Using cellulose fibers and wood flours in coatings of welding electrodes is one of the oldest applications for these functional additives. The coating of the welding electrodes takes on specific tasks during welding. The type and structure of the coating determine the melting character of the rod electrode and its welding properties. Cellulose welding electrodes is very popular in the market because it is widely used in technical and construction industries.
What Are Advantage of Welding Electrode?
ADVANTAGES
- Sound Gas Shielding: The gas shield generated by cellulose combustion contains hydrogen, carbon monoxide and carbon dioxide. Between 30 and 45ml hydrogen/100gm can be found in the weld. This has two consequences: good protection of the weld pool and a high level of diffusible hydrogen in the weld metal and heat-affected zone. The high percentage of hydrogen is the cause of the high deposition rate and deeper penetration by the creation of the punchy arc for which this kind of electrode is well known.
- Arc Characteristics: Deep penetrating welding in every position is about the fact that coated welding electrodes are sometimes called ‘stove pipe electrodes’. This position can enhance the weld and helps to improve efficiency and productivity, thanks to quick cooling of the slag. This method of welding should be performed by an experienced welder who can put down welds in quick succession, to maintain a hot welding condition and enable hydrogen to escape.
- Electrode Polarity: The titanium compounds in the coating provide arc stability as well as help clean the slag easily. Adding a certain amount of ferromagnetism to the coating makes it possible to compensate for the manganese that is lost through oxidation during welding and to deoxidize the weld pool. Since these cellulose welding electrode are generally manufactured using a sodium silicate binder, they can best be used with DC(+) polarity.
- Best for root pass
UNIQUE FEATURES
- High Arc Voltage
- Ease of removing slag: Their big advantage is the increased speed they enable through the stove pipe technique or vertical down welding – but not weld quality.
- Welding in Vertical down Position: Vertical down welding capability
- Formation of Hydrogen
Different Types of Cellulose Welding Electrodes Mall
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