Humidity, a physical quantity indicating the degree of dryness of the atmosphere. The less water vapor is contained in a certain volume of air at a certain temperature, the more dry the air; the more water vapor, the more humid the air. The degree of dryness and humidity of the air is called "humidity". It is well known that dry winters are more prone to static electricity than summers with high humidity. The effects of humidity on electrostatic hazards are as follows:
1. When the humidity is high, the moisture adsorbed on the surface of the material increases, and as a result, the conductivity of the surface of the material increases. In addition, depending on the nature of the material, internal moisture absorption also occurs, which increases the overall electrical conductivity of the material. Therefore, early static countermeasures were humidity management.
2. According to recent research, the charge on the surface of the charged body is not only discharged through the surface and the body, but also discharged to the air. Experiments have shown that in a high-humidity environment, when the charge density on the surface of the charged body is high, the charge is rapidly released into the air. But when the charged energy is very low, this phenomenon is not obvious.
Static electricity has a certain degree of harm to the human body. When the electrostatic voltage reaches 2000 volts, the finger feels; when it exceeds 3000 volts, there is a spark, and the finger has a needle-like pain; when it exceeds 7000 volts, people have a shock. In daily life, the static voltage generated can sometimes be as high as tens of thousands of volts, but since the frictional electrification time is extremely short, the amount of current generated is also small, so that it is generally not life-threatening to the human body. However, on medical operating tables, static sparks can cause an explosion of anesthetic agents, which can harm medical personnel and patients and must be noted. In addition, a large amount of dust adsorbed by static electricity contains a variety of viruses, bacteria and harmful substances, which are harmful to human health. Serious electrostatic phenomena can cause skin irritation and inflammation, and can also make people feel upset, dizzy, chest tightness, nasopharyngeal Discomfort can even cause bronchitis, asthma and arrhythmia, so it is necessary to wear anti-static clothing and anti-static boots during work.