This is a welding process for joining two lengths of railway together. The process employs superheated copper alloy to permanently join the rail. The process employs an exothermic reaction of a copper thermic composition to heat the copper, and requires no external source of heat or current. The chemical reaction that produces the heat is an aluminothermic reaction between aluminium powder and a mixture of copper oxides with a chemical formula.
Arc Welding also known as manual metal arc (MMA) welding, is a manual process that uses a consumable electrode coated in flux to lay the weld. An electric current, from a welding power supply, is used to form an electric arc between the electrode and the metals to be joined. This is a versatile process which has been adapted to the rail industry. Instead of replacing worn rail, it is instead arc welded back to its original state, saving the client time and money.