Underwater Wet Welding
Underwater wet welding is a welding method where the workpiece is welded directly in water. It uses special waterproof stick electrodes and is used for quick repairs on offshore structures.
Physical-Chemical Mechanism of Action
Underwater wet welding uses electricity to melt metal. Stick electrodes deliver the current and the workpiece serves as the anode. The water acts as an electrolyte and carries away the released ions.
Metallurgical Relevance & Risks in Welding
The water layer can contain oxygen, which can lead to corrosion. It is important to keep the water clean and cooler than the weld pool to avoid porosity. Wrong electrodes or insufficient cooling can lead to poor weld quality.
Workshop Practice & Instructions
Use special waterproof stick electrodes and make sure the water is clean and cooler than the weld pool. Keep the electrode as close as possible to the workpiece to ensure a homogeneous weld. Monitor the cooling and correct temperature differences quickly.