Relevant bibliographies by topics / Electrochemical Noise Measurement

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Electrochemical Noise Measurement'

Author: Grafiati
Published: 4 June 2021
Last updated: 26 January 2023

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Journal articles on the topic "Electrochemical Noise Measurement"

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Inoue, Hiroyuki. "A Grounding in Electrochemical Noise Measurement." Zairyo-to-Kankyo 52, no. 9 (2003): 444–51. http://dx.doi.org/10.3323/jcorr1991.52.444.

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Kim, Jong Jip, and Su Yeon Kang. "Uncertainty evaluation in electrochemical noise resistance measurement." Corrosion Science and Technology 12, no. 5 (2013): 220–26. http://dx.doi.org/10.14773/cst.2013.12.5.220.

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Karaoglu, Gozde, and Burak Ulgut. "(Digital Presentation) Electrochemical Noise Measurement in Batteries with Metallic Lithium Anode." ECS Meeting Abstracts MA2022-01, no. 1 (2022): 89. http://dx.doi.org/10.1149/ma2022-01189mtgabs.

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Electrochemical noise measurements are well known in corrosion literature where the noise that is to be measured is appreciable in amplitude. From the measured noise, it is possible to identify the mode of corrosion and distinguish between localized corrosion types from the uniform ones. This is mainly because localized modes of corrosion are stochastic in nature, typically studied in conjunction with post-mortem studies. In recent years, the increase in the use of batteries demands that the tests to be performed on the batteries are faster, easier, cheaper and, if possible, non-destructive and non-perturbing. Although some electrochemical noise studies have begun to be carried out on batteries, the literature on this subject is scarce and questionable. Electrochemical noise measurement of Li batteries can be ultimately used as a non-invasive tool to diagnose the battery health and we have already shown that non-rechargeable batteries with Li/MnO2 chemistry shows increase in voltage noise after being exposed to a short circuit. On the other hand, if the battery is properly discharged, voltage noise does not increase. As a result, morphological changes on metallic lithium can be detected by electrochemical noise measurements and this method can be used as non-invasive diagnosis tool.[1] Lithium metal-based chemistries have a much higher capacity than rechargeable chemistries because of the use of Lithium-aluminum alloy or graphite in rechargeable chemistries, as opposed to metallic Lithium used at the anode. It is known that charging of lithium metal electrode to result in the formation of lithium dendrites and/or mossy structures. These end up creating safety and performance issues. For this reason, pre-detection is both academically interesting and industrially important. Some preliminary studies show that noise level increase drastically after charging. Moreover, the anodes of the charged batteries were also examined with SEM and serious deterioration was observed in the anode of the battery after charging. (Figure 1) Just like noise measurements on non-rechargeable batteries with lithium chemistry exposed to short circuits, it is worthy to study on and develop pre-detection method for in lithium batteries that are prone to form dendrite during charging and discharging cycles by using electrochemical noise measurements. For this reason, we also conduct noise studies with symmetrical and asymmetric cells (Li/Li, Cu/Cu and Li/Cu) prepared in the glove box and examine the details of the noise increase in a controlled and detailed manner. In this talk, how the electrochemical noise of metallic lithium-based batteries is measured, under what conditions it increases and what are the sources of the noise will be discussed both with noise measurements and imaging with optical microscope in situ and after death with spectroscopic analysis. References [1] Karaoglu G; Uzundal CB; Ulgut B; “Uneven Discharge of Metallic Lithium Causes Increased Voltage Noise in Li/MnO2 Primary Batteries upon Shorting, submitted. Figure 1
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Astafev, Evgeny. "Electrochemical noise measurement methodologies of chemical power sources." Instrumentation Science & Technology 47, no. 3 (2018): 233–47. http://dx.doi.org/10.1080/10739149.2018.1521423.

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Mills, Douglas J., and Steve Mabbutt. "Electrochemical noise measurement for evaluating anti‐corrosive paints." Pigment & Resin Technology 27, no. 3 (1998): 168–72. http://dx.doi.org/10.1108/03699429810218684.

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de León, G. Miramontes, D. C. Farden, and D. E. Tallman. "Transient Analysis and Simulation of Pitting Corrosion for the Estimation of Noise Resistance." Corrosion 56, no. 9 (2000): 928–34. http://dx.doi.org/10.5006/1.3280596.

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Abstract A new approach for the measurement of noise resistance based on the transient behavior of pitting corrosion is presented. Potential noise and current transients have been recognized as a characteristic behavior of pitting corrosion. This new approach uses the transient information present during corrosion as a way to estimate the noise resistance of coated metals directly. Computer simulation and analytical results are presented, indicating that the new technique can be applied to the problem of noise resistance estimation. This new approach was applied to experimental electrochemical noise data obtained with commercial electrochemical impedance spectroscopy (EIS)/electrochemcial noise measurement (ENM) equipment.
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Curioni, Michele, Tullio Monetta, and Francesco Bellucci. "Modeling data acquisition during electrochemical noise measurements for corrosion studies." Corrosion Reviews 33, no. 3-4 (2015): 187–94. http://dx.doi.org/10.1515/corrrev-2014-0047.

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AbstractElectrochemical noise measurement and analysis enable one to obtain information on corroding systems without applying any potential or current perturbation to the corroding surface, and they are thereby nondestructive techniques, suitable for corrosion monitoring. The measurement process requires converting the analog potential or current signal in a digital dataset that can be used to perform mathematical operations with a variety of approaches. The analog-to-digital conversion is a critical step since, after the conversion has been performed, it is impossible to correct for artefacts that occurred during the conversion. Additionally, the electrochemical noise generated during corrosion is generally overlapped to the instrumental noise and to the electrical interference that are present in the environment where the measurement is performed. In this work, the process of analog-to-digital conversion of electrochemical noise signals is analyzed in detail by simulating the conversion of a representative simulated noise signal. With this approach, the possible issues arising from the analog-to-digital conversion process are highlighted and the key features arising from instrumental noise, aliasing, and electrical interference are identified.
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FUKUYAMA, Tomoko, Hironori NAGAI, and Takafumi NOGUCHI. "CORROSION MONITORING OF REINFORCING BARS BY ELECTROCHEMICAL NOISE MEASUREMENT." Journal of Structural and Construction Engineering (Transactions of AIJ) 75, no. 657 (2010): 1955–64. http://dx.doi.org/10.3130/aijs.75.1955.

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Astafev, E. A. "Electrochemical noise measurement of a Li/SOCl2 primary battery." Journal of Solid State Electrochemistry 22, no. 11 (2018): 3569–77. http://dx.doi.org/10.1007/s10008-018-4067-z.

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Ritter, S., F. Huet, and R. A. Cottis. "Guideline for an assessment of electrochemical noise measurement devices." Materials and Corrosion 63, no. 4 (2010): 297–302. http://dx.doi.org/10.1002/maco.201005839.

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Dissertations / Theses on the topic "Electrochemical Noise Measurement"

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Lowe, Alexander M. "Estimation of electrochemical noise impedance and corrosion rates from electrochemical noise measurements." Thesis, Curtin University, 2002. http://hdl.handle.net/20.500.11937/209.

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Electrochemical noise refers to the spontaneous fluctuations in potential and current that can be observed on a corroding metal. The use of electrochemical noise for obtaining information on the corrosion process generates much interest in research fields. One important application is the measurement of corrosion rate. This can be achieved using the electrochemical noise of a pair of electrically coupled corroding metals to obtain an estimate of electrochemical impedance - an abstract quantity that reflects various aspects of the corrosion process.There are a number of problems associated with estimation of impedance information from the electrochemical noise data, particularly regarding data pre-treatment, accuracy and precision. In addition, the present methods are incomplete: current literature does not offer information regarding the phase of the impedance; and assumptions regarding symmetry of an electrode pair cannot be tested without additional measurements.The thesis addresses the above mentioned problems. Specifically,analysis of the impedance estimation process is given to determine how precision can be affected by various factors;a novel signal processing technique is described that is shown to yield a local optimum precision;the application of the proposed signal processing to time varying systems is demonstrated by use of a time varying, frequency dependent impedance estimate;a technique for recovering phase information, given certain conditions, is suggested so that Nyquist impedance diagrams can be constructed; anda technique for testing the symmetry of a coupled pair of corroding metals is described.An integral part of electrochemical noise analysis is the software used for numerical computation. The Matlab package from MathWorks inc. provides an extensible platform for electrochemical noise analysis. Matlab code is provided in Appendix A to implement much of the theory discussed in the thesis.Impedance analysis and many other electrochemical corrosion monitoring techniques are primarily used for uniform corrosion, where the corrosion patterns occur uniformly over the exposed surface. In order to map localised corrosion, where the corrosion is typically concentrated within a small area, a wire beam electrode can be used. A wire beam electrode is a surface that is divided into a matrix of mini-electrodes so that the corrosion rate at different points can be monitored. However, manual connection of each mini-electrode to the measurement device can prove cumbersome. The final chapter of this thesis describes the design and testing of specialised multiplexing hardware to automate the process.In general, the thesis shows that by careful conditioning of the electrochemical noise prior to analysis, many of the problems with the technique of impedance estimation from the electrochemical noise data can be overcome. It is shown that the electrochemical noise impedance estimation can be extended to encompass a time varying, frequency dependent quantity for studying dynamic systems; that phase information can be recovered from electrochemical noise for the purpose of constructing Nyquist impedance diagrams; and that asymmetric electrodes can be detected without requiring additional measurements.
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Lowe, Alexander M. "Estimation of electrochemical noise impedance and corrosion rates from electrochemical noise measurements." Curtin University of Technology, School of Electrical and Computer Engineering, 2002. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=12723.

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Electrochemical noise refers to the spontaneous fluctuations in potential and current that can be observed on a corroding metal. The use of electrochemical noise for obtaining information on the corrosion process generates much interest in research fields. One important application is the measurement of corrosion rate. This can be achieved using the electrochemical noise of a pair of electrically coupled corroding metals to obtain an estimate of electrochemical impedance - an abstract quantity that reflects various aspects of the corrosion process.There are a number of problems associated with estimation of impedance information from the electrochemical noise data, particularly regarding data pre-treatment, accuracy and precision. In addition, the present methods are incomplete: current literature does not offer information regarding the phase of the impedance; and assumptions regarding symmetry of an electrode pair cannot be tested without additional measurements.The thesis addresses the above mentioned problems. Specifically,analysis of the impedance estimation process is given to determine how precision can be affected by various factors;a novel signal processing technique is described that is shown to yield a local optimum precision;the application of the proposed signal processing to time varying systems is demonstrated by use of a time varying, frequency dependent impedance estimate;a technique for recovering phase information, given certain conditions, is suggested so that Nyquist impedance diagrams can be constructed; anda technique for testing the symmetry of a coupled pair of corroding metals is described.An integral part of electrochemical noise analysis is the software used for numerical computation. The Matlab package from MathWorks inc. provides an extensible platform for electrochemical noise analysis. Matlab code is provided in Appendix A to implement ++<br>much of the theory discussed in the thesis.Impedance analysis and many other electrochemical corrosion monitoring techniques are primarily used for uniform corrosion, where the corrosion patterns occur uniformly over the exposed surface. In order to map localised corrosion, where the corrosion is typically concentrated within a small area, a wire beam electrode can be used. A wire beam electrode is a surface that is divided into a matrix of mini-electrodes so that the corrosion rate at different points can be monitored. However, manual connection of each mini-electrode to the measurement device can prove cumbersome. The final chapter of this thesis describes the design and testing of specialised multiplexing hardware to automate the process.In general, the thesis shows that by careful conditioning of the electrochemical noise prior to analysis, many of the problems with the technique of impedance estimation from the electrochemical noise data can be overcome. It is shown that the electrochemical noise impedance estimation can be extended to encompass a time varying, frequency dependent quantity for studying dynamic systems; that phase information can be recovered from electrochemical noise for the purpose of constructing Nyquist impedance diagrams; and that asymmetric electrodes can be detected without requiring additional measurements.
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Bagley, Gillian. "The measurement and the analysis of electrochemical noise." Thesis, University of Manchester, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.488277.

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Deva, Yashika Poorvi. "Slug flow induced corrosion studies using electrochemical noise measurements." Ohio : Ohio University, 1995. http://www.ohiolink.edu/etd/view.cgi?ohiou1179513355.

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Wain, Leonie Alison, and n/a. "Investigating the condition of organic coatings on metals: electrochemical evaluation techniques in a conservation context." University of Canberra. Resources, Environmental & Heritage Sciences, 2002. http://erl.canberra.edu.au./public/adt-AUC20050726.144111.

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Electrochemical techniques have potential for use in conservation, both to evaluate the protectiveness of existing coatings on metal artefacts and to evaluate potential new conservation coatings. Three electrochemical methods have been examined in this study for their applicability to conservation problems. Corrosion Potential Measurement is simple but provides only minimal information on the corrosion processes occurring in an electrochemical system. Electrochemical Impedance Spectroscopy provides both mechanistic and predictive information on coating performance, but the data are complex to interpret and measurements require equipment that is at present too bulky for effective on-site use and beyond the budget of most conservation laboratories. Electrochemical Noise Measurement can be performed using cheap, portable instrumentation and theoretically requires relatively simple statistical processing and interpretation, making it attractive for conservation applications. This project looks at the development of a simple, low cost electrochemical noise measurement system for conservation needs, and uses it to compare Electrochemical Noise Measurement with the other two techniques.
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Safizadeh, Fariba. "Monitoring deposit properties and passivation of impure copper anodes by electrochemical noise measurements." Thesis, Université Laval, 2011. http://www.theses.ulaval.ca/2011/28449/28449.pdf.

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"Corrosion of Carbon Steel Under Disbonded Coatings in Acidified Leaching Processes." Thesis, 2015. http://hdl.handle.net/10388/ETD-2015-05-2060.

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In this research, corrosion behaviour of A36 carbon steel under engineered disbonded coating was investigated in sulphuric acid solutions containing sodium chloride and iron (III) sulphate. Scanning electron microscopy (SEM) and x-ray diffraction (XRD) analyses were carried out to study the morphology and phase composition of corrosion products formed on the carbon steel surface. The results of the SEM analysis showed that only general and pitting corrosion occurred on the carbon steel surface with the engineered crevice. The size of the pits increased as the sulphuric acid and sodium chloride concentrations increased. Moreover, the corrosion products had an open, irregular and loose structure at the pits mouth. The loose and open structure of the corrosion products facilitates diffusion of chloride ions, oxygen, water and contaminants into the carbon steel surface. In contrast, the corrosion products had a very compact and continuous structure outside the pits which provided a good protection against further corrosion. The x-ray diffraction analysis showed that the corrosion products layer mainly consisted of lepidocrocite (γ-FeOOH), goethite (α-FeOOH) and iron sulphide (FeS) on the crevice edges. The Pourbaix diagram of iron in sulphuric acid solution at room temperature indicates that iron sulphide is formed on the metal surface at different pH values. The akaganeite (β-FeOOH) diffraction peak was not identified in any spectrum which could be due to the low concentration of chloride ions in the solutions. Furthermore, the number of lepidocrocite peaks decreased as the sulphuric acid concentration increased from 10 g l-1 to 50 g l-1. The lepidocrocite is dissolved in the presence of sulphuric acid, and the dissolved ion acts as an oxidant to the metal and hence lower lepidocrocite peaks are identified. Electrochemical noise measurement (ECN) testing was also performed to investigate the corrosion process occurring on the carbon steel surface with the engineered crevice. The results of the ECN measurements showed that current increased during first few minutes and then decreased slightly. Also, the coupled potential did not change after an initial shift in negative direction. The low current flowing through the carbon steel electrodes and the constant potential showed that the crevice corrosion did not develop. These results imply that the crevice corrosion may not occur on the carbon steel surface in acidic solutions containing chloride ions.
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Books on the topic "Electrochemical Noise Measurement"

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1956-, Kearns Jeffery R., ASTM Committee G-1 on Corrosion of Metals., and International Symposium on Electrochemical Noise Measurement for Corrosion Applications (1st : 1994 : Montréal, Québec), eds. Electrochemical noise measurement for corrosion applications. ASTM, 1996.

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Kearns, JR, JR Scully, PR Roberge, DL Reichert, and JL Dawson, eds. Electrochemical Noise Measurement for Corrosion Applications. ASTM International, 1996. http://dx.doi.org/10.1520/stp1277-eb.

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Karrab, Salem Ali. Identification of localized corrosion using electrochemical noise measurement. UMIST, 1998.

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Florian, Mansfeld, Huet F, Mattos O. R, and Electrochemical Society Corrosion Division, eds. New trends in electrochemical impedance spectroscopy (EIS) and electrochemical noise analysis (ENA): Proceedings of the international symposium. The Electrochemical Society, Inc., 2001.

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Book chapters on the topic "Electrochemical Noise Measurement"

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Eden, D. A., M. Hoffman, and B. S. Skerry. "Application of Electrochemical Noise Measurements to Coated Systems." In Polymeric Materials for Corrosion Control. American Chemical Society, 1986. http://dx.doi.org/10.1021/bk-1986-0322.ch004.

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Twite, R. L., and Gordon P. Bierwagen. "Defect Area Calculated from Electrochemical Noise and Impedance Measurements." In ACS Symposium Series. American Chemical Society, 1998. http://dx.doi.org/10.1021/bk-1998-0689.ch025.

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Arganis-Juarez, Carlos, José Malo, and J. Uruchurtu. "5 Electrochemical noise measurements of stainless steel in high-temperature water*." In Corrosion monitoring in nuclear systems: research and applications. CRC Press, 2017. http://dx.doi.org/10.1201/9781315140391-6.

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Macák, Jan, Petr Sajdl, Pavel era, Jan Vošta, and Radek Novotný. "7 In-situ electrochemical impedance and noise measurements of corroding stainless steel in high-temperature water*." In Corrosion monitoring in nuclear systems: research and applications. CRC Press, 2017. http://dx.doi.org/10.1201/9781315140391-8.

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Ritter and Hans-Peter Seifert. "4 Detection of stress corrosion cracking in a simulated BWR environment by combined electrochemical potential noise and direct current potential drop measurements." In Corrosion monitoring in nuclear systems: research and applications. CRC Press, 2017. http://dx.doi.org/10.1201/9781315140391-5.

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Mills, D. J., and S. Mabbutt. "Electrochemical Noise Measurement in the Study of Surface Coatings." In Organic and Inorganic Coatings for Corrosion Prevention – Research and Experiences. CRC Press, 2019. http://dx.doi.org/10.1201/9780367814113-7.

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"Electrochemical Studies of Green Corrosion Inhibitors." In Theory and Applications of Green Corrosion Inhibitors. Materials Research Forum LLC, 2021. http://dx.doi.org/10.21741/9781644901052-4.

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Corrosion of macro to micro-structures has been one of the major causes of structural failure in modern era. Their early detection could assist in limiting their repairs and reducing the associated cost as well. This chapter focusses on the state-of-the-art and development made with green corrosion inhibitors for preventing corrosion. It mainly includes the most recent progress in electrochemical corrosion monitoring techniques for various green inhibitors namely polarization technique, electrochemical impedance spectroscopy, electrochemical noise measurement and electrochemical quartz crystal microbalance techniques. Finally, we conclude with the current progress, limitations and remedies in the recent trends and advancement of green corrosion inhibitors for corrosion prevention.
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Leban, M., ⅽ. Bajt, J. Kovač, and A. Legat. "Detection of SCC by the simultaneous use of electrochemical noise and acoustic emission measurements." In Environment-Induced Cracking of Materials. Elsevier, 2008. http://dx.doi.org/10.1016/b978-008044635-6.50081-9.

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Conference papers on the topic "Electrochemical Noise Measurement"

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Janusz Smulko. "Novel Method of Local Corrosion Events Characterization by Electrochemical Noise Analysis." In 2006 IEEE Instrumentation and Measurement Technology. IEEE, 2006. http://dx.doi.org/10.1109/imtc.2006.235822.

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Smulko, Janusz. "Novel Method of Local Corrosion Events Characterization by Electrochemical Noise Analysis." In IEEE Instrumentation and Measurement Technology Conference. IEEE, 2006. http://dx.doi.org/10.1109/imtc.2006.328142.

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Mills, Douglas J., Joshua Zatland, and Nicola M. Everitt. "Experience Using Electrochemical Noise for Testing Green Corrosion Inhibitors." In SPE International Oilfield Corrosion Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/205475-ms.

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Abstract ‘Green’ corrosion inhibitors derived from plant materials provide environmentally friendly alternatives to conventional corrosion inhibitors. They are also much cheaper if using a biomass waste stream or abundant plant material as the source material. There are many examples in literature of different trials, from henna leaves to celery seeds to banana peel. Although it is known that extracts contain electron-rich polar atoms such as N, O, S and P which make them potentially effective inhibitors, it is difficult to predict on a molecular basis what will work well and what will not, since many interacting factors may be at play in complementary interactions. To assist in predicting the inhibition efficiency of inhibitors under varying conditions and choosing the most effective, what is needed is a short-term test which will obviate the need for tedious weight loss experiments. The Electrochemical Noise Method (ENM) uses the natural fluctuations which arise during electrochemical activity to gain information about the corrosion process. Using ENM is quick and non-intrusive method which makes it ideal for screening. Hence a rig has been designed and manufactured which allows for measurement to be made in stirred as well as static conditions and minimises the occurrence of crevice corrosion at the electrodes. Crevice corrosion is a hazard for ENM electrodes when trying to make a comparison with corrosion inhibition calculated using the standard weight loss measurement after immersion (WLM) method. For these preliminary trials we are exploring corrosion of mild steel in HCl in both stirred and unstirred conditions at room temperature. Results are presented comparing ENM measurements with conventional WLM for both Propargyl Alcohol (a conventional industrial corrosion inhibitor) and broccoli extract. Our results suggest that stirring does not make any difference to the noise measured in ENM. The amount of material lost calculated by ENM and WLM (Rn and weight loss values) can be directly compared and show close comparison. It seems likely that as a way of assessing inhibitors quickly (which is particularly important in the testing of "green" inhibitors) that this ENM approach has a lot to offer.
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Northcutt, Robert, Jacob Maddox, and Vishnu-Baba Sundaresan. "Electrode Fabrication for Scanning Electrochemical Microscopy and Shear Force Imaging." In ASME 2016 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/smasis2016-9155.

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The development of novel characterization techniques is critical for understanding the fundamentals of material systems. Bioinspired systems are regularly implemented but poorly defined through quantitative measurement. In an effort to specify the coupling between multiple domains seen in biologically inspired systems, high resolution measurement systems capable of simultaneously measuring various phenomena such as electrical, chemical, mechanical, or optical signals is required. Scanning electrochemical microscopy (SECM) and shear-force (SF) imaging are nanoscale measurement techniques which examine the electrochemical behavior at a liquid-solid or liquid-liquid interface and simultaneously probe morphological features. It is therefore a suitable measurement technique for understanding biological phenomena. SF imaging is a high resolution technique, allowing for nanoscale measurement of extensional actuation in materials with high signal to noise ratio. The sensing capabilities of SECM-SF techniques are dependent on the characteristics of the micro-scale electrodes (ultramicroelectrodes or UMEs) used to investigate surfaces. Current limitations to this technique are due to the fabrication process which introduces structural damping, reducing the signal produced. Additionally, despite the high cost of materials and processing, contemporary processes only produce a 10% yield. This article demonstrates a UME fabrication process with a 60% yield as well as improved amplitude (250% increase) and sensitivity (210% increase) during SF imaging. This process is expected to improve the signal to noise ratio of SF-based measurement systems. With these improvements, SECM-SF could become a more suitable technique for measuring cell or tissue activity, corrosion of materials, or coupled mechanics of synthetic faradaic materials.
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Chang, Hyun Young, Heung Bae Park, Young Sik Kim, and Yoon Young Jang. "Development of In-Situ Monitoring Technique on a Crack of Steam Generator Tubing: The Effect of Thermal Treatment on the SCC of Alloy 600." In ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/pvp2010-25569.

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TT (Thermal Treatment) for mill annealed Alloy 600 highly improves the resistance against IGSCC (Intergranular Stress Corrosion Cracking) in caustic solution, but its treatment changes the microstructure. The change of microstructure can affect the SCC resistance in various corrosion environments. This kind of corrosion can be monitored using an electrochemical noise measurement. Therefore, in this study, the effects of heat treatment on SCC resistance in Alloy 600 have been evaluated 0.1M Na2S4O6 at 25 °C from electrochemical noise measurement, and quantification has been tried for resistance against crack formation. While there was no generation of the stress corrosion crack of Alloy 600MA by reverse U-bend method in 0.1M Na2S4O6, the stress corrosion crack was generated in sensitized Alloy 600SE, SE+, and TT materials. The cracking could be detected using an electrochemical noise monitoring. Also, if the aging heat treatment is performed, the stress corrosion crack resistance is reduced. In the case of this behavior, it is analyzed that the stress corrosion crack resistance is closely related with the grain boundary corrosion rate based on the results of the micro-structural analysis for the chromium carbide distribution, the DL-EPR method, and the measuring of the grain boundary corrosion rate through the modified Huey test.
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Zhao, Shi, Adrien M. Bizeray, Stephen R. Duncan, and David A. Howey. "Performance Evaluation of an Extended Kalman Filter for State Estimation of a Pseudo-2D Thermal-Electrochemical Lithium-Ion Battery Model." In ASME 2015 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/dscc2015-9836.

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Fast and accurate state estimation is one of the major challenges for designing an advanced battery management system based on high-fidelity physics-based model. This paper evaluates the performance of a modified extended Kalman filter (EKF) for on-line state estimation of a pseudo-2D thermal-electrochemical model of a lithium-ion battery under a highly dynamic load with 16C peak current. The EKF estimation on the full model is shown to be significantly more accurate (&lt; 1% error on SOC) than that on the single-particle model (10% error on SOC). The efficiency of the EKF can be improved by reducing the order of the discretised model while maintaining a high level of accuracy. It is also shown that low noise level in the voltage measurement is critical for accurate state estimation.
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Zhou, Xin, Jeffrey L. Stein, and Tulga Ersal. "Battery State of Health Monitoring by Estimation of the Number of Cyclable Li-Ions." In ASME 2016 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/dscc2016-9730.

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This paper introduces a method to monitor battery state of health (SOH) by estimating the number of cyclable Li-ions, a health-relevant electrochemical variable. SOH monitoring is critical to battery management in particular for balancing the trade-off between maximizing system performance and minimizing battery degradation. However, SOH-related electrochemical variables cannot be directly measured non-invasively. Hence, estimation algorithms are needed to track those variables non-destructively while the battery is in use. In this paper, the extended Kalman filter (EKF) is used to estimate the number of cyclable Li-ions as an unknown battery parameter. Simulations are performed using an example parameter set for a hybrid-electric-vehicle battery whose cathode material is LiMn2O4 mixed with other Li-compounds to obtain estimation results under a typical electric vehicle current profile that consists of a 1 C constant current charge mode and a discharge current profile for an electric vehicle subject to the Urban Dynamometer Driving Schedule cycle. The simulations show promising results in estimation of the number of cyclable Li-ions using the EKF under the ideal conditions. Next, robustness of the algorithm under non-ideal conditions (i.e., with SOC estimation error, modeling error, and measurement noise) is analyzed, and it is shown that estimation of the number of cyclable Li-ions using the EKF preserves high accuracy even under these non-ideal conditions. The proposed estimation technique for the number of cyclable Li-ions can also be applied to other parameter sets and batteries with other cathode materials to monitor the SOH change resulting from any degradation mechanism that consumes cyclable Li-ions.
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Men, Hong, Yan Peng, Jing Zhang, Shanrang Yang, and Zhiming Xu. "Study on Biocorrosion Induced by Sulfate-Reducing Bacteria on Heat Exchanger Material in Cooling Water." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22747.

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Corrosion associated with microorganisms has been recognized for over 50 years and yet the study of microbiologically influenced corrosion (MIC) is relatively new. MIC can occur in diverse environments. Industrial cooling water from rivers, lakes and sea water contain lots of microorganisms which are able to grow and multiply under certain conditions when pH, water temperature and sunlight etc are suitable. MIC is one of key cause of heat exchanger faults. MIC of heat exchanger materials in cooling waters has caused expensive unplanned outages, the need for local repairs and, in some cases, completes system replacement. Sulfate-reducing bacteria (SRB) are the main harmful bacteria in circulating cooling water. Under anaerobic conditions, SRB reproduce a lot to produce mucus, which speed up the formation of corrosion, erode the metal equipment, plug the pipeline, affect the efficiency of heat transfer, and bring a lot of inconvenience to the production. The corrosion behaviors of 304 stainless steel induced by SRB were studied by measuring the polarization curves, electrochemical impedance Spectrum, weight loss measurements of fore-and-aft biocorrosion, and electrochemical noise method. The electrochemical noise signal of 304 stainless steel corrosion were de-noised by using a wavelet threshold de-noising method, which made the quadratic biorthogonal spline wavelet as the mother wavelet and adopted an soft threshold processing function. The result showed that the slope of cathodic polarization curves measured included with SRB is lower than the one obtained without SRB, while the slope of anodic polarization curves is higher than it. It is concluded that the process of anode polarization was repressed at the presence of SRB. With the growth of the culture time, the value of electrochemical impedance without bacteria reduced at first, then rose, while with bacteria fell at all times. It indicated that SRB accelerated the corrosion of stainless steel. With the dipping time, a biofilm, under which corrosion products congregate to form local battery corrosion, was formed on the surface of stainless steel, so that the serious pitting corrosion is induced. The results from electrochemical noise method showed that the quadratic biorthogonal spline wavelet much smoother and it can remove the noise from the electrochemical noise effectively, and can effectively identify the location of the sudden changes in the signal and accurately reflect the useful information of the signal. The more useful information and data about biocorrosion induced by SRB are also gotten.
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9

Sheng, Hu, Nikita Zaveri, YangQuan Chen, and Anhong Zhou. "Analysis of Electrochemical Noise (ECN) of TiO2 Nanoparticles Coated Ti-6Al-4V in Simulated Biofluids Using Fractional Order Signal Processing (FOSP) Techniques." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-86870.

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The electrochemical noise (ECN) measurements were conducted and used to assess the corrosion behaviors of the bare and TiO2 nanoparticles coated Ti-6Al-4V bioimplants exposed to three simulated biofluid solutions: 1) NaCl solution; 2) Hank’s solution; and 3) Cigada solution. The ECN data for bioimplants in these solutions were assessed by signal analysis techniques in both the time and frequency domains. In time domain analysis, the parameters including skewness, kurtosis, and noise resistance (Rn) were calculated. In frequency domain analysis, we introduced Fractional Order Signal Processing (FOSP) techniques to process the ECN data. Our results suggested that FOSP may provide a better signal analysis tool to evaluate the ECN signals than the conventional fast Fourier transforms (FFT) processing method.
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Khobaib, Mohammad, Jochen Hoffmann, Shamachary Sathish, and Michael S. Donley. "Study of Corrosion Damage Under Protective Coatings." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/nde-25818.

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Abstract Polymer coatings provide an excellent corrosion barrier for Al-skinned military aircraft. However, the degradation and damage of the coatings in their service life over time leads to the initiation of corrosion damage at the substrate level. Early detection and negation of such activity can provide extensive cost savings. Several Electrochemical techniques and Non Destructive Evaluation (NDE) show promise in detecting the onset of corrosion under such coatings. Current accelerated testing of aircraft coating systems for corrosion protection relies heavily on salt spray methods. Electrochemical techniques such as Electrochemical Impedance Spectroscopy (EIS) and Electrochemical Noise Methods (ENM) provide insight into the global properties of a coating system, and both techniques are being used on a limited basis. However, there is a need to investigate corrosion events with greater spatial resolution under coatings at the metal/coating interface. Such corrosion activity may be related to coating defects and variations in the surface chemistry of the underlying metal. The Scanning Vibrating Electrode Technique (SVET) has been developed to allow the investigation of localized corrosion activity with high spatial resolution. Such activity may be associated with coating defects or galvanic coupled regions of the metal surface. Electrochemical and NDE techniques were used to investigate the early stage of corrosion activity under protective coatings. Coatings in this investigation ranged from a simple epoxy amine to commercially used military aircraft polyurethane coatings. SVET testing of panels with intact high-resistance barrier coatings could not reveal corrosion damage under normal testing conditions because of little or no corrosion activity within the limited exposure time. Chemical, mechanical, and electrochemical means of accelerating the corrosion damage were utilized to obtain results in a reasonable time frame. Corrosion initiation and its progress under the coating were studied in detail and the results are discussed here. Complimentary high-resolution NDE techniques, such as Scanning Acoustic Microscopy (SAM) and Fan Thermography measurements were used to identify the corrosion sites. The overall objective of this investigation is to establish a correlation between the electrochemical and NDE techniques.
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