What is exothermic welds?

Exothermic welds also known as aluminothermic welding, thermit welding, or thermite welding is a welding process used to join two conductors (usually copper) together. The process involves a chemical reaction between aluminum and metal oxides, which produces a very high temperature, over 2,500 degrees Celsius. This high temperature melts the conductors and the filler material, creating a permanent, homogeneous and molecularly bonded connection between them.

Exothermic welds are commonly used in power transmission, telecommunications, and railway industries where electrical connections need to be made in harsh and aggressive environments. The benefits of exothermic welding include its ability to provide a safe, reliable and long-lasting connection that is resistant to moisture, corrosion, and other environmental factors that can degrade traditional mechanical or soldered connections.

The process requires specialized equipment, including a graphite mold, thermite powder, a striker, and a crucible to hold the molten metal. It is also important to take safety precautions when performing an exothermic weld, as the high temperatures and sparks produced during the process can be dangerous if not properly handled.