Automobile paint coating plays a very important role for automobiles. It is not only a protective layer for anti-corrosion of the car body, but also can add beauty to the automobile and satisfy people's visual enjoyment.
(1) Protect the car body. The traditional car body is mainly made of steel plate. Oxygen and moisture in the air will react with the car body and cause corrosion. Paint can prevent the occurrence of rust, thereby protecting the car body.
(2) To increase aesthetics, the shape of the car body is composed of surface shapes and lines, such as planes, curved surfaces and various curves. Paint can make these surfaces and lines more three-dimensional and increase the beauty of the car body.
(3) Marking function, which uses a specific color to indicate that the car is used for a specific purpose. This function is very common in special vehicles.
(4) Improve quality, high-performance paint can not only increase the appearance of the car body, but also make the car body experience a longer service life, so the quality and value of the car will be higher.
Paint composition: Automotive paint is composed of pigments, binders, solvents and some additives. These components are found in automotive topcoats and primers, and they play different roles in the paint.
(1) Pigment, one of the two non-volatile film-forming ingredients in paint, it provides the color and durability of the paint, and can cover the underlying coating. It can also improve the surface strength and adhesion, and improve the gloss of the paint surface. The size and shape of the pigment particles are also very important. The size of the particles has an effect on the hiding ability, and the shape of the particles has an effect on the strength of the paint surface. These particles are roughly spherical, and some are rod-shaped. Rod-shaped particles can increase the strength of the paint film.
(2) Adhesive, which is another non-volatile film-forming ingredient in paint, is the main component of paint, which can make the pigment have a liquid form, durability and the ability to adhere to metal surfaces. The adhesive is generally composed of vegetable oil, natural resin (rosin, etc.) or synthetic resin (polyvinyl chloride, etc.). It determines the type of paint because it directly affects the drying mechanism. Adhesives are generally modified with reinforcing agents and catalysts, which can improve durability, adhesion, corrosion resistance, and scratch resistance.
