28-04-2018, 10:10
(28-04-2018, 09:59)barden Skrev: Det kan nu sagtens gå væk ved at sætte et koldere tændrør i.
Det har ingenting med tændrørets varmeverdi at gjøre.
Why does Corona stain occur?
A. Spark plugs have very high voltages applied to them in order to create a spark at the electrode gap. Under certain conditions this high voltage creates a phenomenon called Corona discharge (pictured, left) which occurs over the insulator just above the metal shell. It is formed due to the ionization of the gases around the plug. The oil particles are attracted by this discharge and adhere to the insulator causing the discolouration. In low light conditions this event may be observed as a pale blue glow around the high tension leads and plugs.