Aluminium is used in thermite welding because ndash ........

General Science (Easy) Chemistry

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Aluminium is used in thermite welding because –

aluminium is a light metal

aluminium has more affinity for oxygen

aluminium is a strong oxidising agent

aluminium is a reactive metal

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Explanation:

aluminium has more affinity for oxygen

In thermite welding, aluminium powder is used along with ferric oxide. Aluminium has more affinity towards oxygen and it reduces ferric oxide to elemental iron during welding and also produces a lot of heat. The molten elemental iron thus formed will seal the broken parts to have strong bonding.