Abstract
Native starch (NS) extract from sweet potato was modified by alkaline treatment. The alkaline modified starch (AMS) and NS were characterized and assessed as corrosion inhibitor of mild steel under acidic conditions by gravimetric and potentiodynamic polarization techniques. Results obtained indicate that AMS exhibited higher inhibition efficacy that was stable over time. Synergistic use of potassium iodide improved the inhibitive efficacy of AMS. Polarization data propose that AMS operated via a mixed-inhibition mechanism and the experimental adsorption data followed Langmuir isotherm. The adsorption of AMS on the metals was established by Fourier transform infrared spectroscopy and Atomic force microscopy.
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Anyiam, C.K., Ogbobe, O., Oguzie, E.E. et al. Synergistic Study of Modified Sweet Potato Starch and KI for Corrosion Protection of Mild Steel in Acidic Media. J Bio Tribo Corros 6, 70 (2020). https://doi.org/10.1007/s40735-020-00362-x
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DOI: https://doi.org/10.1007/s40735-020-00362-x