We know the advantages and disadvantages of static electricity, friction can generate electricity. The positive and negative charges after friction are bound to the charged body. It cannot move directionally like charges in wires, so it is called electrostatic charge, abbreviated as static electricity.

There are many hazards of static electricity, and its first hazard comes from the interaction of charged bodies. Friction between the aircraft body and particles such as air, water vapor, and dust can cause the aircraft to become electrified. If no measures are taken, it will seriously interfere with the normal operation of the aircraft's radio equipment, making the aircraft deaf and blind; In a printing factory, static electricity between paper sheets can cause them to stick together, making it difficult to separate and causing trouble for printing; In the pharmaceutical factory. Due to the attraction of dust by static electricity, drugs may not meet the standard purity; When playing television, static electricity on the screen surface can easily adsorb dust and oil, forming a thin film of dust that reduces the clarity and brightness of the image; The dust that is common and difficult to remove on blended clothes is also the result of static electricity.

The second major hazard of static electricity is the possibility of explosion caused by sparks igniting certain flammable objects. On pitch black nights, when we take off nylon and woolen clothes, sparks and "popping" sounds are emitted, which are basically harmless to the human body. But on the operating table, electric sparks can cause the explosion of anesthetics, injuring doctors and patients; In coal mines, it can cause gas explosions, resulting in worker deaths and injuries, and render the mine useless.

In short, static electricity hazards arise from the use of electricity and electrostatic sparks, with the most serious form of static electricity hazards being the ignition and explosion of combustible materials caused by electrostatic discharge.

The measures to prevent static electricity generation are generally to reduce the flow rate and flux, modify the electrification process, and use equipment and materials with less electrification. The simplest and most reliable way is to ground the equipment with wires, which can lead the charge to the ground and avoid static electricity accumulation. Observant passengers may notice; Discharge brushes are installed on both wing tips and the tail of the aircraft. When the aircraft lands, special grounding tires or grounding wires are mostly used on the landing gear to prevent passengers from being electrocuted when descending; To release the static charge generated by the aircraft in the air. We often see an iron chain attached to the rear of an oil tanker truck, which is the grounding wire of the vehicle. Properly increasing the humidity of the work environment to allow charges to be released at any time can also effectively eliminate static electricity. It's not easy to conduct static electricity tests in humid weather.