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88 results for “Corrosion”
Effect of Nd on high temperatures deformation and corrosion behavior of AZE Mg alloy
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Data from: Effect of pH regulation by microbes on corrosion behaviour of duplex stainless steel 2205 in acidic artificial seawater environment
Sulphate reducing bacteria (SRB) can regulate environmental pH because of their metabolism. Since local acidification results in pitting corrosion, the potential capacity of pH regulation by SRB would have important consequences for electrochemical aspects of the bio-corrosion process. This study focussed on identifying the effect of pH on the corrosion of duplex stainless steel (DSS) 2205 in a nutrient rich artificial seawater medium containing SRB species, Desulfovibrio vulgaris. DSS samples were exposed to the medium for 13 days at 37 0C at pH ranging from 4.0 to 7.4. The open circuit potential value (OCP), sulphide level, pH and number of bacteria in the medium were recorded daily. Electrochemical impedance spectroscopy (EIS) and potential dynamic polarization were used to study the properties of the films and corrosion behaviour of the material. Inductively coupled plasma mass spectrometry (ICPMS) was used to measure the concentration of cations Cr, Fe, Ni, Mo, Mn in the experimental solution after 13 days. Scanning electron microscopy (SEM) and Energy Dispersive X-Ray Spectroscopy (EDX) were used for surface analysis. The results showed the pH changed from acidic values set at the beginning of the experiment to approximately pH 7.5 after 5 days due to bacterial metabolism. After 13 days, the highest iron concentration was in the solution that was initially at pH 4 accompanied by pitting on the stainless steel. Sulphide was present on all specimens but with more sulphide corrosion products at pH 4. The results of this study suggest that the corrosion process for the first few days exposure at low pH was driven by pH in solution rather than by bacteria. The increasing pH during the course of the experiment slowed down the corrosion process of materials originally at low pH. The nature and mechanism of SRB attack on duplex stainless steel at different acidic environments are discussed.
Assessing corrosion resistance of 2D nanomaterial-based coatings on stainless steel substrates
<p><span>Two dimensional (2D) materials have elicited considerable interest in the past decade due to a diverse array of novel properties ranging from high surface to mass ratios, a wide range of band gaps (insulating boron nitride to semiconducting transition metal dichalcogenides), high mechanical strength and chemical stability. Given the superior chemo-thermo-mechanical properties, 2D materials may provide transformative solution to a familiar yet persistent problem of significant socio-economic burden: the corrosion of stainless steel (SS). With this broader perspective, we investigate corrosion resistance properties of stainless steel coated with 2D nanomaterials; molybdenum disulfide (MoS<sub>2</sub>), boron nitride (BN), bulk graphite in 3.5 wt. % aqueous NaCl solution. The nanosheets were prepared by a novel liquid phase exfoliation technique and the coatings were made by a paint brush to achieve uniformity. Open circuit potential (OCP) and potentiodynamic plots indicate the best corrosion resistance is provided by the MoS<sub>2</sub> and the BN coatings. Superior performance of the coating is attributed low electronic conductivity, large flake size, and uniform coverage of SS substrate, which likely impeded the corrosive ions from the solution to diffuse through the coating. </span></p>
A model of digestive tooth corrosion in lizards: experimental tests and taphonomic implications
<p>Abstract </p><p>Corrosion patterns induced by gastric fluids on the skeleton of prey animals may depend on the nature of the corrosive agents (acid, enzymes) as well as on the composition of the hard parts and the soft tissues that surround them. We propose a framework for predicting and interpreting corrosion patterns on lizard teeth, our model system, drawing on the different digestive pathways of avian and non-avian vertebrate predators. We propose that high-acid, low-enzyme systems (embodied by mammalian carnivores) will lead to corrosion of the tooth crowns, whereas low-acid, high-enzyme systems (embodied by owls) will lead to corrosion of the tooth shafts. We test our model experimentally using artificial gastric fluids (with HCl and pepsin) and feeding experiments, and phenomenologically using wild-collected owl pellets with lizard remains. Finding an association between the predictions and the experimental results, we then examine corrosion patterns on nearly 900 fossil lizard jaws. Given an appropriate phylogenetic background, our focus on physiological rather than taxonomic classes of predators allows the extension of the approach into Deep Time.</p><p></p>
Multifunctional corrosion control system as a sustainable approach for reinforced concrete elements
<p>Corrosion inhibitors can be utilized to decrease the corrosion kinetics and therefore increase the durability of reinforced concrete structures. Recently, a green synthesized organic compound, 1-benzyl-4-phenyl-1H-1,2,3-triazole (BPT), was shown to be a successful green organic corrosion inhibitor for mild steel. Studies suggested that the BPT adsorbs chemically onto the steel and acts as a mixed inhibitor, suppressing both the anodic and cathodic corrosion kinetics of steel. In addition, microcapsules have shown to be an efficient way for a controlled inhibitor release in reinforced concrete structures. On the other hand, geopolymers (GPs) comprised of a long range of covalently bonded alumino-silicates, with amorphous network structure are generally considered as a suitable substitute for OPC for many structural applications due to their high strength and durability. The use of recycled waste materials or natural abundant materials for the production of GPs has attracted world-wide attention as it presents an environment-friendly aspect that may shed light on for replacing traditional OPC by its sustainability. One of the advantages of GPs is the significant reduction to CO2 emission due to the energy consumption, the geopolymers utilize materials such as fly-ash, which is a byproduct of coal combustion, or natural precursor materials (clays, basalt rocks, etc.) and their derives (metakaolin), which does not produce net CO2 emission. Recent studies have shown that GPs based cements can hinder the corrosion of reinforcement steel in concrete structures when compared to OPC, mostly because of lower chloride ingress (due to barrier protective capabilities) and the highly alkaline pH nature of geopolymer cements.</p>
Urban Stream Environmental and Sequencing Datasets for Exploring the Impacts of Full-Scale Distribution System Orthophosphate Corrosion Control Implementation on the Microbial Ecology of Hydrologically Connected Urban Streams
<p>The dataset of environmental parameters and sequence fastqs used to create figures and do analysis in the paper <strong>Exploring the Impacts of Full-Scale Distribution System Orthophosphate Corrosion Control Implementation on the Microbial Ecology of Hydrologically Connected Urban Streams </strong>submitted to Applied and Environmental Microbiology. </p>
Corrosion in Industrial Complexes in Ostrava
<p>The dataset <em>Corrosion in Industrial Complexes in Ostrava</em> contains 105 high-resolution images capturing various instances of corrosion within industrial complexes located in Ostrava, Czech Republic. Each image is labeled with precise segmentation masks of the corrosion areas. The images were captured with a Nikon D5600 DSLR camera and subsequently resized to a uniform size of 2048x2048 pixels. The data is split into training, validation, and test sets with a ratio of 75:15:15.</p>
Supplementary data for the paper: "Self-healing concrete with a bacteria-based or crystalline admixture as healing agent to prevent chloride ingress and corrosion in a marine environment'"
<div> <p>Supplementary data for the paper: "Self-healing concrete with a bacteria-based or crystalline admixture as healing agent to prevent chloride ingress and corrosion in a marine environment"<br><br>Open data concerning experimental work. Bacteria-based agents (BAS) and crystalline admixtures (CA) are explored as healing agents to enhance chloride resistance and prevent corrosion. Healing of 100 µm and 300 µm wide cracks was investigated, in combination with two conditioning methods. Either the samples were subjected to wet/dry cycles for 3 months before exposure (“healed”), or they were directly exposed to artificial seawater after crack creation (“unhealed”). </p> </div> <h2>Files</h2>
Potentiodynamic polarization corrosion tests
<p><span>Representative corrosion test on</span><span> as-built, Ni-P and Ni-P+DLC </span><span>samples in the ALCOM PoC project.</span></p>
High performance cation exchange membranes synthesized via in-situ emulsion polymerization without organic solvents and corrosive acids
<p>Dataset supporting journal publication:</p> <p><strong>Abstract:</strong> The synthesis of cation exchange membranes (CEMs) usually involves using organic solvents and/or sulfonation process. In this study, green and scalable synthesis of high performance CEMs is achieved without organic solvents and sulfonation. The synthesis is carried out via in-situ polymerization of lithium styrene sulfonate in porous support. Different preparation procedures are developed and optimized. Functional sulfonate groups were successfully loaded onto and into the membrane support, as verified by FTIR. Besides, water plays an important role during membrane synthesis. By reducing the amount of water used, the ratio of functional polymers to membrane support in the synthesized CEMs is increased. Therefore, the synthesized CEMs show increased ion exchange capacity (IEC). This is significant because it means that high IEC can be achieved without introducing cation exchange resins to the membranes. Finally, the synthesized membranes demonstrate high desalination performance. This new methodology may shed new light on preparing CEMs in an efficient and eco-friendly way.</p>
A Comprehensive Reliability-Based Framework for Corrosion Damage Monitoring and Repair Design of Reinforced Concrete Structures
<p>Corresponding data set for Tran-SET Project No. 17STLSU03. Abstract of the final report is stated below for reference:</p> <p>"In this work, we developed a comprehensive framework for corrosion management of reinforced concrete (RC) structures. This framework includes critical steps of an effective approach to quantify the damage evolution as well as providing the timeframe for effective maintenance/repair strategies for corrosion assessment in RC structures. The framework included several activities including the use of indirect and direct inspection tools, theoretical development for damage prediction, experimental measurements and theoretical development of repair time based on reliability. The uniqueness of the framework is the integration of deterministic modeling of corrosion damage evolution by using mechanistic analysis with statistical modeling on corrosion of RC structures by using measurements from the field (or natural environment) and experimental testing (in the laboratory). The framework includes a simple algorithm that relies in each development and task generated from this work to monitor and estimate the status of the reinforced concrete structures and the most suitable strategy to extend the life of the system while maximizing the reliability."</p>
Self-Healing Microcapsules as Concrete Aggregates for Corrosion Inhibition in Reinforced Concrete
<p>Corresponding data set for Tran-SET Project No. 17CLSU08. Abstract of the final report is stated below for reference:</p> <p>"Reinforced Concrete (RC) structures are vital to the US’s civil infrastructure for their strength and versatility. Unfortunately, RC elements deteriorate rapidly when exposed to corrosive environments. One possible solution is to extend the life of RC elements and systems using microencapsulated corrosion inhibitors to reduce the rebar corrosion rate. The capsules house an anodic corrosion inhibitor agent including calcium nitrate (CN) and triethanolamine (TEA). The integration of such microencapsulated materials will enhance the durability and extend the useful life by controlling the corrosion precursors and the corrosion process during damage evolution. Therefore, this work aims to develop and characterize the performance of microcapsules containing corrosion inhibitors (CN-C and TEA-C) in comparison to those introduced as admixtures (CN-A and TEA-A) for reinforced concrete applications. For the corrosion tests, all samples were subjected to continuous ponding, wet/dry cycles, and fog chamber exposure to simulate different environments. The results showed that TEA-C is more effective in giving a corrosion protection than TEA-A and the Control. In contrast, the corrosion protection performance of both CN-A and CN-C was alike. The corrosion kinetics was slightly reduced on inhibited rebars compared to unprotected rebars (the Control). When comparing TEA-C and CN-C, in the presence of each stimulus (pH changes for TEA-C, cracks for CN-C), TEA-C protected the rebar better than CN-C. For the admixture samples (TEA-A and CN-A) that do not need stimuli in the concrete, a stable and better corrosion protection was provided by CN-A. The outcome of this proof-of-concept study in the laboratory validates the merit of the proposed technology for corrosion control in RC structures."</p>
Toward Non-Corrosion and Highly Sustainable Structural Members by Using Ultra-High-Performance Materials for Transportation Infrastructure
<p>Corresponding data set for Tran-SET Project No. 18STUTA01. Abstract of the final report is stated below for reference:</p> <p>"This research focused on investigating a highly sustainable and efficient reinforced concrete structural member for future infrastructure by utilizing emerging high-performance materials. These materials include ultra-high-performance fiber-reinforced concrete (UHP-FRC) and corrosion-resistant high-strength fiber-reinforced polymer (FRP) bars. Four reduced scale UHP-FRC specimens were tested under large displacement reversals to prove the proposed new ductile-concrete strong-reinforcement (DCSR) design concept by fully utilizing these ultra-high-performance materials. Micro steel fibers were incorporated into three specimens and ultra-high molecular weight polyethylene fibers were blended into the fourth specimen. One specimen with ASTM A1035 MMFX high-strength steel rebars, one with high-strength glass fiber reinforced polymer (GFRP) rebars, and two with high-strength basalt fiber reinforced plastic (BFRP) rebars were tested. The beams had a reinforcement ratio of 14% to 15%. The test results concluded that the beams could sustain very large cyclic drift ratios without major damage in the UHP-FRC material, which provided ample shear strength and confinement to the reinforcement throughout the testing. Even with the high amount of reinforcement, UHP-FRC’s superior ductility provided a very stable cyclic behavior up to some very large drift ratios. Because of the DCSR design, all specimens also exhibited a self-centering ability, which considerably reduces the residual displacement after being subjected to large displacement reversals. The test results also show that the high damage-resistance and self-centering characteristics of the proposed UHP-FRC flexural members can provide excellent resilience for building structures."</p>
Development of Metals Corrosion Maps of Arkansas and Maintenance of Cross-Drains
<p>Corresponding data set for Tran-SET Project No. 18GTASU01. Abstract of the final report is stated below for reference:</p> <p>"Corrosion potential of metallic structures in alluvial soils is governed by chemical and electromagnetic properties of the soils. Geotechnical engineers are generally more concerned about different types of soils and their physical and mechanical properties than the chemical aspects. The main objective of this study is to analyze the geotechnical, electrochemical and electromagnetic properties of soils in Arkansas. Important parameters (e.g., soil resistivity) related to corrosion potential of metal culverts have been predicted through neural network (NN) models. The developed NN models have been trained and verified by using laboratory test results of soil samples collected from Arkansas Department of Transportation (ARDOT), and survey data obtained from the United States Department of Agriculture (USDA) and Arkansas Department of Environmental Quality (ADEQ). Finally, the Geographic Information System (GIS) based corrosion risk maps of three different types of metal pipes have been developed based on the available soil properties, metal properties, and water quality data. The developed maps will help ARDOT engineers to assess corrosion potential of metal pipes prior to the new construction and repair projects and use proper culvert and cross drain materials."</p>
Dataset: New insights into the corrosion of orthopedic Ti-6Al-4V under cathodic polarization
<p><strong>Title: New insights into the corrosion of orthopedic Ti-6Al-4V under cathodic polarization </strong><br>Authors: Agata Sotniczuk, Baojie Dou, Chenyang Xie, Junhui Tang, Damian Kalita, Witold Chromiński, Halina Garbacz, Fan Sun, Kevin Ogle<br><strong>Corresponding Author: Agata Sotniczuk ORCID: 0000-0002-3468-0468</strong></p> <p>This record contains files generated in the preparation process of the following publication:<br>New insights into the corrosion of orthopedic Ti-6Al-4V under cathodic polarization <br>Agata Sotniczuk, Baojie Dou, Chenyang Xie, Junhui Tang, Damian Kalita, Witold Chromiński, Halina Garbacz, Fan Sun, Kevin Ogle submitted to Corrosion Science (Elsevier)</p> <p><strong>This research was funded in whole by National Science Centre, Poland [2023/48/C/ST11/00085]: Sonatina 7 grant.</strong></p> <p>Designations: <br>PBS: Phosphate buffer saline solution<br>PDP: Potentiodynamic Polarization<br>PSP: Potentiostatic Polarization<br>ICP-AES: Inductively coupled plasma atomic emission spectrometer<br>OCP: Open Circuit Potential<br>SEM: Scanning electron microscope<br>TEM: Transmission electron microscope<br>EDS: Energy dispersive spectroscopy</p> <p>General remarks: Conditions of OCP, PDP and PSP tests: 1)Values of electrochemical potentials were measured vs. saturated calomel electrode (SCE); 2)Tests were performed at room temperature (23 Celsius degrees), 4) Tests were performed in a flow cell and the flowing rate of solution was 1 ml/min</p> <p>Files formats: Raw data and calculated results of OCP, PDP and PSP tests: .csv and .xls. SEM micrographs: .tif. TEM micrographs, EDS maps: .jpg. EDS chemical distribution: csv. and .xls.</p> <p><strong>Content of data files is described in details in README_CorrSci2024.txt file</strong></p> <p><strong>DOI: 10.5281/zenodo.12727325</strong></p> <p><strong>Data are published under Creative Commons Zero v1.0 Universal (CC0) license</strong></p> <p><strong>How to cite Dataset:</strong> Sotniczuk, A., Dou, B., Xie, C., Tang, J., Kalita, D., Chromiński, W., Garbacz, H., Sun, F., & Ogle, K. (2024). Dataset: New insights into the corrosion of orthopedic Ti-6Al-4V under cathodic polarization [Data set]. Zenodo. https://doi.org/10.5281/zenodo.12727325</p>
Pitting corrosion of AA1050 in ethanol-containing fuels: Classification dataset
<p>This dataset was used to predict the occurrence of ethanol-based pitting corrosion in AA1050 using binary classification. It consists of five system descriptors:</p> <ul> <li>Temperature (°C)</li> <li>Chloride content (ppm)</li> <li>Water content (ppm)</li> <li>Grit size of polishing paper</li> <li>Ethanol content (% by volume) of the fuel</li> </ul> <p>The target variable, named "corr," indicates corrosion occurrence, where 1 means corrosion occurred and 0 means no corrosion occurred. The dataset comprises 115 samples in total: 105 samples where corrosion occurred and 10 samples where no corrosion occurred.</p>
Dataset for Assessment of Commonly Used Equivalent Circuit Models for Corrosion Analysis and Frequency Reduction Analysis
<p>Datasets for Submission: "<strong>An Assessment of Commonly Used Equivalent Circuit Models for Corrosion Analysis: A Bayesian Approach to Electrochemical Impedance Spectroscopy</strong>"</p> <p>This dataset accompanies the above-mentioned submission and includes the following compressed files:</p> <p>Generated EIS Datasets for Three Corrosion Systems Mentioned in the submission and corresponding Nyquist Plots:</p> <ul> <li>Uniform corrosion system: <em><a href="../api/records/13351508/draft/files/Uniform_Generated%20data%20and%20Nyquist%20plots.rar/content" target="_blank" rel="noopener noreferrer">Uniform_Generated data and Nyquist plots.rar</a></em></li> <li>Passivating system: <em><a href="../api/records/13351508/draft/files/Passivating_Generated%20EIS%20data%20and%20Nyquist%20plots.rar/content" target="_blank" rel="noopener noreferrer">Passivating_Generated EIS data and Nyquist plots.rar</a></em></li> <li>Coating system: <em><a href="../api/records/13351508/draft/files/Coating_Generated%20EIS%20data%20and%20Nyquist%20plots.rar/content" target="_blank" rel="noopener noreferrer">Coating_Generated EIS data and Nyquist plots.rar</a></em></li> </ul> <p>Characteristic EIS Data Selected for Frequency Reduction Analysis:</p> <ul> <li>Uniform corrosion system: <em><a href="../api/records/13351508/draft/files/Uniform_charac_EIS.npy/content" target="_blank" rel="noopener noreferrer">Uniform_charac_EIS.npy</a></em></li> <li>Passivating system: <em><a href="../api/records/13351508/draft/files/Passivating_charac_EIS.npy/content" target="_blank" rel="noopener noreferrer">Passivating_charac_EIS.npy</a></em></li> <li>Coating system: <em><a href="../api/records/13351508/draft/files/Coating_charac_EIS.npy/content" target="_blank" rel="noopener noreferrer">Coating_charac_EIS.npy</a></em></li> </ul>
Study on corrosion behavior and corrosion scale characteristics of P110S steel in CO2-H2S saturated high-salt aqueous with pH buffer
<p>The corrosion behavior of P110S steel in CO<sub>2</sub>-H<sub>2</sub>S saturated high-salt aqueous with pH buffer was investigated using an autoclave. SEM, EDS, XRD, and Pourbaix diagrams were used to analyze the corrosion scale characteristics. P110S steel experienced severe localized corrosion in high-salt aqueous containing saturated with CO<sub>2</sub>-H<sub>2</sub>S despite the addition of pH buffer. The main component of the corrosion scale was mackinawite and FeCO<sub>3</sub>. The corrosion scale with mackinawite as the main component was dense and had a good protective effect. The corrosion was very light in the area covered by this corrosion scale. However, this corrosion scale was poorly bonded to the matrix and is prone to partial cracking and peeling, which was the cause of severe localized corrosion of P110S steel.</p>
Characterisation of corrosion damage in T91/F91 steel exposed to static liquid lead-bismuth eutectic at 700-715 °C
<p>ABSTRACT: T91 samples were exposed to static liquid lead-bismuth eutectic (LBE) at 700-715 °C for 250-500 h in either an oxidising or reducing environment. Corrosion damage was characterised using electron microscopy techniques, which identified networks of LBE intrusion beneath LBE-wetted surfaces. Under reducing conditions these networks are uniformly distributed, while they appear patchier and deeper under oxidising conditions. The individual intrusions preferentially follow microstructural features, initially along prior-austenite grain boundaries, followed by penetration down martensite lath boundaries. Local depletion of Cr was observed within 4 μm of LBE intrusions and along intersecting boundaries, suggesting local Cr dissolution as the main corrosion mechanism.</p>
Data from: Effect of pH regulation by microbes on corrosion behaviour of duplex stainless steel 2205 in acidic artificial seawater environment
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