To join or fuse materials together using electrical heat or current, commonly used in welding and pipe fitting.
From electro- (electricity) + fuse (to blend or join). The term emerged in the mid-20th century as electrical welding techniques advanced, combining electrical engineering with traditional fusion methods.
Electrofusion is literally how modern plastic water pipes get connected—electrically heated coils inside fusion fittings melt the pipe plastic together, creating joints so seamless they're stronger than the pipe itself!
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