Effects of Nicotiana tobaccum extract additive on the quality of electroplating of zinc on mild steel.
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Experimental investigations have been performed to determine the effects of nicotiana tobaccum (tobacco)
extract additive on the electrodeposition of zinc on mild steel in acid chloride solution. The
experiments were performed under different plating time, different additive concentrations and fi xed pH
conditions. Zinc electrodeposition on mild steel was performed using a DC – supply at defi ned operating
parameters. The surface of the plated steel was examined using scanning electron microscopy (SEM);
and Energy Dispersive Spectroscopy (EDS) for the surface elemental composition analysis. Different
surface characteristics were obtained depending upon the concentration of the additive and the plating
time. The corrosion resistance of the plated surface was also determined by a gravimetric method. The
quality of the electro-deposition of zinc was good as indicated by the microstructural morphology of the
plated surface except for the few porosities observed. The electrodeposition process was sensitive to the
changes in the additive concentration and plating time. Any variation in the plating parameter produced
an entirely new and different surface morphology.
Keywords
TJ Mechanical engineering and machinery