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Galvannealed (GA) coatings are composed of Fe-Zn phases, being its quality greatly affected by the phase’s\uddistribution, making it important to be characterized. Glow Discharge Optical Emission Spectroscopy (GDOES) technique\udallows a quick and accurate evaluation of the chemical composition profile along the coating thickness. In this study, GA\udcoatings were produced varying the temperature (530°C, 550°C, 580°C) and times (0 s, 5 s, 15 s, 60 s) of galvannealing\udtreatment, in order to change the Fe-Zn phases distribution. The coatings were characterized by SEM and XRD. GDOES\udanalyses were performed to identify the distributions of Fe and Al and correlate them with the η, ζ, δ and Γ phases. It\udwas found that variations in temperature and treatment time influenced the distribution of Fe and Al. For short times,\udFe and Al were concentrated near the coating/substrate interface and as the time increase concentrations became more\uduniform along the coating. The characterization of GA coatings from the Fe and Al distribution were effective for checking\udthe distribution of Zn-Fe phase

ESTUDO DA DISTRIBUIÇÃO DE FASES Fe-Zn EM REVESTIMENTOS GALVANNEALED UTILIZANDO A TÉCNICA GDOES