Sodiya, Ezekiel FolorunsoDawodu, Folasegun Anthony2021-12-202021-12-202021-10-132062-0810http://hdl.handle.net/2437/326517Corrosion inhibition of steel by Polyurethane Extract-primer (PEP) containing plant leaf extracts was compared with Polyurethane Conventional primer (PCP) containing zinc phosphate and zinc chromate as inhibitors. The primers were investigated using gasometric technique in 5 °C steps of temperature increase from 25 to 50 °C in 1.0 M HCl as corrodent. The PEP of 34.24 percent actives compared with PCP of 56.35 percent actives gave the same inhibition efficiencies of 82.4%. Extract primers of low percent active concentration were more effective and less expensive than that of conventional primers.enJatropha curcasSida acutaPolyurethane Conventional primerPolyurethane extract primermild steelpercent activehttps://akjournals.com/view/journals/1848/13/1/article-p80.xml10.1556/1848.2021.00310International Review of Applied Sciences and Engineering113