reply to Jason(ma), 06-29-2006 04:39:19  
I believe the chance of explosion would be minimal as you would have to get the metal items close enough to ark, at those voltages youd have to be within millimetres for that to happen even then youd have to have perfect oxygen and fuel saturations for there to be an ignition.
Cheers Brad



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steve from mo - dangit!

06-29-2006 06:29:57




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 No solvent. in reply to Jason(ma), 06-29-2006 04:39:19  
I went up to a powder coating place Monday. Should have my tandem bicycle frame back all shiny in a few days.



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