Corrosion Performance of Polymer-Coated, Metal-Clad, and Other Rebars as Reinforcements in Concrete.

摘要

Corrosion of reinforcement in concrete has been a matter of great concern in recent years owing to the increase in consumption of deicing salts on highways and bridges in the United States. The problem has been traced to corrosion of reinforcement caused by chlorides present in deicing salts. Various polymer coatings and metal claddings have been proposed (by independent suppliers) in this project with a view to minimize the damage caused to reinforcements in concrete from corrosion owing to chlorides. Coatings include zinc (galvanized), several epoxies, polyvinyl chloride (PVC) coating, and Nylon 11 coating. A stainless steel-clad material is also included as well as pure stainless steel reinforcement bar. The corrosion performance tests include extensive macrocell testing, immersion tests of the polymer-coated rebars, and polarization resistance tests for the metallic rebars.