What is Exothermic Welding?
The exothermic welding process is a method of making electrical connections of
copper to copper or copper to steel in which no outside source of heat or power
In this process, granular metals (granular copper oxide and aluminium) are
placed from a satchel into a graphite crucible and ignited.
The reduction of copper oxide by the aluminium (exothermic reaction) produces
molten copper and aluminium oxide slag.
The slag floats to the surface and the disk melts, allowing molten copper to flow
into the weld cavity and complete the weld. The weld is allowed to solidify.
The mold is removed and made ready for the next weld. The process takes
seconds to complete.