Iron straps

Iron straps. Iron straps of zinc layer is not easy to change, in the dry air in the humid air, iron straps can generate a layer on the surface of zinc is zinc carbonate dense alkali type membrane, it can protect the internal zinc from corrosion. Iron straps of galvanized layer and steel - iron Zinc micro batteries. Even galvanized layer and local damage, but that doesn't show much steel substrate, the metal packing tape steel substrate as cathode under protection.