The most important industrial use of gold is in the manufacture of electronic products. Solid-state electronic devices use very low voltages and currents that are easily interrupted by corrosion or fog up at contact points. Gold is the highly efficient conductor that can carry these small currents and remain free of corrosion. Electronic components made from gold are very reliable.
Gold is used in connectors, switch and relay contacts, soldered joints, connecting cables and connecting strips. Gold plays a vital role in the aerospace industry, where consistent and effective technologies are key to survival. Gold is used to lubricate various mechanical parts, in circuits to conduct electricity and to coat the interior of spaceships to protect people inside them from infrared radiation and heat.