Leaf extracts as green substitute to toxic zinc chromate and zinc phosphate additives in Polyurethane primers for corrosion inhibition of steel

Ezekiel Folorunso Sodiya, Folasegun Anthony Dawodu
2021 International Review of Applied Sciences and Engineering  
Corrosion 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
more » ... percent active concentration were more effective and less expensive than that of conventional primers.
doi:10.1556/1848.2021.00310 fatcat:qmqz4f5xjzh3hdsqy3czk7v5xi