Abstract
Electrodeposition of Zn and Zn-Ni deposits were performed on steel substrates under various conditions from acid sulphate baths in presence of condensation product of 3, 4, 5-trimethoxybenzaldehyde and serine (TMBS). The electrochemical behavior of deposits was studied by polarization and electrochemical impedance techniques. The Zn-Ni-bright deposits obtained from the acid sulphate bath at 4 Adm-2 showed a lower corrosion current (Icorr) and a less negative corrosion potential (Ecorr) compared to Zn-dull, Zn-Ni-dull and Zn-bright deposits. The surface morphology and phase structure of the deposits was studied by Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis.
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