Weld sealing auxiliary
Welding auxiliary agents for sealing are chemical aids that mechanically protect joints or block gas entry. They improve root geometry and prevent porosity.
Physicochemical mechanism of action
Welding aids for sealing the weld react chemically with the metal or block gas paths. They can act as deoxidizers by tying up oxygen and preventing porosity, or they can protect the surface mechanically.
Metallurgical relevance & risks when welding
Lack of welding aids can lead to porosity and cracking. Overuse can cause grain coarsening and reduce the toughness of the material. Selecting the right auxiliary material is critical for a high-quality weld.
Workshop practice & instructions
Use welding aids per the manufacturer's instructions. Make sure the correct amount is used and the material is properly prepared before welding. Monitor the cooling temperature and time to achieve optimal grain formation.