Corrosion monitoring at the interface using sensors and advanced sensing materials: methods, challenges and opportunities

Rajendran, Vinooth; Prathuru, Anil; Fernandez, Carlos; Faisal, Nadimul Haque

doi:10.1080/1478422x.2023.2180195

Cited by 6 publications

(2 citation statements)

References 247 publications

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“…This could be correlated with the observed trend in this work. We note that almost all of reported studies on the effects of annealing on ITO films were conducted at temperatures below 600°C [53]. Further, these works focus on the optical properties of ITO films, in the visible region (400-700nm).…”

Section: Thz Optical and Electrical Propertiesmentioning

confidence: 99%

Characterization of Indium Tin Oxide (ITO) Thin Films Towards Terahertz (THz) Functional Device Applications

Sahoo,

Au,

Pan

2024

Preprint

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In this study, we explored terahertz (THz) optical properties of the as-deposited and rapid thermal annealing (RTA) at 400°C, 600°C and 800°C of indium-tin-oxide (ITO) thin-films sputtered on high-resistivity silicon (HR-Si) substrate. We further investigated THz frequency dependence complex refractive indices and conductivity of those as-prepared and annealed ITO thin films. We note the transmittance enhanced from 27 % to 39 % for ITO thin film treated with RTA at 800°C while the real part of conductivity improved from 1019 Ω-1∙cm-1 to 4881 Ω-1∙cm-1 for ITO thin film treated with RTA at 600°C in the frequency range of 0.2 to 1 THz. The mobility, carrier concentration, plasma frequency and relaxation time of those sample were also deduced by fitting the experimental results with the Drude-Smith model. For example, the mobility of 29 cm2/V∙s, 110 cm2/V∙s, 226 cm2/V∙s and 70 cm2/V∙s, respectively is deduced for as-deposited, RTA at 400°C, RTA at 600°C and 800°C of ITO thin-films. In addition, the optical bandgap of those ITO thin films were evaluated with a typical Tauc plot showing extrapolation of photon energy spectrum. The transmittance, absorption coefficient and complex refractive indices of those ITO thin films were extracted by Swanepoel method using experimental transmittance and reflectance spectrum throughout the wavelength range from 400 to 1000 nm. Moreover, as expected, the transmittance of the ITO thin film treated with RTA at 800°C is improved at the wavelength of the visible light spectrum. We also displayed the surface morphology, microscopic structural properties and typical chemical composition of as-deposited and RTA at 400°C, RTA at 600°C and 800°C of ITO thin-films. We strongly believed the present study will lead to further enhancement for THz optoelectronics applications.

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Section: Thz Optical and Electrical Propertiesmentioning

confidence: 99%

Characterization of Indium Tin Oxide (ITO) Thin Films Towards Terahertz (THz) Functional Device Applications

Sahoo,

Au,

Pan

2024

Preprint

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“…In particular, electrochemical impedance spectroscopy (EIS) and electrochemical noise (EN) have been reported as some of the most promising in situ electrochemical methods with the potential to be extended to other industrial sectors and their development was rapid in recent years with the advancements in instrumentation and signal processing [21]. One advantage of EN is its application in long-term or early-stage corrosion process monitoring because it instantly detects corrosion rate and corrosion forms [22].…”

Section: Introductionmentioning

confidence: 99%

Advanced EIS-Based Sensor for Online Corrosion and Scaling Monitoring in Pipelines of Geothermal Power Plants

Freire,

Ezpeleta,

Sánchez

et al. 2024

Metals

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Corrosion and scaling in metal pipelines are the major issues in the exploitation of geothermal sources. Geothermal fluids are complex mixtures consisting of dissolved gases and high-salinity solutions. This creates very aggressive environments primarily due to the high concentrations of carbon dioxide (CO2), hydrogen sulfide (H2S), chlorides, and other chemical species. Besides, the high temperature of the brines also increases corrosion rates, which can lead to failures related to stress and fatigue corrosion. On the other hand, reinjection of cooled brine exiting the heat exchanger favors the onset of scaling, since the chemicals dissolved in geothermal waters may tend to precipitate promoting inorganic depositions on the casing. Corrosion and scaling phenomena are difficult to detect visually or monitor continuously. Standard techniques based on pH, temperature pressure, electrical resistance measurements, chemistry composition, and physical properties are habitually applied as indirect methods for corrosion rate control. These methods, however, lack enough robustness for accurate and reliable measuring of the corrosion behavior of materials. To address this issue, a novel system has been proposed for the continuous monitoring of corrosion degradation caused by the effect of the geothermal brines. The present work aims to design, develop, and validate a dedicated electrochemical-based test system for online and onsite monitoring of the corrosion rate and scaling growth occurring on different materials exposed to real operating conditions. This system uses non-standard methods based on electrochemical impedance spectroscopy (EIS) to obtain quantitative data related to the material quality. It can be used to track the condition of the pipeline, reducing the operation and maintenance (O&M) costs and shutdown times. By providing early corrosion rate data, this system allows the prediction of failures in critical units of the plant.

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Long-Term Effectiveness of Electrochemical Realkalization in Repairing Chloride-Induced Corrosion in Reinforced Concrete Structures

Moropane

2024

RILEM Bookseries

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Corrosion monitoring at the interface using sensors and advanced sensing materials: methods, challenges and opportunities

Cited by 6 publications

References 247 publications

Characterization of Indium Tin Oxide (ITO) Thin Films Towards Terahertz (THz) Functional Device Applications

Characterization of Indium Tin Oxide (ITO) Thin Films Towards Terahertz (THz) Functional Device Applications

Advanced EIS-Based Sensor for Online Corrosion and Scaling Monitoring in Pipelines of Geothermal Power Plants

Long-Term Effectiveness of Electrochemical Realkalization in Repairing Chloride-Induced Corrosion in Reinforced Concrete Structures

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