A. Electrophoresis
It is used in stainless steel, aluminum alloy, etc., which can make the product appear in various colors and maintain metallic luster. At the same time, it enhances surface performance and has good anti-corrosion performance.
Process flow: pretreatment → electrophoresis → drying
Advantages:
1. Rich in color;
2. No metal texture, can be matched with sandblasting, polishing, drawing, etc.;
3. Processing in a liquid environment can realize surface treatment of complex structures;
4. The process is mature and can be mass-produced.
Disadvantages: The ability to cover up defects is average, and die castings require high pretreatment for electrophoresis.
B. Electroplating
It is a technology that uses electrolysis to attach a layer of metal film to the surface of the metal to prevent corrosion, improve wear resistance, conductivity, reflectivity and improve aesthetics.
Process flow: pretreatment → cyanide-free copper → cyanide-free white copper tin → chromium plating
Advantages:
1. High gloss of coating and high-quality metal appearance;
2. The substrate is SUS, Al, Zn, Mg, etc.; the cost is lower than that of PVD.
