Unmet Need: Long-lasting commercial discrete sacrificial anode (DSA) products
Reinforcement corrosion induced by chloride contamination is a leading cause of structural damage and premature degradation in reinforced concrete (RC) structures, with significant implications for safety, reliability, economics and environmental performance. Discrete sacrificial anode (DSA) is one tool used for corrosion mitigation of steel reinforcement in chloride contaminated concrete. Recent studies reveal that the commercial DSA products have shorter service life than expected due to zinc corrosion products accumulating at the interface and reducing current supply leading to complete failure of the DSA.
The Technology: Improved design and methods for manufacturing DSA.
To overcome the short service life of commercial DSA products, improved methods have been presented including periodical rejuvenation of partially oxidized zinc connected to the anode and encasing material design for DSA using conductive and porous foamed cement paste with carbon fibers.
• Improved and long-lasting DSA are used to mitigate corrosion of salt-contaminated reinforced concrete.
• Reinforced concrete is used in construction and infrastructure development.
• Improved life-cycle performance of newly-designed DSA with effective salt-contaminated reinforced concrete.
• Use and recycle of waste carbon fibers.
Provisional patent application has been filed.