The “self-healing” property of aluminized zinc steel coils refers to the phenomenon that when the coating is scratched or damaged, zinc and aluminum in the surrounding coating will migrate to the damaged area through electrochemical action, re-forming a dense oxide protective film on the exposed substrate surface, filling the damaged gaps and preventing further corrosion of the substrate.
This property stems from the difference in electrochemical activity and synergistic effect between aluminum and zinc: zinc first sacrifices itself to provide cathodic protection, while aluminum participates in forming a stable aluminum oxide film. Together, they achieve the “automatic repair” of the damaged area, greatly improving the durability of the product in complex environments.
What is the “self-healing” property of aluminized zinc steel coils?
- January 27, 2025