deoxidizer
deoxidant
deoxidizing agent

It is used as a deoxidizer and an alloying element in steel.

A deoxidizer is a chemical compound used in a reaction or process to remove oxygen.

It is a very good deoxidizer of copper.

Ferromanganese is used as a deoxidizer for steel.

Titanium is added as a degasser and deoxidizer, but it also increases fluidity.

Calcium silicide is used for manufacture of special metal alloys, e.g. for removing phosphorus and as a deoxidizer.

Hydrogen (AWS type 7): Strong deoxidizer, highly thermally conductive.

Ferrouranium is used as a deoxidizer (more powerful than ferrovanadium), for denitrogenizing steel, for forming carbides, and as an alloying element.

This may be accomplished by adding metallic deoxidizing agents to the melt either before or after it is tapped, or by vacuum treatment, in which carbon dissolved in the steel is the deoxidizer.