Sähköpuikkohitsaus

Sähköpuikkohitsaus, also known as shielded metal arc welding (SMAW) or simply stick welding, is a common and versatile welding process. It utilizes a consumable electrode coated in flux to lay the weld. The electric arc generated between the electrode and the workpiece melts both materials, creating a molten weld pool. The flux coating on the electrode serves multiple purposes. It stabilizes the arc, shields the molten weld pool from atmospheric contamination by generating protective gases, and introduces alloying elements to improve the weld's properties.

The process is relatively simple to learn and requires minimal equipment, making it suitable for a wide range of applications. Power is supplied by a welding machine, which can be an AC or DC type. The operator manually guides the electrode along the joint, maintaining a consistent arc length and travel speed. As the electrode is consumed, the slag formed from the flux floats to the surface of the weld bead, protecting it as it cools. Once solidified, the slag is chipped away to reveal the finished weld.

Sähköpuikkohitsaus is widely used in construction, fabrication, repair, and maintenance due to its portability and ability to weld in various positions and conditions, including outdoors and in windy environments. It is effective for joining a variety of metals, particularly steel and cast iron, and is well-suited for thick materials. Different types of electrodes are available, each designed for specific metals and welding requirements.