explain how static electricity help in the spray painting of cars
Answers
The paint particles are positively charged by the spray gun which causes them to spread out because they are repelled by holding the same charge.
The car's surface is negatively charge which attracts the paint particles resulting in less wastage and a more even coat.
The paint applied by these types of sprayers can be both liquid or powder, and it is electrostatically charged in a couple of different ways. One type of system applies a negative electric charge to the paint while it is in the reservoir. Other systems apply the charge in the barrel of the spray painter gun. The paint is then propelled through the gun, rubbing against the side, and gaining a static electric charge as it moves. Since the paint particles all have the same charge, they repel each other. This helps to distribute the paint particles evenly and get uniform coverage. Usually the object being painted is metal and grounded, but almost any product can be finished electrostatically. A metal object may need to be placed behind the object to create a ground or the object can be sprayed with a conductive primer. The paint particles have a charge so they are attracted to the opposite charge of the object being painted. This makes the particles less likely to stay in the air.
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