Article
Construction & Building Technology
Xin Yu, An Yuan, Gan Cui, Jianguo Liu, Xiao Xing, Zili Li
Summary: Stray current discharged by subway trains into the soil can cause pipe-soil potential fluctuations and severe corrosion. This study investigated the pitting corrosion behavior of X70 steel in a weakly alkaline simulated soil solution under different potential fluctuation ranges. Electrochemical measurement and surface characterization were used to study the influence of pipe-to-soil potential fluctuation on passivation film and pitting corrosion. X70 steel exhibited passivation characteristics in the weakly alkaline solution, with the passivation film showing a dynamic process of continuous growth or growth-dissolution due to alternating polarization. The density of the passivation film determined the initiation and development trend of pitting.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Shaohua Zhang, Yanrui Li, Yinghui Wei, Baosheng Liu, Huayun Du, Huan Wei, Lifeng Hou
Summary: This study reveals the pseudo-passivation behavior of carbon steel exposed to saturated CO2 solutions containing Cl- and HCO3-. The increase of Cl- concentration accelerates the anodic dissolution rate of the filmed surface, while the formation of pitting still relies on the presence of HCO3-, mainly due to the decrease of HCO3- adsorption as FeCO3 grows.
Article
Materials Science, Multidisciplinary
Dongxu Sun, Lei Li, Dini Wang, Shuai Ren, Fei Xie, Ming Wu
Summary: In this study, a 3D multi-physical finite element model was established to explore the effects of constant load, geometrical parameters, and multi-pitting on stress corrosion in a sea mud simulated solution. The mechanism of sulfate-reducing bacteria (SRB) promoting stress corrosion was revealed. The results showed that micron-sized pitting caused significant local stress concentration, and pitting with similar geometries had little effect on maximum anodic current density. When multiple pits were vertically distributed, the corrosion in the middle area between the two pittings increased. SRB-induced pitting caused stress concentration and tiny galvanic corrosion, making the pitting more likely to develop into micro-cracks in the depth direction.
MATERIALS & DESIGN
(2023)
Article
Electrochemistry
Shouxin Zhang, Jialin Yan, Long Zheng, Jinsheng Sun, Jianfeng Gao
Summary: The combined effect of alternating current (AC) and Cl- on the corrosion behavior of X70 steel was investigated. The corrosion rate of the steel was influenced by the concentration of Cl- and the applied AC current density. Additionally, the dissolution and diffusion of oxygen in the solution also played a role in the corrosion process.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Ying Xiao, Junlei Tang, Yingying Wang, Bing Lin, Zhen Nie, Yunfei Li, Bernard Normand, Hu Wang
Summary: The corrosion behavior of 2205 duplex stainless steel in sulfide-containing NaCl solutions at different pH values was investigated. It was found that the addition of Na2S could improve the pitting resistance of 2205 DSS in 0.8 g/L NaCl solutions, but had different effects in 35 g/L NaCl solutions depending on the pH value.
Article
Materials Science, Multidisciplinary
Mariko Kadowaki, Izumi Muto, Yu Sugawara, Nobuyoshi Hara
Summary: The research shows that the retained austenite in Fe-0.39C-1.51Si-2.01Mn steel has high dissolution resistance in NaCl-containing boric-borate buffers, acting as a barrier against pit propagation during pitting corrosion.
Article
Biophysics
Vitor Liduino, Mariana Galvao, Simone Brasil, Eliana Servulo
Summary: The study aimed to evaluate the efficiency of different cathodic protection potentials in inhibiting SRB-mediated corrosion, finding that with a decrease in potential value, the number of hydrogenase-positive SRB strains increased, leading to increased corrosion.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Huimin Qin, Tao Zhang, Yanxia Du, Lei Zhang, Yuxing Zhang, Hui Liu
Summary: This paper presents an experimental investigation on the dynamic DC stray current interference in X70 steel, conducted in a soil-simulated solution and quartz sand. The study reveals the significant impact of interference period on the corrosion rate, with differences observed between the two testing conditions. The results indicate that when the interference period is shorter than 100 s, the corrosion rate is lower in both conditions. However, when the interference period exceeds a certain threshold, the corrosion rate in the soil-simulated solution increases significantly compared to that in quartz sand.
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
(2023)
Article
Microbiology
Mihaela Marilena Stancu
Summary: This study investigated the presence of aerobic and anaerobic bacteria in a water sample from a nuclear power plant and found that these bacteria could initiate the corrosion of carbon steel. The results showed that sulfate-reducing bacteria were more abundant than heterotrophic and iron-oxidizing bacteria, and the corrosion rate of carbon steel varied depending on the incubation conditions and chemical composition.
Article
Materials Science, Multidisciplinary
Yunze Xu, Qiliang Zhang, Hao Chen, Yubin Zhao, Yi Huang
Summary: The pure corrosion, pure erosion, and erosion-corrosion behaviors of X65 carbon steel in corrosive fluid and slurry of different pH were investigated. The results showed that the corrosion pattern changed from general corrosion to pitting damage, possibly due to changes in the cathodic reaction. Sand impacts influenced the main cathodic reaction and led to the formation of pitting and small pits. An increase in solution pH resulted in more severe and scattered pitting damage.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Tianshu Li, Szu-Chia Chien, Zhe Ren, Wolfgang Windl, Frank Ernst, Gerald S. Frankel
Summary: By low temperature carburization, high fraction of interstitial carbon can significantly enhance the pitting corrosion resistance of austenitic stainless steel. Contrary to previous beliefs that carbon strengthens the passive film, it actually weakens the film but strengthens the alloy by forming strong localized bonds with metal atoms. This new understanding suggests a novel strategy for designing corrosion resistant alloys through surface engineering with concentrated interstitials forming strong bonds with matrix atoms.
Article
Materials Science, Multidisciplinary
Leonardo Bertolucci Coelho, Daniel Torres, Miguel Bernal, Gian Marco Paldino, Gianluca Bontempi, Jon Ustarroz
Summary: This study proposes the use of Scanning Electrochemical Cell Microscopy (SECCM) to collect corrosion activity from random locations on 316 L SS. Pitting corrosion was triggered by potentiodynamic polarization tests in the presence of chloride. Data science methods were employed to analyze 955 j Vs E curves and understand the conditional log(j) distributions at different potentials. The study found that the log(j) distribution was potential-dependent and became more random with increasing testing aggressiveness.
Article
Construction & Building Technology
Siddharth Chauhan, S. Muthulingam
Summary: This study investigates the surface roughness characteristics of thermo-mechanically treated reinforcing bars under pitting corrosion and elevated temperature conditions. The findings show that the surface roughness parameters change significantly with increasing levels of pitting corrosion and exposure to elevated temperatures. Microstructural examinations also reveal the formation and growth of particles at rising temperatures, which can promote initial fracture propagation at the steel sub-surface.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Mechanical
Tianqi Chen, Liang Sun, Qing Li, Chao Liu, Zhiyong Liu, Xuequn Cheng, Xiaogang Li
Summary: The corrosion failure of blast furnace gas pipeline made of Q235 carbon steel in a steel plant was comprehensively investigated. The mechanism of pitting corrosion was found to be acid chemical corrosion and electrochemical corrosion. Chlorine was found to be enriched in the rust layer.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Mechanical
Qingyu Qin, Boxin Wei, Yunlong Bai, Qi Fu, Jin Xu, Cheng Sun, Chuan Wang, Zhenyao Wang
Summary: The study found that the corrosion rate of X80 pipeline steel in coastal saline soil decreases as the AC frequency increases. At low frequencies, the corrosion product films formed on the specimen surfaces contain more defects, resulting in severe pitting corrosion.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Electrochemistry
Abdul Qayoom Mugheri, Shaista Khan, Ali Asghar Sangah, Aijaz Ahmed Bhutto, Muhammad Younis Laghari, Nadeem Ahmed Mugheri, Asif Ali Jamali, Arsalan Ahmed Mugheri, Nagji Sodho, Abdul Waheed Mastoi, Aftab Kandhro
Summary: Green hydrogen has the potential to transition to a pollution-free energy infrastructure. This study proposes a solution to produce hydrogen during the photoelectrochemical process, offering greater stability and control over chemical reactions. Techno-economic assessments show the efficiency and economic feasibility of co-producing value-added chemicals to enhance green hydrogen production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Danpeng Cheng, Wuxin Sha, Qigao Han, Shun Tang, Jun Zhong, Jinqiao Du, Jie Tian, Yuan-Cheng Cao
Summary: LiNixCoyMn1-x-yO2 (NCM) is a critical cathode material for lithium-ion batteries in electric vehicles. The aging of cathode/electrolyte interfaces leads to capacity degradation and long-term cycle instability. A novel neural network model called ACGNet is developed to predict electrochemical stability windows of crystals, allowing for high-throughput screening of coating materials. LiPO3 is identified as a promising coating material with high oxidation voltage and low cost, which significantly improves the cycle stability of NCM batteries. This study demonstrates the accuracy and potential of machine learning in battery materials.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
P. Mohana, R. Yuvakkumar, G. Ravi, S. Arunmetha
Summary: This study successfully fabricates a non-noble CuO/NiO/rGO nanocomposite and investigates its electrocatalytic performance for oxygen evolution reaction in alkaline environment. The experimental results demonstrate that the electrocatalyst exhibits high activity and good stability, offering a new synthetic approach for sustainable energy production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Qiong Qu, Jing Guo, Hongyu Wang, Kai Zhang, Jingde Li
Summary: In this study, a bifunctional electrode host design consisting of carbon nanofibers implanted ordered porous Co-decorated Al2O3 supported on carbon nanotube film (CNTF) was proposed to address the shuttling effect of lithium polysulfides (LiPSs) and dendrite formation of metal lithium anode in lithium-sulfur (Li-S) batteries. The electrode exhibited excellent conductivity, efficient confinement of LiPSs, and catalytic conversion performance, resulting in high initial capacity and good capacity retention during cycling. As an anode, the electrode showed excellent Li+ diffusion performance and uniform lithium growth behavior, achieving a dendrite-free lithium electrode. The flexible pack cell assembled from these electrodes delivered a specific capacity of 972 mAh g(-1) with good capacity retention.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Hong Zhang, Jin-Peng Yu, Chen Chen, Cheng-Yong Shu, Guang-Yu Xu, Jie Ren, Kai Cui, Wen-Fang Cai, Yun-Hai Wang, Kun Guo
Summary: Spray coating of acetylene black nanoparticles onto stainless steel mesh can enhance its biofilm formation ability and current density, making it a promising electrode material for microbial electrochemical systems. The spray coating method is simple, cost-effective, and suitable for large-size stainless steel electrodes.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Binpeng Hou, Jingjin Chen, Li-Hong Zhang, Xiaowen Shi, Zizhong Zhu
Summary: The electrochemical performance of Li1.20Mn0.44Ni0.32Co0.04O2 and its oxygen-deficient phase Li1.20Mn0.44Ni0.32Co0.04O1.83 was studied through first-principles calculations. The results show that the oxygen-deficient phase has a higher theoretical capacity but lower voltage platform and higher chemical activity compared to the pristine phase.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Yating Du, Sayoko Shironita, Daisuke Asakura, Eiji Hosono, Yoshitsugu Sone, Yugo Miseki, Eiichi Kobayashi, Minoru Umeda
Summary: This study investigates the effect of high- and low-temperature environments on the charge-discharge performance of a Li-ion battery. The deterioration mechanisms of the battery at different temperatures are analyzed through various characterization techniques. The results indicate that the battery performance deteriorates more significantly at a low-temperature environment of 5 degrees C compared to higher temperatures. The understanding of the deterioration mechanisms can contribute to the development of safer battery usage methods.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Si-Si Shi, Zhi-Xiang Yuan, Fei Zhang, Ping Chen
Summary: In this study, a new nano-electrocatalyst was prepared, which exhibited superior electrocatalytic activity for the reduction of NO2- to ammonia in a neutral electrolyte, potentially due to the synergistic enhancement between Co3O4-x and Co.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Berna Dalkiran, Havva Bekirog
Summary: This study reports the use of deep eutectic solvents (DES) based on ethylene glycol and urea as low-cost and green electrolytes for enhancing electrochemical detection of natural antioxidants. The study successfully developed a disposable and effective electrochemical sensing platform for simultaneous determination of ascorbic acid (AA) and gallic acid (GA) using NaOH nanorods on a pencil graphite electrode. The proposed electrode showed improved analytical performance, with higher peak currents and shifted oxidation potentials in DES compared to BR buffer medium.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Sijun Ren, Jianguo Huang
Summary: In this study, a novel bio-inspired nanofibrous WO3/carbon composite was synthesized using a facile hydrothermal method. The three-dimensional network structure of the composite alleviated the volume expansion of WO3 nanorods and enhanced the charge-transport kinetics. The optimized composite exhibited superior lithium storage properties.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Zhilong Zheng, Yu Chen, Hongxia Yin, Hengbo Xiao, Xiangji Zhou, Zhiwen Li, Ximin Li, Jin Chen, Songliu Yuan, Junjie Guo, Haibin Yu, Zhen Zhang, Lihua Qian
Summary: This study found that interstitial Zn cations in CoMoO4 can modulate the dissolution kinetics of Mo cations and improve the OER performance. The interstitial Zn cations can prevent the dissolution of Co cations at high potential, enhancing the durability of the catalyst.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Xiaobo Lin, Shern R. Tee, Debra J. Searles, Peter T. Cummings
Summary: Molecular dynamics simulations using the constant potential method were used to investigate the charging dynamics and charge storage of supercapacitors. The simulations revealed that the water-in-salt electrolyte exhibited the highest charge storage and significantly higher capacitance on the negative electrode. The varying contributions of different electrode regions to supercapacitor performance were also demonstrated.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Wiktoria Lipinska, Vita Saska, Katarzyna Siuzdak, Jakub Karczewski, Karol Zaleski, Emerson Coy, Anne de Poulpiquet, Ievgen Mazurenko, Elisabeth Lojou
Summary: The spatial distribution of enzymes on electrodes is important for bioelectrocatalysis. In this study, controlled spatial distribution of gold nanoparticles on Ti nanodimples was achieved. The efficiency of enzymatic O2 reduction was found to be influenced by the size of the gold nanoparticles and their colocalization with TiO2. The highest stability of enzymatic current was observed with the largest gold nanoparticles.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Tariq M. Al-Hejri, Zeenat A. Shaikh, Ahmed H. Al-Naggar, Siddheshwar D. Raut, Tabassum Siddiqui, Hamdan M. Danamah, Vijaykumar V. Jadhav, Abdullah M. Al-Enizi, Rajaram S. Mane
Summary: This study explores a promising self-growth approach for the synthesis of nickel hydroxide (Ni(OH)2) nanosponge-balls on the surface of a nickel-foam (NiF) electrode. The modified NiF electrode, named Ni(OH)2@NiF, shows distinctive nanosponge-ball morphology and demonstrates excellent energy storage capability and electrocatalytic performance in both hydrogen and oxygen evolution reactions.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Rafael Del Olmo, Gregorio Guzman-Gonzalez, Oihane Sanz, Maria Forsyth, Nerea Casado
Summary: The use of Lithium-Ion Batteries (LIBs) is becoming increasingly extensive, and it is important to optimize the devices to achieve their maximum practical specific capacity. In this study, mixed ionic-electronic conducting (MIEC) binders based on PEDOT:PSS and PEDOT: PDADMA-TFSI were developed for Li-ion cathodes, and their performance was compared with conventional formulations. The influence of electrode formulations, including the addition of conducting carbon and an Organic Ionic Plastic Cristal (OIPC), was also analyzed. The proposed binders showed improved performance compared to conventional formulations with different electrolyte types and active materials.
ELECTROCHIMICA ACTA
(2024)