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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
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