Differentiation of Consumable and non consumable electrodes
There are two types of electrodes that are used normally during a welding process. This can be a consumable electrode of a non consumable electrode.
Consumable electrodes are the ones that would have significant changes in their structure when they are used. This is to say that these electrodes would be consumed in their use. Non consumable electrodes are the ones that are not consumed during the process of welding.
Some welding processes require a flux coated electrode. These electrodes when used would create a smoke around the weld. This would help to stop the air around the weld. Also a consumable electrode can melt and mix with the weld creating a stronger bond.
Therefore the choice between using a consumable and a non consumable electrode lies between the types of metal that is set up for welding. A consumable electrode can aid in the process of better elimination of impurities.