PVD nano-coating is a mainstream precision coating technology in the current industrial surface treatment field. Its full name is Physical Vapor Deposition nano-coating. It forms a dense nano-scale thin film on the surface of various substrates through physical deposition processes under vacuum conditions. Different from traditional surface treatment methods such as spraying and electroplating, this technology does not rely on chemical solvent reactions. Through a series of precision procedures including high-energy physical bombardment, vapor deposition and film curing, film atoms are evenly deposited on the workpiece surface to form a protective film with uniform thickness and stable structure. The whole process is carried out in a low-temperature vacuum environment without thermal deformation or material damage to precision substrates. It is applicable to various substrates such as metals, cemented carbides and some precision plastics, meeting the surface treatment requirements of most precision parts and industrial products. As a surface modification technology at the microscopic level, PVD nano-coating features a fine and dense film structure free of pores and cracks. It fundamentally compensates for micro-defects on the surface of traditional substrates and builds a basic protective barrier for workpieces.

In terms of basic performance, PVD nano-coating has three core characteristics: high hardness, low friction and strong adhesion, which is the key reason why it can widely replace traditional surface treatment processes. The deposited nano-film has a much higher surface hardness than ordinary metal substrates. It can effectively resist damage caused by daily friction, scratching and abrasion and greatly improve the surface wear resistance of workpieces. Meanwhile, the film boasts excellent self-lubricating properties and an extremely low friction coefficient, which can effectively reduce frictional resistance during workpiece operation and cut energy consumption and surface wear of machinery. In terms of adhesion, benefited from the vacuum high-energy activation treatment process, the film achieves atomic-level bonding with the substrate with excellent conformability. Peeling, flaking and delamination will not occur during long-term service, and the film stability is far better than that of conventional coating processes. In addition, the coating has good temperature resistance and electrical insulation, suitable for ordinary alternating high and low temperature working conditions and complex industrial operating environments.

Compared with traditional surface treatment technologies, PVD nano-coating shows prominent process and environmental advantages and conforms to the current development trend of refined and green industry. Traditional electroplating and spraying processes usually suffer from uneven coating thickness, easy peeling and pollutant residues, and generate large amounts of pollutants during operation with poor environmental compliance. In contrast, the whole PVD nano-coating process takes place in sealed vacuum equipment without wastewater, waste gas or other pollutant emissions. The eco-friendly process meets the environmental standards of industrial production. Moreover, the ultra-thin nano-scale film will not change the original size, precision or appearance of workpieces, perfectly satisfying the treatment requirements of high-precision products such as precision moulds, small components and electronic accessories. With stable performance, refined process and environmental merits, PVD nano-coating has become a core technology for industrial surface protection and product quality upgrading, and is widely used in various high-end manufacturing and precision machining sectors.