Boundary Layer Corrosion
Interfacial corrosion occurs at phase boundaries where different metal constituents or microstructures meet. Local concentration differences intensify the corrosion reaction and lead to damage in the transition zones.
Physicochemical mechanism of action
Interfacial corrosion occurs when different metal constituents or microstructures come into contact. At these phase boundaries, local concentration differences can occur, which intensify the corrosion reaction. The chemical environment changes strongly here and can lead to accelerated corrosion.
Metallurgical relevance & welding risks
Interfacial corrosion is particularly dangerous because it impairs the mechanical properties of the weld and can cause cracks or wear. In the workshop, it reduces the service life of components and parts.
Workshop practice & instructions
To avoid interfacial corrosion, it is important to create a clean weld and control the chemical environment around the weld zone. Use appropriate shielding agents and pay attention to correct cooling techniques. For special materials like steel or nickel, the material properties impose special requirements on the welding processes.