Microstructural and Electrochemical Characterization of Zinc Coating onto Low Carbon Steel Substrate

Ordinary steels have poor corrosion resistance in chloride medium leading to a deterioration of their longevity. The present research work focuses on the deposition and characterization zinc layer by dip galvanizing onto low carbon steel ASTM A283M-98 sheet form using different techniques such as optical microscopy, scanning electron microscopy (SEM) coupled energy dispersion spectrometer (EDS), atomic force (AFM) X-ray diffraction (XRD). Optical analyses reveal ferritic microstructure with presence small amount pearlite. deposited is composed four Fe–Zn intermetallic phases, namely eta (η), zeta (ζ), delta (δ), gamma (Γ). electrochemical study 0.5M NaCl indicate an enhancement coated multi-phased layer, characterized decrease current (Icorr = 3.36μA/cm2) rate (Cr 0.29mm/year) compared bare 12.29μA/cm2 Cr= 0.72mm/year).