Intermetallic Layer

In the galvanizing process, the bond between the steel and zinc isn't just a "glue"; it’s a metallurgical fusion. As the steel enters the molten zinc, iron atoms migrate into the zinc, forming several intermetallic layers (Gamma, Delta, and Zeta). These layers are harder than the base steel. However, if they grow too thick, they become brittle, which is why we precisely control the "immersion time" to ensure the coating remains ductile enough for hemming and bending.