Electroplating, also known as electrochemical deposition or electrodeposition, is a process for producing a metal coating on a solid substrate through the reduction of cations of that metal by means of a direct electric current. The part to be coated acts as the cathode (negative electrode) of an electrolytic cell; the electrolyte is a solution of a salt of the metal to be coated; and the anode (positive electrode) is usually either a block of that metal, or of some inert conductive material. The current is provided by an external power supply.

Electroplated plastic: The purpose is to coat the plastic surface with metal, not only to increase the aesthetic, and to compensate for the shortcomings of plastic (especially anti-aging, increase mechanical strength), to give the nature of metal, give full play to the characteristics of plastic and metal in one.  

Electroplated metal: The process of using electrolysis to form a uniform, dense, well-bon

Physical vapor deposition (PVD), sometimes called physical vapor transport (PVT), describes a variety of vacuum deposition methods which can be used to produce thin films and coatings on substrates including metals, ceramics, glass, and polymers. PVD is characterized by a process in which the material transitions from a condensed phase to a vapor phase and then back to a thin film condensed phase. 

Vacuum deposition is mainly divided into vacuum evaporation, sputtering and ion deposition.

PVD is an environmentally friendly surface treatment method that can truly obtain nanoscale coatings without pollution, and it is capable of preparing a variety of single-metal films (e.g. Aluminum, Titanium, Zirconium, Trivalent Chromium, etc.), Nitride films (TiN, ZrN, CrN, TiAlN), and Carbonitrides films (TiC, TiCN), as well as Oxide films (e.g. TiO, etc.).

Spray Painting refers to the use of a special spray gun as a tool, compressed air for the delivery of paint airflow, the paint from the nozzle of the spray gun into a uniform atomized liquid, evenly dispersed on the surface of the object deposited.

Spray Painting methods currently in use are manual spraying and automatic spraying.

Spray gun is divided into electrostatic gun and non-electrostatic gun. Among them, the electrostatic gun spray paint is the use of "electrostatic ring pack" physical phenomenon of a spraying method, with high-voltage electrostatic gun electrode needle and grounded objects between the existence of an electrostatic field, paint sprayed by the electrostatic gun, the paint takes on an electrostatic charge while being atomized, this charged paint will reach the grounded object (which itself must also be conductible) in greater proportion under the force of the electrostatic field without being deflected away from the target object or carried away by air currents.