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what is the purpose of the solid flux that covers the electrode?

what is the purpose of the solid flux that covers the electrode?

Engineering   Mechanical-Engineering   
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Answer #1

1. The most important purpose of flux is to shield the weld metal from the oxygen and nitrogen from the air while it is in molten state.

2.Weld metal will be free from gas pockets and have right strength and required ductility.

3.It also plays a important role in stabilization of arc.

4.Alloying elements such as Cr,Va W can also be added by including them in coating.Thus it provides specific mechanical properties to the weld metal.

5.It helps in furnishing slag which acts as cleaner and absorb impurities from weld pool.

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