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Transcript

How it Works

The principle of electrostatics in spray paint is most commonly used for spraying cars. The paint inside is charged and the nozzle of the spray gun is given the same charge as the paint touches it. As the paint droplets hold the negative charge they leave the nozzle and create a mist. The car or other object to be painted is grounded. The charged droplets are attracted to the car and they cover the surface with the mist of paint.

References

Baker.C, Davies.L, Fazekaks.A, Fraser. D :Static electricity, Science Perspectives, "Electrostatic Paint Sprayers" Page 470

"Paint Sprayers" http://www.passmyexams.co.uk/GCSE/physics/uses-of-static-electricity.html

"What is static electricity?" http://www.sciencemadesimple.com/static.html

"Electostatic Spraying Demonstration"

Youtube, Farm and Dairy Outlook, 2009

What is Static Electricity?

Katie Walsh-Murray

Static electricity is an electrical charge that is produced by friction that causes sparks or crackling, it can also attract dust and hair.

What Causes this?

Materials are made of atoms that are electrically neutral because they have equal numbers of positive charges and negative charges. For static electricity to happen it requires a separation of positive and negative charges. When two materials are in contact, electrons may move from one material to the other, which leaves the left over positive charge on one material, and an equal negative charge on the other. When separated the materials keep this charge imbalance.

Some examples are when you rub a balloon on your head, when you pull it away your hair follows it.

Another example is when if you brush you hair with a comb and you put it over some pieces of paper, the pieces of paper will stick to the comb.

Gillian Morgan

Static Electricity in Spray Paint

Spray painting using static electricity or "Electrostatic spray painting," allows environmental friendly spray painting, while bring more effective than the average spray painting can.

But how does that use static electricity?

Static electricity and charges in both the paint and the spray gun, attract paint to the object being sprayed. Since the paint comes out in the form of mist, it gravitates and forms around the back of the object, as well as the front, leaving little residue.

Rachel McDowell- Anderson

Why Does it come out in a mist?

When the paint goes up the nozzle and out of the can, the paint then comes out in a mist form because it has a negative charge. Same charges (+ and +) aren't attracted to each other so they try to get away, spreading apart, creating mist.

Conclusion

That is how spray paint and static electricity relate and work together for efficient use. Thank you for listening to our presentation and we hope that you learned something new about spray paint today.

Contributions

Gillian Morgan- "Static Electricity in Spray Paint," "Conclusion"

Elizabeth Richardson- "How It Works"

Rachel McDowell-Anderson- "Why it comes out in a mist form"

Katie Walsh-Murray- "What is Static Electricity"

Shared Responsibility- Works Cited, Prezi Construction, Contributions slide

Static Electricity in Spray Paint

By: Gillian Morgan, Elizabeth Richardson, Rachel McDowell-Anderson, and Katie Walsh-Murray

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