Tungsten wire may indeed lose some of its performance in a humid environment. The following is a detailed explanation of this phenomenon:
- Chemical properties of tungsten wire
Tungsten wire is inert to dry air at room temperature and has high chemical stability. However, in humid air, tungsten wire will gradually be oxidized. When the temperature rises to 400℃, tungsten wire will quickly react chemically with oxygen to form an oxide film. Although this oxide film can protect the inner metal in some cases, more often it will lead to a decrease in the performance of tungsten wire, such as reduced electrical conductivity, thermal conductivity and mechanical strength.
- The impact of humid environment on tungsten wire
Oxidation corrosion: Water vapor and oxygen in a humid environment will accelerate the oxidation corrosion process of tungsten wire, resulting in the formation of an oxide layer on the surface of the tungsten wire, thus affecting its performance.
Decreased conductivity: The formation of an oxide layer will increase the resistance of the tungsten wire surface, resulting in a decrease in conductivity.
Decreased thermal conductivity: The oxide layer may also affect the thermal conductivity of the tungsten wire, making its heat dissipation effect worse at high temperatures.
Weakened mechanical strength: Tungsten wire exposed to a humid environment for a long time may have its internal metal structure corroded and damaged, resulting in weakened mechanical strength.
- Precautions in application
Environmental selection: When using tungsten wire in a humid environment, bulbs or equipment with moisture-proof and waterproof functions should be selected as much as possible to reduce the impact of water vapor on the tungsten wire.
Regular inspection: For tungsten wire equipment used in a humid environment, regular inspection and maintenance should be carried out to promptly detect and deal with potential oxidation problems.
Alternative materials: In extremely humid or corrosive environments, other more corrosion-resistant materials can be considered to replace tungsten wire.
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