How Much Do You Know About Electroplating？

Electroplating is the process of using the principle of electrolysis to coat a thin layer of other metals or alloys on the surface of certain metals. Improve wear resistance, electrical conductivity, reflectivity, corrosion resistance (copper sulfate, etc.) and enhance aesthetics.The outer layers of many coins are also electroplated.Now Longwang machining a lot metal parts for many industries require plating,such as CNC Keyborad and some cameram parts.

According to the classification can be divided into:

       ① Protective coating: Coatings such as Zn, Ni, Cd, Sn and Cd-Sn are used as anti-corrosion coatings for atmospheric and various corrosive                         environments;

       ②Protection/Decorative coating: Such as Cu-Ni-Cr, Ni-Fe-Cr composite coating, etc., both decorative and protective;

       ③ Decorative coating: such as Au, Ag and Cu. Sun imitation gold coating, black chrome, black nickel coating, etc.;

       ④Reparative coating: For example, electroplating Ni, Cr, Fe layer to repair some high-cost wear parts or processing out-of-tolerance parts;

       ⑤Functional coatings: conductive coatings such as Ag and Au; magnetic conductive coatings such as Ni-Fe, Fe-Co, Ni-Co; high temperature anti-            oxidation coatings such as Cr and Pt-Ru; reflective coatings such as Ag and Cr; black chrome, Anti-reflective coatings such as black nickel; hard              chrome, Ni. SiC and other wear-resistant coatings; Ni. VIEE, Ni. C (graphite) anti-friction coating, etc.; Pb, Cu, Sn, Ag and other                                          weldable coatings;  anti-carburizing Cu coating, etc.

In addition, there are different functions according to various electroplating needs. An example is as follows:

1. Copper plating: used as a primer to improve the adhesion and corrosion resistance of the electroplating layer. (Copper is easy to oxidize. After oxidation, the patina is no longer conductive, so copper-plated products must be protected by copper)

2. Nickel plating: used as a primer or as an appearance to improve corrosion resistance and wear resistance (among which chemical nickel is the modern process with more wear resistance than chrome plating). (Note that many electronic products, such as DIN head and N head, no longer use nickel as the base, mainly because nickel is magnetic, which will affect the passive intermodulation in the electrical performance)

3. Gold plating: Improve conductive contact resistance and enhance signal transmission. (Gold is the most stable and most expensive.)

4. Palladium-nickel plating: Improves conductive contact resistance, improves signal transmission, and has higher wear resistance than gold.

5. Tin and lead plating: improve the welding ability, and will be replaced by other substitutes soon (because most of the lead is now plated with bright tin and matte tin).

6. Silver plating: Improve conductive contact resistance and enhance signal transmission. (Silver has the best performance, easy to oxidize, and also conducts electricity after oxidation).

Dongguan Longwang Hardware Co.,Ltd supply one-stop machining service from raw material machining to surface treatment.Longwang also own assembly line can meet your assembly requirement.

       We also have hot-selling Pump Parts, which are made of selected high-quality materials to ensure that the finished products are of high quality, with small error and high precision.