Migrating Corrosion Inhibitors to Protect Steel Reinforced Concrete Structures

摘要

Most transportation infrastructure is built from steel and concrete. The steel may be in structural sections, such as girders, piles, or rails, or embedded in concrete to form reinforced or prestressed concrete. Concrete provides excellent protection for embedded steel because Portland cement is very alkaline, forming a passive, protective layer on the steel surface. Concrete is also permeable, and even good-quality concrete can be penetrated by aggressive chemical ions that may initiate steel corrosion.