What is Cellulosic Electrode?
The coating of cellulosic electrodes contains a relatively high proportion of cellulose substances, intended to produce excellent penetration by providing a high hydrogen content in the arc when welding in any position.
The organic compounds in the coating decompose in the arc to form carbon monoxide, carbon dioxide and hydrogen, which increase the arc tension, so the welding arc becomes stronger and harder. Compared with other types of electrodes, with the same current values, a 70% deeper penetration can be obtained with cellulose electrode.
This type of electrode is generally produced with thin or medium coating thickness. When the coating is thin, a light amount of slag is formed on the welding bead and the spatter loss is high. On the other hand, the gap filling and vertical down welding capability as well as penetration of the weld obtained by this electrode is good.
Since this electrode can be used in every position, specifical in vertical down, it has a wide range of applications in the ship building industry and in the welding of pipelines with a wall thickness of less than 12.5mm, the cellulose that burns during welding forms a very good protection gaseous atmosphere.
Features of Cellulosic Electrode:
Deep penetrating welding in every position
Vertical down welding capability
Weld metal with good mechanical properties
A less amount of welding pool is developed
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