There are two main modes for monitoring the electrochemical reactions through EIS, i.e., the galvanostatic mode and the potentiostatic mode. One of the advantages of conducting EIS analysis is that we can better understand reactions on the electrode with relatively simple steps and analysis 4.In the EIS analysis, the magnitude and phase of the sample’s impedance at different frequencies are accurately measured. In order to track corrosion, we need to monitor the corrosion reaction in real-time so that proper and timely interventions can be taken in advance.Įlectrochemical Impedance Spectroscopy (EIS) analysis is a very effective way to monitor metal corrosion. Once the metal’s structural strength is destroyed by corrosion, oil leakage occurs, which often results in unnecessary economic losses and environmental pollution 3. However, one of the disadvantages of typical metallic materials is that they are easily corroded, especially when exposed to an electrolyte solution, resulting in electrochemical corrosion on the surface 2. Compared to other bulky conventional setups, our device eliminates the design complexity while still showing insights into the corrosion reaction.ĭue to their excellent electrical conductivity, thermal conductivity, and ductility, metallic materials, such as steel, have been widely used in making oil pipes 1.
The result showed that the proposed FDICS is able to obtain the sample’s impedance spectroscopy, which could help researchers test its corrosion severity on a metallic sample in-situ. Furthermore, we used the proposed FDICS to monitor a metal corrosion experiment and performed EIS. Experiments verified the sensor’s accuracy, and the results showed that the sensor performed similarly to a bench-top EIS machine when we tested on circuit models. We utilized EIS to design a field deployable impedance-based corrosion sensor (FDICS), capable of performing in-situ EIS analysis. The purpose of this work is to reduce the size of the whole corrosion monitoring system. However, many conventional corrosion monitoring setups are bulky and inconvenient for in-situ testing. Electrochemical impedance spectroscopy (EIS) has been used in various applications, such as metal corrosion monitoring.
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