Anti-Corrosive, Microstructural and Physical Investigation of Zn-Cao Coated Steel

This study involved the development of a multifaceted Zn barrier coating through ED technique, followed by a comprehensive characterization of its properties.A MS plate, Zn and CaO were all sourced and assessed, in accordance with ASTM standards.ED process was then employed to coat MS, resulting in Zn-12CaO identification as the formulation with the highest coating thickness, at 0.2304 mm.Electrochemical assessment highlighted exceptional corrosion performance of Zn-12CaO coating, which showed CR of 2.4117 mm/year and Pr of 34.41 Ω.This performance stood out in comparison to the as-received sample, which had a CR of 13.449 mm/year across all Zn-CaO formulations.Microstructural analysis through SEM images unveiled the presence of rough and irregularly shaped refined particles, with the Zn-12CaO coating showing a significant deposit of crystallites.Furthermore, it exhibited remarkable hardness, registering a value of 258.12 BHN.EDS analysis provided insights into the coating's significant elements, contributing to its corrosion resistance and hardness properties.With its impressive hardness value of 258.12 BHN and low CR of 2.0618 mm/year, Zn-12CaO coating emerges as an excellent solution against potential failure in steel, for application in industries requiring durable protective barriers, such as automotive, construction and marine environments.