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Mechanistic Modeling Of The Impedance Response Of Cathodic Reduction Of Hydrogen Ion In Strong Acidic Environments

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EIS is one of the techniques which is frequently used for studying electrochemical reactions on a metal surface in an aqueous environment. However, one of the main challenges in using EIS is the interpretation of results. Various interpretation methods and their associated uncertainties lead to ambiguous outcomes and often end up with a biased analysis One of the methods frequently used is the so-called “equivalent electrical circuit” method which models the response of and electrochemical system by matching it to that of a combination of “analogous” electrical circuit components, such as resistors, inductors, capacitors, etc.

Product Number: 51322-17900-SG
Author: Negar Moradighadi, Yoon-Seok Choi, Srdjan Nesic
Publication Date: 2022
Industries: Cathodic Protection , Coatings and Linings , Coatings
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Studying the mechanism of electrochemical reactions benefits from implementation of steady state and transient techniques such as electrochemical impedance spectroscopy (EIS). To develop an understanding of experimental results and how they relate to corrosion mechanisms requires their comparison with a mechanistic model. In this study, a physico-chemical model was used to simulate both the steady state potentiodynamic sweep, and the EIS response of cathodic reduction of H+ in an acidic environment. The modeled steady state potentiodynamic sweep, Nyquist plot and Bode plot were validated by comparison with experimental data.

Studying the mechanism of electrochemical reactions benefits from implementation of steady state and transient techniques such as electrochemical impedance spectroscopy (EIS). To develop an understanding of experimental results and how they relate to corrosion mechanisms requires their comparison with a mechanistic model. In this study, a physico-chemical model was used to simulate both the steady state potentiodynamic sweep, and the EIS response of cathodic reduction of H+ in an acidic environment. The modeled steady state potentiodynamic sweep, Nyquist plot and Bode plot were validated by comparison with experimental data.

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