what is the thermic welding
Answers
The thermite welding or thermic welding is the process of welding the joints of iron using thermit reaction.
Thermit reaction is the reaction of metal oxide with the aluminum. The aluminum acts as a reducing agent and the reaction is highly exothermic and hence called a thermite reaction.
The aluminium reduces the oxide of another metal, most of the times, it is iron oxide (FeO) because aluminium is highly reactive. The reaction involved can be shown as:
Fe2O3 + 2Al → 2Fe + Al2O3
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Explanation:
Exothermic welding, also known as exothermic bonding, thermite welding (TW),[1] and thermit welding,[1] is a welding process that employs molten metal to permanently join the conductors. The process employs an exothermic reaction of a thermite composition to heat the metal, 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 metal oxide.