Zincalume Steel® Duplex Coatings (combination of Barrier and Sacrificial Coatings)

Alloying of metals with differing corrosion performance allows the coating to be created that offers both barrier protection to protect the underlying steel, as well as sacrificial protection in the event the steel is cut, scratched, drilled or damaged. These coatings are very long-lasting and at the same time protect exposed areas of steel.

ZINCALUME STEEL® IS TESTED AND PROVEN TO LAST LONGER

Next-generation ZINCALUME® steel AM125 introduces magnesium into the aluminum-zinc alloy coating, which improves galvanic protection by activating the aluminum.

The result is more effective corrosion resistance. BlueScope Steel research and testing have found that the addition of 2% magnesium is the optimum level of corrosion performance and coating integrity. Along with a capital investment of over $100 million to facilitate the required manufacturing capability, BlueScope Steel can now produce next-generation ZINCALUME® steel AM125 with even greater durability and a more efficient protective coating mass.

Zincalume vs Galvanized Steel Salt Spray Test

To ensure the durability and reputation of next-generation ZINCALUME® steel, BlueScope Steel conducted a comprehensive testing program that included a series of accelerated laboratory corrosion tests as well as a strong emphasis on real-world outdoor exposure tests. A thorough and rigorous testing program ensured that the new product provided optimum performance.

ZINCALUME® Steel Product Specification

ZINCALUME® G550 steel with Activate® technology is a hot-dipped aluminum/zinc/magnesium alloy coated structural steel with a regular spangle surface, a guaranteed minimum yield strength of 550MPa with limited ductility.