Definition - What does Sheathing mean?
Sheathing refers to a method of corrosion prevention in which steel structures are covered with an insulating material. Such materials include paints, polyethylene resins, fiber-reinforced plastics and metals.
Corrosionpedia explains Sheathing
Sheathing is primarily used on surfaces that have prolonged and severe exposure to corrosion causing agents, such as structural beams that are rooted in or near the ocean. Such structures are perpetually in contact with water, salt and free ions, which act as facilitators for corrosive chemical reactions.
These beams can be pre-treated with reliable corrosion prevention methods such as sheathing. Seawater resistant stainless steel may be welded to such structures via indirect seam welding, thus prolonging the life and durability of the base surface.