The process of joining materials by using electrical current or heat to melt and bond them together.
From electro- + fusion. This technical term crystallized in the 1980s as plastic pipe joining became essential for water distribution networks, blending electrical engineering with materials science.
The beauty of electrofusion is that it works even in wet environments—the fittings are designed to seal themselves as they cool, which is why plumbers love them for underwater or soil-buried pipes.
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