Question

Why is reverse polarity is use in the electric arc welding of brass?

Answer 1

Answer:

The deepest penetration is usually obtained with the direct current electrode positive (DCEP) polarity which also gives the best surface appearance, bead shape and resistance to porosity. Direct current electrode negative (DCEN) polarity gives an increased burnoff rate and decreased penetration as maximum heat is developed at the tip of the electrode instead of at the surface of the plate. For this reason, DCEN polarity is often used for surfacing or cladding and for other applications where high deposition rates are required, with minimum dilution from the parent material. The flux/wire consumption ratio is less with DCEN polarity than with DCEP so transfer of alloying elements from the flux is reduced.

Answer 2

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HERE IS UR ANSWER

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☑reverse polarity is used in the electric arc welding of brass because ↪

✔✔It is preferred due to its low melting point.

✔✔due to itz low resistivity

✔✔itz an alloy.