Abstract
In this study, the influence of sodium dodecylbenzenesulfonate (SDBS) as additive on the morphology and nucleation mechanism for zinc electrodeposition on steel sheet was investigated using scanning electron microscopy (SEM) and potentiostatic electrochemical techniques. From the analysis of the chronoamperometric transients and the SEM images, an instantaneous nucleation with 3D growth has been proposed in both baths with and without SDBS. It was found that the morphology of zinc electrodeposits varied from initial thin-layered hexagonal plates to a finer ridge and needle morphologies with increasing the overpotential as SDBS was added in the bath solution.
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