Here is a suggested PPT outline to support this essay:
In FCAW, a continuous wire electrode with a flux core is fed through a welding gun, which is connected to a power source. The flux core is a mixture of powdered metal and flux, which produces a shielding gas when heated. As the wire electrode is fed through the gun, it melts and forms a weld pool. The flux core produces a shielding gas that protects the weld pool from atmospheric gases, such as nitrogen and oxygen. flux cored arc welding ppt work
The flux inside the wire generates its own shielding gas. Here is a suggested PPT outline to support