Joining different metals may induce galvanic corrosion. Galvanic corrosion occurs when two metals with different electrolytic potential come into contact in the presence of an electrolyte such as water. The table below summarises the risks of pairing Cor-Ten steels with other metals commonly used in facades. The recommended option is to use fasteners or substructure made of weathering steel. If this is not possible, it is suggested to use nylon spacers among materials to avoid direct metallic contact.