electrode is an electrical conductor used to make contact with a
nonmetallic part of a circuit.
electrode in an electrochemical cell is referred to as either an anode
or a cathode.
Welding electrodes are metal wires with baked on chemical coatings. The
rod is used to sustain the welding arc and to provide the filler metal
required for the joint to be welded.
welding an electrode is used to conduct current through a workpiece to
fuse two pieces together. Depending upon the process, the electrode is
either consumable, in the case of gas metal arc welding or shielded
metal arc welding, or non-consumable, such as in gas tungsten arc
direct current system the weld rod or stick may be a cathode for a
filling type weld or an anode for other welding processes. For an
alternating current arc welder the welding electrode would not be
considered an anode or cathode.
metal-arc welding electrodes may be grouped as bare electrodes, light
coated electrodes, and shielded arc or heavy coated electrodes.
type used depends on the specific properties required that include:
corrosion resistance, ductility, high tensile strength, the type of base
metal to be welded; and the position of the weld that is flat,
horizontal, vertical, or overhead.
Electrodes are made using a metallurgical process in which powder is
compressed and sintered at high temperature to produce rods.
oxide additives are generally dispersed finely in the tungsten powder
prior to forming but some products – composite electrodes – are made up
of a tungsten core with an oxide coating.
welding electrodes are subjected to the most severe service of any
current carrying member of the resistance welding process. These
electrodes must transmit both the welding current and the welding force
through the same area of contact, which is the weld area.
improve electrode life during resistance welding of Zn-coated steels,
TiCP/Ni coatings were deposited onto the surface of electrodes by
electro-spark deposition. In addition, laser treatment was performed to
eliminate cracks formed in the as-deposited TiCP/Ni coating.
Resistance spot welding (RSW) is the primary method for joining sheet
steel in the automotive industries.
Electrodes used in welding forming dies should have chemical composition
similar to the composition of the substrate, because significant
composition differences between the electrode material and the die
material are connected with a risk of extended cracking during quenching
development of welding technology for tool steels, especially in the
case of expensive tools, such as pressure casting dies has a profound
justification taking into account economical advantages and quick repair
possibilities, which is a matter of principal importance in the case of
a lot production of pressure castings.
European Welding Consumables market is currently in the stage of
maturity. With the stick electrodes being continually replaced by the
wires, the market growth has been declining.
European welding consumables market is facing favourable demand
conditions from the end user industries.
Commercial production of welding electrodes was started in India in
early 1960s. At present there are 28 organised sector welding electrode
units with installed capacity of 1054.61 million running meters in
technology of welding electrode production was received from developed
countries like Sweden, Germany, USA, and UK through foreign
collaborations and joint ventures.
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