Introduction
The double rectifier electroplating process is a commonly used electroplating method. By using double rectifiers, the efficiency and quality of electroplating can be improved. This article will introduce the detailed process of the dual rectifier electroplating process.

Process flow

• Surface preparation Before electroplating, the surface of the parts to be plated needs to be prepared to ensure the adhesion and uniformity of the coating. First, the parts to be plated are cleaned to remove grease, dirt and oxides from the surface. Solvent cleaning, alkaline cleaning or acid cleaning methods can be used. After cleaning, the surface needs to be ground or polished to eliminate unevenness and scratches on the surface and improve the smoothness of the coating.

• Anodizing After surface preparation, the parts to be plated need to be anodized. Anodizing is to form an oxide film on the surface of the parts to be plated to improve the adhesion and anti-corrosion properties of the coating. Commonly used anode treatment methods include anodizing, anodic electrolytic oxidation, etc. During the anodic treatment process, treatment parameters such as voltage, current density, etc. need to be controlled to ensure the formation of a uniform and appropriately thick oxide film.

• Plating deposition After completing the anodizing process, the parts to be plated enter the plating tank and the coating deposition begins. In the double rectifier electroplating process, two rectifiers are used, one as an anode rectifier and one as a cathode rectifier. By adjusting the current and voltage of the rectifier, the metal ions in the plating solution are controlled to deposit on the surface of the parts to be plated, forming a metal coating. The choice of plating solution is determined based on the material and requirements of the parts to be plated. Common plating solutions include copper sulfate plating solution, sulfate nickel plating solution, etc.

• Coating post-processing After completing the coating deposition, the coating needs to be post-processed to improve the quality and appearance of the coating. Post-processing methods include washing, neutralization, blocking, etc. Washing is to remove plating solution residues and other impurities, neutralization is to neutralize residual acid and alkali substances, and sealing is to improve the corrosion resistance of the coating. During the post-processing process, the time and temperature of the treatment need to be controlled to ensure the stability and reliability of the post-processing effect.

• Inspection and packaging Inspect and package plated parts. The inspection mainly includes the measurement of the thickness, hardness, roughness and other properties of the coating to ensure that the coating meets the requirements. At the same time, it is also necessary to check the appearance of the plated parts, such as whether there are bubbles, cracks, contamination and other defects. After passing the inspection, the plated parts are packaged to prevent the coating from being damaged by the outside world and to facilitate transportation and use.

Conclusion

The double rectifier electroplating process is a commonly used electroplating method. By using double rectifiers, the efficiency and quality of electroplating can be improved. The process includes surface preparation, anodizing, coating deposition, coating post-processing, inspection and packaging. During the electroplating process, the parameters and conditions of each link need to be strictly controlled to ensure that the quality and performance of the coating meet the requirements. At the same time, you also need to pay attention to environmental protection and safe operation to avoid damage to the environment and people. The double rectifier plating process has been widely used in various industries and plays an important role in improving the appearance and performance of products.