What is the role of “Friction Welding” in bi-metallic terminal lugs?

When connecting aluminium cables to copper busbars, galvanic corrosion is a major risk. Professional-grade bi-metallic lugs utilize a friction-welded joint to bond an aluminium barrel to a copper palm. This factory-sealed bond prevents moisture and oxygen from reaching the interface of the two metals, eliminating the chemical reaction that leads to high resistance and fire hazards.