What does silver plating on the product?
Silver is one of the precious metal, someone called "copper, silver and gold" three metal specifically the name, called "metal currency". As the name implies, silver price is high. Silver soft, easy to polish, good ductility, facilitate brazing, with a strong reflective ability and electrical conductivity. A relatively stable chemical properties of silver. For water and oxygen in the atmosphere are doesn‘t work. The organic acid also has good chemical stability. Due to metallic silver has the nature of these special silver plating in industry and daily life widely application. The silver in the electronics industry, instrument and meter manufacturing occupies an extremely important position. Most used in electrical components of fuses, connectors, waveguide, capacitor, shield, printed circuit board, etc. Generally the thickness of the silver coating as long as 0.1 m "can show its conductive ability. In practice, however, because of considering the friction, wear, and the protection of the coating to the substrate, often or plating 5 ~ 10 belly m thick, to ensure the reliability and stability of the machine. Application of silver in daily life is mainly take advantage of its decoration. Such as the surface of the watch is of a layer of silver plating on the brass body, after dealing with the brush light, showing a shining silver luster, give people a bright feeling. There are some senior art, Musical Instruments, jewelry, etc are silver plated tableware, and then coated with a layer of varnish to protect and increase the beautiful goods, give a person with rich feeling.
Silver coating has its weakness, however, on the dielectric medium such as printed circuit board, especially in high frequency circuit under the condition of relatively dense, silver ions are prone to "ion electromigration" form a short circuit, so demanding electronics design coated layer, should pay attention. In addition, the chemical stability of the silver is generally good, but it exposed in industrial atmosphere, easy to the role of atmospheric sulfur and chlorine, discoloring the silver coating even generate black silver sulfide product, and by a "white flour scholar" into "black-faced bao", so as a decoration, coated with protective layer should be taken into account.
