The corrosion inhibition efficiency of Nicotiana tobacum (tobacco leaves) on the corrosion performanceudof zinc electrodeposited mild steel in 2 M HCl was studied using weight loss and gasometrical principle.udThe zinc electroplated mild steel coupon of 45 mm by 20 mm was immersed in HCl, in the presence ofudN. tobacum of varying extract concentration of 25, 55, 75 and 100 cm3 at 50°C elevated temperature inud56 min. Increasing rate of hydrogen gas during the chemical reaction was examined. Inhibitionudfeasibility was explained by formation of insoluble complex absorbing adhesion on the surface metal.udHowever, results obtained indicate that, percentage of extract concentration increase as the number ofudH2 gas generated. Extract in acid medium retard corrosion degradation of the deposited mild steel andudforcefully reduce corrosion rate. Micro structural examination through OPM, AFM and XRD revealed theudmorphology and evaluation performance of N. tobacum.
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