What factors affect the antioxidant properties of Tungsten Bimetal Contact Point?

Tungsten Bimetal Contact Point is widely used in electrical equipment due to its excellent electrical performance and high temperature resistance. The oxidation resistance of the contact point is a key factor to ensure its long-term stability. The oxidation resistance is affected by many factors. These factors and their impact on the performance of the tungsten bimetal contact point will be discussed in detail below.

1. Selection and combination of materials
Tungsten itself has good oxidation resistance, but its oxidation resistance is also affected by other metal materials it is compounded with. Usually, tungsten is compounded with metals such as silver, copper or nickel. The oxidation properties of these metals are different, which directly affects the overall anti-oxidation ability of the contact point. For example, silver is easily oxidized in a high-temperature environment, and copper will form an insulating layer after oxidation, affecting the flow of current. Therefore, when selecting composite metals, their oxidation behavior needs to be considered to ensure the oxidation resistance of the overall material.

2. Manufacturing process
The manufacturing process of tungsten bimetal contacts has a significant impact on their oxidation resistance. When using high-temperature sintering or hot pressing processes, the bonding strength and density of the material will affect its oxidation resistance. Higher bonding strength and tighter microstructure reduce oxygen penetration, thereby improving oxidation resistance. In addition, surface treatment processes (such as silver plating, nickel plating or spray coating) can also provide an additional layer of protection for the contact points and enhance their ability to resist oxidation.

3. Environmental conditions
The oxidation resistance of Tungsten Bimetal Contact Point is also affected by the working environment conditions. In environments with high temperature, high humidity or high oxygen concentration, contact points are more likely to undergo oxidation reactions. Therefore, factors such as temperature, humidity and oxygen concentration of the use environment will directly affect the oxidation resistance of the contact point. In harsh environmental conditions, it is crucial to choose materials with stronger antioxidant properties or to design more robust structures.

4. Frequency of use and load
The frequency of use and electrical load of the contact points are also key factors that affect the oxidation resistance. In high-frequency and high-load applications, the contact points will experience frequent switching operations, which may cause the surface temperature to increase and accelerate the oxidation reaction. Therefore, appropriately reducing the frequency of use or electrical load can effectively extend the service life of the contact points and enhance their antioxidant capacity.

5. Surface cleanliness
The surface cleanliness of contact points also has an impact on their oxidation resistance. The presence of surface dirt, grease and oxides can affect the quality of the electrical contact and thus the antioxidant properties. Regular cleaning and maintenance of contact points can maintain good contact and reduce the occurrence of oxidation reactions.

6. Temperature control
Temperature is an important factor affecting the oxidation reaction rate. In high temperature environments, the oxidation reaction rate accelerates, which may lead to rapid degradation of materials. Therefore, controlling the working temperature of the contact point and preventing it from running at too high temperature for a long time is an effective measure to improve its oxidation resistance. Temperature control can be achieved by improving thermal design or using a cooling system.