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Humidity can have both direct and indirect
effects on the durability of stainless - steel pneumatic actuators. Here's how:
Direct corrosion: Although stainless steel
is highly corrosion - resistant, high humidity levels can still pose a threat.
In the presence of moisture, especially when the humidity exceeds 60% - 70%, a
thin film of water can form on the surface of the actuator. If the environment
also contains corrosive substances such as chlorine, sulfur dioxide, or salts,
these can dissolve in the water film and react with the stainless steel,
leading to the formation of rust and pits over time. This corrosion can weaken
the structure of the actuator and affect its performance.
Impact on seals: High humidity can cause
the seals in the pneumatic actuator, which are often made of rubber or other
elastomeric materials, to swell or degrade. Excessive moisture can accelerate
the aging process of the seals, reducing their elasticity and sealing
performance. As a result, air leaks may occur, which not only reduces the
efficiency of the actuator but also puts additional stress on other components.
Formation of condensate: In cold
environments, when humid air comes into contact with the relatively cold
surface of the pneumatic actuator, condensation can occur. The accumulated
condensate can lead to waterlogging inside the actuator, affecting the movement
of parts and potentially causing damage to the internal mechanisms. Moreover,
the presence of water can promote the growth of mold and bacteria, which can
further contaminate the actuator and affect its operation.
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