Electrochemical Measurements for the Corrosion Inhibition of Mild steel in 0.5 M HCl Using poly(epichlorohydrin) Derivatives

Document Type: Research Article

Authors

1 Department of Chemistry, College of Science, Malek-Ashtar University of Technology, Shahin-Shahr, I.R. IRAN

2 Chemistry & Chemical Engineering Research Center of Iran, Tehran, I.R. IRAN

10.30492/ijcce.2020.38997

Abstract

In this article, the inhibition capability of poly(epichlorohydrin) containing phenylhydrazine(PMP), 4-nitrophenylhydrazine(PMN), and 2,4- dinitrophenylhydrazine(PMDN) on mild steel was investigated in 0.5 M hydrochloric acid. The electrochemical studies demonstrate that these polymers act as mixed-type inhibitors but increasing their concentration caused the shift of corrosion potential to cathodic potential. Also, adsorption of these polymers on the mild steel surface obeys a Langmuir adsorption isotherm. The results obtained from the potentiodynamic polarization and Electrochemical Impedance Spectroscopy (EIS) are confirmed by Field Emission Scanning Electron Microscopy (FE-SEM), X-ray Energy Dispersive Spectroscopy (EDS), and Mapping analysis (MAP). The results of this study indicate that samples of PMDN have the lowest corrosion speed.

Keywords

Main Subjects


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