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    <publishedYear>2026</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>13</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>522</volume>
    <type>article</type>
    <publisherName>Elsevier B.V.</publisherName>
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    <title language="eng">Influence of the BF3·O(C2H5)2 on the corrosion resistance of hybrid silica sol-gel coatings deposited on flash-PEO-treated Mg alloy</title>
    <abstract language="eng">Achieving highly cross-linked sol-gel coatings to provide effective corrosion protection of Mg alloys remains a challenging task. The aim of this work is to evaluate the effect boron trifluoride diethyl etherate (BF3·O(C2H5)2) as catalyst to epoxy group in a GPTMS/TEOS/SiO2 sol and assesses its effect on the structure and corrosion resistance properties of Flash-PEO coated pre-treated Mg alloy. 29Si MAS NMR and 13C CPMAS-NMR demonstrated that (BF3·O(C2H5)2) efficiently promotes the epoxy polymerization of the GPTMS and the formation of a hybrid silica network. However, the amount of (BF3·O(C2H5)2) should be optimized to minimize the formation of undesirable byproducts such as ethyl ether terminal units. Therefore, GPTMS/TEOS/SiO2 sols containing different amounts of (BF3·O(C2H5)2) were synthesized and deposited onto the Flash-PEO coated Mg alloy, leading to bilayer systems with a total thickness of ⁓8 μm. The corrosion behavior of the bilayer coatings in 3.5 wt% NaCl solution was evaluated by electrochemical impedance spectroscopy (EIS) and Scanning Kelvin probe microscope (SKPFM). The results revealed that the barrier properties of the coatings with enhanced cross-linked structure showed impedance modulus (│Z│f:0.1 Hz) approximately four orders of magnitude higher than the bare magnesium alloy and two orders of magnitude higher than the F-PEO coated sample. A suitable compromise between (BF3·O(C2H5)2) amount and sol-gel film structure is required to obtain a more durable barrier coating capable to extend the protective lifespan of the magnesium alloy.</abstract>
    <parentTitle language="eng">Surface and Coatings Technology</parentTitle>
    <identifier type="issn">0257-8972</identifier>
    <identifier type="doi">10.1016/j.surfcoat.2025.133055</identifier>
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    <author>E. Merino</author>
    <author>S. Cere</author>
    <author>Özlem Özcan Sandikcioglu</author>
    <author>Matthias Dimper</author>
    <author>I. Sobrados</author>
    <author>A. Durán</author>
    <author>Y. Castro</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Sol-gel</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Corrosion</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>AZ31B Mg alloy</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Chemical structure</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>SKPFM</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="institutes" number="">6 Materialchemie</collection>
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  <doc>
    <id>64549</id>
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    <publishedYear>2025</publishedYear>
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    <language>eng</language>
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    <title language="eng">Polyoxometalate Ionic Liquids as Protective Coatings for Industrial Infrastructure and Cultural Heritage against Microbiologically Influenced Corrosion (MIC)</title>
    <abstract language="eng">Corrosion of stone and metal due to acid rain and biodeterioration poses significant challenges for industrial and residential infrastructure, as well as cultural heritage, including statues and historical artefacts. A promising mitigation strategy involves thin, transparent films of polyoxometalate-based ionic liquids (POM-ILs) as chemical shields. Stone samples coated with acid-resistant, biocidal POM-ILs exhibited negligible corrosion when exposed to simulated acid rain, in stark contrast to the severe deterioration of unprotected samples. Additionally, their biocidal properties effectively prevent biofilm formation on coated surfaces. Following studies successfully explored the effectiveness of the coating against lampenflora growing in the Pommery Champagne cellar; and the long-term performance of POM-ILs under outdoor environmental conditions. So, POM-ILs have already demonstrated remarkable anticorrosion and antimicrobial properties against aerobic microorganisms and, being water-insoluble, do not leach into aquatic ecosystem. The current research project repurposes the POM-ILs, extending their application to metals, specifically targeting microbiologically influenced corrosion (MIC) in cultural heritage artefacts made of brass, carbon steel, cast iron, and bronze. This involves optimizing nanocoating adhesion to the metal surface and evaluating its protective efficacy against MIC caused by anaerobic microorganisms such as methanogenic archaea and sulfate reducing bacteria (SRB). This presentation will highlight POM-ILs as sustainable, high-performance nanocoatings for biocorrosion mitigation. It will showcase published success stories, discuss ongoing research and proof-of-concept results, and explore future prospects for these advanced materials in safeguarding metal infrastructure and artefacts across different industrial sectors as well as in the context of cultural heritage conservation.</abstract>
    <enrichment key="eventName">Euro-MIC COST Action - Closing Workshop  Conference</enrichment>
    <enrichment key="eventPlace">Horsens, Denmark</enrichment>
    <enrichment key="eventStart">17.09.2025</enrichment>
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    <author>Archismita Misra</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polyoxometalates</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Corrosion</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Microbiologically Influenced Corrosion</value>
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      <language>eng</language>
      <type>uncontrolled</type>
      <value>Ionic Liquid</value>
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    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="ddc" number="628">Sanitär- und Kommunaltechnik; Umwelttechnik</collection>
    <collection role="institutes" number="">4 Material und Umwelt</collection>
    <collection role="institutes" number="">4.1 Biologische Materialschädigung und Referenzorganismen</collection>
    <collection role="institutes" number="">4.5 Kunst- und Kulturgutanalyse</collection>
    <collection role="institutes" number="">6 Materialchemie</collection>
    <collection role="institutes" number="">6.5 Synthese und Streuverfahren nanostrukturierter Materialien</collection>
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  </doc>
  <doc>
    <id>64548</id>
    <completedYear/>
    <publishedYear>2025</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
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    <title language="eng">Polyoxometalate Ionic Liquids as Protective Coatings for Industrial Infrastructure and Cultural Heritage against Microbiologically Influenced Corrosion (MIC)</title>
    <abstract language="eng">Corrosion of stone and metal due to acid rain and biodeterioration poses significant challenges for industrial and residential infrastructure, as well as cultural heritage, including statues and historical artefacts. A promising mitigation strategy involves thin, transparent films of polyoxometalate-based ionic liquids (POM-ILs) as chemical shields. Stone samples coated with acid-resistant, biocidal POM-ILs exhibited negligible corrosion when exposed to simulated acid rain, in stark contrast to the severe deterioration of unprotected samples. Additionally, their biocidal properties effectively prevent biofilm formation on coated surfaces. Following studies successfully explored the effectiveness of the coating against lampenflora growing in the Pommery Champagne cellar; and the long-term performance of POM-ILs under outdoor environmental conditions. So, POM-ILs have already demonstrated remarkable anticorrosion and antimicrobial properties against aerobic microorganisms and, being water-insoluble, do not leach into aquatic ecosystem. The current research project repurposes the POM-ILs, extending their application to metals, specifically targeting microbiologically influenced corrosion (MIC) in cultural heritage artefacts made of brass, carbon steel, cast iron, and bronze. This involves optimizing nanocoating adhesion to the metal surface and evaluating its protective efficacy against MIC caused by anaerobic microorganisms such as methanogenic archaea and sulfate reducing bacteria (SRB). This presentation will highlight POM-ILs as sustainable, high-performance nanocoatings for biocorrosion mitigation. It will showcase published success stories, discuss ongoing research and proof-of-concept results, and explore future prospects for these advanced materials in safeguarding metal infrastructure and artefacts across different industrial sectors as well as in the context of cultural heritage conservation.</abstract>
    <enrichment key="eventName">10th International symposium on applied microbiology and molecular biology in oil systems (ISMOS10)</enrichment>
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    <enrichment key="eventStart">11.08.2025</enrichment>
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    <author>Archismita Misra</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polyoxometalates</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Corrosion</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Microbiologically Influenced Corrosion</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Ionic Liquid</value>
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    <collection role="institutes" number="">4 Material und Umwelt</collection>
    <collection role="institutes" number="">4.1 Biologische Materialschädigung und Referenzorganismen</collection>
    <collection role="institutes" number="">4.5 Kunst- und Kulturgutanalyse</collection>
    <collection role="institutes" number="">6 Materialchemie</collection>
    <collection role="institutes" number="">6.5 Synthese und Streuverfahren nanostrukturierter Materialien</collection>
    <collection role="themenfelder" number="">Umwelt</collection>
    <collection role="themenfelder" number="">Material</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
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  </doc>
  <doc>
    <id>63528</id>
    <completedYear/>
    <publishedYear>2025</publishedYear>
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    <language>eng</language>
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    <title language="eng">Materials interactions in geothermal plants – not just an aspect of durability</title>
    <abstract language="eng">High alloyed corrosion resistant alloys are suitable for high saline geothermal fluids and do not cause copper or lead deposition. They shall be chosen for future design of the piping system, either in massive or in cladded form, if crevices formation with non-metallic materials can be prevented! Otherwise Ni-based alloys or Ti shall be selected.</abstract>
    <enrichment key="eventName">IFPEN Webinar "Corrosion in geothermal energy production"</enrichment>
    <enrichment key="eventPlace">Online meeting</enrichment>
    <enrichment key="eventStart">26.06.2025</enrichment>
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    <author>Ralph Bäßler</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Corrosion</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Geothermal</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Electrochemistry</value>
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    <collection role="ddc" number="624">Ingenieurbau</collection>
    <collection role="institutes" number="">6 Materialchemie</collection>
    <collection role="institutes" number="">6.2 Material- und Oberflächentechnologien</collection>
    <collection role="institutes" number="">7 Bauwerkssicherheit</collection>
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    <collection role="themenfelder" number="">Elektrische Energiespeicher und -umwandlung</collection>
    <collection role="themenfelder" number="">Infrastruktur</collection>
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  <doc>
    <id>62646</id>
    <completedYear/>
    <publishedYear>2024</publishedYear>
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    <language>eng</language>
    <pageFirst/>
    <pageLast/>
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    <title language="eng">State-of-the-art in map development: Best practices for application in nuclear materials</title>
    <abstract language="eng">Material Acceleration Platforms (MAPs) represent a transformative approach to the development of resilient and sustainable technology value chains. These platforms can identify candidate chemistries and structures via simulations, and database searches and leverage machine learning-based rapid screening to accelerate the discovery and deployment of novel materials, thereby addressing critical challenges in modern technology sectors.&#13;
Incorporating high-fidelity advanced characterization in the early phases of material development is crucial for early de-risking. Advanced characterization techniques, such as X-ray diffraction, advanced electrochemical and spectroscopic techniques provide comprehensive insights into the structural, chemical, and physical properties of materials. Long-term testing further contributes to the de-risking process by evaluating the durability and stability of materials under various environmental and operational conditions.&#13;
This presentation will briefly summarize how we address these issues at MAPs@BAM and provide deep-dives on best practices. As the demand for advanced materials continues to grow, MAPs will play an increasingly vital role in driving technological advancements and addressing global challenges.</abstract>
    <enrichment key="eventName">CONNECT-NM European Partnership Kick-off Meeting</enrichment>
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    <enrichment key="eventStart">02.10.2024</enrichment>
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    <author>Özlem Özcan Sandikcioglu</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>MAPs@BAM</value>
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    <subject>
      <language>eng</language>
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      <value>Corrosion</value>
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    <publishedYear>2024</publishedYear>
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    <title language="eng">High-throughput, automated and autonomous approaches for the design of corrosion resistant materials</title>
    <abstract language="eng">The integration of high-throughput electrochemistry, experimental automation and AI-driven processes is enabling the rapid discovery and optimization of advanced materials. This presentation will summarize our research in this field.</abstract>
    <enrichment key="eventName">GfKORR Grundlagen und Simulation Arbeitsgruppentreffen</enrichment>
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    <enrichment key="eventStart">04.07.2024</enrichment>
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    <author>Özlem Özcan Sandikcioglu</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>MAPs@BAM</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>CCMat</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Corrosion</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Electrochemistry</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="institutes" number="">6 Materialchemie</collection>
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  </doc>
  <doc>
    <id>62636</id>
    <completedYear/>
    <publishedYear>2024</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
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    <title language="eng">DELTA - Investigation of corrosion and microbially influenced corrosion processes by means of X-Ray absorption spectroscopy</title>
    <abstract language="eng">Alloys relevant for corrosion research are inherently complex in chemical composition and microstructure. Their local surface chemistry differs significantly from the bulk composition and their surfaces are subjected to ever changing environmental conditions. Thus, a thorough understanding of the mechanisms leading to material degradation and failure requires a detailed characterisation of the initial and final states as well as an adequate monitoring of the relevant properties as a function of time. Moreover, corrosion products tend to oxidize in contact with the atmosphere. Microbially influenced corrosion (MIC) poses a particular challenge regarding the experimental methods that can be used for the investigations. The use of highly sensitive methods of ultra-high vacuum surface analysis requires the removal of the biofilm, which leads to significant changes in the interfacial chemistry. &#13;
&#13;
In recent projects we applied X-ray absorption near edge spectroscopy (XANES) to investigate mechanisms of aqueous corrosion, high temperature corrosion and MIC processes of stainless steel and multi-principal element alloys (MPEAs). By combining in situ XANES studies on model thin films with ex situ XANES analysis of technical samples we aimed to obtain a holistic understanding of degradation processes. &#13;
&#13;
In this presentation we will summarize our results on the application of XANES to corrosion and MIC research with two case studies. In the first case study, in situ and ex situ XANES were used for the investigation of aqueous and high-temperature corrosion processes of alloys from FeNiCr-Mn MPEA family to clarify the role of Mn in determining the corrosion resistance and passive film formation. Our results indicate that Mn plays a major role in suppressing Fe oxidation. In the second example we have shown by means of in situ and ex situ XANES analysis that cultivation of metal reducing bacteria (MRB) in abundance of Fe(III) ions leads to a significant increase in electrochemical activity and thus, to an accelerated corrosion of the metallic substrate. This implies that bacterial colonies released from active corrosion sites might show a preconditioning effect and pose a higher corrosion risk.</abstract>
    <enrichment key="eventName">eMRS 2024 Spring Meeting</enrichment>
    <enrichment key="eventPlace">Strasbourg, France</enrichment>
    <enrichment key="eventStart">27.05.2024</enrichment>
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    <author>Özlem Özcan Sandikcioglu</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Corrosion</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>XANES</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>MIC</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Multi-principal element alloys</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="institutes" number="">6 Materialchemie</collection>
    <collection role="institutes" number="">6.2 Material- und Oberflächentechnologien</collection>
    <collection role="themenfelder" number="">Umwelt</collection>
    <collection role="themenfelder" number="">Material</collection>
    <collection role="themenfelder" number="">Degradationsmechanismen</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Präsentation</collection>
    <collection role="themenfelder" number="">Biokorrosion</collection>
  </doc>
  <doc>
    <id>62635</id>
    <completedYear/>
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    <language>eng</language>
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    <title language="eng">Autonomous exploration of new alloy chemistries using a Material Acceleration Platform (MAP)</title>
    <abstract language="eng">The discovery and commercialization of new corrosion resistant alloys by conventional approaches and manual experimentation is a slow and expensive process. In the last few years, efforts have been dedicated internationally to design self-driving-laboratories, also called Material Acceleration Platforms (MAPs). MAPs integrate material synthesis, characterization and testing modules into circular workflows through automation and use artificial intelligence (AI) for efficient and autonomous experiment design, property prediction and data analysis.&#13;
We have established a MAP for corrosion research by automating diverse liquid operations, electrochemical testing and data evaluation, where the test results are interpreted via a machine learning (ML)-based backend. The workflows of the electrochemistry module are configured for electrodeposition of different alloys and subsequently performing electrochemical corrosion testing. The platform uses the results of the electrochemical tests to determine the next set of deposition parameters in a continuous and autonomous loop until the user-defined objectives are met.&#13;
In this project we used the MAP to design new multi-principal element alloys (MPEAs) as corrosion resistant electrode materials for H2O and CO2 electrolysis. One campaign contains a maximum of 144 runs. From each successful campaign top five leads and another five randomly selected materials proceed to upscaling either by electrodeposition at larger scale or as bulk ingots cast by means of arc-melting. With these samples, a detailed chemical and electrochemical characterization using surface analysis techniques was performed to validate the success of the MAP-based optimization. The presentation will give an overview of the design and build phases of our MAP, its modules and workflows. Moreover, we will summarize our results from the FeNiCrCuCoMo MPEA system.</abstract>
    <enrichment key="eventName">EUROCORR 2024</enrichment>
    <enrichment key="eventPlace">Paris, France</enrichment>
    <enrichment key="eventStart">01.09.2024</enrichment>
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    <author>Özlem Özcan Sandikcioglu</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>MAPs@BAM</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Corrosion</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Electrodeposition</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Material Acceleration Platform</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Electrochemistry</value>
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  <doc>
    <id>62634</id>
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    <pageFirst/>
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    <title language="eng">Exploration of Fe-Ni-Cr-X systems using diffusion couples for new alloy chemistries with improved mechanical and corrosion properties</title>
    <abstract language="eng">Multi-principal element alloys (MPEAs) are disrupting methodologies in conventional alloy design, characterized by a singular dominant element dictating composition. The traditional optimization of the functional properties of alloys primarily relies on microalloying techniques. The advent of MPEAs has significantly broadened the chemical landscape available for exploration, approaching near-infinite possibilities. Consequently, innovative methodologies are imperative for discovering new alloys that exhibit properties customized for specific applications, simultaneously mitigating dependence on critical minerals. One promising approach for rapid screening of possible alloy chemistries and exploring the hitherto untouched regions of ternary, quaternary or higher order phase diagrams is the use of diffusion couples and multiples.&#13;
The present study focusses on the exploration of quaternary multi-principle-element alloys (MPEAs) using diffusion multiples. We established diffusion systems by combining an equimolar ternary alloy (FeNiCr) with single diffusing elements Mn, Mo and Ta. Using ThermoCalc® and DICTRA® simulations, we determined suitable parameters (temperature and diffusion time) that would lead to the formation of single-phase alloys and diffusion lengths (&gt;50 μm) that suit the application of high-resolution characterization methods. Microstructural and compositional characterization was performed via scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX), electron probe microanalyzer (EPMA) and correlated to local mechanical properties evaluated by means of nanoindentation. Selected compositions&#13;
from the diffusion couples were recast and homogenized to obtain bulk samples for the assessment of high-temperature and aqueous corrosion properties.&#13;
Our results indicate that the ThermoCalc simulations have a good predictive power for crystallographic phases for Mn and Mo containing MPEAs derived from the diffusion couples. Moreover, our data on FeCrNi-Ta system provides valuable experimental input for respective databases necessary for simulation of phase diagrams.&#13;
The presentation will summarize our methodology using diffusion couples as an efficient tool for exploring compositional spaces of MPEAs in the search for novel alloy chemistries and the results of our correlative study on the mechanical and corrosion properties of the selected quaternary systems.</abstract>
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    <author>Özlem Özcan Sandikcioglu</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>CCMat</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Corrosion</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Diffusion couples</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Multi-principal element alloys</value>
    </subject>
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  </doc>
  <doc>
    <id>62637</id>
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    <language>eng</language>
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    <title language="eng">The interplay of anodic passivation and oxygen evolution on multi-principal element alloys (MPEAs)</title>
    <abstract language="eng">Multi-principal element alloys (MPEAs) are of great academic and industrial interest as emerging materials for engineering applications as well as potential electrode materials in energy conversion and storage. Several MPEAs have been studied for their general corrosion behavior, but studies on their dissolution in the high anodic “transpassive” potentials relevant for oxygen evolution reaction (OER) and local corrosion behavior remained scarce. &#13;
In this project we have investigated CrMnFeCoNi, FeCrNi and CrCoNi MPEAs in terms of their transpassive behavior in NaCl electrolytes and artificial seawater [1, 2]. We introduced a characterization procedure to distinguish the individual contributions of oxygen evolution reaction (OER) and alloy dissolution [2]. This scheme utilizes scanning electrochemical microscopy (SECM) for detecting the onset of OER and employs quantitative chemical analysis methods, namely inductively coupled mass spectrometry (ICP-MS) and ultraviolet-visible light (UV-Vis) spectroscopy, to elucidate the processes of metal dissolution. In-situ atomic force microscopy (AFM) and scanning Kelvin probe force microscopy (SKPFM) were used to analyze the corrosion morphology and surface potentials before, during, and after passivity breakdown.&#13;
Our results clearly demonstrate the superior corrosion behavior of CrCoNi and FeCrNi MPEA in comparison to the CrFeMnCoNi HEA, as well as AISI 304 stainless steel. We have observed that significant OER occurs in parallel with metal dissolution on the CrCoNi and FeCrNi MPEA surfaces during anodic polarization at potentials relevant to water electrolysis. Most importantly, our findings underscore the necessity of analyzing metal ions dissolved into the electrolyte to accurately assess the Faradaic efficiencies of non-noble metal OER electrocatalysts. The presentation will summarize our characterization procedure and give an overview on the key properties of the studied MPEAs. &#13;
&#13;
&#13;
[1] A. Wetzel, M. von der Au, P.M. Dietrich, J. Radnik, O. Ozcan, J. Witt, The comparison of the corrosion behavior of the CrCoNi medium entropy alloy and CrMnFeCoNi high entropy alloy, Appl. Surf. Sci., 601 (2022) 154171.&#13;
[2] A. Wetzel, D. Morell, M. von der Au, G. Wittstock, O. Ozcan, J. Witt, Transpassive Metal Dissolution vs. Oxygen Evolution Reaction: Implication for Alloy Stability and Electrocatalysis, Angew. Chem. Int. Ed. Engl., n/a (2024) e202317058.</abstract>
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    <enrichment key="eventPlace">Gothenburg, Sweden</enrichment>
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    <author>Özlem Özcan Sandikcioglu</author>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Corrosion</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Electrocatalysis</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Oxygen evolution reaction</value>
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    <collection role="themenfelder" number="">Elektrische Energiespeicher und -umwandlung</collection>
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    <pageNumber/>
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    <issue/>
    <volume>8</volume>
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    <publisherName>Springer Materials</publisherName>
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    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
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    <title language="eng">Bayesian assessment of commonly used equivalent circuit models for corrosion analysis in electrochemical impedance spectroscopy</title>
    <abstract language="eng">Electrochemical Impedance Spectroscopy (EIS) is a crucial technique for assessing corrosion of metallic materials. The analysis of EIS hinges on the selection of an appropriate equivalent circuit model (ECM) that accurately characterizes the system under study. In this work, we systematically examined the applicability of three commonly used ECMs across several typical material degradation scenarios. By applying Bayesian Inference to simulated corrosion EIS data, we assessed the suitability of these ECMs under different corrosion conditions and identified regions where the EIS data lacks sufficient information to statistically substantiate the ECM structure. Additionally, we posit that the traditional approach to EIS analysis, which often requires measurements to very low frequencies, might not be always necessary to correctly model the appropriate ECM. Our study assesses the impact of omitting data from low to medium-frequency ranges on inference results and reveals that a significant portion of low-frequency measurements can be excluded without substantially compromising the accuracy of extracting system parameters. Further, we propose simple checks to the posterior distributions of the ECM components and posterior predictions, which can be used to quantitatively evaluate the suitability of a particular ECM and the minimum frequency required to be measured. This framework points to a pathway for expediting EIS acquisition by intelligently reducing low-frequency data collection and permitting on-the-fly EIS measurements.</abstract>
    <parentTitle language="eng">npj Materials Degradation</parentTitle>
    <identifier type="doi">10.1038/s41529-024-00537-8</identifier>
    <identifier type="urn">urn:nbn:de:kobv:b43-623392</identifier>
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    <enrichment key="date_peer_review">06.01.2025</enrichment>
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    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>Runze Zhang</author>
    <author>Debashish Sur</author>
    <author>Kangming Li</author>
    <author>Julia Witt</author>
    <author>Robert Black</author>
    <author>Alexander Whittingham</author>
    <author>John R. Scully</author>
    <author>Jason Hattrick-Simpers</author>
    <subject>
      <language>eng</language>
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      <value>Electrochemical Impedance Spectroscopy (EIS)</value>
    </subject>
    <subject>
      <language>eng</language>
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      <value>MAPz@BAM</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Bayesian Inference</value>
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      <language>eng</language>
      <type>uncontrolled</type>
      <value>Corrosion</value>
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    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
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    <collection role="institutes" number="">6.2 Material- und Oberflächentechnologien</collection>
    <collection role="themenfelder" number="">Material</collection>
    <collection role="themenfelder" number="">Degradationsmechanismen</collection>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei für die Öffentlichkeit verfügbar ("Open Access")</collection>
    <collection role="unnumberedseries" number="">Wissenschaftliche Artikel der BAM</collection>
    <thesisPublisher>Bundesanstalt für Materialforschung und -prüfung (BAM)</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-bam/files/62339/2024.Zhang_et_al.npjMaterDegrad.8.120.pdf</file>
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