Our products Trimetal Moving Contacts Features:
1-Trimetal Contacts can save costs 30%-65% than Solid Silver Contacts;
2-Very reliable mechanical strength for both sides composite materials,like Solid Contacts;
3-The silver layers on the head and foot are accurately distributed to ensure the contacts gap after riveted with stamped terminal;
4-Surface anti-oxidation protective film, can resist oxidation for a long time;
5-High dimensional accuracy ±0.01-0.02mm;
6-Strong corrosion resistance;
7-Good electrical conductivity.
The Tri Metal Contact Rivets are contacts composed of two or three materials. Generally, the head is covered with silver (silver alloy), the base is copper, and the feet are also covered with a layer of silver (silver alloy). , This process is slowly becoming popular internationally and is a good cost-saving method; the spot welding type Three Compound Contacts are also a contact composed of two or three materials. The common one is a layer of silver (silver alloy ), the middle layer is copper, and the bottom layer is iron (or iron plated with nickel or Monel alloy).
Ag/Cu/Ag Tri-metal Contact Rivets are manufactured either by bonding of multiple wire segments or by cutting and forming from a suitable tri-metal strip. When using the latter method it is also possible to use different Tri-metal Rivet Contacts materials for the contact layers if different load conditions have to be controlled.Trimetal Contact Rivets are more advanced compared to Bi-Metal Contacts. To reduce the production cost and to fight against the threat for increasing silver prices, Electrical Trimetal Rivet Contacts are solving the purpose. We have the capability to manufacture Trimetal Contact Rivets with silver alloy layer of any composition bonded with ETP Copper on both sides.
What conditions may cause the failure of Electrical Silver Contacts?
1. Silver contacts are vulcanized. Since silver is easily chemically reacted to sulfur, sulfides are produced. Assuming there are rubber bands, sulphur-containing wrinkled paper, sulphur tape, rubber pads, rubber tires, sulphur gas, etc., this may cause the silver contacts to turn black. As the ambient temperature increases, the vulcanization rate can be increased.
2. Silver Contact Rivets are polluted by dust. Air dust will adhere to the outside of the silver contacts.
3. Acid corrosion of silver contacts. The Silver Contact Point treated with nitric acid leaching and electroplating techniques turn away from the outer surface of the silver alloy, and the metal is exposed to the air to form metal oxides. Part of the battery phenomenon: also called a micro battery. Many fine short-circuit galvanic cells consist of thin metal films and are covered with electrolyte solutions.
4. During the use of Cold Headed Electrical Contacts, 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 equipment, so be careful.
5. Other pollution. For example, automobile exhaust, dust, sweat, oil stains, etc., if exposed to carbon dioxide at high temperatures during the use of electrical switches, the Silver Electrical Contact may fail.
Contact Information:
Mr.Terry Young (Sales Manager)
Apollo Electronic Components (Xiamen) Co.,Ltd
Xiamen Apollo Stamping Welding Technology Co., Ltd
Add:225#,Jinshang Road,Huli District,Xiamen City,Fujian Province,China,361009
Tel&Fax: 0592-5765084, Mob/WhatsApp/WeChat: 0086-13859903038 ,QQ: 1260358661
Email: yfd@china-electronic-components.com
Web: www.china-electronic-components.com , www.stamping-welding.com
Since 1990,professional in Silver Contact Rivet&Core&Screw Terminal for Relay&Switch&Contactor ect Stamping&Welding solutions !