The failure of silver contacts refers to the process of manufacturing electric silver contacts during the use of Composite Contacts surface resistance, which makes the function of silver contacts abnormal, which may be caused by the following factors:

1. The silver contacts are vulcanized. Since silver readily reacts chemically with sulfur, sulfides are produced. Assuming the presence of rubber bands, sulfur wrinkled paper, sulfur tape, rubber pads, rubber tires, sulfur gas, etc., this can cause blackened silver contacts. Due to the increase in ambient temperature, the vulcanization rate can be increased.

2. Dust pollution of Cold Headed Bimetal Contacts. Airborne dust will adhere to the outside of the Electrical Silver Contacts.

3. The Silver Contact Rivets are corroded by acid. Silver point contacts treated with nitric acid leaching and electroplating techniques are turned away from the outer surface of the silver alloy and the metal is exposed to air to form metal oxides. Part of the battery phenomenon: also known as microbatteries. Many fine short-circuit galvanic cells consist of a thin film of metal covered with an electrolyte solution.

4. During the use of the Contact Point, some metals are more active and prone to electrochemical corrosion. If carbon dioxide and water vapor in the air are absorbed by the surface and become an electrolyte solution, it will cause mechanical corrosion. It will affect the normal use of the device and needs attention.

5. Other pollution. For example, exhaust gas, dust, sweat, oil stains, etc. emitted by automobiles may also cause silver contacts to fail if they are exposed to carbon dioxide at high temperatures during the use of electrical switches.