PVD (Physical Vapor Deposition) technology can be divided into three categories: vacuum evaporation coating, vacuum sputtering coating and vacuum ion coating. The vacuum coating equipment corresponding to the three categories of PVD technology includes vacuum evaporation coating machine, vacuum sputtering coating machine and vacuum ion coating machine.

In recent ten years, vacuum ion plating technology has developed fastest and has become one of the most advanced surface treatment methods. We usually refer to PVD coating, which refers to vacuum ion coating; The PVD coater usually refers to the vacuum ion coater.

PVD coating is similar to traditional chemical coating, and they are all surface treatments in which one material is covered by another material in some way.

The differences between them are: PVD coating has stronger bonding force with workpiece surface, higher film hardness, better wear resistance and corrosion resistance, and more stable film performance; PVD coating can plate a wider variety of films, and the colors of various films that can be plated are more beautiful; PVD coating will not produce toxic or polluting substances.

The film deposited by PVD coating technology has the characteristics of high hardness, high wear resistance (low friction coefficient), good corrosion resistance and chemical stability. At the same time, the film can greatly improve the appearance and decorative performance of the workpiece.

At present, the film colors that can be made by the technology are deep golden yellow, light golden yellow, brown, bronze, gray, black, grayish black, colorful and so on. By controlling the related parameters in the coating process, the color of the coating can be controlled. After coating, the color value can be measured by related instruments to quantify the color, so as to determine whether the coating color meets the requirements.