Localized Electrochemical Impedance Spectroscopy for Studying the Corrosion Processes in a Nanoscale

2015 ◽  
Vol 228 ◽  
pp. 383-393 ◽  
Author(s):  
B. Łosiewicz ◽  
Magdalena Popczyk ◽  
Agnieszka Smołka ◽  
Magdalena Szklarska ◽  
Patrycja Osak ◽  
...  
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Pitting Corrosion ◽  
Review Paper ◽  
Electrochemical Impedance ◽  
Protective Coatings ◽  
Impedance Measurement ◽  
Alloy Steels ◽  
Improved Technique ◽  
Structural Solutions

This work deals with localized electrochemical impedance spectroscopy (LEIS) which is an improved technique of the commonly used electrochemical impedance spectroscopy (EIS). Thanks to modern structural solutions, the LEIS technique ensures local impedance measurement. Therefore, it is used in the research into point corrosion, such as the pitting corrosion, and in the research into protective coatings or into alloys including alloy steels. This review paper presents the basic theory and the usability of the LEIS based on the literature on the newest research in the field of corrosion.

scholarly journals Impact of Relaxation Time on Electrochemical Impedance Spectroscopy Characterization of the Most Common Lithium Battery Technologies—Experimental Study and Chemistry-Neutral Modeling

2021 ◽  
Vol 12 (2) ◽  
pp. 77
Author(s):  
Md Sazzad Hosen ◽  
Rahul Gopalakrishnan ◽  
Theodoros Kalogiannis ◽  
Joris Jaguemont ◽  
Joeri Van Mierlo ◽  
...  
Keyword(s):  
Relaxation Time ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Impedance Measurement ◽  
Nonlinear Behavior ◽  
Lithium Ion ◽  
Health Condition ◽  
Battery Cell ◽  
Rest Time

In electrified vehicle applications, understanding the battery characteristics is of great importance as it is the state-of-art principal energy source. The key battery parameters can be identified by one of the robust and nondestructive characterization techniques, such as electrochemical impedance spectroscopy (EIS). However, relaxing the battery cell before performing the EIS method is crucial for the characterization results to be standardized. In this study, the three most common and commercially available lithium-ion technologies (NMC/graphite, LFP/graphite, NCA/LTO) are investigated at 15–45 °C temperature, in the range of 20–80% state of charge (SoC) and in fresh and aged state of health (SoH) conditions. The analysis shows that the duration of the relaxation time before impedance measurement has an impact on the battery’s nonlinear behavior. A rest time of 2 h can be proposed, irrespective of battery health condition, considering neutral technology-based impedance measurement. An impedance growth in ohmic and charge transfer characteristics was found, due to aging, and the effect of rest periods was also analyzed from an electrochemical standpoint. This experimental data was fitted to develop an empirical model, which can predict the nonlinear dynamics of lithium technologies with a 4–8% relative error for longer rest time.

Applications of dynamic electrochemical impedance spectroscopy (DEIS) to evaluate protective coatings formed on AZ31 magnesium alloy

RSC Advances ◽  
2015 ◽  
Vol 5 (37) ◽  
pp. 29589-29593 ◽  
Author(s):  
A. Srinivasan ◽  
Kwang Seon Shin ◽  
N. Rajendran
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Magnesium Alloy ◽  
Impedance Spectroscopy ◽  
Phase Angle ◽  
Electrochemical Impedance ◽  
Protective Coatings ◽  
Az31 Magnesium Alloy ◽  
Applied Potential ◽  
Dynamic Electrochemical Impedance Spectroscopy

Increase in magnitude (IZI) and phase angle maximum values with applied potential reveal the protective nature of the coating.

scholarly journals EFFECT OF HEAT TREATMENT ON THE CORROSION BEHAVIOR OF AL-10%WT MG ALLOYS

2017 ◽  
Vol 23 (3) ◽  
pp. 264
Author(s):  
Samira Zermane ◽  
Abdelouahed Chala ◽  
Okba Belahssen
Keyword(s):  
Heat Treatment ◽  
Electron Microscope ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Pitting Corrosion ◽  
Electrochemical Behavior ◽  
Electrochemical Impedance ◽  
Electrochemical Techniques ◽  
Corrosion Resistant ◽  
Polarization Technique

<p>In the present investigation, the effect of heat treatment on the electrochemical behavior of Al-10% wt Mg alloy in 3.5% wt NaCl was study by different electrochemical techniques such as, polarization technique (Tafel plot) and electrochemical impedance spectroscopy. It has been shown that, the corrosion resistant of the alloy decreased for the aging at 250 °C for 24 h. However, this latter increased with naturally aging. The SEM (electron microscope) and Energy Dispersive EDS characterization have shown that the alloy with the two treatments of aging became susceptible to the pitting corrosion.</p>

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