Corrosion Control of AISI 1007 Steel Using Hybrid Inhibitors of Plant Extracts

Owing to the adverse effects of corrosion, scientist have devised several means of its control. Amongst these means is the use of inhibitors which could be synthetic or from natural sources. Synthetic inhibitors are often toxic and expensive, hence inhibitors from natural source are preferred. Action of Moringa oleifera and Jatropha curcas leaves extracts have been independently explored for corrosion inhibition on metals. In this study, equal mixture of Moringa oleifera and Jatropha curcas leaves extract was examined for inhibiting corrosion on AISI 1007 steel in acidic medium via gravimetric, gasometric and thermometric analysis methods. The appropriate experimental techniques as recorded in previous studies and ASTM standards were adopted. It was observed that with each method used that the efficiency of inhibition increased with the rise in the inhibitor’s concentration while the volume of hydrogen gas evolved increased with increasing inhibition concentration. The maximum inhibitive efficiency obtained on equal proportion of the mixture was 95.56%. The utilization of the hybrid extract from the two leaves gave superior inhibition efficiency than the independently used as extract as reported from previous studies. Hence, equal mixture of Moringa oleifera and Jatropha curcas leaves extract is recommended for utilization as potential inhibitor in industries.