Zinc coated mild steel is usually applied to protect the substrate surface from corrosion. In this study, Zinc Oxide nanostructure layer will be used to protect the surface of mild steel from corrosion. The Zinc Oxide nanostructure will be synthesized by sol-gel method. After the solution was prepared, it then coated on mild steel surface using spin coater and anneal at different temperature to see the growth of Zinc Oxide nanostructures. After the sample has been coated it will characterize using FESEM, XRD and LPR.