Standard Test Method for Static Electrification

Importancia y uso:

4.1 Whenever two dissimilar materials are contacted and separated, excess electrostatic charge (triboelectric charge) will be found on these materials if at least one of the materials is a good insulator. This excess charge gives rise to electric fields which can exert forces on other objects. If these fields exceed the breakdown strength of the surrounding gas, a disruptive discharge (spark) can occur. The heat from this discharge can ignite explosive atmospheres, the light can fog photosensitized materials, and the current flowing in a static discharge can cause catastrophic failure of solid state devices. Electric forces can be used beneficially, as in electrostatic copying, spray painting and beneficiation of ores. They can be detrimental as when they attract dirt to a surface or when they cause sheets to stick together. Since most plastic materials in use today have very good insulating qualities, it is difficult to avoid generation of static electricity. Since it depends on many parameters, it is difficult to generate static electricity reliably and reproducibly.

Subcomité:

D09.12

Referida por:

D4649-20, D1711-24A

Volúmen:

10.02

Número ICS:

17.220.01 (Electricity. Magnetism. General aspects)

Palabras clave:

apparent contact area; charge generation; charge measurement; charging mechanism; conducting material; conductor; contact area; electric charge; electric field; electric field strength; electrometer; electrostatic charge; electrostatic charge generation; excess electrostatic charge; Faraday cage; field meter; insulating material; insulator; partial conductor; partial insulator; real contact area; resistance; surface; rotating vane field meter; surface resistance; static electrification; vibrating plate field meter;