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Hand plate post-treatment process 'electroplating'

by:Vowin Rapid Prototyping     2023-02-08
Electroplating is the process of plating a thin layer of other metals or alloys on the metal surface using the principle of electrolysis. The purpose of electroplating is to coat the substrate with a metal coating to change the surface properties or dimensions of the substrate. Electroplating can enhance the corrosion resistance of the metal ( Plating metals are mostly corrosion-resistant metals), increasing hardness, preventing wear, improving electrical conductivity, lubricity, heat resistance, and beautiful surface. Although both plastic prototypes and metal prototypes can use electroplating technology, because their characteristics are not the same, there are still differences in electroplating. Plastic prototypes have strong adsorption and can be electroplated directly on the surface of the prototype. If metal prototypes are electroplated directly, they will easily fall off. Therefore, metal prototypes need to be sprayed with a layer of primer before electroplating, so that the effect of electroplating will be very good. Well, the anti-corrosion time will be longer. In addition, there are different functions according to various electroplating requirements. Examples are 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 them, chemical nickel is modern The wear resistance in the process exceeds that of chrome plating). (Note that many electronic products, such as DIN heads and N heads, no longer use nickel as the backing, mainly because nickel is magnetic, which will affect the passive intermodulation in the electrical performance) 3. Gold plating: to improve the conductive contact resistance, Improve signal transmission. (Gold is the most stable and the most expensive.) 4. Palladium-nickel plating: Improves conductive contact resistance, improves signal transmission, and has higher wear resistance than gold. 5. Tin-lead plating: improve soldering ability, and will soon be replaced by other substitutes (because of lead content, most of them are now replaced with bright tin and matte tin). 6. Silver plating: improve the conductive contact resistance and enhance signal transmission. (Silver has the best performance, is easy to oxidize, and conducts electricity after oxidation)
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