Synergistic Study of Modified Sweet Potato Starch and KI for Corrosion Protection of Mild Steel in Acidic Media

被引：0
|
作者：
Anyiam C.K. [1 ,3 ]
Ogbobe O. [2 ]
Oguzie E.E. [3 ]
Madufor I.C. [2 ]
机构：
[1] Department of Prosthetics and Orthotics, Federal University of Technology, Owerri
[2] Department of Polymer and Textile Engineering, Federal University of Technology, Owerri
[3] Electrochemistry and Materials Science Research Laboratory, Department of Chemistry, Federal University of Technology, Owerri
来源：
Journal of Bio- and Tribo-Corrosion | 2020年 / 6卷 / 03期
关键词：
AFM; Alkaline-modified starch; Biopolymers; FTIR; Mild steel; Sulphuric acid;
D O I：
10.1007/s40735-020-00362-x
中图分类号：
学科分类号：
摘要：
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. © 2020, Springer Nature Switzerland AG.
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