MMA welding consists in:
bringing the electrode closer to the welded material (bonded material), triggering an electric arc which melts the material and the electrode to form a liquid welding pool.
After the arc has moved away, the welding pool solidifies to form a permanent joint. The electrode coating emits gases under the influence of heat, which create a protective atmosphere; it melts and after solidification it covers the connector with a protective layer of slag which should be removed mechanically after cooling down.
The MMA method is universal due to the type of steel to be welded, the type of construction, the welding position and place. MMA devices can be used for:
- welding of steel structures in the shipbuilding industry and in the majority of manufacturing industries,
- welding of pipelines,
- in installation works at construction sites,
- welding in field conditions and at heights and in places with a difficult access,
- it is also a favourite method of hobbyists and small repair workshops.
