Abstract
N-CDs, as a novel and eco-friendly inhibitor, was synthesized easily by hydrothermal carbonization technique aiming to inhibit mild steel (MS) corrosion in 1 mol/L HCl. XRD, TEM, SEM, FTIR, UV-vis spectrophotometer and photoluminescence (PL) were utilized to characterize N-CDs. Potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) techniques along with the complementary surface studies were combined to investigate the corrosion inhibition capability of N-CDs for MS. N-CDs were found nanometer-sized (≈ 4 nm) with quasi-spherical morphology and high crystallinity. Inhibition efficiency, directly proportional to concentration but inversely with temperature, was measured as high as 96.73% (PDP) and 95.21% (EIS) at 200 mg/L. Inhibition mechanism refered mainly to adsorption process that good obeyed Langmuir adsorption isotherm. The surface studies, quantitatively verified by EDX, showed a smoother surface of MS in presence of the N-CDs. Furthermore, the UV-visible spectroscopy effectively revealed the complexations between iron and metal surfaces.
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F. Nasr did the experimental work and wrote the first paper draft E. A. Matter supervised the experimental work, share writing the paper, explaination of data and revising the manuscript G. A. El-Naggar supervised the experimental work, share writing the paper, explaination of data and revising the manuscript Gaber Hashem Gaber Ahmed supervised the experimental work, share writing the paper, explaination of data and revising the manuscript
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Matter, E.A., El-Naggar, G.A., Nasr, F. et al. Facile synthesis of N-doped carbon dots (N-CDs) for effective corrosion inhibition of mild steel in 1 M HCl solution. J Appl Electrochem 53, 2057–2075 (2023). https://doi.org/10.1007/s10800-023-01895-y
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DOI: https://doi.org/10.1007/s10800-023-01895-y