What is electrostatic paint?

We have said many times in previous articles that one of the best colors used for painting building doors is electrostatic paint. These colors are of great quality and have many uses in the construction industry.

But do you know what electrostatic paint is? What are its features and why has it become so popular?

In this article from Rasta Choob, we would like to fully introduce electrostatic paint and say that it has advantages and why it is better to go for doors that use this paint. If this topic interests you and you want to get more information about electrostatic paints, stay with us.

History of electrostatic paint

Before introducing electrostatic colors, we want to talk about the history of these colors. It was in the early 50 decade that such colors were introduced to the American market. But a German institute developed it in the early 60 decade. The institute used an extruder with heat to continuously produce powder paint paste.

A few years later, the UK Shell Company used this electrostatic method for painting. In fact, this is why these colors were also known as powder colors. Although electrostatic paints were of very high quality, in those early years, many countries in Europe and America did not welcome it because it was more expensive compared to other paints in the market.

A complete introduction to electrostatic paint

Now that we know the history of this color, we need to know how it is produced. These types of colors are industrial colors that are made in two types of powder colors and furnace liquid colors.

The most common use of these colors is covering metal surfaces. One of the main reasons for the popularity of electrostatic paints among engineers is that they are the best industrial paints and do not harm the environment. Natural dyes may cause various diseases in workers after some time. But these electrostatic colors will not cause any damage.

These colors are used for different industries and used to paint different surfaces. Now the question is, which type of electrostatic paint is more suitable?

In answer to this question, we must say that the desired color will be chosen according to the relevant industry. For example, it is better to use electrostatic powder paints for painting metal surfaces.

See: Wood CNC machine and all kinds of doors with CNC design

Advantages of electrostatic paint

Like any other product, electrostatic paints, whether they are powder or liquid, have advantages and disadvantages, and we will discuss some of the most important ones below:

Electrostatic paint coating is excellent
It is simple and easy to work with
The layer they cover on different surfaces is very thin
They have good coverage.
They control the oven temperature.

Disadvantages of electrostatic paint

Unfortunately, the main disadvantage of electrostatic paints is that they are expensive. Because the cost of its equipment is high.
This color must be made in the workshop and is not portable
The size of the piece to be painted is small due to the capacity of the equipment.

spray paint

Types of electrostatic painting methods

In general, electrostatic painting has certain types. In fact, this method of coloring is done with different techniques, which we have mentioned below:

Preheat method

In this method, as the name suggests, the desired piece must be heated before painting. After the desired piece receives enough heat, then they spray paint on it. This method of coloring has special features. For example, when the pre-heat method is used for electrostatic painting, the adhesion of the paint to the desired surface becomes very high. In this way, its resistance increases and it cannot be easily scratched. Usually, this method is used to paint small parts that have a lot of complexity or parts that must have a high quality guarantee.

Post heat method

There is another type of electrostatic painting, during which the piece is first painted and then heated. Due to the simplicity of this method, it is very common in Iran. The post-heat method is easier to teach to different people and is cheaper than other electrostatic painting methods. It is usually done faster. Of course, this issue depends on whether you use the manual or automatic method for coloring.

It should be noted that in both methods, the final quality of the paint will be very high. Since this method is very popular in our country, it is better to explain more about it.

How is electrostatic painting done by post-heat method?

In this method, we must first place the desired piece in a container and then connect it to the ground with an earth cable. Then, the powder should be placed in special spray guns to be electrically charged. When we want to spray the paint, the air pressure must be carefully controlled. It should also be ensured that the thickness of the colored surface is not more or less than the desired level. If the thickness of the paint layer increases, it may affect the insulation of its lower surface.

How do they prepare the desired piece?

When we want to paint a piece by post-heat, electrostatic painting, we must degrease it alkaline before anything else. In this way, we will make sure that the part in question is clean.

Then we wash it once more and create a layer of phosphate on it. Then we go to coloring and finally put it in the heat ovens.

Maybe you have a question about how the process of alkaline degreasing is done. In response, we must say that first they place the desired piece in a special tub full of alkaline acids. Then it is heated to 60 temperature. Allow the piece to soak for 3 minutes to remove all dirt and grease from it.

For washing after this step, lukewarm water should be used. This water is sprayed on the part to wash all the alkaline substances from it. Phosphate materials are also applied to the piece in the form of spray or immersion.

For painting, they use special guns that spray the paint on the piece and then put it in the oven.

Another important point that must be taken into account during the electrostatic painting process is the temperature of the coating. Furnaces should be heated to 160 to 200 degrees Celsius. The duration of placement in the oven is between 10 to 25 minutes. If the piece in question has been left in the oven for a shorter period of time, the mechanical and chemical resistance of the paint will probably be lower. They also look ugly.

If they raise the temperature of the oven or keep the piece in the oven for more than 25 minutes, the corresponding colors will become opaque and the powder coating will change color.

Spray torch method

There is another type of painting method that uses a spray gun to direct the paint powder to the piece and at the same time also holds a flame on it and kind of cooks the paint.

This method is usually called as the most traditional method of electrostatic painting and is used in places that do not have many facilities. In this method, no furnace or electricity is used because the compressor works with gasoline.

We must point out that painting with the spray torch method will not be of great quality in the end and it may get scratched after a while. Also, coloring with this method has a very low speed.

Another feature of electrostatic painting by torch spray method is that if a part of the surface color is removed, the entire color layer will also be removed in one piece.

This method is usually used for painting simple and very large pieces.

Infrared method

This method uses a special technology. At first, the paint is sprayed by a robot or gun. After that, the painted part is placed under an infrared lamp to harden.

Usually, this method is used when the desired piece is so big that it cannot pass through the entrance of the baking ovens. In this way, the infrared method can be used. Also, sometimes the part in question may be flammable and cannot be put into the furnace. As a result, the best solution is to use the infrared method. This method of painting does not require a very large space. However, the speed of doing the work is also low. For this reason, it is better to go for colors that have a short cooking time so that the whole process is economical.

Some important points about powder paint and electrostatic painting

Any piece or device that is a conductor of electric current or that can be placed inside the oven can be used by the electrostatic painting method.

When you paint one part and want to paint another part, but the color of these two parts is different, you must clean all the painting equipment and the environment so that you don't have any color mixing.

In electrostatic painting methods, there are two types of paint spraying methods. In the Tribo method, the paint powder particles inside the spray gun make contact with its surface and become electrically charged. In the corona method, an external agent is used to impregnate the color powder particles. Each of these methods has its own advantages and will be effective in the final result.

conclusion

In general, electrostatic paints are very useful for painting building doors because they increase their resistance. It is difficult to separate these colors from the surface of the door. In addition, they give a very beautiful appearance to the desired door, but they are also able to increase the resistance and insulation of the door.

Most quality anti-theft doors use this type of painting to increase the life of the door.

If decided to Buying construction doors Yes, our recommendation is to go for doors that have used different methods of electrostatic painting. These doors will work for you longer and have a longer lifespan.

Finally, we must say that you can find the best construction doors on the website Rasta Choob find This store has a wide variety of different doors with different colors. So you can make your purchase from this website with peace of mind and your order will reach you as soon as possible. Rasta Choob experts are ready to guide you.