Wet Electric Faults, Part I Dendrites

Conductive dendrites occur as a result of electrochemical reaction between metal conductors bridged by water and the voltage impressed between the conductors. Their formation is the initial step in a sequence that can result in an open circuit, short circuit or disabling change in circuit impedance. The dendrites of various metals were observed and photographed under the microscope. Growth rates were measured for voltage gradients and electrode spacings appropriate to electrical and electronic equipment.