A STUDY ON THE EFFECT OF PHARMACOLOGICALLY ACTIVE LAWSONIA INERMIS LINN. LEAF EXTRACT ON ZINC ELECTRODEPOSITION ON MILD STEEL
Lawsonia inermis L. is a much branched shrub or small tree commonly known as henna which invites attention of the investigators worldwide for its pharmacological profile ranging from anti inflammatory to anti cancer activities. The present study is carried out to find the effect of Lawsonia inermis L. (henna) leaf extract (primary colouring agent is 2-hydroxy-1,4-naphthoquinone) on electrodeposition of zinc on mild steel. The effect of bath constituents, pH, current density and temperature on nature of deposits are studied through Hull cell experiments. The bath constituents and operating conditions are optimized. The increase in the current efficiency and throwing power reveals the action of henna on electrodeposition. Polarisation, SEM, EDAX and XRD photographs obtained from optimum bath reveal fine grained deposit in the presence of extract and hence modify the morphology of zinc deposit. IR spectrum of the scrapped deposit shows the inclusion of the addition agent.