Electrostatic Painting

An Introduction to Electrostatic Painting

There are a variety of uses of electrostatics in our everyday lives. Here I will explain one of them called electrostatic painting which in brief is spray painting using electrostatics. Watch the video below to get a quick glimpse of what it is.
http://youtu.be/AW4nKAKDPjQ

The Electrostatic Science Behind it

Electrostatic painting is possible because of the law of electrostatics which states that unlike charges attract and like charges repel. This is used in electrostatic painting because what is done is the painter charges the object they want to paint with one charge and the paint with the opposite. This makes it that when the paint is sprayed out it is attracted to the object they want painted. If the painter is unable the charge the object they want to paint because it is grounded they can simply charge the paint and when the spray it because of charging by induction it will still have a similar effect. When you spray the charged paint at the object in this example the paint will be positive charged induction will occur. This means when the positive paint is sprayed the negative electrons move closer to the paint that is being sprayed at it making the side of the object you are spraying negatively charged but the overall object will still be neutral. This will make the positive paint attracted to that side because it is attracted to the negative charge.
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A Brief History of Electrostatic Painting

Electrostatic Painting w along with the equipment for it was originally developed and patented in the late 1940s. (Spray gun industry) Companies requested 1000s of pieces of furniture to be painted so electrostatic painting was developed as a more efficient way to paint. Harold Ransberg realized that if they charged the paint it would stay on the furniture and make the process faster.He also figured out that it would save paint. This is was the foundation for all electrostatic painting to come.

The Uses of Electrostatic Painting

Electrostatic painting is used to paint small areas as you saw in the video to make it so the paint will mainly go on the object that the painter intends to paint. Electrostatic painting is also commonly used in painting cars. It can truly be used in all situations that regular painting can be used and offers many advantages.

The Advantages of Electrostatic Painting

- Faster paint drying

- Less wasted paint

- More even coat of paint

- More durable because it has a strong bond to the object

- More eco-friendly because less paint particles go into the air

The Disadvantages of Electrostatic Painting

- You have to charge the objects prior to painting which can prove to be difficult for certain objects

- Material you want to spray must be conductive

- Equipment is more expensive than conventional painting equipment


Works Cited

Blake, Leesa. On Science 9. Toronto, ON: McGraw-Hill Ryerson, 2009. Print.


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