Journal
ELECTROCHIMICA ACTA
Volume 246, Issue -, Pages 924-930Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2017.06.096
Keywords
Carbon steel; Complex-capacitance plot; Power-law model; Oxide film; Electrochemical impedance spectroscopy
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Steady-state polarization curves, X-ray photoelectron spectroscopy, and impedance spectroscopy were used to explore the electrochemical properties for carbon steel in alkaline electrolytes. The complex-capacitance representation allowed determination of a capacitance value at high frequency, from which the oxide film thickness could be estimated. These results are in good agreement with values obtained using the power-law model, providing a single mathematical model that is shown to apply in both the anodic and cathodic domains for the characterization of an oxide layer. (C) 2017 Elsevier Ltd. All rights reserved.
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