How to distinguish between silver contacts and copper contacts?

How to distinguish between silver contacts and copper contacts?

Since there are too many factories making silver contacts, it is hard to guarantee that some unscrupulous businessmen will use cheap copper contacts to replace silver contacts to seek more profits. When purchasing, ordinary laymen do not know the difference between silver contacts and copper contacts. Including various special-shaped composite contact strips (also known as "special-shaped composite contact strips"), micro-shaped composite contact strips (also known as "micro-shaped composite contact strips"), new welding contacts, stamped welding silver contacts, inlay composite strips, surface composite strips, top composite strips, side composite strips, stamped assemblies, and other products.

The technicians told us that copper and brass can be identified by the naked eye. In addition, copper is relatively soft, while brass is relatively hard. The same is true for silver alloy and silver. Alloy silver is much harder while pure silver is softer, but the colors are not particularly distinguishable. In addition, circuit contacts that are generally subject to sparking will use silver contacts, the inside is copper, and the outside is plated with a very thin layer of silver. The reason for this is that silver will form an oxide layer like other metals after the contact is sparked, and silver oxide has better conductivity than pure silver. Therefore, when the contacts cannot avoid sparking, silver contacts or silver alloy contacts are used.

Silver contact products use thickened power cords and international standard product sizes. Through repeated tests, while taking into account safety and beauty, the reasonable size of the product makes it dissipate heat faster and prolongs the service life of the socket. The plug is ergonomically designed, and the silver contacts make the product more convenient to use. At the same time, the product has added a lightning protection function, silver contacts are safer to use electricity, and built-in electromagnetic anti-interference filtering plays a power purification function to protect electrical equipment. The silver contacts designed and produced by our company have the characteristics of high dimensional precision, high bonding strength, easy control of contact hardness, and good conductivity.