Static shocks and how to avoid them

Many people ask about shocks experienced when they touch the door, filing cabinet, lift, or other metal object. 

Static electricity is generated whenever two materials are in contact with each other. All materials are made of electrical charges in the material atoms. In the universe there are equal amounts of negative electrical charge (electrons) and positive charge (protons). These generally try to stay in balance of equal amounts at every location. 

However, when two materials are in contact, some of the charges redistribute by moving from one material to the other. This leaves an excess of positive charge on one material, and an equal negative charge on the other. When the materials move apart, each takes it's charge with it. One material becomes charged positively, and the other negatively.  

If the materials are able to conduct electricity away the charges will dissipate and eventually recombine. In this case, static electricity effects may be too small to be noticed. However, if the charges are separated faster than the material can dissipate them, the amount of electrostatic charge builds up. Eventually a high voltage, and the effects of static electricity, may be noticed. 

If you experience static shocks while working in an area where flammable atmospheres (solvent vapours or dust clouds) might be present, seek advice immediately. There may be a fire or explosion risk. 

Read more about why static charges build up on people