Which is more corrosion resistant, plating or powder coating?
Author:Robby
Electroplating is a process of depositing a metal layer on the surface of a conductor using electrochemical principles, by connecting a power supply to an electrolyte containing metal ions, and under the action of an electric field after energization, the metal ions precipitate to form a metal layer on the surface of the conductor. This process not only enhances the corrosion resistance of the metal, but also increases the hardness, prevents abrasion, improves electrical conductivity and surface aesthetics. In the electroplating process, the plated metal or other insoluble material is used as the anode and the workpiece to be plated is used as the cathode, and a metal layer is formed on the surface of the workpiece through electrochemical reaction, thus providing protection.
In contrast, although powder spraying (powder electrostatic spraying) has the advantages of high paint utilization, one-time film thickness, small pollution, etc., its corrosion resistance and decorative properties are inferior to those of electrophoresis and baking paint, and the coating smoothness is slightly poor, and the luster is not very high. Powder spraying process is through the spray gun will be powder coating sprayed on the workpiece, after the heat so that the powder melting, leveling, curing, in the surface of the workpiece to form a hard coating film. Although this coating film has a certain protective effect, it is inferior to the electroplating layer in terms of corrosion resistance.
In summary, although powder coating has its advantages in some aspects, electroplating performs better in terms of corrosion resistance.