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Function of Automotive Paint Coatings

Oct 20, 2022

Function of Automotive Paint Coatings


As the outer coat of automobiles, automobile paint coatings mainly have the following functions:

1. Protection

In terms of the main body, 90% of the cars are made of steel. Without the protection of paint coating, the life of the car will be greatly reduced. The coating can protect the car from corrosion. With the new materials coming into the market, the role of film protection is growing, such as scratch resistance, elasticity, pollution resistance, etc.

2. Decorative function

The car surface is painted with various colorful paints, which looks beautiful, generous, bright and comfortable, gives people a beautiful feeling, and also shows the personality of the car. The plump paint film can also improve the quality of the car.

3. Identification function


The color of car paint can indicate the type and function of the car, such as green for postal vehicles, white for ambulances, red for fire engines, etc.



If the application of automobile products is taken as an example, the automobile paint surface is usually divided into three layers, and different layers of paint also play their respective roles.


1. Primer

Primer is the third and deepest layer of automobile paint. The role of this paint is to protect the automobile and prevent the metal plate from rusting. The color of this kind of paint is relatively simple, usually black, white and gray. However, because the paint surface cannot be seen from the appearance, the color of the primer is not important. As long as the anti rust ability is strong, it is a good primer.


2. Color paint layer

The color paint layer is the core paint surface that determines the appearance of the car. It is attached to the midcoat to further strengthen the anti-corrosion protection of the body and display the color. The colors we see are displayed by the color paint layer; Therefore, the paint is colorful and varies according to the needs of different automobile manufacturers. Because the role of this paint is more critical, it is also divided into different products, such as ordinary colored paint, metallic paint, silver paint, pearl paint, etc.


3. Varnish layer


The varnish layer is attached to the colored paint layer, and the paint spraying is continued on the colored paint to further strengthen the anti-corrosion protection of the vehicle body and protect the colored paint layer from minor scratches, so as to make the color more transparent and slow down the fading phenomenon. In addition to its protective effect, the paint can also make the car look more beautiful.


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