Exothermic Welding is also called “thermit welding ?or “aluminothermic welding?Exothermic is a chemical term used to describe a reaction that produces heat. For exothermic welding, it is the reaction of one metallic oxide such as copper oxide by another reductant metal, usually aluminum ?yielding molten super-heated copper and aluminum oxide slag. The process of exothermic welding is a method of making electrical connections of copper to copper or copper to steel in which no outside source of heat or power is required.
An exothermic connection is actually a molecular bond formed between 2 metals such as copper and steel. Copper oxide and aluminum are combined and ignited. The result is an exothermic reaction that products molten copper and aluminum oxide slag. The molten copper melts the objects being connected together forming the molecular bond. This bond will not loosen overtime or ***eriorate with age. The connection's current carrying capability is to that which it is being connected. In other words, there is no increase in resistance in an exothermically welded connection as there is in most pressure connections. Throughout the world, exothermic welding has been shown to be the best choice where safety, reliability, current carrying capacity and longevity are critical. |
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