electrifying engine block while painting?

[IDIoit]

had one of my "whyotech" friends here today.
he kept telling me to charge the block with 12V before i paint....

has anyone heard of this?

thought maybe it would arc on the bearings .. would not be good.

i thought to myself that hes full of

but cant hurt to get your guys opinion...

 

[83ford]

I don't understand what that would do but ive always thought of takin one of them propane jet heaters and heating it up so it wouldn't be cold when you painted it


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[79jasper]

Maybe thinking it'll help it stick or something. ::

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[cpdenton]

Full of

If you have a negatively charged gun, and a positively charged surface, like in powdercoating, but nothing for regular painting.

They don't electrify the fender when they paint it......

 

[riotwarrior]

Test theory report back

But u go ahead test it....lick the two wires first make sure got current too

Damn....this new AVATAR has me lookin twice too now...hmmm...

 

[bbjordan]

One of my first jobs many years ago was working on a production line making steel desks. I worked on the paint line. They charged the line. More paint hitting the metal, and more even coverage. I have no idea what voltage they used. They also used a phosphate primer.

 

[laserjock]

Interesting. You can electrically charge liquid droplets too. I would think if the gun isn't charged, charging the part would make no difference. Interesting idea. I'm sure it would make it more efficient. My question is what do you ground to if the counter electrode isn't the gun? Hooking both leads to the block is a dead short. Just going to burn the cables/wires up.

So I'm going to go out on a limb and say without the right equipment, you are creating a fire hazard and probably nothing else.

 

[Hydro-idi]

Just spray paint engine and be done with it. Last time I checked, that step was not in the application directions on the back of can.

 

[icanfixall]

Wear rubber boots or stand on a rubber map.

 

[OLDBULL8]

In the Automotive industry all the painting is done by Hi voltage electromagnetic charge. It's like static electricity. Very little overspray as the paint is drawn to the part, It was installed at LEP in the engine assembly line paint booths, way back in the late 60's or early 70's. I don't remember whether the guns were Positive or Negative charge.


Forget about doing it Brian, you won't have the right equipment anyhow.

 

[jaluhn83]

I think you need a pretty high voltage - 10kv maybe? You also need to set it up so that the paint drops are charged as they leave the sprayer. Just hooking a 12v battery up isn't going to do anything for the paint.

 

[needlenose]

It would only arc through the bearings if it was the only path available to ground. If you have the block grounded, there won't be any current flowing through the bearings unless you put the positive directly to the crank. In which case the bearing surfaces are the only path.

 

[laserjock]

Yes. If you were to do this you want a bias between the paint (gun) and the part. Should be any real current flow. The only thing carrying charge from one place to the other would be the paint. I have no idea on the voltage required, but the field strength is proportional to the voltage so more voltage is more attraction.

 

[crash-harris]

The frames at KW don't get charged when painting. Can't say the same for the cab/sleepers/hoods though. I don't get to go to the nice part of the plant

 

[FarmerFrank]

Is he a Pa whyotech grad??